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4514 lines
167 KiB
4514 lines
167 KiB
//===--- ParseDeclCXX.cpp - C++ Declaration Parsing -------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the C++ Declaration portions of the Parser interfaces.
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//
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//===----------------------------------------------------------------------===//
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#include "clang/Parse/Parser.h"
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#include "clang/AST/ASTContext.h"
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#include "clang/AST/DeclTemplate.h"
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#include "clang/AST/PrettyDeclStackTrace.h"
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#include "clang/Basic/Attributes.h"
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#include "clang/Basic/CharInfo.h"
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#include "clang/Basic/OperatorKinds.h"
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#include "clang/Basic/TargetInfo.h"
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#include "clang/Parse/ParseDiagnostic.h"
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#include "clang/Parse/RAIIObjectsForParser.h"
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#include "clang/Sema/DeclSpec.h"
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#include "clang/Sema/ParsedTemplate.h"
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#include "clang/Sema/Scope.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/Support/TimeProfiler.h"
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using namespace clang;
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/// ParseNamespace - We know that the current token is a namespace keyword. This
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/// may either be a top level namespace or a block-level namespace alias. If
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/// there was an inline keyword, it has already been parsed.
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///
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/// namespace-definition: [C++: namespace.def]
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/// named-namespace-definition
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/// unnamed-namespace-definition
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/// nested-namespace-definition
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///
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/// named-namespace-definition:
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/// 'inline'[opt] 'namespace' attributes[opt] identifier '{'
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/// namespace-body '}'
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///
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/// unnamed-namespace-definition:
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/// 'inline'[opt] 'namespace' attributes[opt] '{' namespace-body '}'
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///
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/// nested-namespace-definition:
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/// 'namespace' enclosing-namespace-specifier '::' 'inline'[opt]
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/// identifier '{' namespace-body '}'
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///
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/// enclosing-namespace-specifier:
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/// identifier
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/// enclosing-namespace-specifier '::' 'inline'[opt] identifier
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///
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/// namespace-alias-definition: [C++ 7.3.2: namespace.alias]
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/// 'namespace' identifier '=' qualified-namespace-specifier ';'
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///
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Parser::DeclGroupPtrTy Parser::ParseNamespace(DeclaratorContext Context,
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SourceLocation &DeclEnd,
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SourceLocation InlineLoc) {
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assert(Tok.is(tok::kw_namespace) && "Not a namespace!");
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SourceLocation NamespaceLoc = ConsumeToken(); // eat the 'namespace'.
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ObjCDeclContextSwitch ObjCDC(*this);
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if (Tok.is(tok::code_completion)) {
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Actions.CodeCompleteNamespaceDecl(getCurScope());
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cutOffParsing();
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return nullptr;
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}
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SourceLocation IdentLoc;
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IdentifierInfo *Ident = nullptr;
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InnerNamespaceInfoList ExtraNSs;
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SourceLocation FirstNestedInlineLoc;
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ParsedAttributesWithRange attrs(AttrFactory);
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SourceLocation attrLoc;
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if (getLangOpts().CPlusPlus11 && isCXX11AttributeSpecifier()) {
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Diag(Tok.getLocation(), getLangOpts().CPlusPlus17
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? diag::warn_cxx14_compat_ns_enum_attribute
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: diag::ext_ns_enum_attribute)
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<< 0 /*namespace*/;
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attrLoc = Tok.getLocation();
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ParseCXX11Attributes(attrs);
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}
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if (Tok.is(tok::identifier)) {
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Ident = Tok.getIdentifierInfo();
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IdentLoc = ConsumeToken(); // eat the identifier.
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while (Tok.is(tok::coloncolon) &&
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(NextToken().is(tok::identifier) ||
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(NextToken().is(tok::kw_inline) &&
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GetLookAheadToken(2).is(tok::identifier)))) {
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InnerNamespaceInfo Info;
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Info.NamespaceLoc = ConsumeToken();
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if (Tok.is(tok::kw_inline)) {
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Info.InlineLoc = ConsumeToken();
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if (FirstNestedInlineLoc.isInvalid())
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FirstNestedInlineLoc = Info.InlineLoc;
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}
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Info.Ident = Tok.getIdentifierInfo();
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Info.IdentLoc = ConsumeToken();
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ExtraNSs.push_back(Info);
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}
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}
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// A nested namespace definition cannot have attributes.
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if (!ExtraNSs.empty() && attrLoc.isValid())
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Diag(attrLoc, diag::err_unexpected_nested_namespace_attribute);
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// Read label attributes, if present.
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if (Tok.is(tok::kw___attribute)) {
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attrLoc = Tok.getLocation();
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ParseGNUAttributes(attrs);
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}
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if (Tok.is(tok::equal)) {
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if (!Ident) {
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Diag(Tok, diag::err_expected) << tok::identifier;
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// Skip to end of the definition and eat the ';'.
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SkipUntil(tok::semi);
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return nullptr;
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}
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if (attrLoc.isValid())
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Diag(attrLoc, diag::err_unexpected_namespace_attributes_alias);
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if (InlineLoc.isValid())
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Diag(InlineLoc, diag::err_inline_namespace_alias)
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<< FixItHint::CreateRemoval(InlineLoc);
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Decl *NSAlias = ParseNamespaceAlias(NamespaceLoc, IdentLoc, Ident, DeclEnd);
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return Actions.ConvertDeclToDeclGroup(NSAlias);
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}
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BalancedDelimiterTracker T(*this, tok::l_brace);
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if (T.consumeOpen()) {
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if (Ident)
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Diag(Tok, diag::err_expected) << tok::l_brace;
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else
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Diag(Tok, diag::err_expected_either) << tok::identifier << tok::l_brace;
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return nullptr;
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}
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if (getCurScope()->isClassScope() || getCurScope()->isTemplateParamScope() ||
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getCurScope()->isInObjcMethodScope() || getCurScope()->getBlockParent() ||
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getCurScope()->getFnParent()) {
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Diag(T.getOpenLocation(), diag::err_namespace_nonnamespace_scope);
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SkipUntil(tok::r_brace);
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return nullptr;
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}
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if (ExtraNSs.empty()) {
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// Normal namespace definition, not a nested-namespace-definition.
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} else if (InlineLoc.isValid()) {
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Diag(InlineLoc, diag::err_inline_nested_namespace_definition);
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} else if (getLangOpts().CPlusPlus20) {
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Diag(ExtraNSs[0].NamespaceLoc,
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diag::warn_cxx14_compat_nested_namespace_definition);
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if (FirstNestedInlineLoc.isValid())
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Diag(FirstNestedInlineLoc,
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diag::warn_cxx17_compat_inline_nested_namespace_definition);
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} else if (getLangOpts().CPlusPlus17) {
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Diag(ExtraNSs[0].NamespaceLoc,
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diag::warn_cxx14_compat_nested_namespace_definition);
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if (FirstNestedInlineLoc.isValid())
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Diag(FirstNestedInlineLoc, diag::ext_inline_nested_namespace_definition);
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} else {
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TentativeParsingAction TPA(*this);
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SkipUntil(tok::r_brace, StopBeforeMatch);
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Token rBraceToken = Tok;
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TPA.Revert();
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if (!rBraceToken.is(tok::r_brace)) {
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Diag(ExtraNSs[0].NamespaceLoc, diag::ext_nested_namespace_definition)
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<< SourceRange(ExtraNSs.front().NamespaceLoc,
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ExtraNSs.back().IdentLoc);
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} else {
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std::string NamespaceFix;
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for (const auto &ExtraNS : ExtraNSs) {
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NamespaceFix += " { ";
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if (ExtraNS.InlineLoc.isValid())
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NamespaceFix += "inline ";
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NamespaceFix += "namespace ";
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NamespaceFix += ExtraNS.Ident->getName();
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}
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std::string RBraces;
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for (unsigned i = 0, e = ExtraNSs.size(); i != e; ++i)
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RBraces += "} ";
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Diag(ExtraNSs[0].NamespaceLoc, diag::ext_nested_namespace_definition)
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<< FixItHint::CreateReplacement(
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SourceRange(ExtraNSs.front().NamespaceLoc,
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ExtraNSs.back().IdentLoc),
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NamespaceFix)
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<< FixItHint::CreateInsertion(rBraceToken.getLocation(), RBraces);
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}
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// Warn about nested inline namespaces.
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if (FirstNestedInlineLoc.isValid())
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Diag(FirstNestedInlineLoc, diag::ext_inline_nested_namespace_definition);
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}
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// If we're still good, complain about inline namespaces in non-C++0x now.
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if (InlineLoc.isValid())
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Diag(InlineLoc, getLangOpts().CPlusPlus11 ?
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diag::warn_cxx98_compat_inline_namespace : diag::ext_inline_namespace);
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// Enter a scope for the namespace.
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ParseScope NamespaceScope(this, Scope::DeclScope);
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UsingDirectiveDecl *ImplicitUsingDirectiveDecl = nullptr;
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Decl *NamespcDecl = Actions.ActOnStartNamespaceDef(
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getCurScope(), InlineLoc, NamespaceLoc, IdentLoc, Ident,
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T.getOpenLocation(), attrs, ImplicitUsingDirectiveDecl);
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PrettyDeclStackTraceEntry CrashInfo(Actions.Context, NamespcDecl,
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NamespaceLoc, "parsing namespace");
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// Parse the contents of the namespace. This includes parsing recovery on
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// any improperly nested namespaces.
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ParseInnerNamespace(ExtraNSs, 0, InlineLoc, attrs, T);
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// Leave the namespace scope.
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NamespaceScope.Exit();
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DeclEnd = T.getCloseLocation();
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Actions.ActOnFinishNamespaceDef(NamespcDecl, DeclEnd);
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return Actions.ConvertDeclToDeclGroup(NamespcDecl,
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ImplicitUsingDirectiveDecl);
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}
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/// ParseInnerNamespace - Parse the contents of a namespace.
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void Parser::ParseInnerNamespace(const InnerNamespaceInfoList &InnerNSs,
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unsigned int index, SourceLocation &InlineLoc,
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ParsedAttributes &attrs,
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BalancedDelimiterTracker &Tracker) {
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if (index == InnerNSs.size()) {
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while (!tryParseMisplacedModuleImport() && Tok.isNot(tok::r_brace) &&
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Tok.isNot(tok::eof)) {
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ParsedAttributesWithRange attrs(AttrFactory);
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MaybeParseCXX11Attributes(attrs);
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ParseExternalDeclaration(attrs);
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}
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// The caller is what called check -- we are simply calling
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// the close for it.
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Tracker.consumeClose();
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return;
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}
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// Handle a nested namespace definition.
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// FIXME: Preserve the source information through to the AST rather than
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// desugaring it here.
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ParseScope NamespaceScope(this, Scope::DeclScope);
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UsingDirectiveDecl *ImplicitUsingDirectiveDecl = nullptr;
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Decl *NamespcDecl = Actions.ActOnStartNamespaceDef(
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getCurScope(), InnerNSs[index].InlineLoc, InnerNSs[index].NamespaceLoc,
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InnerNSs[index].IdentLoc, InnerNSs[index].Ident,
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Tracker.getOpenLocation(), attrs, ImplicitUsingDirectiveDecl);
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assert(!ImplicitUsingDirectiveDecl &&
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"nested namespace definition cannot define anonymous namespace");
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ParseInnerNamespace(InnerNSs, ++index, InlineLoc, attrs, Tracker);
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NamespaceScope.Exit();
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Actions.ActOnFinishNamespaceDef(NamespcDecl, Tracker.getCloseLocation());
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}
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/// ParseNamespaceAlias - Parse the part after the '=' in a namespace
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/// alias definition.
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///
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Decl *Parser::ParseNamespaceAlias(SourceLocation NamespaceLoc,
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SourceLocation AliasLoc,
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IdentifierInfo *Alias,
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SourceLocation &DeclEnd) {
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assert(Tok.is(tok::equal) && "Not equal token");
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ConsumeToken(); // eat the '='.
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if (Tok.is(tok::code_completion)) {
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Actions.CodeCompleteNamespaceAliasDecl(getCurScope());
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cutOffParsing();
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return nullptr;
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}
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CXXScopeSpec SS;
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// Parse (optional) nested-name-specifier.
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ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/nullptr,
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/*ObjectHadErrors=*/false,
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/*EnteringContext=*/false,
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/*MayBePseudoDestructor=*/nullptr,
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/*IsTypename=*/false,
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/*LastII=*/nullptr,
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/*OnlyNamespace=*/true);
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if (Tok.isNot(tok::identifier)) {
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Diag(Tok, diag::err_expected_namespace_name);
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// Skip to end of the definition and eat the ';'.
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SkipUntil(tok::semi);
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return nullptr;
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}
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if (SS.isInvalid()) {
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// Diagnostics have been emitted in ParseOptionalCXXScopeSpecifier.
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// Skip to end of the definition and eat the ';'.
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SkipUntil(tok::semi);
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return nullptr;
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}
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// Parse identifier.
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IdentifierInfo *Ident = Tok.getIdentifierInfo();
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SourceLocation IdentLoc = ConsumeToken();
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// Eat the ';'.
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DeclEnd = Tok.getLocation();
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if (ExpectAndConsume(tok::semi, diag::err_expected_semi_after_namespace_name))
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SkipUntil(tok::semi);
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return Actions.ActOnNamespaceAliasDef(getCurScope(), NamespaceLoc, AliasLoc,
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Alias, SS, IdentLoc, Ident);
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}
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/// ParseLinkage - We know that the current token is a string_literal
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/// and just before that, that extern was seen.
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///
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/// linkage-specification: [C++ 7.5p2: dcl.link]
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/// 'extern' string-literal '{' declaration-seq[opt] '}'
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/// 'extern' string-literal declaration
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///
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Decl *Parser::ParseLinkage(ParsingDeclSpec &DS, DeclaratorContext Context) {
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assert(isTokenStringLiteral() && "Not a string literal!");
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ExprResult Lang = ParseStringLiteralExpression(false);
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ParseScope LinkageScope(this, Scope::DeclScope);
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Decl *LinkageSpec =
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Lang.isInvalid()
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? nullptr
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: Actions.ActOnStartLinkageSpecification(
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getCurScope(), DS.getSourceRange().getBegin(), Lang.get(),
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Tok.is(tok::l_brace) ? Tok.getLocation() : SourceLocation());
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ParsedAttributesWithRange attrs(AttrFactory);
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MaybeParseCXX11Attributes(attrs);
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if (Tok.isNot(tok::l_brace)) {
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// Reset the source range in DS, as the leading "extern"
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// does not really belong to the inner declaration ...
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DS.SetRangeStart(SourceLocation());
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DS.SetRangeEnd(SourceLocation());
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// ... but anyway remember that such an "extern" was seen.
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DS.setExternInLinkageSpec(true);
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ParseExternalDeclaration(attrs, &DS);
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return LinkageSpec ? Actions.ActOnFinishLinkageSpecification(
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getCurScope(), LinkageSpec, SourceLocation())
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: nullptr;
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}
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DS.abort();
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ProhibitAttributes(attrs);
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BalancedDelimiterTracker T(*this, tok::l_brace);
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T.consumeOpen();
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unsigned NestedModules = 0;
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while (true) {
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switch (Tok.getKind()) {
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case tok::annot_module_begin:
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++NestedModules;
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ParseTopLevelDecl();
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continue;
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case tok::annot_module_end:
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if (!NestedModules)
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break;
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--NestedModules;
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ParseTopLevelDecl();
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continue;
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case tok::annot_module_include:
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ParseTopLevelDecl();
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continue;
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case tok::eof:
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break;
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case tok::r_brace:
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if (!NestedModules)
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break;
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LLVM_FALLTHROUGH;
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default:
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ParsedAttributesWithRange attrs(AttrFactory);
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MaybeParseCXX11Attributes(attrs);
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ParseExternalDeclaration(attrs);
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continue;
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}
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break;
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}
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T.consumeClose();
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return LinkageSpec ? Actions.ActOnFinishLinkageSpecification(
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getCurScope(), LinkageSpec, T.getCloseLocation())
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: nullptr;
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}
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/// Parse a C++ Modules TS export-declaration.
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///
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/// export-declaration:
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/// 'export' declaration
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/// 'export' '{' declaration-seq[opt] '}'
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///
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Decl *Parser::ParseExportDeclaration() {
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assert(Tok.is(tok::kw_export));
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SourceLocation ExportLoc = ConsumeToken();
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ParseScope ExportScope(this, Scope::DeclScope);
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Decl *ExportDecl = Actions.ActOnStartExportDecl(
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getCurScope(), ExportLoc,
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Tok.is(tok::l_brace) ? Tok.getLocation() : SourceLocation());
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if (Tok.isNot(tok::l_brace)) {
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// FIXME: Factor out a ParseExternalDeclarationWithAttrs.
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ParsedAttributesWithRange Attrs(AttrFactory);
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MaybeParseCXX11Attributes(Attrs);
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MaybeParseMicrosoftAttributes(Attrs);
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ParseExternalDeclaration(Attrs);
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return Actions.ActOnFinishExportDecl(getCurScope(), ExportDecl,
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SourceLocation());
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}
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BalancedDelimiterTracker T(*this, tok::l_brace);
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T.consumeOpen();
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// The Modules TS draft says "An export-declaration shall declare at least one
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// entity", but the intent is that it shall contain at least one declaration.
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if (Tok.is(tok::r_brace) && getLangOpts().ModulesTS) {
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Diag(ExportLoc, diag::err_export_empty)
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<< SourceRange(ExportLoc, Tok.getLocation());
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}
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while (!tryParseMisplacedModuleImport() && Tok.isNot(tok::r_brace) &&
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Tok.isNot(tok::eof)) {
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ParsedAttributesWithRange Attrs(AttrFactory);
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MaybeParseCXX11Attributes(Attrs);
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MaybeParseMicrosoftAttributes(Attrs);
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ParseExternalDeclaration(Attrs);
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}
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T.consumeClose();
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return Actions.ActOnFinishExportDecl(getCurScope(), ExportDecl,
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T.getCloseLocation());
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}
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|
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/// ParseUsingDirectiveOrDeclaration - Parse C++ using using-declaration or
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/// using-directive. Assumes that current token is 'using'.
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Parser::DeclGroupPtrTy
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Parser::ParseUsingDirectiveOrDeclaration(DeclaratorContext Context,
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const ParsedTemplateInfo &TemplateInfo,
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SourceLocation &DeclEnd,
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ParsedAttributesWithRange &attrs) {
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assert(Tok.is(tok::kw_using) && "Not using token");
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ObjCDeclContextSwitch ObjCDC(*this);
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|
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// Eat 'using'.
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SourceLocation UsingLoc = ConsumeToken();
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if (Tok.is(tok::code_completion)) {
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Actions.CodeCompleteUsing(getCurScope());
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cutOffParsing();
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return nullptr;
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}
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|
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// Consume unexpected 'template' keywords.
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while (Tok.is(tok::kw_template)) {
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SourceLocation TemplateLoc = ConsumeToken();
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Diag(TemplateLoc, diag::err_unexpected_template_after_using)
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<< FixItHint::CreateRemoval(TemplateLoc);
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}
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// 'using namespace' means this is a using-directive.
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if (Tok.is(tok::kw_namespace)) {
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// Template parameters are always an error here.
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if (TemplateInfo.Kind) {
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SourceRange R = TemplateInfo.getSourceRange();
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Diag(UsingLoc, diag::err_templated_using_directive_declaration)
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<< 0 /* directive */ << R << FixItHint::CreateRemoval(R);
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}
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Decl *UsingDir = ParseUsingDirective(Context, UsingLoc, DeclEnd, attrs);
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return Actions.ConvertDeclToDeclGroup(UsingDir);
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}
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|
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// Otherwise, it must be a using-declaration or an alias-declaration.
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|
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// Using declarations can't have attributes.
|
|
ProhibitAttributes(attrs);
|
|
|
|
return ParseUsingDeclaration(Context, TemplateInfo, UsingLoc, DeclEnd,
|
|
AS_none);
|
|
}
|
|
|
|
/// ParseUsingDirective - Parse C++ using-directive, assumes
|
|
/// that current token is 'namespace' and 'using' was already parsed.
|
|
///
|
|
/// using-directive: [C++ 7.3.p4: namespace.udir]
|
|
/// 'using' 'namespace' ::[opt] nested-name-specifier[opt]
|
|
/// namespace-name ;
|
|
/// [GNU] using-directive:
|
|
/// 'using' 'namespace' ::[opt] nested-name-specifier[opt]
|
|
/// namespace-name attributes[opt] ;
|
|
///
|
|
Decl *Parser::ParseUsingDirective(DeclaratorContext Context,
|
|
SourceLocation UsingLoc,
|
|
SourceLocation &DeclEnd,
|
|
ParsedAttributes &attrs) {
|
|
assert(Tok.is(tok::kw_namespace) && "Not 'namespace' token");
|
|
|
|
// Eat 'namespace'.
|
|
SourceLocation NamespcLoc = ConsumeToken();
|
|
|
|
if (Tok.is(tok::code_completion)) {
|
|
Actions.CodeCompleteUsingDirective(getCurScope());
|
|
cutOffParsing();
|
|
return nullptr;
|
|
}
|
|
|
|
CXXScopeSpec SS;
|
|
// Parse (optional) nested-name-specifier.
|
|
ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/nullptr,
|
|
/*ObjectHadErrors=*/false,
|
|
/*EnteringContext=*/false,
|
|
/*MayBePseudoDestructor=*/nullptr,
|
|
/*IsTypename=*/false,
|
|
/*LastII=*/nullptr,
|
|
/*OnlyNamespace=*/true);
|
|
|
|
IdentifierInfo *NamespcName = nullptr;
|
|
SourceLocation IdentLoc = SourceLocation();
|
|
|
|
// Parse namespace-name.
|
|
if (Tok.isNot(tok::identifier)) {
|
|
Diag(Tok, diag::err_expected_namespace_name);
|
|
// If there was invalid namespace name, skip to end of decl, and eat ';'.
|
|
SkipUntil(tok::semi);
|
|
// FIXME: Are there cases, when we would like to call ActOnUsingDirective?
|
|
return nullptr;
|
|
}
|
|
|
|
if (SS.isInvalid()) {
|
|
// Diagnostics have been emitted in ParseOptionalCXXScopeSpecifier.
|
|
// Skip to end of the definition and eat the ';'.
|
|
SkipUntil(tok::semi);
|
|
return nullptr;
|
|
}
|
|
|
|
// Parse identifier.
|
|
NamespcName = Tok.getIdentifierInfo();
|
|
IdentLoc = ConsumeToken();
|
|
|
|
// Parse (optional) attributes (most likely GNU strong-using extension).
|
|
bool GNUAttr = false;
|
|
if (Tok.is(tok::kw___attribute)) {
|
|
GNUAttr = true;
|
|
ParseGNUAttributes(attrs);
|
|
}
|
|
|
|
// Eat ';'.
|
|
DeclEnd = Tok.getLocation();
|
|
if (ExpectAndConsume(tok::semi,
|
|
GNUAttr ? diag::err_expected_semi_after_attribute_list
|
|
: diag::err_expected_semi_after_namespace_name))
|
|
SkipUntil(tok::semi);
|
|
|
|
return Actions.ActOnUsingDirective(getCurScope(), UsingLoc, NamespcLoc, SS,
|
|
IdentLoc, NamespcName, attrs);
|
|
}
|
|
|
|
/// Parse a using-declarator (or the identifier in a C++11 alias-declaration).
|
|
///
|
|
/// using-declarator:
|
|
/// 'typename'[opt] nested-name-specifier unqualified-id
|
|
///
|
|
bool Parser::ParseUsingDeclarator(DeclaratorContext Context,
|
|
UsingDeclarator &D) {
|
|
D.clear();
|
|
|
|
// Ignore optional 'typename'.
|
|
// FIXME: This is wrong; we should parse this as a typename-specifier.
|
|
TryConsumeToken(tok::kw_typename, D.TypenameLoc);
|
|
|
|
if (Tok.is(tok::kw___super)) {
|
|
Diag(Tok.getLocation(), diag::err_super_in_using_declaration);
|
|
return true;
|
|
}
|
|
|
|
// Parse nested-name-specifier.
|
|
IdentifierInfo *LastII = nullptr;
|
|
if (ParseOptionalCXXScopeSpecifier(D.SS, /*ObjectType=*/nullptr,
|
|
/*ObjectHadErrors=*/false,
|
|
/*EnteringContext=*/false,
|
|
/*MayBePseudoDtor=*/nullptr,
|
|
/*IsTypename=*/false,
|
|
/*LastII=*/&LastII,
|
|
/*OnlyNamespace=*/false,
|
|
/*InUsingDeclaration=*/true))
|
|
|
|
return true;
|
|
if (D.SS.isInvalid())
|
|
return true;
|
|
|
|
// Parse the unqualified-id. We allow parsing of both constructor and
|
|
// destructor names and allow the action module to diagnose any semantic
|
|
// errors.
|
|
//
|
|
// C++11 [class.qual]p2:
|
|
// [...] in a using-declaration that is a member-declaration, if the name
|
|
// specified after the nested-name-specifier is the same as the identifier
|
|
// or the simple-template-id's template-name in the last component of the
|
|
// nested-name-specifier, the name is [...] considered to name the
|
|
// constructor.
|
|
if (getLangOpts().CPlusPlus11 && Context == DeclaratorContext::Member &&
|
|
Tok.is(tok::identifier) &&
|
|
(NextToken().is(tok::semi) || NextToken().is(tok::comma) ||
|
|
NextToken().is(tok::ellipsis)) &&
|
|
D.SS.isNotEmpty() && LastII == Tok.getIdentifierInfo() &&
|
|
!D.SS.getScopeRep()->getAsNamespace() &&
|
|
!D.SS.getScopeRep()->getAsNamespaceAlias()) {
|
|
SourceLocation IdLoc = ConsumeToken();
|
|
ParsedType Type =
|
|
Actions.getInheritingConstructorName(D.SS, IdLoc, *LastII);
|
|
D.Name.setConstructorName(Type, IdLoc, IdLoc);
|
|
} else {
|
|
if (ParseUnqualifiedId(
|
|
D.SS, /*ObjectType=*/nullptr,
|
|
/*ObjectHadErrors=*/false, /*EnteringContext=*/false,
|
|
/*AllowDestructorName=*/true,
|
|
/*AllowConstructorName=*/
|
|
!(Tok.is(tok::identifier) && NextToken().is(tok::equal)),
|
|
/*AllowDeductionGuide=*/false, nullptr, D.Name))
|
|
return true;
|
|
}
|
|
|
|
if (TryConsumeToken(tok::ellipsis, D.EllipsisLoc))
|
|
Diag(Tok.getLocation(), getLangOpts().CPlusPlus17 ?
|
|
diag::warn_cxx17_compat_using_declaration_pack :
|
|
diag::ext_using_declaration_pack);
|
|
|
|
return false;
|
|
}
|
|
|
|
/// ParseUsingDeclaration - Parse C++ using-declaration or alias-declaration.
|
|
/// Assumes that 'using' was already seen.
|
|
///
|
|
/// using-declaration: [C++ 7.3.p3: namespace.udecl]
|
|
/// 'using' using-declarator-list[opt] ;
|
|
///
|
|
/// using-declarator-list: [C++1z]
|
|
/// using-declarator '...'[opt]
|
|
/// using-declarator-list ',' using-declarator '...'[opt]
|
|
///
|
|
/// using-declarator-list: [C++98-14]
|
|
/// using-declarator
|
|
///
|
|
/// alias-declaration: C++11 [dcl.dcl]p1
|
|
/// 'using' identifier attribute-specifier-seq[opt] = type-id ;
|
|
///
|
|
Parser::DeclGroupPtrTy
|
|
Parser::ParseUsingDeclaration(DeclaratorContext Context,
|
|
const ParsedTemplateInfo &TemplateInfo,
|
|
SourceLocation UsingLoc, SourceLocation &DeclEnd,
|
|
AccessSpecifier AS) {
|
|
// Check for misplaced attributes before the identifier in an
|
|
// alias-declaration.
|
|
ParsedAttributesWithRange MisplacedAttrs(AttrFactory);
|
|
MaybeParseCXX11Attributes(MisplacedAttrs);
|
|
|
|
UsingDeclarator D;
|
|
bool InvalidDeclarator = ParseUsingDeclarator(Context, D);
|
|
|
|
ParsedAttributesWithRange Attrs(AttrFactory);
|
|
MaybeParseGNUAttributes(Attrs);
|
|
MaybeParseCXX11Attributes(Attrs);
|
|
|
|
// Maybe this is an alias-declaration.
|
|
if (Tok.is(tok::equal)) {
|
|
if (InvalidDeclarator) {
|
|
SkipUntil(tok::semi);
|
|
return nullptr;
|
|
}
|
|
|
|
// If we had any misplaced attributes from earlier, this is where they
|
|
// should have been written.
|
|
if (MisplacedAttrs.Range.isValid()) {
|
|
Diag(MisplacedAttrs.Range.getBegin(), diag::err_attributes_not_allowed)
|
|
<< FixItHint::CreateInsertionFromRange(
|
|
Tok.getLocation(),
|
|
CharSourceRange::getTokenRange(MisplacedAttrs.Range))
|
|
<< FixItHint::CreateRemoval(MisplacedAttrs.Range);
|
|
Attrs.takeAllFrom(MisplacedAttrs);
|
|
}
|
|
|
|
Decl *DeclFromDeclSpec = nullptr;
|
|
Decl *AD = ParseAliasDeclarationAfterDeclarator(
|
|
TemplateInfo, UsingLoc, D, DeclEnd, AS, Attrs, &DeclFromDeclSpec);
|
|
return Actions.ConvertDeclToDeclGroup(AD, DeclFromDeclSpec);
|
|
}
|
|
|
|
// C++11 attributes are not allowed on a using-declaration, but GNU ones
|
|
// are.
|
|
ProhibitAttributes(MisplacedAttrs);
|
|
ProhibitAttributes(Attrs);
|
|
|
|
// Diagnose an attempt to declare a templated using-declaration.
|
|
// In C++11, alias-declarations can be templates:
|
|
// template <...> using id = type;
|
|
if (TemplateInfo.Kind) {
|
|
SourceRange R = TemplateInfo.getSourceRange();
|
|
Diag(UsingLoc, diag::err_templated_using_directive_declaration)
|
|
<< 1 /* declaration */ << R << FixItHint::CreateRemoval(R);
|
|
|
|
// Unfortunately, we have to bail out instead of recovering by
|
|
// ignoring the parameters, just in case the nested name specifier
|
|
// depends on the parameters.
|
|
return nullptr;
|
|
}
|
|
|
|
SmallVector<Decl *, 8> DeclsInGroup;
|
|
while (true) {
|
|
// Parse (optional) attributes (most likely GNU strong-using extension).
|
|
MaybeParseGNUAttributes(Attrs);
|
|
|
|
if (InvalidDeclarator)
|
|
SkipUntil(tok::comma, tok::semi, StopBeforeMatch);
|
|
else {
|
|
// "typename" keyword is allowed for identifiers only,
|
|
// because it may be a type definition.
|
|
if (D.TypenameLoc.isValid() &&
|
|
D.Name.getKind() != UnqualifiedIdKind::IK_Identifier) {
|
|
Diag(D.Name.getSourceRange().getBegin(),
|
|
diag::err_typename_identifiers_only)
|
|
<< FixItHint::CreateRemoval(SourceRange(D.TypenameLoc));
|
|
// Proceed parsing, but discard the typename keyword.
|
|
D.TypenameLoc = SourceLocation();
|
|
}
|
|
|
|
Decl *UD = Actions.ActOnUsingDeclaration(getCurScope(), AS, UsingLoc,
|
|
D.TypenameLoc, D.SS, D.Name,
|
|
D.EllipsisLoc, Attrs);
|
|
if (UD)
|
|
DeclsInGroup.push_back(UD);
|
|
}
|
|
|
|
if (!TryConsumeToken(tok::comma))
|
|
break;
|
|
|
|
// Parse another using-declarator.
|
|
Attrs.clear();
|
|
InvalidDeclarator = ParseUsingDeclarator(Context, D);
|
|
}
|
|
|
|
if (DeclsInGroup.size() > 1)
|
|
Diag(Tok.getLocation(), getLangOpts().CPlusPlus17 ?
|
|
diag::warn_cxx17_compat_multi_using_declaration :
|
|
diag::ext_multi_using_declaration);
|
|
|
|
// Eat ';'.
|
|
DeclEnd = Tok.getLocation();
|
|
if (ExpectAndConsume(tok::semi, diag::err_expected_after,
|
|
!Attrs.empty() ? "attributes list"
|
|
: "using declaration"))
|
|
SkipUntil(tok::semi);
|
|
|
|
return Actions.BuildDeclaratorGroup(DeclsInGroup);
|
|
}
|
|
|
|
Decl *Parser::ParseAliasDeclarationAfterDeclarator(
|
|
const ParsedTemplateInfo &TemplateInfo, SourceLocation UsingLoc,
|
|
UsingDeclarator &D, SourceLocation &DeclEnd, AccessSpecifier AS,
|
|
ParsedAttributes &Attrs, Decl **OwnedType) {
|
|
if (ExpectAndConsume(tok::equal)) {
|
|
SkipUntil(tok::semi);
|
|
return nullptr;
|
|
}
|
|
|
|
Diag(Tok.getLocation(), getLangOpts().CPlusPlus11 ?
|
|
diag::warn_cxx98_compat_alias_declaration :
|
|
diag::ext_alias_declaration);
|
|
|
|
// Type alias templates cannot be specialized.
|
|
int SpecKind = -1;
|
|
if (TemplateInfo.Kind == ParsedTemplateInfo::Template &&
|
|
D.Name.getKind() == UnqualifiedIdKind::IK_TemplateId)
|
|
SpecKind = 0;
|
|
if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitSpecialization)
|
|
SpecKind = 1;
|
|
if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation)
|
|
SpecKind = 2;
|
|
if (SpecKind != -1) {
|
|
SourceRange Range;
|
|
if (SpecKind == 0)
|
|
Range = SourceRange(D.Name.TemplateId->LAngleLoc,
|
|
D.Name.TemplateId->RAngleLoc);
|
|
else
|
|
Range = TemplateInfo.getSourceRange();
|
|
Diag(Range.getBegin(), diag::err_alias_declaration_specialization)
|
|
<< SpecKind << Range;
|
|
SkipUntil(tok::semi);
|
|
return nullptr;
|
|
}
|
|
|
|
// Name must be an identifier.
|
|
if (D.Name.getKind() != UnqualifiedIdKind::IK_Identifier) {
|
|
Diag(D.Name.StartLocation, diag::err_alias_declaration_not_identifier);
|
|
// No removal fixit: can't recover from this.
|
|
SkipUntil(tok::semi);
|
|
return nullptr;
|
|
} else if (D.TypenameLoc.isValid())
|
|
Diag(D.TypenameLoc, diag::err_alias_declaration_not_identifier)
|
|
<< FixItHint::CreateRemoval(SourceRange(
|
|
D.TypenameLoc,
|
|
D.SS.isNotEmpty() ? D.SS.getEndLoc() : D.TypenameLoc));
|
|
else if (D.SS.isNotEmpty())
|
|
Diag(D.SS.getBeginLoc(), diag::err_alias_declaration_not_identifier)
|
|
<< FixItHint::CreateRemoval(D.SS.getRange());
|
|
if (D.EllipsisLoc.isValid())
|
|
Diag(D.EllipsisLoc, diag::err_alias_declaration_pack_expansion)
|
|
<< FixItHint::CreateRemoval(SourceRange(D.EllipsisLoc));
|
|
|
|
Decl *DeclFromDeclSpec = nullptr;
|
|
TypeResult TypeAlias =
|
|
ParseTypeName(nullptr,
|
|
TemplateInfo.Kind ? DeclaratorContext::AliasTemplate
|
|
: DeclaratorContext::AliasDecl,
|
|
AS, &DeclFromDeclSpec, &Attrs);
|
|
if (OwnedType)
|
|
*OwnedType = DeclFromDeclSpec;
|
|
|
|
// Eat ';'.
|
|
DeclEnd = Tok.getLocation();
|
|
if (ExpectAndConsume(tok::semi, diag::err_expected_after,
|
|
!Attrs.empty() ? "attributes list"
|
|
: "alias declaration"))
|
|
SkipUntil(tok::semi);
|
|
|
|
TemplateParameterLists *TemplateParams = TemplateInfo.TemplateParams;
|
|
MultiTemplateParamsArg TemplateParamsArg(
|
|
TemplateParams ? TemplateParams->data() : nullptr,
|
|
TemplateParams ? TemplateParams->size() : 0);
|
|
return Actions.ActOnAliasDeclaration(getCurScope(), AS, TemplateParamsArg,
|
|
UsingLoc, D.Name, Attrs, TypeAlias,
|
|
DeclFromDeclSpec);
|
|
}
|
|
|
|
/// ParseStaticAssertDeclaration - Parse C++0x or C11 static_assert-declaration.
|
|
///
|
|
/// [C++0x] static_assert-declaration:
|
|
/// static_assert ( constant-expression , string-literal ) ;
|
|
///
|
|
/// [C11] static_assert-declaration:
|
|
/// _Static_assert ( constant-expression , string-literal ) ;
|
|
///
|
|
Decl *Parser::ParseStaticAssertDeclaration(SourceLocation &DeclEnd){
|
|
assert(Tok.isOneOf(tok::kw_static_assert, tok::kw__Static_assert) &&
|
|
"Not a static_assert declaration");
|
|
|
|
if (Tok.is(tok::kw__Static_assert) && !getLangOpts().C11)
|
|
Diag(Tok, diag::ext_c11_feature) << Tok.getName();
|
|
if (Tok.is(tok::kw_static_assert))
|
|
Diag(Tok, diag::warn_cxx98_compat_static_assert);
|
|
|
|
SourceLocation StaticAssertLoc = ConsumeToken();
|
|
|
|
BalancedDelimiterTracker T(*this, tok::l_paren);
|
|
if (T.consumeOpen()) {
|
|
Diag(Tok, diag::err_expected) << tok::l_paren;
|
|
SkipMalformedDecl();
|
|
return nullptr;
|
|
}
|
|
|
|
EnterExpressionEvaluationContext ConstantEvaluated(
|
|
Actions, Sema::ExpressionEvaluationContext::ConstantEvaluated);
|
|
ExprResult AssertExpr(ParseConstantExpressionInExprEvalContext());
|
|
if (AssertExpr.isInvalid()) {
|
|
SkipMalformedDecl();
|
|
return nullptr;
|
|
}
|
|
|
|
ExprResult AssertMessage;
|
|
if (Tok.is(tok::r_paren)) {
|
|
Diag(Tok, getLangOpts().CPlusPlus17
|
|
? diag::warn_cxx14_compat_static_assert_no_message
|
|
: diag::ext_static_assert_no_message)
|
|
<< (getLangOpts().CPlusPlus17
|
|
? FixItHint()
|
|
: FixItHint::CreateInsertion(Tok.getLocation(), ", \"\""));
|
|
} else {
|
|
if (ExpectAndConsume(tok::comma)) {
|
|
SkipUntil(tok::semi);
|
|
return nullptr;
|
|
}
|
|
|
|
if (!isTokenStringLiteral()) {
|
|
Diag(Tok, diag::err_expected_string_literal)
|
|
<< /*Source='static_assert'*/1;
|
|
SkipMalformedDecl();
|
|
return nullptr;
|
|
}
|
|
|
|
AssertMessage = ParseStringLiteralExpression();
|
|
if (AssertMessage.isInvalid()) {
|
|
SkipMalformedDecl();
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
T.consumeClose();
|
|
|
|
DeclEnd = Tok.getLocation();
|
|
ExpectAndConsumeSemi(diag::err_expected_semi_after_static_assert);
|
|
|
|
return Actions.ActOnStaticAssertDeclaration(StaticAssertLoc,
|
|
AssertExpr.get(),
|
|
AssertMessage.get(),
|
|
T.getCloseLocation());
|
|
}
|
|
|
|
/// ParseDecltypeSpecifier - Parse a C++11 decltype specifier.
|
|
///
|
|
/// 'decltype' ( expression )
|
|
/// 'decltype' ( 'auto' ) [C++1y]
|
|
///
|
|
SourceLocation Parser::ParseDecltypeSpecifier(DeclSpec &DS) {
|
|
assert(Tok.isOneOf(tok::kw_decltype, tok::annot_decltype)
|
|
&& "Not a decltype specifier");
|
|
|
|
ExprResult Result;
|
|
SourceLocation StartLoc = Tok.getLocation();
|
|
SourceLocation EndLoc;
|
|
|
|
if (Tok.is(tok::annot_decltype)) {
|
|
Result = getExprAnnotation(Tok);
|
|
EndLoc = Tok.getAnnotationEndLoc();
|
|
ConsumeAnnotationToken();
|
|
if (Result.isInvalid()) {
|
|
DS.SetTypeSpecError();
|
|
return EndLoc;
|
|
}
|
|
} else {
|
|
if (Tok.getIdentifierInfo()->isStr("decltype"))
|
|
Diag(Tok, diag::warn_cxx98_compat_decltype);
|
|
|
|
ConsumeToken();
|
|
|
|
BalancedDelimiterTracker T(*this, tok::l_paren);
|
|
if (T.expectAndConsume(diag::err_expected_lparen_after,
|
|
"decltype", tok::r_paren)) {
|
|
DS.SetTypeSpecError();
|
|
return T.getOpenLocation() == Tok.getLocation() ?
|
|
StartLoc : T.getOpenLocation();
|
|
}
|
|
|
|
// Check for C++1y 'decltype(auto)'.
|
|
if (Tok.is(tok::kw_auto)) {
|
|
// No need to disambiguate here: an expression can't start with 'auto',
|
|
// because the typename-specifier in a function-style cast operation can't
|
|
// be 'auto'.
|
|
Diag(Tok.getLocation(),
|
|
getLangOpts().CPlusPlus14
|
|
? diag::warn_cxx11_compat_decltype_auto_type_specifier
|
|
: diag::ext_decltype_auto_type_specifier);
|
|
ConsumeToken();
|
|
} else {
|
|
// Parse the expression
|
|
|
|
// C++11 [dcl.type.simple]p4:
|
|
// The operand of the decltype specifier is an unevaluated operand.
|
|
EnterExpressionEvaluationContext Unevaluated(
|
|
Actions, Sema::ExpressionEvaluationContext::Unevaluated, nullptr,
|
|
Sema::ExpressionEvaluationContextRecord::EK_Decltype);
|
|
Result = Actions.CorrectDelayedTyposInExpr(
|
|
ParseExpression(), /*InitDecl=*/nullptr,
|
|
/*RecoverUncorrectedTypos=*/false,
|
|
[](Expr *E) { return E->hasPlaceholderType() ? ExprError() : E; });
|
|
if (Result.isInvalid()) {
|
|
DS.SetTypeSpecError();
|
|
if (SkipUntil(tok::r_paren, StopAtSemi | StopBeforeMatch)) {
|
|
EndLoc = ConsumeParen();
|
|
} else {
|
|
if (PP.isBacktrackEnabled() && Tok.is(tok::semi)) {
|
|
// Backtrack to get the location of the last token before the semi.
|
|
PP.RevertCachedTokens(2);
|
|
ConsumeToken(); // the semi.
|
|
EndLoc = ConsumeAnyToken();
|
|
assert(Tok.is(tok::semi));
|
|
} else {
|
|
EndLoc = Tok.getLocation();
|
|
}
|
|
}
|
|
return EndLoc;
|
|
}
|
|
|
|
Result = Actions.ActOnDecltypeExpression(Result.get());
|
|
}
|
|
|
|
// Match the ')'
|
|
T.consumeClose();
|
|
if (T.getCloseLocation().isInvalid()) {
|
|
DS.SetTypeSpecError();
|
|
// FIXME: this should return the location of the last token
|
|
// that was consumed (by "consumeClose()")
|
|
return T.getCloseLocation();
|
|
}
|
|
|
|
if (Result.isInvalid()) {
|
|
DS.SetTypeSpecError();
|
|
return T.getCloseLocation();
|
|
}
|
|
|
|
EndLoc = T.getCloseLocation();
|
|
}
|
|
assert(!Result.isInvalid());
|
|
|
|
const char *PrevSpec = nullptr;
|
|
unsigned DiagID;
|
|
const PrintingPolicy &Policy = Actions.getASTContext().getPrintingPolicy();
|
|
// Check for duplicate type specifiers (e.g. "int decltype(a)").
|
|
if (Result.get()
|
|
? DS.SetTypeSpecType(DeclSpec::TST_decltype, StartLoc, PrevSpec,
|
|
DiagID, Result.get(), Policy)
|
|
: DS.SetTypeSpecType(DeclSpec::TST_decltype_auto, StartLoc, PrevSpec,
|
|
DiagID, Policy)) {
|
|
Diag(StartLoc, DiagID) << PrevSpec;
|
|
DS.SetTypeSpecError();
|
|
}
|
|
return EndLoc;
|
|
}
|
|
|
|
void Parser::AnnotateExistingDecltypeSpecifier(const DeclSpec& DS,
|
|
SourceLocation StartLoc,
|
|
SourceLocation EndLoc) {
|
|
// make sure we have a token we can turn into an annotation token
|
|
if (PP.isBacktrackEnabled()) {
|
|
PP.RevertCachedTokens(1);
|
|
if (DS.getTypeSpecType() == TST_error) {
|
|
// We encountered an error in parsing 'decltype(...)' so lets annotate all
|
|
// the tokens in the backtracking cache - that we likely had to skip over
|
|
// to get to a token that allows us to resume parsing, such as a
|
|
// semi-colon.
|
|
EndLoc = PP.getLastCachedTokenLocation();
|
|
}
|
|
}
|
|
else
|
|
PP.EnterToken(Tok, /*IsReinject*/true);
|
|
|
|
Tok.setKind(tok::annot_decltype);
|
|
setExprAnnotation(Tok,
|
|
DS.getTypeSpecType() == TST_decltype ? DS.getRepAsExpr() :
|
|
DS.getTypeSpecType() == TST_decltype_auto ? ExprResult() :
|
|
ExprError());
|
|
Tok.setAnnotationEndLoc(EndLoc);
|
|
Tok.setLocation(StartLoc);
|
|
PP.AnnotateCachedTokens(Tok);
|
|
}
|
|
|
|
void Parser::ParseUnderlyingTypeSpecifier(DeclSpec &DS) {
|
|
assert(Tok.is(tok::kw___underlying_type) &&
|
|
"Not an underlying type specifier");
|
|
|
|
SourceLocation StartLoc = ConsumeToken();
|
|
BalancedDelimiterTracker T(*this, tok::l_paren);
|
|
if (T.expectAndConsume(diag::err_expected_lparen_after,
|
|
"__underlying_type", tok::r_paren)) {
|
|
return;
|
|
}
|
|
|
|
TypeResult Result = ParseTypeName();
|
|
if (Result.isInvalid()) {
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
return;
|
|
}
|
|
|
|
// Match the ')'
|
|
T.consumeClose();
|
|
if (T.getCloseLocation().isInvalid())
|
|
return;
|
|
|
|
const char *PrevSpec = nullptr;
|
|
unsigned DiagID;
|
|
if (DS.SetTypeSpecType(DeclSpec::TST_underlyingType, StartLoc, PrevSpec,
|
|
DiagID, Result.get(),
|
|
Actions.getASTContext().getPrintingPolicy()))
|
|
Diag(StartLoc, DiagID) << PrevSpec;
|
|
DS.setTypeofParensRange(T.getRange());
|
|
}
|
|
|
|
/// ParseBaseTypeSpecifier - Parse a C++ base-type-specifier which is either a
|
|
/// class name or decltype-specifier. Note that we only check that the result
|
|
/// names a type; semantic analysis will need to verify that the type names a
|
|
/// class. The result is either a type or null, depending on whether a type
|
|
/// name was found.
|
|
///
|
|
/// base-type-specifier: [C++11 class.derived]
|
|
/// class-or-decltype
|
|
/// class-or-decltype: [C++11 class.derived]
|
|
/// nested-name-specifier[opt] class-name
|
|
/// decltype-specifier
|
|
/// class-name: [C++ class.name]
|
|
/// identifier
|
|
/// simple-template-id
|
|
///
|
|
/// In C++98, instead of base-type-specifier, we have:
|
|
///
|
|
/// ::[opt] nested-name-specifier[opt] class-name
|
|
TypeResult Parser::ParseBaseTypeSpecifier(SourceLocation &BaseLoc,
|
|
SourceLocation &EndLocation) {
|
|
// Ignore attempts to use typename
|
|
if (Tok.is(tok::kw_typename)) {
|
|
Diag(Tok, diag::err_expected_class_name_not_template)
|
|
<< FixItHint::CreateRemoval(Tok.getLocation());
|
|
ConsumeToken();
|
|
}
|
|
|
|
// Parse optional nested-name-specifier
|
|
CXXScopeSpec SS;
|
|
if (ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/nullptr,
|
|
/*ObjectHadErrors=*/false,
|
|
/*EnteringContext=*/false))
|
|
return true;
|
|
|
|
BaseLoc = Tok.getLocation();
|
|
|
|
// Parse decltype-specifier
|
|
// tok == kw_decltype is just error recovery, it can only happen when SS
|
|
// isn't empty
|
|
if (Tok.isOneOf(tok::kw_decltype, tok::annot_decltype)) {
|
|
if (SS.isNotEmpty())
|
|
Diag(SS.getBeginLoc(), diag::err_unexpected_scope_on_base_decltype)
|
|
<< FixItHint::CreateRemoval(SS.getRange());
|
|
// Fake up a Declarator to use with ActOnTypeName.
|
|
DeclSpec DS(AttrFactory);
|
|
|
|
EndLocation = ParseDecltypeSpecifier(DS);
|
|
|
|
Declarator DeclaratorInfo(DS, DeclaratorContext::TypeName);
|
|
return Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
|
|
}
|
|
|
|
// Check whether we have a template-id that names a type.
|
|
if (Tok.is(tok::annot_template_id)) {
|
|
TemplateIdAnnotation *TemplateId = takeTemplateIdAnnotation(Tok);
|
|
if (TemplateId->mightBeType()) {
|
|
AnnotateTemplateIdTokenAsType(SS, /*IsClassName*/true);
|
|
|
|
assert(Tok.is(tok::annot_typename) && "template-id -> type failed");
|
|
TypeResult Type = getTypeAnnotation(Tok);
|
|
EndLocation = Tok.getAnnotationEndLoc();
|
|
ConsumeAnnotationToken();
|
|
return Type;
|
|
}
|
|
|
|
// Fall through to produce an error below.
|
|
}
|
|
|
|
if (Tok.isNot(tok::identifier)) {
|
|
Diag(Tok, diag::err_expected_class_name);
|
|
return true;
|
|
}
|
|
|
|
IdentifierInfo *Id = Tok.getIdentifierInfo();
|
|
SourceLocation IdLoc = ConsumeToken();
|
|
|
|
if (Tok.is(tok::less)) {
|
|
// It looks the user intended to write a template-id here, but the
|
|
// template-name was wrong. Try to fix that.
|
|
// FIXME: Invoke ParseOptionalCXXScopeSpecifier in a "'template' is neither
|
|
// required nor permitted" mode, and do this there.
|
|
TemplateNameKind TNK = TNK_Non_template;
|
|
TemplateTy Template;
|
|
if (!Actions.DiagnoseUnknownTemplateName(*Id, IdLoc, getCurScope(),
|
|
&SS, Template, TNK)) {
|
|
Diag(IdLoc, diag::err_unknown_template_name)
|
|
<< Id;
|
|
}
|
|
|
|
// Form the template name
|
|
UnqualifiedId TemplateName;
|
|
TemplateName.setIdentifier(Id, IdLoc);
|
|
|
|
// Parse the full template-id, then turn it into a type.
|
|
if (AnnotateTemplateIdToken(Template, TNK, SS, SourceLocation(),
|
|
TemplateName))
|
|
return true;
|
|
if (Tok.is(tok::annot_template_id) &&
|
|
takeTemplateIdAnnotation(Tok)->mightBeType())
|
|
AnnotateTemplateIdTokenAsType(SS, /*IsClassName*/true);
|
|
|
|
// If we didn't end up with a typename token, there's nothing more we
|
|
// can do.
|
|
if (Tok.isNot(tok::annot_typename))
|
|
return true;
|
|
|
|
// Retrieve the type from the annotation token, consume that token, and
|
|
// return.
|
|
EndLocation = Tok.getAnnotationEndLoc();
|
|
TypeResult Type = getTypeAnnotation(Tok);
|
|
ConsumeAnnotationToken();
|
|
return Type;
|
|
}
|
|
|
|
// We have an identifier; check whether it is actually a type.
|
|
IdentifierInfo *CorrectedII = nullptr;
|
|
ParsedType Type = Actions.getTypeName(
|
|
*Id, IdLoc, getCurScope(), &SS, /*isClassName=*/true, false, nullptr,
|
|
/*IsCtorOrDtorName=*/false,
|
|
/*WantNontrivialTypeSourceInfo=*/true,
|
|
/*IsClassTemplateDeductionContext*/ false, &CorrectedII);
|
|
if (!Type) {
|
|
Diag(IdLoc, diag::err_expected_class_name);
|
|
return true;
|
|
}
|
|
|
|
// Consume the identifier.
|
|
EndLocation = IdLoc;
|
|
|
|
// Fake up a Declarator to use with ActOnTypeName.
|
|
DeclSpec DS(AttrFactory);
|
|
DS.SetRangeStart(IdLoc);
|
|
DS.SetRangeEnd(EndLocation);
|
|
DS.getTypeSpecScope() = SS;
|
|
|
|
const char *PrevSpec = nullptr;
|
|
unsigned DiagID;
|
|
DS.SetTypeSpecType(TST_typename, IdLoc, PrevSpec, DiagID, Type,
|
|
Actions.getASTContext().getPrintingPolicy());
|
|
|
|
Declarator DeclaratorInfo(DS, DeclaratorContext::TypeName);
|
|
return Actions.ActOnTypeName(getCurScope(), DeclaratorInfo);
|
|
}
|
|
|
|
void Parser::ParseMicrosoftInheritanceClassAttributes(ParsedAttributes &attrs) {
|
|
while (Tok.isOneOf(tok::kw___single_inheritance,
|
|
tok::kw___multiple_inheritance,
|
|
tok::kw___virtual_inheritance)) {
|
|
IdentifierInfo *AttrName = Tok.getIdentifierInfo();
|
|
SourceLocation AttrNameLoc = ConsumeToken();
|
|
attrs.addNew(AttrName, AttrNameLoc, nullptr, AttrNameLoc, nullptr, 0,
|
|
ParsedAttr::AS_Keyword);
|
|
}
|
|
}
|
|
|
|
/// Determine whether the following tokens are valid after a type-specifier
|
|
/// which could be a standalone declaration. This will conservatively return
|
|
/// true if there's any doubt, and is appropriate for insert-';' fixits.
|
|
bool Parser::isValidAfterTypeSpecifier(bool CouldBeBitfield) {
|
|
// This switch enumerates the valid "follow" set for type-specifiers.
|
|
switch (Tok.getKind()) {
|
|
default: break;
|
|
case tok::semi: // struct foo {...} ;
|
|
case tok::star: // struct foo {...} * P;
|
|
case tok::amp: // struct foo {...} & R = ...
|
|
case tok::ampamp: // struct foo {...} && R = ...
|
|
case tok::identifier: // struct foo {...} V ;
|
|
case tok::r_paren: //(struct foo {...} ) {4}
|
|
case tok::coloncolon: // struct foo {...} :: a::b;
|
|
case tok::annot_cxxscope: // struct foo {...} a:: b;
|
|
case tok::annot_typename: // struct foo {...} a ::b;
|
|
case tok::annot_template_id: // struct foo {...} a<int> ::b;
|
|
case tok::kw_decltype: // struct foo {...} decltype (a)::b;
|
|
case tok::l_paren: // struct foo {...} ( x);
|
|
case tok::comma: // __builtin_offsetof(struct foo{...} ,
|
|
case tok::kw_operator: // struct foo operator ++() {...}
|
|
case tok::kw___declspec: // struct foo {...} __declspec(...)
|
|
case tok::l_square: // void f(struct f [ 3])
|
|
case tok::ellipsis: // void f(struct f ... [Ns])
|
|
// FIXME: we should emit semantic diagnostic when declaration
|
|
// attribute is in type attribute position.
|
|
case tok::kw___attribute: // struct foo __attribute__((used)) x;
|
|
case tok::annot_pragma_pack: // struct foo {...} _Pragma(pack(pop));
|
|
// struct foo {...} _Pragma(section(...));
|
|
case tok::annot_pragma_ms_pragma:
|
|
// struct foo {...} _Pragma(vtordisp(pop));
|
|
case tok::annot_pragma_ms_vtordisp:
|
|
// struct foo {...} _Pragma(pointers_to_members(...));
|
|
case tok::annot_pragma_ms_pointers_to_members:
|
|
return true;
|
|
case tok::colon:
|
|
return CouldBeBitfield || // enum E { ... } : 2;
|
|
ColonIsSacred; // _Generic(..., enum E : 2);
|
|
// Microsoft compatibility
|
|
case tok::kw___cdecl: // struct foo {...} __cdecl x;
|
|
case tok::kw___fastcall: // struct foo {...} __fastcall x;
|
|
case tok::kw___stdcall: // struct foo {...} __stdcall x;
|
|
case tok::kw___thiscall: // struct foo {...} __thiscall x;
|
|
case tok::kw___vectorcall: // struct foo {...} __vectorcall x;
|
|
// We will diagnose these calling-convention specifiers on non-function
|
|
// declarations later, so claim they are valid after a type specifier.
|
|
return getLangOpts().MicrosoftExt;
|
|
// Type qualifiers
|
|
case tok::kw_const: // struct foo {...} const x;
|
|
case tok::kw_volatile: // struct foo {...} volatile x;
|
|
case tok::kw_restrict: // struct foo {...} restrict x;
|
|
case tok::kw__Atomic: // struct foo {...} _Atomic x;
|
|
case tok::kw___unaligned: // struct foo {...} __unaligned *x;
|
|
// Function specifiers
|
|
// Note, no 'explicit'. An explicit function must be either a conversion
|
|
// operator or a constructor. Either way, it can't have a return type.
|
|
case tok::kw_inline: // struct foo inline f();
|
|
case tok::kw_virtual: // struct foo virtual f();
|
|
case tok::kw_friend: // struct foo friend f();
|
|
// Storage-class specifiers
|
|
case tok::kw_static: // struct foo {...} static x;
|
|
case tok::kw_extern: // struct foo {...} extern x;
|
|
case tok::kw_typedef: // struct foo {...} typedef x;
|
|
case tok::kw_register: // struct foo {...} register x;
|
|
case tok::kw_auto: // struct foo {...} auto x;
|
|
case tok::kw_mutable: // struct foo {...} mutable x;
|
|
case tok::kw_thread_local: // struct foo {...} thread_local x;
|
|
case tok::kw_constexpr: // struct foo {...} constexpr x;
|
|
case tok::kw_consteval: // struct foo {...} consteval x;
|
|
case tok::kw_constinit: // struct foo {...} constinit x;
|
|
// As shown above, type qualifiers and storage class specifiers absolutely
|
|
// can occur after class specifiers according to the grammar. However,
|
|
// almost no one actually writes code like this. If we see one of these,
|
|
// it is much more likely that someone missed a semi colon and the
|
|
// type/storage class specifier we're seeing is part of the *next*
|
|
// intended declaration, as in:
|
|
//
|
|
// struct foo { ... }
|
|
// typedef int X;
|
|
//
|
|
// We'd really like to emit a missing semicolon error instead of emitting
|
|
// an error on the 'int' saying that you can't have two type specifiers in
|
|
// the same declaration of X. Because of this, we look ahead past this
|
|
// token to see if it's a type specifier. If so, we know the code is
|
|
// otherwise invalid, so we can produce the expected semi error.
|
|
if (!isKnownToBeTypeSpecifier(NextToken()))
|
|
return true;
|
|
break;
|
|
case tok::r_brace: // struct bar { struct foo {...} }
|
|
// Missing ';' at end of struct is accepted as an extension in C mode.
|
|
if (!getLangOpts().CPlusPlus)
|
|
return true;
|
|
break;
|
|
case tok::greater:
|
|
// template<class T = class X>
|
|
return getLangOpts().CPlusPlus;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/// ParseClassSpecifier - Parse a C++ class-specifier [C++ class] or
|
|
/// elaborated-type-specifier [C++ dcl.type.elab]; we can't tell which
|
|
/// until we reach the start of a definition or see a token that
|
|
/// cannot start a definition.
|
|
///
|
|
/// class-specifier: [C++ class]
|
|
/// class-head '{' member-specification[opt] '}'
|
|
/// class-head '{' member-specification[opt] '}' attributes[opt]
|
|
/// class-head:
|
|
/// class-key identifier[opt] base-clause[opt]
|
|
/// class-key nested-name-specifier identifier base-clause[opt]
|
|
/// class-key nested-name-specifier[opt] simple-template-id
|
|
/// base-clause[opt]
|
|
/// [GNU] class-key attributes[opt] identifier[opt] base-clause[opt]
|
|
/// [GNU] class-key attributes[opt] nested-name-specifier
|
|
/// identifier base-clause[opt]
|
|
/// [GNU] class-key attributes[opt] nested-name-specifier[opt]
|
|
/// simple-template-id base-clause[opt]
|
|
/// class-key:
|
|
/// 'class'
|
|
/// 'struct'
|
|
/// 'union'
|
|
///
|
|
/// elaborated-type-specifier: [C++ dcl.type.elab]
|
|
/// class-key ::[opt] nested-name-specifier[opt] identifier
|
|
/// class-key ::[opt] nested-name-specifier[opt] 'template'[opt]
|
|
/// simple-template-id
|
|
///
|
|
/// Note that the C++ class-specifier and elaborated-type-specifier,
|
|
/// together, subsume the C99 struct-or-union-specifier:
|
|
///
|
|
/// struct-or-union-specifier: [C99 6.7.2.1]
|
|
/// struct-or-union identifier[opt] '{' struct-contents '}'
|
|
/// struct-or-union identifier
|
|
/// [GNU] struct-or-union attributes[opt] identifier[opt] '{' struct-contents
|
|
/// '}' attributes[opt]
|
|
/// [GNU] struct-or-union attributes[opt] identifier
|
|
/// struct-or-union:
|
|
/// 'struct'
|
|
/// 'union'
|
|
void Parser::ParseClassSpecifier(tok::TokenKind TagTokKind,
|
|
SourceLocation StartLoc, DeclSpec &DS,
|
|
const ParsedTemplateInfo &TemplateInfo,
|
|
AccessSpecifier AS,
|
|
bool EnteringContext, DeclSpecContext DSC,
|
|
ParsedAttributesWithRange &Attributes) {
|
|
DeclSpec::TST TagType;
|
|
if (TagTokKind == tok::kw_struct)
|
|
TagType = DeclSpec::TST_struct;
|
|
else if (TagTokKind == tok::kw___interface)
|
|
TagType = DeclSpec::TST_interface;
|
|
else if (TagTokKind == tok::kw_class)
|
|
TagType = DeclSpec::TST_class;
|
|
else {
|
|
assert(TagTokKind == tok::kw_union && "Not a class specifier");
|
|
TagType = DeclSpec::TST_union;
|
|
}
|
|
|
|
if (Tok.is(tok::code_completion)) {
|
|
// Code completion for a struct, class, or union name.
|
|
Actions.CodeCompleteTag(getCurScope(), TagType);
|
|
return cutOffParsing();
|
|
}
|
|
|
|
// C++03 [temp.explicit] 14.7.2/8:
|
|
// The usual access checking rules do not apply to names used to specify
|
|
// explicit instantiations.
|
|
//
|
|
// As an extension we do not perform access checking on the names used to
|
|
// specify explicit specializations either. This is important to allow
|
|
// specializing traits classes for private types.
|
|
//
|
|
// Note that we don't suppress if this turns out to be an elaborated
|
|
// type specifier.
|
|
bool shouldDelayDiagsInTag =
|
|
(TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation ||
|
|
TemplateInfo.Kind == ParsedTemplateInfo::ExplicitSpecialization);
|
|
SuppressAccessChecks diagsFromTag(*this, shouldDelayDiagsInTag);
|
|
|
|
ParsedAttributesWithRange attrs(AttrFactory);
|
|
// If attributes exist after tag, parse them.
|
|
MaybeParseGNUAttributes(attrs);
|
|
MaybeParseMicrosoftDeclSpecs(attrs);
|
|
|
|
// Parse inheritance specifiers.
|
|
if (Tok.isOneOf(tok::kw___single_inheritance,
|
|
tok::kw___multiple_inheritance,
|
|
tok::kw___virtual_inheritance))
|
|
ParseMicrosoftInheritanceClassAttributes(attrs);
|
|
|
|
// If C++0x attributes exist here, parse them.
|
|
// FIXME: Are we consistent with the ordering of parsing of different
|
|
// styles of attributes?
|
|
MaybeParseCXX11Attributes(attrs);
|
|
|
|
// Source location used by FIXIT to insert misplaced
|
|
// C++11 attributes
|
|
SourceLocation AttrFixitLoc = Tok.getLocation();
|
|
|
|
if (TagType == DeclSpec::TST_struct &&
|
|
Tok.isNot(tok::identifier) &&
|
|
!Tok.isAnnotation() &&
|
|
Tok.getIdentifierInfo() &&
|
|
Tok.isOneOf(tok::kw___is_abstract,
|
|
tok::kw___is_aggregate,
|
|
tok::kw___is_arithmetic,
|
|
tok::kw___is_array,
|
|
tok::kw___is_assignable,
|
|
tok::kw___is_base_of,
|
|
tok::kw___is_class,
|
|
tok::kw___is_complete_type,
|
|
tok::kw___is_compound,
|
|
tok::kw___is_const,
|
|
tok::kw___is_constructible,
|
|
tok::kw___is_convertible,
|
|
tok::kw___is_convertible_to,
|
|
tok::kw___is_destructible,
|
|
tok::kw___is_empty,
|
|
tok::kw___is_enum,
|
|
tok::kw___is_floating_point,
|
|
tok::kw___is_final,
|
|
tok::kw___is_function,
|
|
tok::kw___is_fundamental,
|
|
tok::kw___is_integral,
|
|
tok::kw___is_interface_class,
|
|
tok::kw___is_literal,
|
|
tok::kw___is_lvalue_expr,
|
|
tok::kw___is_lvalue_reference,
|
|
tok::kw___is_member_function_pointer,
|
|
tok::kw___is_member_object_pointer,
|
|
tok::kw___is_member_pointer,
|
|
tok::kw___is_nothrow_assignable,
|
|
tok::kw___is_nothrow_constructible,
|
|
tok::kw___is_nothrow_destructible,
|
|
tok::kw___is_object,
|
|
tok::kw___is_pod,
|
|
tok::kw___is_pointer,
|
|
tok::kw___is_polymorphic,
|
|
tok::kw___is_reference,
|
|
tok::kw___is_rvalue_expr,
|
|
tok::kw___is_rvalue_reference,
|
|
tok::kw___is_same,
|
|
tok::kw___is_scalar,
|
|
tok::kw___is_sealed,
|
|
tok::kw___is_signed,
|
|
tok::kw___is_standard_layout,
|
|
tok::kw___is_trivial,
|
|
tok::kw___is_trivially_assignable,
|
|
tok::kw___is_trivially_constructible,
|
|
tok::kw___is_trivially_copyable,
|
|
tok::kw___is_union,
|
|
tok::kw___is_unsigned,
|
|
tok::kw___is_void,
|
|
tok::kw___is_volatile))
|
|
// GNU libstdc++ 4.2 and libc++ use certain intrinsic names as the
|
|
// name of struct templates, but some are keywords in GCC >= 4.3
|
|
// and Clang. Therefore, when we see the token sequence "struct
|
|
// X", make X into a normal identifier rather than a keyword, to
|
|
// allow libstdc++ 4.2 and libc++ to work properly.
|
|
TryKeywordIdentFallback(true);
|
|
|
|
struct PreserveAtomicIdentifierInfoRAII {
|
|
PreserveAtomicIdentifierInfoRAII(Token &Tok, bool Enabled)
|
|
: AtomicII(nullptr) {
|
|
if (!Enabled)
|
|
return;
|
|
assert(Tok.is(tok::kw__Atomic));
|
|
AtomicII = Tok.getIdentifierInfo();
|
|
AtomicII->revertTokenIDToIdentifier();
|
|
Tok.setKind(tok::identifier);
|
|
}
|
|
~PreserveAtomicIdentifierInfoRAII() {
|
|
if (!AtomicII)
|
|
return;
|
|
AtomicII->revertIdentifierToTokenID(tok::kw__Atomic);
|
|
}
|
|
IdentifierInfo *AtomicII;
|
|
};
|
|
|
|
// HACK: MSVC doesn't consider _Atomic to be a keyword and its STL
|
|
// implementation for VS2013 uses _Atomic as an identifier for one of the
|
|
// classes in <atomic>. When we are parsing 'struct _Atomic', don't consider
|
|
// '_Atomic' to be a keyword. We are careful to undo this so that clang can
|
|
// use '_Atomic' in its own header files.
|
|
bool ShouldChangeAtomicToIdentifier = getLangOpts().MSVCCompat &&
|
|
Tok.is(tok::kw__Atomic) &&
|
|
TagType == DeclSpec::TST_struct;
|
|
PreserveAtomicIdentifierInfoRAII AtomicTokenGuard(
|
|
Tok, ShouldChangeAtomicToIdentifier);
|
|
|
|
// Parse the (optional) nested-name-specifier.
|
|
CXXScopeSpec &SS = DS.getTypeSpecScope();
|
|
if (getLangOpts().CPlusPlus) {
|
|
// "FOO : BAR" is not a potential typo for "FOO::BAR". In this context it
|
|
// is a base-specifier-list.
|
|
ColonProtectionRAIIObject X(*this);
|
|
|
|
CXXScopeSpec Spec;
|
|
bool HasValidSpec = true;
|
|
if (ParseOptionalCXXScopeSpecifier(Spec, /*ObjectType=*/nullptr,
|
|
/*ObjectHadErrors=*/false,
|
|
EnteringContext)) {
|
|
DS.SetTypeSpecError();
|
|
HasValidSpec = false;
|
|
}
|
|
if (Spec.isSet())
|
|
if (Tok.isNot(tok::identifier) && Tok.isNot(tok::annot_template_id)) {
|
|
Diag(Tok, diag::err_expected) << tok::identifier;
|
|
HasValidSpec = false;
|
|
}
|
|
if (HasValidSpec)
|
|
SS = Spec;
|
|
}
|
|
|
|
TemplateParameterLists *TemplateParams = TemplateInfo.TemplateParams;
|
|
|
|
auto RecoverFromUndeclaredTemplateName = [&](IdentifierInfo *Name,
|
|
SourceLocation NameLoc,
|
|
SourceRange TemplateArgRange,
|
|
bool KnownUndeclared) {
|
|
Diag(NameLoc, diag::err_explicit_spec_non_template)
|
|
<< (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation)
|
|
<< TagTokKind << Name << TemplateArgRange << KnownUndeclared;
|
|
|
|
// Strip off the last template parameter list if it was empty, since
|
|
// we've removed its template argument list.
|
|
if (TemplateParams && TemplateInfo.LastParameterListWasEmpty) {
|
|
if (TemplateParams->size() > 1) {
|
|
TemplateParams->pop_back();
|
|
} else {
|
|
TemplateParams = nullptr;
|
|
const_cast<ParsedTemplateInfo &>(TemplateInfo).Kind =
|
|
ParsedTemplateInfo::NonTemplate;
|
|
}
|
|
} else if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) {
|
|
// Pretend this is just a forward declaration.
|
|
TemplateParams = nullptr;
|
|
const_cast<ParsedTemplateInfo &>(TemplateInfo).Kind =
|
|
ParsedTemplateInfo::NonTemplate;
|
|
const_cast<ParsedTemplateInfo &>(TemplateInfo).TemplateLoc =
|
|
SourceLocation();
|
|
const_cast<ParsedTemplateInfo &>(TemplateInfo).ExternLoc =
|
|
SourceLocation();
|
|
}
|
|
};
|
|
|
|
// Parse the (optional) class name or simple-template-id.
|
|
IdentifierInfo *Name = nullptr;
|
|
SourceLocation NameLoc;
|
|
TemplateIdAnnotation *TemplateId = nullptr;
|
|
if (Tok.is(tok::identifier)) {
|
|
Name = Tok.getIdentifierInfo();
|
|
NameLoc = ConsumeToken();
|
|
|
|
if (Tok.is(tok::less) && getLangOpts().CPlusPlus) {
|
|
// The name was supposed to refer to a template, but didn't.
|
|
// Eat the template argument list and try to continue parsing this as
|
|
// a class (or template thereof).
|
|
TemplateArgList TemplateArgs;
|
|
SourceLocation LAngleLoc, RAngleLoc;
|
|
if (ParseTemplateIdAfterTemplateName(true, LAngleLoc, TemplateArgs,
|
|
RAngleLoc)) {
|
|
// We couldn't parse the template argument list at all, so don't
|
|
// try to give any location information for the list.
|
|
LAngleLoc = RAngleLoc = SourceLocation();
|
|
}
|
|
RecoverFromUndeclaredTemplateName(
|
|
Name, NameLoc, SourceRange(LAngleLoc, RAngleLoc), false);
|
|
}
|
|
} else if (Tok.is(tok::annot_template_id)) {
|
|
TemplateId = takeTemplateIdAnnotation(Tok);
|
|
NameLoc = ConsumeAnnotationToken();
|
|
|
|
if (TemplateId->Kind == TNK_Undeclared_template) {
|
|
// Try to resolve the template name to a type template. May update Kind.
|
|
Actions.ActOnUndeclaredTypeTemplateName(
|
|
getCurScope(), TemplateId->Template, TemplateId->Kind, NameLoc, Name);
|
|
if (TemplateId->Kind == TNK_Undeclared_template) {
|
|
RecoverFromUndeclaredTemplateName(
|
|
Name, NameLoc,
|
|
SourceRange(TemplateId->LAngleLoc, TemplateId->RAngleLoc), true);
|
|
TemplateId = nullptr;
|
|
}
|
|
}
|
|
|
|
if (TemplateId && !TemplateId->mightBeType()) {
|
|
// The template-name in the simple-template-id refers to
|
|
// something other than a type template. Give an appropriate
|
|
// error message and skip to the ';'.
|
|
SourceRange Range(NameLoc);
|
|
if (SS.isNotEmpty())
|
|
Range.setBegin(SS.getBeginLoc());
|
|
|
|
// FIXME: Name may be null here.
|
|
Diag(TemplateId->LAngleLoc, diag::err_template_spec_syntax_non_template)
|
|
<< TemplateId->Name << static_cast<int>(TemplateId->Kind) << Range;
|
|
|
|
DS.SetTypeSpecError();
|
|
SkipUntil(tok::semi, StopBeforeMatch);
|
|
return;
|
|
}
|
|
}
|
|
|
|
// There are four options here.
|
|
// - If we are in a trailing return type, this is always just a reference,
|
|
// and we must not try to parse a definition. For instance,
|
|
// [] () -> struct S { };
|
|
// does not define a type.
|
|
// - If we have 'struct foo {...', 'struct foo :...',
|
|
// 'struct foo final :' or 'struct foo final {', then this is a definition.
|
|
// - If we have 'struct foo;', then this is either a forward declaration
|
|
// or a friend declaration, which have to be treated differently.
|
|
// - Otherwise we have something like 'struct foo xyz', a reference.
|
|
//
|
|
// We also detect these erroneous cases to provide better diagnostic for
|
|
// C++11 attributes parsing.
|
|
// - attributes follow class name:
|
|
// struct foo [[]] {};
|
|
// - attributes appear before or after 'final':
|
|
// struct foo [[]] final [[]] {};
|
|
//
|
|
// However, in type-specifier-seq's, things look like declarations but are
|
|
// just references, e.g.
|
|
// new struct s;
|
|
// or
|
|
// &T::operator struct s;
|
|
// For these, DSC is DeclSpecContext::DSC_type_specifier or
|
|
// DeclSpecContext::DSC_alias_declaration.
|
|
|
|
// If there are attributes after class name, parse them.
|
|
MaybeParseCXX11Attributes(Attributes);
|
|
|
|
const PrintingPolicy &Policy = Actions.getASTContext().getPrintingPolicy();
|
|
Sema::TagUseKind TUK;
|
|
if (isDefiningTypeSpecifierContext(DSC) == AllowDefiningTypeSpec::No ||
|
|
(getLangOpts().OpenMP && OpenMPDirectiveParsing))
|
|
TUK = Sema::TUK_Reference;
|
|
else if (Tok.is(tok::l_brace) ||
|
|
(getLangOpts().CPlusPlus && Tok.is(tok::colon)) ||
|
|
(isCXX11FinalKeyword() &&
|
|
(NextToken().is(tok::l_brace) || NextToken().is(tok::colon)))) {
|
|
if (DS.isFriendSpecified()) {
|
|
// C++ [class.friend]p2:
|
|
// A class shall not be defined in a friend declaration.
|
|
Diag(Tok.getLocation(), diag::err_friend_decl_defines_type)
|
|
<< SourceRange(DS.getFriendSpecLoc());
|
|
|
|
// Skip everything up to the semicolon, so that this looks like a proper
|
|
// friend class (or template thereof) declaration.
|
|
SkipUntil(tok::semi, StopBeforeMatch);
|
|
TUK = Sema::TUK_Friend;
|
|
} else {
|
|
// Okay, this is a class definition.
|
|
TUK = Sema::TUK_Definition;
|
|
}
|
|
} else if (isCXX11FinalKeyword() && (NextToken().is(tok::l_square) ||
|
|
NextToken().is(tok::kw_alignas))) {
|
|
// We can't tell if this is a definition or reference
|
|
// until we skipped the 'final' and C++11 attribute specifiers.
|
|
TentativeParsingAction PA(*this);
|
|
|
|
// Skip the 'final' keyword.
|
|
ConsumeToken();
|
|
|
|
// Skip C++11 attribute specifiers.
|
|
while (true) {
|
|
if (Tok.is(tok::l_square) && NextToken().is(tok::l_square)) {
|
|
ConsumeBracket();
|
|
if (!SkipUntil(tok::r_square, StopAtSemi))
|
|
break;
|
|
} else if (Tok.is(tok::kw_alignas) && NextToken().is(tok::l_paren)) {
|
|
ConsumeToken();
|
|
ConsumeParen();
|
|
if (!SkipUntil(tok::r_paren, StopAtSemi))
|
|
break;
|
|
} else {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (Tok.isOneOf(tok::l_brace, tok::colon))
|
|
TUK = Sema::TUK_Definition;
|
|
else
|
|
TUK = Sema::TUK_Reference;
|
|
|
|
PA.Revert();
|
|
} else if (!isTypeSpecifier(DSC) &&
|
|
(Tok.is(tok::semi) ||
|
|
(Tok.isAtStartOfLine() && !isValidAfterTypeSpecifier(false)))) {
|
|
TUK = DS.isFriendSpecified() ? Sema::TUK_Friend : Sema::TUK_Declaration;
|
|
if (Tok.isNot(tok::semi)) {
|
|
const PrintingPolicy &PPol = Actions.getASTContext().getPrintingPolicy();
|
|
// A semicolon was missing after this declaration. Diagnose and recover.
|
|
ExpectAndConsume(tok::semi, diag::err_expected_after,
|
|
DeclSpec::getSpecifierName(TagType, PPol));
|
|
PP.EnterToken(Tok, /*IsReinject*/true);
|
|
Tok.setKind(tok::semi);
|
|
}
|
|
} else
|
|
TUK = Sema::TUK_Reference;
|
|
|
|
// Forbid misplaced attributes. In cases of a reference, we pass attributes
|
|
// to caller to handle.
|
|
if (TUK != Sema::TUK_Reference) {
|
|
// If this is not a reference, then the only possible
|
|
// valid place for C++11 attributes to appear here
|
|
// is between class-key and class-name. If there are
|
|
// any attributes after class-name, we try a fixit to move
|
|
// them to the right place.
|
|
SourceRange AttrRange = Attributes.Range;
|
|
if (AttrRange.isValid()) {
|
|
Diag(AttrRange.getBegin(), diag::err_attributes_not_allowed)
|
|
<< AttrRange
|
|
<< FixItHint::CreateInsertionFromRange(AttrFixitLoc,
|
|
CharSourceRange(AttrRange, true))
|
|
<< FixItHint::CreateRemoval(AttrRange);
|
|
|
|
// Recover by adding misplaced attributes to the attribute list
|
|
// of the class so they can be applied on the class later.
|
|
attrs.takeAllFrom(Attributes);
|
|
}
|
|
}
|
|
|
|
// If this is an elaborated type specifier, and we delayed
|
|
// diagnostics before, just merge them into the current pool.
|
|
if (shouldDelayDiagsInTag) {
|
|
diagsFromTag.done();
|
|
if (TUK == Sema::TUK_Reference)
|
|
diagsFromTag.redelay();
|
|
}
|
|
|
|
if (!Name && !TemplateId && (DS.getTypeSpecType() == DeclSpec::TST_error ||
|
|
TUK != Sema::TUK_Definition)) {
|
|
if (DS.getTypeSpecType() != DeclSpec::TST_error) {
|
|
// We have a declaration or reference to an anonymous class.
|
|
Diag(StartLoc, diag::err_anon_type_definition)
|
|
<< DeclSpec::getSpecifierName(TagType, Policy);
|
|
}
|
|
|
|
// If we are parsing a definition and stop at a base-clause, continue on
|
|
// until the semicolon. Continuing from the comma will just trick us into
|
|
// thinking we are seeing a variable declaration.
|
|
if (TUK == Sema::TUK_Definition && Tok.is(tok::colon))
|
|
SkipUntil(tok::semi, StopBeforeMatch);
|
|
else
|
|
SkipUntil(tok::comma, StopAtSemi);
|
|
return;
|
|
}
|
|
|
|
// Create the tag portion of the class or class template.
|
|
DeclResult TagOrTempResult = true; // invalid
|
|
TypeResult TypeResult = true; // invalid
|
|
|
|
bool Owned = false;
|
|
Sema::SkipBodyInfo SkipBody;
|
|
if (TemplateId) {
|
|
// Explicit specialization, class template partial specialization,
|
|
// or explicit instantiation.
|
|
ASTTemplateArgsPtr TemplateArgsPtr(TemplateId->getTemplateArgs(),
|
|
TemplateId->NumArgs);
|
|
if (TemplateId->isInvalid()) {
|
|
// Can't build the declaration.
|
|
} else if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation &&
|
|
TUK == Sema::TUK_Declaration) {
|
|
// This is an explicit instantiation of a class template.
|
|
ProhibitAttributes(attrs);
|
|
|
|
TagOrTempResult = Actions.ActOnExplicitInstantiation(
|
|
getCurScope(), TemplateInfo.ExternLoc, TemplateInfo.TemplateLoc,
|
|
TagType, StartLoc, SS, TemplateId->Template,
|
|
TemplateId->TemplateNameLoc, TemplateId->LAngleLoc, TemplateArgsPtr,
|
|
TemplateId->RAngleLoc, attrs);
|
|
|
|
// Friend template-ids are treated as references unless
|
|
// they have template headers, in which case they're ill-formed
|
|
// (FIXME: "template <class T> friend class A<T>::B<int>;").
|
|
// We diagnose this error in ActOnClassTemplateSpecialization.
|
|
} else if (TUK == Sema::TUK_Reference ||
|
|
(TUK == Sema::TUK_Friend &&
|
|
TemplateInfo.Kind == ParsedTemplateInfo::NonTemplate)) {
|
|
ProhibitAttributes(attrs);
|
|
TypeResult = Actions.ActOnTagTemplateIdType(TUK, TagType, StartLoc,
|
|
SS,
|
|
TemplateId->TemplateKWLoc,
|
|
TemplateId->Template,
|
|
TemplateId->TemplateNameLoc,
|
|
TemplateId->LAngleLoc,
|
|
TemplateArgsPtr,
|
|
TemplateId->RAngleLoc);
|
|
} else {
|
|
// This is an explicit specialization or a class template
|
|
// partial specialization.
|
|
TemplateParameterLists FakedParamLists;
|
|
if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) {
|
|
// This looks like an explicit instantiation, because we have
|
|
// something like
|
|
//
|
|
// template class Foo<X>
|
|
//
|
|
// but it actually has a definition. Most likely, this was
|
|
// meant to be an explicit specialization, but the user forgot
|
|
// the '<>' after 'template'.
|
|
// It this is friend declaration however, since it cannot have a
|
|
// template header, it is most likely that the user meant to
|
|
// remove the 'template' keyword.
|
|
assert((TUK == Sema::TUK_Definition || TUK == Sema::TUK_Friend) &&
|
|
"Expected a definition here");
|
|
|
|
if (TUK == Sema::TUK_Friend) {
|
|
Diag(DS.getFriendSpecLoc(), diag::err_friend_explicit_instantiation);
|
|
TemplateParams = nullptr;
|
|
} else {
|
|
SourceLocation LAngleLoc =
|
|
PP.getLocForEndOfToken(TemplateInfo.TemplateLoc);
|
|
Diag(TemplateId->TemplateNameLoc,
|
|
diag::err_explicit_instantiation_with_definition)
|
|
<< SourceRange(TemplateInfo.TemplateLoc)
|
|
<< FixItHint::CreateInsertion(LAngleLoc, "<>");
|
|
|
|
// Create a fake template parameter list that contains only
|
|
// "template<>", so that we treat this construct as a class
|
|
// template specialization.
|
|
FakedParamLists.push_back(Actions.ActOnTemplateParameterList(
|
|
0, SourceLocation(), TemplateInfo.TemplateLoc, LAngleLoc, None,
|
|
LAngleLoc, nullptr));
|
|
TemplateParams = &FakedParamLists;
|
|
}
|
|
}
|
|
|
|
// Build the class template specialization.
|
|
TagOrTempResult = Actions.ActOnClassTemplateSpecialization(
|
|
getCurScope(), TagType, TUK, StartLoc, DS.getModulePrivateSpecLoc(),
|
|
SS, *TemplateId, attrs,
|
|
MultiTemplateParamsArg(TemplateParams ? &(*TemplateParams)[0]
|
|
: nullptr,
|
|
TemplateParams ? TemplateParams->size() : 0),
|
|
&SkipBody);
|
|
}
|
|
} else if (TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation &&
|
|
TUK == Sema::TUK_Declaration) {
|
|
// Explicit instantiation of a member of a class template
|
|
// specialization, e.g.,
|
|
//
|
|
// template struct Outer<int>::Inner;
|
|
//
|
|
ProhibitAttributes(attrs);
|
|
|
|
TagOrTempResult = Actions.ActOnExplicitInstantiation(
|
|
getCurScope(), TemplateInfo.ExternLoc, TemplateInfo.TemplateLoc,
|
|
TagType, StartLoc, SS, Name, NameLoc, attrs);
|
|
} else if (TUK == Sema::TUK_Friend &&
|
|
TemplateInfo.Kind != ParsedTemplateInfo::NonTemplate) {
|
|
ProhibitAttributes(attrs);
|
|
|
|
TagOrTempResult = Actions.ActOnTemplatedFriendTag(
|
|
getCurScope(), DS.getFriendSpecLoc(), TagType, StartLoc, SS, Name,
|
|
NameLoc, attrs,
|
|
MultiTemplateParamsArg(TemplateParams ? &(*TemplateParams)[0] : nullptr,
|
|
TemplateParams ? TemplateParams->size() : 0));
|
|
} else {
|
|
if (TUK != Sema::TUK_Declaration && TUK != Sema::TUK_Definition)
|
|
ProhibitAttributes(attrs);
|
|
|
|
if (TUK == Sema::TUK_Definition &&
|
|
TemplateInfo.Kind == ParsedTemplateInfo::ExplicitInstantiation) {
|
|
// If the declarator-id is not a template-id, issue a diagnostic and
|
|
// recover by ignoring the 'template' keyword.
|
|
Diag(Tok, diag::err_template_defn_explicit_instantiation)
|
|
<< 1 << FixItHint::CreateRemoval(TemplateInfo.TemplateLoc);
|
|
TemplateParams = nullptr;
|
|
}
|
|
|
|
bool IsDependent = false;
|
|
|
|
// Don't pass down template parameter lists if this is just a tag
|
|
// reference. For example, we don't need the template parameters here:
|
|
// template <class T> class A *makeA(T t);
|
|
MultiTemplateParamsArg TParams;
|
|
if (TUK != Sema::TUK_Reference && TemplateParams)
|
|
TParams =
|
|
MultiTemplateParamsArg(&(*TemplateParams)[0], TemplateParams->size());
|
|
|
|
stripTypeAttributesOffDeclSpec(attrs, DS, TUK);
|
|
|
|
// Declaration or definition of a class type
|
|
TagOrTempResult = Actions.ActOnTag(
|
|
getCurScope(), TagType, TUK, StartLoc, SS, Name, NameLoc, attrs, AS,
|
|
DS.getModulePrivateSpecLoc(), TParams, Owned, IsDependent,
|
|
SourceLocation(), false, clang::TypeResult(),
|
|
DSC == DeclSpecContext::DSC_type_specifier,
|
|
DSC == DeclSpecContext::DSC_template_param ||
|
|
DSC == DeclSpecContext::DSC_template_type_arg,
|
|
&SkipBody);
|
|
|
|
// If ActOnTag said the type was dependent, try again with the
|
|
// less common call.
|
|
if (IsDependent) {
|
|
assert(TUK == Sema::TUK_Reference || TUK == Sema::TUK_Friend);
|
|
TypeResult = Actions.ActOnDependentTag(getCurScope(), TagType, TUK,
|
|
SS, Name, StartLoc, NameLoc);
|
|
}
|
|
}
|
|
|
|
// If there is a body, parse it and inform the actions module.
|
|
if (TUK == Sema::TUK_Definition) {
|
|
assert(Tok.is(tok::l_brace) ||
|
|
(getLangOpts().CPlusPlus && Tok.is(tok::colon)) ||
|
|
isCXX11FinalKeyword());
|
|
if (SkipBody.ShouldSkip)
|
|
SkipCXXMemberSpecification(StartLoc, AttrFixitLoc, TagType,
|
|
TagOrTempResult.get());
|
|
else if (getLangOpts().CPlusPlus)
|
|
ParseCXXMemberSpecification(StartLoc, AttrFixitLoc, attrs, TagType,
|
|
TagOrTempResult.get());
|
|
else {
|
|
Decl *D =
|
|
SkipBody.CheckSameAsPrevious ? SkipBody.New : TagOrTempResult.get();
|
|
// Parse the definition body.
|
|
ParseStructUnionBody(StartLoc, TagType, cast<RecordDecl>(D));
|
|
if (SkipBody.CheckSameAsPrevious &&
|
|
!Actions.ActOnDuplicateDefinition(DS, TagOrTempResult.get(),
|
|
SkipBody)) {
|
|
DS.SetTypeSpecError();
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!TagOrTempResult.isInvalid())
|
|
// Delayed processing of attributes.
|
|
Actions.ProcessDeclAttributeDelayed(TagOrTempResult.get(), attrs);
|
|
|
|
const char *PrevSpec = nullptr;
|
|
unsigned DiagID;
|
|
bool Result;
|
|
if (!TypeResult.isInvalid()) {
|
|
Result = DS.SetTypeSpecType(DeclSpec::TST_typename, StartLoc,
|
|
NameLoc.isValid() ? NameLoc : StartLoc,
|
|
PrevSpec, DiagID, TypeResult.get(), Policy);
|
|
} else if (!TagOrTempResult.isInvalid()) {
|
|
Result = DS.SetTypeSpecType(TagType, StartLoc,
|
|
NameLoc.isValid() ? NameLoc : StartLoc,
|
|
PrevSpec, DiagID, TagOrTempResult.get(), Owned,
|
|
Policy);
|
|
} else {
|
|
DS.SetTypeSpecError();
|
|
return;
|
|
}
|
|
|
|
if (Result)
|
|
Diag(StartLoc, DiagID) << PrevSpec;
|
|
|
|
// At this point, we've successfully parsed a class-specifier in 'definition'
|
|
// form (e.g. "struct foo { int x; }". While we could just return here, we're
|
|
// going to look at what comes after it to improve error recovery. If an
|
|
// impossible token occurs next, we assume that the programmer forgot a ; at
|
|
// the end of the declaration and recover that way.
|
|
//
|
|
// Also enforce C++ [temp]p3:
|
|
// In a template-declaration which defines a class, no declarator
|
|
// is permitted.
|
|
//
|
|
// After a type-specifier, we don't expect a semicolon. This only happens in
|
|
// C, since definitions are not permitted in this context in C++.
|
|
if (TUK == Sema::TUK_Definition &&
|
|
(getLangOpts().CPlusPlus || !isTypeSpecifier(DSC)) &&
|
|
(TemplateInfo.Kind || !isValidAfterTypeSpecifier(false))) {
|
|
if (Tok.isNot(tok::semi)) {
|
|
const PrintingPolicy &PPol = Actions.getASTContext().getPrintingPolicy();
|
|
ExpectAndConsume(tok::semi, diag::err_expected_after,
|
|
DeclSpec::getSpecifierName(TagType, PPol));
|
|
// Push this token back into the preprocessor and change our current token
|
|
// to ';' so that the rest of the code recovers as though there were an
|
|
// ';' after the definition.
|
|
PP.EnterToken(Tok, /*IsReinject=*/true);
|
|
Tok.setKind(tok::semi);
|
|
}
|
|
}
|
|
}
|
|
|
|
/// ParseBaseClause - Parse the base-clause of a C++ class [C++ class.derived].
|
|
///
|
|
/// base-clause : [C++ class.derived]
|
|
/// ':' base-specifier-list
|
|
/// base-specifier-list:
|
|
/// base-specifier '...'[opt]
|
|
/// base-specifier-list ',' base-specifier '...'[opt]
|
|
void Parser::ParseBaseClause(Decl *ClassDecl) {
|
|
assert(Tok.is(tok::colon) && "Not a base clause");
|
|
ConsumeToken();
|
|
|
|
// Build up an array of parsed base specifiers.
|
|
SmallVector<CXXBaseSpecifier *, 8> BaseInfo;
|
|
|
|
while (true) {
|
|
// Parse a base-specifier.
|
|
BaseResult Result = ParseBaseSpecifier(ClassDecl);
|
|
if (Result.isInvalid()) {
|
|
// Skip the rest of this base specifier, up until the comma or
|
|
// opening brace.
|
|
SkipUntil(tok::comma, tok::l_brace, StopAtSemi | StopBeforeMatch);
|
|
} else {
|
|
// Add this to our array of base specifiers.
|
|
BaseInfo.push_back(Result.get());
|
|
}
|
|
|
|
// If the next token is a comma, consume it and keep reading
|
|
// base-specifiers.
|
|
if (!TryConsumeToken(tok::comma))
|
|
break;
|
|
}
|
|
|
|
// Attach the base specifiers
|
|
Actions.ActOnBaseSpecifiers(ClassDecl, BaseInfo);
|
|
}
|
|
|
|
/// ParseBaseSpecifier - Parse a C++ base-specifier. A base-specifier is
|
|
/// one entry in the base class list of a class specifier, for example:
|
|
/// class foo : public bar, virtual private baz {
|
|
/// 'public bar' and 'virtual private baz' are each base-specifiers.
|
|
///
|
|
/// base-specifier: [C++ class.derived]
|
|
/// attribute-specifier-seq[opt] base-type-specifier
|
|
/// attribute-specifier-seq[opt] 'virtual' access-specifier[opt]
|
|
/// base-type-specifier
|
|
/// attribute-specifier-seq[opt] access-specifier 'virtual'[opt]
|
|
/// base-type-specifier
|
|
BaseResult Parser::ParseBaseSpecifier(Decl *ClassDecl) {
|
|
bool IsVirtual = false;
|
|
SourceLocation StartLoc = Tok.getLocation();
|
|
|
|
ParsedAttributesWithRange Attributes(AttrFactory);
|
|
MaybeParseCXX11Attributes(Attributes);
|
|
|
|
// Parse the 'virtual' keyword.
|
|
if (TryConsumeToken(tok::kw_virtual))
|
|
IsVirtual = true;
|
|
|
|
CheckMisplacedCXX11Attribute(Attributes, StartLoc);
|
|
|
|
// Parse an (optional) access specifier.
|
|
AccessSpecifier Access = getAccessSpecifierIfPresent();
|
|
if (Access != AS_none)
|
|
ConsumeToken();
|
|
|
|
CheckMisplacedCXX11Attribute(Attributes, StartLoc);
|
|
|
|
// Parse the 'virtual' keyword (again!), in case it came after the
|
|
// access specifier.
|
|
if (Tok.is(tok::kw_virtual)) {
|
|
SourceLocation VirtualLoc = ConsumeToken();
|
|
if (IsVirtual) {
|
|
// Complain about duplicate 'virtual'
|
|
Diag(VirtualLoc, diag::err_dup_virtual)
|
|
<< FixItHint::CreateRemoval(VirtualLoc);
|
|
}
|
|
|
|
IsVirtual = true;
|
|
}
|
|
|
|
CheckMisplacedCXX11Attribute(Attributes, StartLoc);
|
|
|
|
// Parse the class-name.
|
|
|
|
// HACK: MSVC doesn't consider _Atomic to be a keyword and its STL
|
|
// implementation for VS2013 uses _Atomic as an identifier for one of the
|
|
// classes in <atomic>. Treat '_Atomic' to be an identifier when we are
|
|
// parsing the class-name for a base specifier.
|
|
if (getLangOpts().MSVCCompat && Tok.is(tok::kw__Atomic) &&
|
|
NextToken().is(tok::less))
|
|
Tok.setKind(tok::identifier);
|
|
|
|
SourceLocation EndLocation;
|
|
SourceLocation BaseLoc;
|
|
TypeResult BaseType = ParseBaseTypeSpecifier(BaseLoc, EndLocation);
|
|
if (BaseType.isInvalid())
|
|
return true;
|
|
|
|
// Parse the optional ellipsis (for a pack expansion). The ellipsis is
|
|
// actually part of the base-specifier-list grammar productions, but we
|
|
// parse it here for convenience.
|
|
SourceLocation EllipsisLoc;
|
|
TryConsumeToken(tok::ellipsis, EllipsisLoc);
|
|
|
|
// Find the complete source range for the base-specifier.
|
|
SourceRange Range(StartLoc, EndLocation);
|
|
|
|
// Notify semantic analysis that we have parsed a complete
|
|
// base-specifier.
|
|
return Actions.ActOnBaseSpecifier(ClassDecl, Range, Attributes, IsVirtual,
|
|
Access, BaseType.get(), BaseLoc,
|
|
EllipsisLoc);
|
|
}
|
|
|
|
/// getAccessSpecifierIfPresent - Determine whether the next token is
|
|
/// a C++ access-specifier.
|
|
///
|
|
/// access-specifier: [C++ class.derived]
|
|
/// 'private'
|
|
/// 'protected'
|
|
/// 'public'
|
|
AccessSpecifier Parser::getAccessSpecifierIfPresent() const {
|
|
switch (Tok.getKind()) {
|
|
default: return AS_none;
|
|
case tok::kw_private: return AS_private;
|
|
case tok::kw_protected: return AS_protected;
|
|
case tok::kw_public: return AS_public;
|
|
}
|
|
}
|
|
|
|
/// If the given declarator has any parts for which parsing has to be
|
|
/// delayed, e.g., default arguments or an exception-specification, create a
|
|
/// late-parsed method declaration record to handle the parsing at the end of
|
|
/// the class definition.
|
|
void Parser::HandleMemberFunctionDeclDelays(Declarator& DeclaratorInfo,
|
|
Decl *ThisDecl) {
|
|
DeclaratorChunk::FunctionTypeInfo &FTI
|
|
= DeclaratorInfo.getFunctionTypeInfo();
|
|
// If there was a late-parsed exception-specification, we'll need a
|
|
// late parse
|
|
bool NeedLateParse = FTI.getExceptionSpecType() == EST_Unparsed;
|
|
|
|
if (!NeedLateParse) {
|
|
// Look ahead to see if there are any default args
|
|
for (unsigned ParamIdx = 0; ParamIdx < FTI.NumParams; ++ParamIdx) {
|
|
auto Param = cast<ParmVarDecl>(FTI.Params[ParamIdx].Param);
|
|
if (Param->hasUnparsedDefaultArg()) {
|
|
NeedLateParse = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (NeedLateParse) {
|
|
// Push this method onto the stack of late-parsed method
|
|
// declarations.
|
|
auto LateMethod = new LateParsedMethodDeclaration(this, ThisDecl);
|
|
getCurrentClass().LateParsedDeclarations.push_back(LateMethod);
|
|
|
|
// Push tokens for each parameter. Those that do not have defaults will be
|
|
// NULL. We need to track all the parameters so that we can push them into
|
|
// scope for later parameters and perhaps for the exception specification.
|
|
LateMethod->DefaultArgs.reserve(FTI.NumParams);
|
|
for (unsigned ParamIdx = 0; ParamIdx < FTI.NumParams; ++ParamIdx)
|
|
LateMethod->DefaultArgs.push_back(LateParsedDefaultArgument(
|
|
FTI.Params[ParamIdx].Param,
|
|
std::move(FTI.Params[ParamIdx].DefaultArgTokens)));
|
|
|
|
// Stash the exception-specification tokens in the late-pased method.
|
|
if (FTI.getExceptionSpecType() == EST_Unparsed) {
|
|
LateMethod->ExceptionSpecTokens = FTI.ExceptionSpecTokens;
|
|
FTI.ExceptionSpecTokens = nullptr;
|
|
}
|
|
}
|
|
}
|
|
|
|
/// isCXX11VirtSpecifier - Determine whether the given token is a C++11
|
|
/// virt-specifier.
|
|
///
|
|
/// virt-specifier:
|
|
/// override
|
|
/// final
|
|
/// __final
|
|
VirtSpecifiers::Specifier Parser::isCXX11VirtSpecifier(const Token &Tok) const {
|
|
if (!getLangOpts().CPlusPlus || Tok.isNot(tok::identifier))
|
|
return VirtSpecifiers::VS_None;
|
|
|
|
IdentifierInfo *II = Tok.getIdentifierInfo();
|
|
|
|
// Initialize the contextual keywords.
|
|
if (!Ident_final) {
|
|
Ident_final = &PP.getIdentifierTable().get("final");
|
|
if (getLangOpts().GNUKeywords)
|
|
Ident_GNU_final = &PP.getIdentifierTable().get("__final");
|
|
if (getLangOpts().MicrosoftExt)
|
|
Ident_sealed = &PP.getIdentifierTable().get("sealed");
|
|
Ident_override = &PP.getIdentifierTable().get("override");
|
|
}
|
|
|
|
if (II == Ident_override)
|
|
return VirtSpecifiers::VS_Override;
|
|
|
|
if (II == Ident_sealed)
|
|
return VirtSpecifiers::VS_Sealed;
|
|
|
|
if (II == Ident_final)
|
|
return VirtSpecifiers::VS_Final;
|
|
|
|
if (II == Ident_GNU_final)
|
|
return VirtSpecifiers::VS_GNU_Final;
|
|
|
|
return VirtSpecifiers::VS_None;
|
|
}
|
|
|
|
/// ParseOptionalCXX11VirtSpecifierSeq - Parse a virt-specifier-seq.
|
|
///
|
|
/// virt-specifier-seq:
|
|
/// virt-specifier
|
|
/// virt-specifier-seq virt-specifier
|
|
void Parser::ParseOptionalCXX11VirtSpecifierSeq(VirtSpecifiers &VS,
|
|
bool IsInterface,
|
|
SourceLocation FriendLoc) {
|
|
while (true) {
|
|
VirtSpecifiers::Specifier Specifier = isCXX11VirtSpecifier();
|
|
if (Specifier == VirtSpecifiers::VS_None)
|
|
return;
|
|
|
|
if (FriendLoc.isValid()) {
|
|
Diag(Tok.getLocation(), diag::err_friend_decl_spec)
|
|
<< VirtSpecifiers::getSpecifierName(Specifier)
|
|
<< FixItHint::CreateRemoval(Tok.getLocation())
|
|
<< SourceRange(FriendLoc, FriendLoc);
|
|
ConsumeToken();
|
|
continue;
|
|
}
|
|
|
|
// C++ [class.mem]p8:
|
|
// A virt-specifier-seq shall contain at most one of each virt-specifier.
|
|
const char *PrevSpec = nullptr;
|
|
if (VS.SetSpecifier(Specifier, Tok.getLocation(), PrevSpec))
|
|
Diag(Tok.getLocation(), diag::err_duplicate_virt_specifier)
|
|
<< PrevSpec
|
|
<< FixItHint::CreateRemoval(Tok.getLocation());
|
|
|
|
if (IsInterface && (Specifier == VirtSpecifiers::VS_Final ||
|
|
Specifier == VirtSpecifiers::VS_Sealed)) {
|
|
Diag(Tok.getLocation(), diag::err_override_control_interface)
|
|
<< VirtSpecifiers::getSpecifierName(Specifier);
|
|
} else if (Specifier == VirtSpecifiers::VS_Sealed) {
|
|
Diag(Tok.getLocation(), diag::ext_ms_sealed_keyword);
|
|
} else if (Specifier == VirtSpecifiers::VS_GNU_Final) {
|
|
Diag(Tok.getLocation(), diag::ext_warn_gnu_final);
|
|
} else {
|
|
Diag(Tok.getLocation(),
|
|
getLangOpts().CPlusPlus11
|
|
? diag::warn_cxx98_compat_override_control_keyword
|
|
: diag::ext_override_control_keyword)
|
|
<< VirtSpecifiers::getSpecifierName(Specifier);
|
|
}
|
|
ConsumeToken();
|
|
}
|
|
}
|
|
|
|
/// isCXX11FinalKeyword - Determine whether the next token is a C++11
|
|
/// 'final' or Microsoft 'sealed' contextual keyword.
|
|
bool Parser::isCXX11FinalKeyword() const {
|
|
VirtSpecifiers::Specifier Specifier = isCXX11VirtSpecifier();
|
|
return Specifier == VirtSpecifiers::VS_Final ||
|
|
Specifier == VirtSpecifiers::VS_GNU_Final ||
|
|
Specifier == VirtSpecifiers::VS_Sealed;
|
|
}
|
|
|
|
/// Parse a C++ member-declarator up to, but not including, the optional
|
|
/// brace-or-equal-initializer or pure-specifier.
|
|
bool Parser::ParseCXXMemberDeclaratorBeforeInitializer(
|
|
Declarator &DeclaratorInfo, VirtSpecifiers &VS, ExprResult &BitfieldSize,
|
|
LateParsedAttrList &LateParsedAttrs) {
|
|
// member-declarator:
|
|
// declarator virt-specifier-seq[opt] pure-specifier[opt]
|
|
// declarator requires-clause
|
|
// declarator brace-or-equal-initializer[opt]
|
|
// identifier attribute-specifier-seq[opt] ':' constant-expression
|
|
// brace-or-equal-initializer[opt]
|
|
// ':' constant-expression
|
|
//
|
|
// NOTE: the latter two productions are a proposed bugfix rather than the
|
|
// current grammar rules as of C++20.
|
|
if (Tok.isNot(tok::colon))
|
|
ParseDeclarator(DeclaratorInfo);
|
|
else
|
|
DeclaratorInfo.SetIdentifier(nullptr, Tok.getLocation());
|
|
|
|
if (!DeclaratorInfo.isFunctionDeclarator() && TryConsumeToken(tok::colon)) {
|
|
assert(DeclaratorInfo.isPastIdentifier() &&
|
|
"don't know where identifier would go yet?");
|
|
BitfieldSize = ParseConstantExpression();
|
|
if (BitfieldSize.isInvalid())
|
|
SkipUntil(tok::comma, StopAtSemi | StopBeforeMatch);
|
|
} else if (Tok.is(tok::kw_requires)) {
|
|
ParseTrailingRequiresClause(DeclaratorInfo);
|
|
} else {
|
|
ParseOptionalCXX11VirtSpecifierSeq(
|
|
VS, getCurrentClass().IsInterface,
|
|
DeclaratorInfo.getDeclSpec().getFriendSpecLoc());
|
|
if (!VS.isUnset())
|
|
MaybeParseAndDiagnoseDeclSpecAfterCXX11VirtSpecifierSeq(DeclaratorInfo, VS);
|
|
}
|
|
|
|
// If a simple-asm-expr is present, parse it.
|
|
if (Tok.is(tok::kw_asm)) {
|
|
SourceLocation Loc;
|
|
ExprResult AsmLabel(ParseSimpleAsm(/*ForAsmLabel*/ true, &Loc));
|
|
if (AsmLabel.isInvalid())
|
|
SkipUntil(tok::comma, StopAtSemi | StopBeforeMatch);
|
|
|
|
DeclaratorInfo.setAsmLabel(AsmLabel.get());
|
|
DeclaratorInfo.SetRangeEnd(Loc);
|
|
}
|
|
|
|
// If attributes exist after the declarator, but before an '{', parse them.
|
|
// However, this does not apply for [[]] attributes (which could show up
|
|
// before or after the __attribute__ attributes).
|
|
DiagnoseAndSkipCXX11Attributes();
|
|
MaybeParseGNUAttributes(DeclaratorInfo, &LateParsedAttrs);
|
|
DiagnoseAndSkipCXX11Attributes();
|
|
|
|
// For compatibility with code written to older Clang, also accept a
|
|
// virt-specifier *after* the GNU attributes.
|
|
if (BitfieldSize.isUnset() && VS.isUnset()) {
|
|
ParseOptionalCXX11VirtSpecifierSeq(
|
|
VS, getCurrentClass().IsInterface,
|
|
DeclaratorInfo.getDeclSpec().getFriendSpecLoc());
|
|
if (!VS.isUnset()) {
|
|
// If we saw any GNU-style attributes that are known to GCC followed by a
|
|
// virt-specifier, issue a GCC-compat warning.
|
|
for (const ParsedAttr &AL : DeclaratorInfo.getAttributes())
|
|
if (AL.isKnownToGCC() && !AL.isCXX11Attribute())
|
|
Diag(AL.getLoc(), diag::warn_gcc_attribute_location);
|
|
|
|
MaybeParseAndDiagnoseDeclSpecAfterCXX11VirtSpecifierSeq(DeclaratorInfo, VS);
|
|
}
|
|
}
|
|
|
|
// If this has neither a name nor a bit width, something has gone seriously
|
|
// wrong. Skip until the semi-colon or }.
|
|
if (!DeclaratorInfo.hasName() && BitfieldSize.isUnset()) {
|
|
// If so, skip until the semi-colon or a }.
|
|
SkipUntil(tok::r_brace, StopAtSemi | StopBeforeMatch);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/// Look for declaration specifiers possibly occurring after C++11
|
|
/// virt-specifier-seq and diagnose them.
|
|
void Parser::MaybeParseAndDiagnoseDeclSpecAfterCXX11VirtSpecifierSeq(
|
|
Declarator &D,
|
|
VirtSpecifiers &VS) {
|
|
DeclSpec DS(AttrFactory);
|
|
|
|
// GNU-style and C++11 attributes are not allowed here, but they will be
|
|
// handled by the caller. Diagnose everything else.
|
|
ParseTypeQualifierListOpt(
|
|
DS, AR_NoAttributesParsed, false,
|
|
/*IdentifierRequired=*/false, llvm::function_ref<void()>([&]() {
|
|
Actions.CodeCompleteFunctionQualifiers(DS, D, &VS);
|
|
}));
|
|
D.ExtendWithDeclSpec(DS);
|
|
|
|
if (D.isFunctionDeclarator()) {
|
|
auto &Function = D.getFunctionTypeInfo();
|
|
if (DS.getTypeQualifiers() != DeclSpec::TQ_unspecified) {
|
|
auto DeclSpecCheck = [&](DeclSpec::TQ TypeQual, StringRef FixItName,
|
|
SourceLocation SpecLoc) {
|
|
FixItHint Insertion;
|
|
auto &MQ = Function.getOrCreateMethodQualifiers();
|
|
if (!(MQ.getTypeQualifiers() & TypeQual)) {
|
|
std::string Name(FixItName.data());
|
|
Name += " ";
|
|
Insertion = FixItHint::CreateInsertion(VS.getFirstLocation(), Name);
|
|
MQ.SetTypeQual(TypeQual, SpecLoc);
|
|
}
|
|
Diag(SpecLoc, diag::err_declspec_after_virtspec)
|
|
<< FixItName
|
|
<< VirtSpecifiers::getSpecifierName(VS.getLastSpecifier())
|
|
<< FixItHint::CreateRemoval(SpecLoc) << Insertion;
|
|
};
|
|
DS.forEachQualifier(DeclSpecCheck);
|
|
}
|
|
|
|
// Parse ref-qualifiers.
|
|
bool RefQualifierIsLValueRef = true;
|
|
SourceLocation RefQualifierLoc;
|
|
if (ParseRefQualifier(RefQualifierIsLValueRef, RefQualifierLoc)) {
|
|
const char *Name = (RefQualifierIsLValueRef ? "& " : "&& ");
|
|
FixItHint Insertion = FixItHint::CreateInsertion(VS.getFirstLocation(), Name);
|
|
Function.RefQualifierIsLValueRef = RefQualifierIsLValueRef;
|
|
Function.RefQualifierLoc = RefQualifierLoc.getRawEncoding();
|
|
|
|
Diag(RefQualifierLoc, diag::err_declspec_after_virtspec)
|
|
<< (RefQualifierIsLValueRef ? "&" : "&&")
|
|
<< VirtSpecifiers::getSpecifierName(VS.getLastSpecifier())
|
|
<< FixItHint::CreateRemoval(RefQualifierLoc)
|
|
<< Insertion;
|
|
D.SetRangeEnd(RefQualifierLoc);
|
|
}
|
|
}
|
|
}
|
|
|
|
/// ParseCXXClassMemberDeclaration - Parse a C++ class member declaration.
|
|
///
|
|
/// member-declaration:
|
|
/// decl-specifier-seq[opt] member-declarator-list[opt] ';'
|
|
/// function-definition ';'[opt]
|
|
/// ::[opt] nested-name-specifier template[opt] unqualified-id ';'[TODO]
|
|
/// using-declaration [TODO]
|
|
/// [C++0x] static_assert-declaration
|
|
/// template-declaration
|
|
/// [GNU] '__extension__' member-declaration
|
|
///
|
|
/// member-declarator-list:
|
|
/// member-declarator
|
|
/// member-declarator-list ',' member-declarator
|
|
///
|
|
/// member-declarator:
|
|
/// declarator virt-specifier-seq[opt] pure-specifier[opt]
|
|
/// [C++2a] declarator requires-clause
|
|
/// declarator constant-initializer[opt]
|
|
/// [C++11] declarator brace-or-equal-initializer[opt]
|
|
/// identifier[opt] ':' constant-expression
|
|
///
|
|
/// virt-specifier-seq:
|
|
/// virt-specifier
|
|
/// virt-specifier-seq virt-specifier
|
|
///
|
|
/// virt-specifier:
|
|
/// override
|
|
/// final
|
|
/// [MS] sealed
|
|
///
|
|
/// pure-specifier:
|
|
/// '= 0'
|
|
///
|
|
/// constant-initializer:
|
|
/// '=' constant-expression
|
|
///
|
|
Parser::DeclGroupPtrTy
|
|
Parser::ParseCXXClassMemberDeclaration(AccessSpecifier AS,
|
|
ParsedAttributes &AccessAttrs,
|
|
const ParsedTemplateInfo &TemplateInfo,
|
|
ParsingDeclRAIIObject *TemplateDiags) {
|
|
if (Tok.is(tok::at)) {
|
|
if (getLangOpts().ObjC && NextToken().isObjCAtKeyword(tok::objc_defs))
|
|
Diag(Tok, diag::err_at_defs_cxx);
|
|
else
|
|
Diag(Tok, diag::err_at_in_class);
|
|
|
|
ConsumeToken();
|
|
SkipUntil(tok::r_brace, StopAtSemi);
|
|
return nullptr;
|
|
}
|
|
|
|
// Turn on colon protection early, while parsing declspec, although there is
|
|
// nothing to protect there. It prevents from false errors if error recovery
|
|
// incorrectly determines where the declspec ends, as in the example:
|
|
// struct A { enum class B { C }; };
|
|
// const int C = 4;
|
|
// struct D { A::B : C; };
|
|
ColonProtectionRAIIObject X(*this);
|
|
|
|
// Access declarations.
|
|
bool MalformedTypeSpec = false;
|
|
if (!TemplateInfo.Kind &&
|
|
Tok.isOneOf(tok::identifier, tok::coloncolon, tok::kw___super)) {
|
|
if (TryAnnotateCXXScopeToken())
|
|
MalformedTypeSpec = true;
|
|
|
|
bool isAccessDecl;
|
|
if (Tok.isNot(tok::annot_cxxscope))
|
|
isAccessDecl = false;
|
|
else if (NextToken().is(tok::identifier))
|
|
isAccessDecl = GetLookAheadToken(2).is(tok::semi);
|
|
else
|
|
isAccessDecl = NextToken().is(tok::kw_operator);
|
|
|
|
if (isAccessDecl) {
|
|
// Collect the scope specifier token we annotated earlier.
|
|
CXXScopeSpec SS;
|
|
ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/nullptr,
|
|
/*ObjectHadErrors=*/false,
|
|
/*EnteringContext=*/false);
|
|
|
|
if (SS.isInvalid()) {
|
|
SkipUntil(tok::semi);
|
|
return nullptr;
|
|
}
|
|
|
|
// Try to parse an unqualified-id.
|
|
SourceLocation TemplateKWLoc;
|
|
UnqualifiedId Name;
|
|
if (ParseUnqualifiedId(SS, /*ObjectType=*/nullptr,
|
|
/*ObjectHadErrors=*/false, false, true, true,
|
|
false, &TemplateKWLoc, Name)) {
|
|
SkipUntil(tok::semi);
|
|
return nullptr;
|
|
}
|
|
|
|
// TODO: recover from mistakenly-qualified operator declarations.
|
|
if (ExpectAndConsume(tok::semi, diag::err_expected_after,
|
|
"access declaration")) {
|
|
SkipUntil(tok::semi);
|
|
return nullptr;
|
|
}
|
|
|
|
// FIXME: We should do something with the 'template' keyword here.
|
|
return DeclGroupPtrTy::make(DeclGroupRef(Actions.ActOnUsingDeclaration(
|
|
getCurScope(), AS, /*UsingLoc*/ SourceLocation(),
|
|
/*TypenameLoc*/ SourceLocation(), SS, Name,
|
|
/*EllipsisLoc*/ SourceLocation(),
|
|
/*AttrList*/ ParsedAttributesView())));
|
|
}
|
|
}
|
|
|
|
// static_assert-declaration. A templated static_assert declaration is
|
|
// diagnosed in Parser::ParseSingleDeclarationAfterTemplate.
|
|
if (!TemplateInfo.Kind &&
|
|
Tok.isOneOf(tok::kw_static_assert, tok::kw__Static_assert)) {
|
|
SourceLocation DeclEnd;
|
|
return DeclGroupPtrTy::make(
|
|
DeclGroupRef(ParseStaticAssertDeclaration(DeclEnd)));
|
|
}
|
|
|
|
if (Tok.is(tok::kw_template)) {
|
|
assert(!TemplateInfo.TemplateParams &&
|
|
"Nested template improperly parsed?");
|
|
ObjCDeclContextSwitch ObjCDC(*this);
|
|
SourceLocation DeclEnd;
|
|
return DeclGroupPtrTy::make(
|
|
DeclGroupRef(ParseTemplateDeclarationOrSpecialization(
|
|
DeclaratorContext::Member, DeclEnd, AccessAttrs, AS)));
|
|
}
|
|
|
|
// Handle: member-declaration ::= '__extension__' member-declaration
|
|
if (Tok.is(tok::kw___extension__)) {
|
|
// __extension__ silences extension warnings in the subexpression.
|
|
ExtensionRAIIObject O(Diags); // Use RAII to do this.
|
|
ConsumeToken();
|
|
return ParseCXXClassMemberDeclaration(AS, AccessAttrs,
|
|
TemplateInfo, TemplateDiags);
|
|
}
|
|
|
|
ParsedAttributesWithRange attrs(AttrFactory);
|
|
ParsedAttributesViewWithRange FnAttrs;
|
|
// Optional C++11 attribute-specifier
|
|
MaybeParseCXX11Attributes(attrs);
|
|
// We need to keep these attributes for future diagnostic
|
|
// before they are taken over by declaration specifier.
|
|
FnAttrs.addAll(attrs.begin(), attrs.end());
|
|
FnAttrs.Range = attrs.Range;
|
|
|
|
MaybeParseMicrosoftAttributes(attrs);
|
|
|
|
if (Tok.is(tok::kw_using)) {
|
|
ProhibitAttributes(attrs);
|
|
|
|
// Eat 'using'.
|
|
SourceLocation UsingLoc = ConsumeToken();
|
|
|
|
// Consume unexpected 'template' keywords.
|
|
while (Tok.is(tok::kw_template)) {
|
|
SourceLocation TemplateLoc = ConsumeToken();
|
|
Diag(TemplateLoc, diag::err_unexpected_template_after_using)
|
|
<< FixItHint::CreateRemoval(TemplateLoc);
|
|
}
|
|
|
|
if (Tok.is(tok::kw_namespace)) {
|
|
Diag(UsingLoc, diag::err_using_namespace_in_class);
|
|
SkipUntil(tok::semi, StopBeforeMatch);
|
|
return nullptr;
|
|
}
|
|
SourceLocation DeclEnd;
|
|
// Otherwise, it must be a using-declaration or an alias-declaration.
|
|
return ParseUsingDeclaration(DeclaratorContext::Member, TemplateInfo,
|
|
UsingLoc, DeclEnd, AS);
|
|
}
|
|
|
|
// Hold late-parsed attributes so we can attach a Decl to them later.
|
|
LateParsedAttrList CommonLateParsedAttrs;
|
|
|
|
// decl-specifier-seq:
|
|
// Parse the common declaration-specifiers piece.
|
|
ParsingDeclSpec DS(*this, TemplateDiags);
|
|
DS.takeAttributesFrom(attrs);
|
|
if (MalformedTypeSpec)
|
|
DS.SetTypeSpecError();
|
|
|
|
ParseDeclarationSpecifiers(DS, TemplateInfo, AS, DeclSpecContext::DSC_class,
|
|
&CommonLateParsedAttrs);
|
|
|
|
// Turn off colon protection that was set for declspec.
|
|
X.restore();
|
|
|
|
// If we had a free-standing type definition with a missing semicolon, we
|
|
// may get this far before the problem becomes obvious.
|
|
if (DS.hasTagDefinition() &&
|
|
TemplateInfo.Kind == ParsedTemplateInfo::NonTemplate &&
|
|
DiagnoseMissingSemiAfterTagDefinition(DS, AS, DeclSpecContext::DSC_class,
|
|
&CommonLateParsedAttrs))
|
|
return nullptr;
|
|
|
|
MultiTemplateParamsArg TemplateParams(
|
|
TemplateInfo.TemplateParams? TemplateInfo.TemplateParams->data()
|
|
: nullptr,
|
|
TemplateInfo.TemplateParams? TemplateInfo.TemplateParams->size() : 0);
|
|
|
|
if (TryConsumeToken(tok::semi)) {
|
|
if (DS.isFriendSpecified())
|
|
ProhibitAttributes(FnAttrs);
|
|
|
|
RecordDecl *AnonRecord = nullptr;
|
|
Decl *TheDecl = Actions.ParsedFreeStandingDeclSpec(
|
|
getCurScope(), AS, DS, TemplateParams, false, AnonRecord);
|
|
DS.complete(TheDecl);
|
|
if (AnonRecord) {
|
|
Decl* decls[] = {AnonRecord, TheDecl};
|
|
return Actions.BuildDeclaratorGroup(decls);
|
|
}
|
|
return Actions.ConvertDeclToDeclGroup(TheDecl);
|
|
}
|
|
|
|
ParsingDeclarator DeclaratorInfo(*this, DS, DeclaratorContext::Member);
|
|
if (TemplateInfo.TemplateParams)
|
|
DeclaratorInfo.setTemplateParameterLists(TemplateParams);
|
|
VirtSpecifiers VS;
|
|
|
|
// Hold late-parsed attributes so we can attach a Decl to them later.
|
|
LateParsedAttrList LateParsedAttrs;
|
|
|
|
SourceLocation EqualLoc;
|
|
SourceLocation PureSpecLoc;
|
|
|
|
auto TryConsumePureSpecifier = [&] (bool AllowDefinition) {
|
|
if (Tok.isNot(tok::equal))
|
|
return false;
|
|
|
|
auto &Zero = NextToken();
|
|
SmallString<8> Buffer;
|
|
if (Zero.isNot(tok::numeric_constant) ||
|
|
PP.getSpelling(Zero, Buffer) != "0")
|
|
return false;
|
|
|
|
auto &After = GetLookAheadToken(2);
|
|
if (!After.isOneOf(tok::semi, tok::comma) &&
|
|
!(AllowDefinition &&
|
|
After.isOneOf(tok::l_brace, tok::colon, tok::kw_try)))
|
|
return false;
|
|
|
|
EqualLoc = ConsumeToken();
|
|
PureSpecLoc = ConsumeToken();
|
|
return true;
|
|
};
|
|
|
|
SmallVector<Decl *, 8> DeclsInGroup;
|
|
ExprResult BitfieldSize;
|
|
ExprResult TrailingRequiresClause;
|
|
bool ExpectSemi = true;
|
|
|
|
// Parse the first declarator.
|
|
if (ParseCXXMemberDeclaratorBeforeInitializer(
|
|
DeclaratorInfo, VS, BitfieldSize, LateParsedAttrs)) {
|
|
TryConsumeToken(tok::semi);
|
|
return nullptr;
|
|
}
|
|
|
|
// Check for a member function definition.
|
|
if (BitfieldSize.isUnset()) {
|
|
// MSVC permits pure specifier on inline functions defined at class scope.
|
|
// Hence check for =0 before checking for function definition.
|
|
if (getLangOpts().MicrosoftExt && DeclaratorInfo.isDeclarationOfFunction())
|
|
TryConsumePureSpecifier(/*AllowDefinition*/ true);
|
|
|
|
FunctionDefinitionKind DefinitionKind = FunctionDefinitionKind::Declaration;
|
|
// function-definition:
|
|
//
|
|
// In C++11, a non-function declarator followed by an open brace is a
|
|
// braced-init-list for an in-class member initialization, not an
|
|
// erroneous function definition.
|
|
if (Tok.is(tok::l_brace) && !getLangOpts().CPlusPlus11) {
|
|
DefinitionKind = FunctionDefinitionKind::Definition;
|
|
} else if (DeclaratorInfo.isFunctionDeclarator()) {
|
|
if (Tok.isOneOf(tok::l_brace, tok::colon, tok::kw_try)) {
|
|
DefinitionKind = FunctionDefinitionKind::Definition;
|
|
} else if (Tok.is(tok::equal)) {
|
|
const Token &KW = NextToken();
|
|
if (KW.is(tok::kw_default))
|
|
DefinitionKind = FunctionDefinitionKind::Defaulted;
|
|
else if (KW.is(tok::kw_delete))
|
|
DefinitionKind = FunctionDefinitionKind::Deleted;
|
|
else if (KW.is(tok::code_completion)) {
|
|
Actions.CodeCompleteAfterFunctionEquals(DeclaratorInfo);
|
|
cutOffParsing();
|
|
return nullptr;
|
|
}
|
|
}
|
|
}
|
|
DeclaratorInfo.setFunctionDefinitionKind(DefinitionKind);
|
|
|
|
// C++11 [dcl.attr.grammar] p4: If an attribute-specifier-seq appertains
|
|
// to a friend declaration, that declaration shall be a definition.
|
|
if (DeclaratorInfo.isFunctionDeclarator() &&
|
|
DefinitionKind == FunctionDefinitionKind::Declaration &&
|
|
DS.isFriendSpecified()) {
|
|
// Diagnose attributes that appear before decl specifier:
|
|
// [[]] friend int foo();
|
|
ProhibitAttributes(FnAttrs);
|
|
}
|
|
|
|
if (DefinitionKind != FunctionDefinitionKind::Declaration) {
|
|
if (!DeclaratorInfo.isFunctionDeclarator()) {
|
|
Diag(DeclaratorInfo.getIdentifierLoc(), diag::err_func_def_no_params);
|
|
ConsumeBrace();
|
|
SkipUntil(tok::r_brace);
|
|
|
|
// Consume the optional ';'
|
|
TryConsumeToken(tok::semi);
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
if (DS.getStorageClassSpec() == DeclSpec::SCS_typedef) {
|
|
Diag(DeclaratorInfo.getIdentifierLoc(),
|
|
diag::err_function_declared_typedef);
|
|
|
|
// Recover by treating the 'typedef' as spurious.
|
|
DS.ClearStorageClassSpecs();
|
|
}
|
|
|
|
Decl *FunDecl =
|
|
ParseCXXInlineMethodDef(AS, AccessAttrs, DeclaratorInfo, TemplateInfo,
|
|
VS, PureSpecLoc);
|
|
|
|
if (FunDecl) {
|
|
for (unsigned i = 0, ni = CommonLateParsedAttrs.size(); i < ni; ++i) {
|
|
CommonLateParsedAttrs[i]->addDecl(FunDecl);
|
|
}
|
|
for (unsigned i = 0, ni = LateParsedAttrs.size(); i < ni; ++i) {
|
|
LateParsedAttrs[i]->addDecl(FunDecl);
|
|
}
|
|
}
|
|
LateParsedAttrs.clear();
|
|
|
|
// Consume the ';' - it's optional unless we have a delete or default
|
|
if (Tok.is(tok::semi))
|
|
ConsumeExtraSemi(AfterMemberFunctionDefinition);
|
|
|
|
return DeclGroupPtrTy::make(DeclGroupRef(FunDecl));
|
|
}
|
|
}
|
|
|
|
// member-declarator-list:
|
|
// member-declarator
|
|
// member-declarator-list ',' member-declarator
|
|
|
|
while (1) {
|
|
InClassInitStyle HasInClassInit = ICIS_NoInit;
|
|
bool HasStaticInitializer = false;
|
|
if (Tok.isOneOf(tok::equal, tok::l_brace) && PureSpecLoc.isInvalid()) {
|
|
// DRXXXX: Anonymous bit-fields cannot have a brace-or-equal-initializer.
|
|
if (BitfieldSize.isUsable() && !DeclaratorInfo.hasName()) {
|
|
// Diagnose the error and pretend there is no in-class initializer.
|
|
Diag(Tok, diag::err_anon_bitfield_member_init);
|
|
SkipUntil(tok::comma, StopAtSemi | StopBeforeMatch);
|
|
} else if (DeclaratorInfo.isDeclarationOfFunction()) {
|
|
// It's a pure-specifier.
|
|
if (!TryConsumePureSpecifier(/*AllowFunctionDefinition*/ false))
|
|
// Parse it as an expression so that Sema can diagnose it.
|
|
HasStaticInitializer = true;
|
|
} else if (DeclaratorInfo.getDeclSpec().getStorageClassSpec() !=
|
|
DeclSpec::SCS_static &&
|
|
DeclaratorInfo.getDeclSpec().getStorageClassSpec() !=
|
|
DeclSpec::SCS_typedef &&
|
|
!DS.isFriendSpecified()) {
|
|
// It's a default member initializer.
|
|
if (BitfieldSize.get())
|
|
Diag(Tok, getLangOpts().CPlusPlus20
|
|
? diag::warn_cxx17_compat_bitfield_member_init
|
|
: diag::ext_bitfield_member_init);
|
|
HasInClassInit = Tok.is(tok::equal) ? ICIS_CopyInit : ICIS_ListInit;
|
|
} else {
|
|
HasStaticInitializer = true;
|
|
}
|
|
}
|
|
|
|
// NOTE: If Sema is the Action module and declarator is an instance field,
|
|
// this call will *not* return the created decl; It will return null.
|
|
// See Sema::ActOnCXXMemberDeclarator for details.
|
|
|
|
NamedDecl *ThisDecl = nullptr;
|
|
if (DS.isFriendSpecified()) {
|
|
// C++11 [dcl.attr.grammar] p4: If an attribute-specifier-seq appertains
|
|
// to a friend declaration, that declaration shall be a definition.
|
|
//
|
|
// Diagnose attributes that appear in a friend member function declarator:
|
|
// friend int foo [[]] ();
|
|
SmallVector<SourceRange, 4> Ranges;
|
|
DeclaratorInfo.getCXX11AttributeRanges(Ranges);
|
|
for (SmallVectorImpl<SourceRange>::iterator I = Ranges.begin(),
|
|
E = Ranges.end(); I != E; ++I)
|
|
Diag((*I).getBegin(), diag::err_attributes_not_allowed) << *I;
|
|
|
|
ThisDecl = Actions.ActOnFriendFunctionDecl(getCurScope(), DeclaratorInfo,
|
|
TemplateParams);
|
|
} else {
|
|
ThisDecl = Actions.ActOnCXXMemberDeclarator(getCurScope(), AS,
|
|
DeclaratorInfo,
|
|
TemplateParams,
|
|
BitfieldSize.get(),
|
|
VS, HasInClassInit);
|
|
|
|
if (VarTemplateDecl *VT =
|
|
ThisDecl ? dyn_cast<VarTemplateDecl>(ThisDecl) : nullptr)
|
|
// Re-direct this decl to refer to the templated decl so that we can
|
|
// initialize it.
|
|
ThisDecl = VT->getTemplatedDecl();
|
|
|
|
if (ThisDecl)
|
|
Actions.ProcessDeclAttributeList(getCurScope(), ThisDecl, AccessAttrs);
|
|
}
|
|
|
|
// Error recovery might have converted a non-static member into a static
|
|
// member.
|
|
if (HasInClassInit != ICIS_NoInit &&
|
|
DeclaratorInfo.getDeclSpec().getStorageClassSpec() ==
|
|
DeclSpec::SCS_static) {
|
|
HasInClassInit = ICIS_NoInit;
|
|
HasStaticInitializer = true;
|
|
}
|
|
|
|
if (ThisDecl && PureSpecLoc.isValid())
|
|
Actions.ActOnPureSpecifier(ThisDecl, PureSpecLoc);
|
|
|
|
// Handle the initializer.
|
|
if (HasInClassInit != ICIS_NoInit) {
|
|
// The initializer was deferred; parse it and cache the tokens.
|
|
Diag(Tok, getLangOpts().CPlusPlus11
|
|
? diag::warn_cxx98_compat_nonstatic_member_init
|
|
: diag::ext_nonstatic_member_init);
|
|
|
|
if (DeclaratorInfo.isArrayOfUnknownBound()) {
|
|
// C++11 [dcl.array]p3: An array bound may also be omitted when the
|
|
// declarator is followed by an initializer.
|
|
//
|
|
// A brace-or-equal-initializer for a member-declarator is not an
|
|
// initializer in the grammar, so this is ill-formed.
|
|
Diag(Tok, diag::err_incomplete_array_member_init);
|
|
SkipUntil(tok::comma, StopAtSemi | StopBeforeMatch);
|
|
|
|
// Avoid later warnings about a class member of incomplete type.
|
|
if (ThisDecl)
|
|
ThisDecl->setInvalidDecl();
|
|
} else
|
|
ParseCXXNonStaticMemberInitializer(ThisDecl);
|
|
} else if (HasStaticInitializer) {
|
|
// Normal initializer.
|
|
ExprResult Init = ParseCXXMemberInitializer(
|
|
ThisDecl, DeclaratorInfo.isDeclarationOfFunction(), EqualLoc);
|
|
|
|
if (Init.isInvalid())
|
|
SkipUntil(tok::comma, StopAtSemi | StopBeforeMatch);
|
|
else if (ThisDecl)
|
|
Actions.AddInitializerToDecl(ThisDecl, Init.get(), EqualLoc.isInvalid());
|
|
} else if (ThisDecl && DS.getStorageClassSpec() == DeclSpec::SCS_static)
|
|
// No initializer.
|
|
Actions.ActOnUninitializedDecl(ThisDecl);
|
|
|
|
if (ThisDecl) {
|
|
if (!ThisDecl->isInvalidDecl()) {
|
|
// Set the Decl for any late parsed attributes
|
|
for (unsigned i = 0, ni = CommonLateParsedAttrs.size(); i < ni; ++i)
|
|
CommonLateParsedAttrs[i]->addDecl(ThisDecl);
|
|
|
|
for (unsigned i = 0, ni = LateParsedAttrs.size(); i < ni; ++i)
|
|
LateParsedAttrs[i]->addDecl(ThisDecl);
|
|
}
|
|
Actions.FinalizeDeclaration(ThisDecl);
|
|
DeclsInGroup.push_back(ThisDecl);
|
|
|
|
if (DeclaratorInfo.isFunctionDeclarator() &&
|
|
DeclaratorInfo.getDeclSpec().getStorageClassSpec() !=
|
|
DeclSpec::SCS_typedef)
|
|
HandleMemberFunctionDeclDelays(DeclaratorInfo, ThisDecl);
|
|
}
|
|
LateParsedAttrs.clear();
|
|
|
|
DeclaratorInfo.complete(ThisDecl);
|
|
|
|
// If we don't have a comma, it is either the end of the list (a ';')
|
|
// or an error, bail out.
|
|
SourceLocation CommaLoc;
|
|
if (!TryConsumeToken(tok::comma, CommaLoc))
|
|
break;
|
|
|
|
if (Tok.isAtStartOfLine() &&
|
|
!MightBeDeclarator(DeclaratorContext::Member)) {
|
|
// This comma was followed by a line-break and something which can't be
|
|
// the start of a declarator. The comma was probably a typo for a
|
|
// semicolon.
|
|
Diag(CommaLoc, diag::err_expected_semi_declaration)
|
|
<< FixItHint::CreateReplacement(CommaLoc, ";");
|
|
ExpectSemi = false;
|
|
break;
|
|
}
|
|
|
|
// Parse the next declarator.
|
|
DeclaratorInfo.clear();
|
|
VS.clear();
|
|
BitfieldSize = ExprResult(/*Invalid=*/false);
|
|
EqualLoc = PureSpecLoc = SourceLocation();
|
|
DeclaratorInfo.setCommaLoc(CommaLoc);
|
|
|
|
// GNU attributes are allowed before the second and subsequent declarator.
|
|
// However, this does not apply for [[]] attributes (which could show up
|
|
// before or after the __attribute__ attributes).
|
|
DiagnoseAndSkipCXX11Attributes();
|
|
MaybeParseGNUAttributes(DeclaratorInfo);
|
|
DiagnoseAndSkipCXX11Attributes();
|
|
|
|
if (ParseCXXMemberDeclaratorBeforeInitializer(
|
|
DeclaratorInfo, VS, BitfieldSize, LateParsedAttrs))
|
|
break;
|
|
}
|
|
|
|
if (ExpectSemi &&
|
|
ExpectAndConsume(tok::semi, diag::err_expected_semi_decl_list)) {
|
|
// Skip to end of block or statement.
|
|
SkipUntil(tok::r_brace, StopAtSemi | StopBeforeMatch);
|
|
// If we stopped at a ';', eat it.
|
|
TryConsumeToken(tok::semi);
|
|
return nullptr;
|
|
}
|
|
|
|
return Actions.FinalizeDeclaratorGroup(getCurScope(), DS, DeclsInGroup);
|
|
}
|
|
|
|
/// ParseCXXMemberInitializer - Parse the brace-or-equal-initializer.
|
|
/// Also detect and reject any attempted defaulted/deleted function definition.
|
|
/// The location of the '=', if any, will be placed in EqualLoc.
|
|
///
|
|
/// This does not check for a pure-specifier; that's handled elsewhere.
|
|
///
|
|
/// brace-or-equal-initializer:
|
|
/// '=' initializer-expression
|
|
/// braced-init-list
|
|
///
|
|
/// initializer-clause:
|
|
/// assignment-expression
|
|
/// braced-init-list
|
|
///
|
|
/// defaulted/deleted function-definition:
|
|
/// '=' 'default'
|
|
/// '=' 'delete'
|
|
///
|
|
/// Prior to C++0x, the assignment-expression in an initializer-clause must
|
|
/// be a constant-expression.
|
|
ExprResult Parser::ParseCXXMemberInitializer(Decl *D, bool IsFunction,
|
|
SourceLocation &EqualLoc) {
|
|
assert(Tok.isOneOf(tok::equal, tok::l_brace)
|
|
&& "Data member initializer not starting with '=' or '{'");
|
|
|
|
EnterExpressionEvaluationContext Context(
|
|
Actions, Sema::ExpressionEvaluationContext::PotentiallyEvaluated, D);
|
|
if (TryConsumeToken(tok::equal, EqualLoc)) {
|
|
if (Tok.is(tok::kw_delete)) {
|
|
// In principle, an initializer of '= delete p;' is legal, but it will
|
|
// never type-check. It's better to diagnose it as an ill-formed expression
|
|
// than as an ill-formed deleted non-function member.
|
|
// An initializer of '= delete p, foo' will never be parsed, because
|
|
// a top-level comma always ends the initializer expression.
|
|
const Token &Next = NextToken();
|
|
if (IsFunction || Next.isOneOf(tok::semi, tok::comma, tok::eof)) {
|
|
if (IsFunction)
|
|
Diag(ConsumeToken(), diag::err_default_delete_in_multiple_declaration)
|
|
<< 1 /* delete */;
|
|
else
|
|
Diag(ConsumeToken(), diag::err_deleted_non_function);
|
|
return ExprError();
|
|
}
|
|
} else if (Tok.is(tok::kw_default)) {
|
|
if (IsFunction)
|
|
Diag(Tok, diag::err_default_delete_in_multiple_declaration)
|
|
<< 0 /* default */;
|
|
else
|
|
Diag(ConsumeToken(), diag::err_default_special_members)
|
|
<< getLangOpts().CPlusPlus20;
|
|
return ExprError();
|
|
}
|
|
}
|
|
if (const auto *PD = dyn_cast_or_null<MSPropertyDecl>(D)) {
|
|
Diag(Tok, diag::err_ms_property_initializer) << PD;
|
|
return ExprError();
|
|
}
|
|
return ParseInitializer();
|
|
}
|
|
|
|
void Parser::SkipCXXMemberSpecification(SourceLocation RecordLoc,
|
|
SourceLocation AttrFixitLoc,
|
|
unsigned TagType, Decl *TagDecl) {
|
|
// Skip the optional 'final' keyword.
|
|
if (getLangOpts().CPlusPlus && Tok.is(tok::identifier)) {
|
|
assert(isCXX11FinalKeyword() && "not a class definition");
|
|
ConsumeToken();
|
|
|
|
// Diagnose any C++11 attributes after 'final' keyword.
|
|
// We deliberately discard these attributes.
|
|
ParsedAttributesWithRange Attrs(AttrFactory);
|
|
CheckMisplacedCXX11Attribute(Attrs, AttrFixitLoc);
|
|
|
|
// This can only happen if we had malformed misplaced attributes;
|
|
// we only get called if there is a colon or left-brace after the
|
|
// attributes.
|
|
if (Tok.isNot(tok::colon) && Tok.isNot(tok::l_brace))
|
|
return;
|
|
}
|
|
|
|
// Skip the base clauses. This requires actually parsing them, because
|
|
// otherwise we can't be sure where they end (a left brace may appear
|
|
// within a template argument).
|
|
if (Tok.is(tok::colon)) {
|
|
// Enter the scope of the class so that we can correctly parse its bases.
|
|
ParseScope ClassScope(this, Scope::ClassScope|Scope::DeclScope);
|
|
ParsingClassDefinition ParsingDef(*this, TagDecl, /*NonNestedClass*/ true,
|
|
TagType == DeclSpec::TST_interface);
|
|
auto OldContext =
|
|
Actions.ActOnTagStartSkippedDefinition(getCurScope(), TagDecl);
|
|
|
|
// Parse the bases but don't attach them to the class.
|
|
ParseBaseClause(nullptr);
|
|
|
|
Actions.ActOnTagFinishSkippedDefinition(OldContext);
|
|
|
|
if (!Tok.is(tok::l_brace)) {
|
|
Diag(PP.getLocForEndOfToken(PrevTokLocation),
|
|
diag::err_expected_lbrace_after_base_specifiers);
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Skip the body.
|
|
assert(Tok.is(tok::l_brace));
|
|
BalancedDelimiterTracker T(*this, tok::l_brace);
|
|
T.consumeOpen();
|
|
T.skipToEnd();
|
|
|
|
// Parse and discard any trailing attributes.
|
|
ParsedAttributes Attrs(AttrFactory);
|
|
if (Tok.is(tok::kw___attribute))
|
|
MaybeParseGNUAttributes(Attrs);
|
|
}
|
|
|
|
Parser::DeclGroupPtrTy Parser::ParseCXXClassMemberDeclarationWithPragmas(
|
|
AccessSpecifier &AS, ParsedAttributesWithRange &AccessAttrs,
|
|
DeclSpec::TST TagType, Decl *TagDecl) {
|
|
ParenBraceBracketBalancer BalancerRAIIObj(*this);
|
|
|
|
switch (Tok.getKind()) {
|
|
case tok::kw___if_exists:
|
|
case tok::kw___if_not_exists:
|
|
ParseMicrosoftIfExistsClassDeclaration(TagType, AccessAttrs, AS);
|
|
return nullptr;
|
|
|
|
case tok::semi:
|
|
// Check for extraneous top-level semicolon.
|
|
ConsumeExtraSemi(InsideStruct, TagType);
|
|
return nullptr;
|
|
|
|
// Handle pragmas that can appear as member declarations.
|
|
case tok::annot_pragma_vis:
|
|
HandlePragmaVisibility();
|
|
return nullptr;
|
|
case tok::annot_pragma_pack:
|
|
HandlePragmaPack();
|
|
return nullptr;
|
|
case tok::annot_pragma_align:
|
|
HandlePragmaAlign();
|
|
return nullptr;
|
|
case tok::annot_pragma_ms_pointers_to_members:
|
|
HandlePragmaMSPointersToMembers();
|
|
return nullptr;
|
|
case tok::annot_pragma_ms_pragma:
|
|
HandlePragmaMSPragma();
|
|
return nullptr;
|
|
case tok::annot_pragma_ms_vtordisp:
|
|
HandlePragmaMSVtorDisp();
|
|
return nullptr;
|
|
case tok::annot_pragma_dump:
|
|
HandlePragmaDump();
|
|
return nullptr;
|
|
|
|
case tok::kw_namespace:
|
|
// If we see a namespace here, a close brace was missing somewhere.
|
|
DiagnoseUnexpectedNamespace(cast<NamedDecl>(TagDecl));
|
|
return nullptr;
|
|
|
|
case tok::kw_private:
|
|
// FIXME: We don't accept GNU attributes on access specifiers in OpenCL mode
|
|
// yet.
|
|
if (getLangOpts().OpenCL && !NextToken().is(tok::colon))
|
|
return ParseCXXClassMemberDeclaration(AS, AccessAttrs);
|
|
LLVM_FALLTHROUGH;
|
|
case tok::kw_public:
|
|
case tok::kw_protected: {
|
|
AccessSpecifier NewAS = getAccessSpecifierIfPresent();
|
|
assert(NewAS != AS_none);
|
|
// Current token is a C++ access specifier.
|
|
AS = NewAS;
|
|
SourceLocation ASLoc = Tok.getLocation();
|
|
unsigned TokLength = Tok.getLength();
|
|
ConsumeToken();
|
|
AccessAttrs.clear();
|
|
MaybeParseGNUAttributes(AccessAttrs);
|
|
|
|
SourceLocation EndLoc;
|
|
if (TryConsumeToken(tok::colon, EndLoc)) {
|
|
} else if (TryConsumeToken(tok::semi, EndLoc)) {
|
|
Diag(EndLoc, diag::err_expected)
|
|
<< tok::colon << FixItHint::CreateReplacement(EndLoc, ":");
|
|
} else {
|
|
EndLoc = ASLoc.getLocWithOffset(TokLength);
|
|
Diag(EndLoc, diag::err_expected)
|
|
<< tok::colon << FixItHint::CreateInsertion(EndLoc, ":");
|
|
}
|
|
|
|
// The Microsoft extension __interface does not permit non-public
|
|
// access specifiers.
|
|
if (TagType == DeclSpec::TST_interface && AS != AS_public) {
|
|
Diag(ASLoc, diag::err_access_specifier_interface) << (AS == AS_protected);
|
|
}
|
|
|
|
if (Actions.ActOnAccessSpecifier(NewAS, ASLoc, EndLoc, AccessAttrs)) {
|
|
// found another attribute than only annotations
|
|
AccessAttrs.clear();
|
|
}
|
|
|
|
return nullptr;
|
|
}
|
|
|
|
case tok::annot_pragma_openmp:
|
|
return ParseOpenMPDeclarativeDirectiveWithExtDecl(
|
|
AS, AccessAttrs, /*Delayed=*/true, TagType, TagDecl);
|
|
|
|
default:
|
|
if (tok::isPragmaAnnotation(Tok.getKind())) {
|
|
Diag(Tok.getLocation(), diag::err_pragma_misplaced_in_decl)
|
|
<< DeclSpec::getSpecifierName(TagType,
|
|
Actions.getASTContext().getPrintingPolicy());
|
|
ConsumeAnnotationToken();
|
|
return nullptr;
|
|
}
|
|
return ParseCXXClassMemberDeclaration(AS, AccessAttrs);
|
|
}
|
|
}
|
|
|
|
/// ParseCXXMemberSpecification - Parse the class definition.
|
|
///
|
|
/// member-specification:
|
|
/// member-declaration member-specification[opt]
|
|
/// access-specifier ':' member-specification[opt]
|
|
///
|
|
void Parser::ParseCXXMemberSpecification(SourceLocation RecordLoc,
|
|
SourceLocation AttrFixitLoc,
|
|
ParsedAttributesWithRange &Attrs,
|
|
unsigned TagType, Decl *TagDecl) {
|
|
assert((TagType == DeclSpec::TST_struct ||
|
|
TagType == DeclSpec::TST_interface ||
|
|
TagType == DeclSpec::TST_union ||
|
|
TagType == DeclSpec::TST_class) && "Invalid TagType!");
|
|
|
|
llvm::TimeTraceScope TimeScope("ParseClass", [&]() {
|
|
if (auto *TD = dyn_cast_or_null<NamedDecl>(TagDecl))
|
|
return TD->getQualifiedNameAsString();
|
|
return std::string("<anonymous>");
|
|
});
|
|
|
|
PrettyDeclStackTraceEntry CrashInfo(Actions.Context, TagDecl, RecordLoc,
|
|
"parsing struct/union/class body");
|
|
|
|
// Determine whether this is a non-nested class. Note that local
|
|
// classes are *not* considered to be nested classes.
|
|
bool NonNestedClass = true;
|
|
if (!ClassStack.empty()) {
|
|
for (const Scope *S = getCurScope(); S; S = S->getParent()) {
|
|
if (S->isClassScope()) {
|
|
// We're inside a class scope, so this is a nested class.
|
|
NonNestedClass = false;
|
|
|
|
// The Microsoft extension __interface does not permit nested classes.
|
|
if (getCurrentClass().IsInterface) {
|
|
Diag(RecordLoc, diag::err_invalid_member_in_interface)
|
|
<< /*ErrorType=*/6
|
|
<< (isa<NamedDecl>(TagDecl)
|
|
? cast<NamedDecl>(TagDecl)->getQualifiedNameAsString()
|
|
: "(anonymous)");
|
|
}
|
|
break;
|
|
}
|
|
|
|
if ((S->getFlags() & Scope::FnScope))
|
|
// If we're in a function or function template then this is a local
|
|
// class rather than a nested class.
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Enter a scope for the class.
|
|
ParseScope ClassScope(this, Scope::ClassScope|Scope::DeclScope);
|
|
|
|
// Note that we are parsing a new (potentially-nested) class definition.
|
|
ParsingClassDefinition ParsingDef(*this, TagDecl, NonNestedClass,
|
|
TagType == DeclSpec::TST_interface);
|
|
|
|
if (TagDecl)
|
|
Actions.ActOnTagStartDefinition(getCurScope(), TagDecl);
|
|
|
|
SourceLocation FinalLoc;
|
|
bool IsFinalSpelledSealed = false;
|
|
|
|
// Parse the optional 'final' keyword.
|
|
if (getLangOpts().CPlusPlus && Tok.is(tok::identifier)) {
|
|
VirtSpecifiers::Specifier Specifier = isCXX11VirtSpecifier(Tok);
|
|
assert((Specifier == VirtSpecifiers::VS_Final ||
|
|
Specifier == VirtSpecifiers::VS_GNU_Final ||
|
|
Specifier == VirtSpecifiers::VS_Sealed) &&
|
|
"not a class definition");
|
|
FinalLoc = ConsumeToken();
|
|
IsFinalSpelledSealed = Specifier == VirtSpecifiers::VS_Sealed;
|
|
|
|
if (TagType == DeclSpec::TST_interface)
|
|
Diag(FinalLoc, diag::err_override_control_interface)
|
|
<< VirtSpecifiers::getSpecifierName(Specifier);
|
|
else if (Specifier == VirtSpecifiers::VS_Final)
|
|
Diag(FinalLoc, getLangOpts().CPlusPlus11
|
|
? diag::warn_cxx98_compat_override_control_keyword
|
|
: diag::ext_override_control_keyword)
|
|
<< VirtSpecifiers::getSpecifierName(Specifier);
|
|
else if (Specifier == VirtSpecifiers::VS_Sealed)
|
|
Diag(FinalLoc, diag::ext_ms_sealed_keyword);
|
|
else if (Specifier == VirtSpecifiers::VS_GNU_Final)
|
|
Diag(FinalLoc, diag::ext_warn_gnu_final);
|
|
|
|
// Parse any C++11 attributes after 'final' keyword.
|
|
// These attributes are not allowed to appear here,
|
|
// and the only possible place for them to appertain
|
|
// to the class would be between class-key and class-name.
|
|
CheckMisplacedCXX11Attribute(Attrs, AttrFixitLoc);
|
|
|
|
// ParseClassSpecifier() does only a superficial check for attributes before
|
|
// deciding to call this method. For example, for
|
|
// `class C final alignas ([l) {` it will decide that this looks like a
|
|
// misplaced attribute since it sees `alignas '(' ')'`. But the actual
|
|
// attribute parsing code will try to parse the '[' as a constexpr lambda
|
|
// and consume enough tokens that the alignas parsing code will eat the
|
|
// opening '{'. So bail out if the next token isn't one we expect.
|
|
if (!Tok.is(tok::colon) && !Tok.is(tok::l_brace)) {
|
|
if (TagDecl)
|
|
Actions.ActOnTagDefinitionError(getCurScope(), TagDecl);
|
|
return;
|
|
}
|
|
}
|
|
|
|
if (Tok.is(tok::colon)) {
|
|
ParseScope InheritanceScope(this, getCurScope()->getFlags() |
|
|
Scope::ClassInheritanceScope);
|
|
|
|
ParseBaseClause(TagDecl);
|
|
if (!Tok.is(tok::l_brace)) {
|
|
bool SuggestFixIt = false;
|
|
SourceLocation BraceLoc = PP.getLocForEndOfToken(PrevTokLocation);
|
|
if (Tok.isAtStartOfLine()) {
|
|
switch (Tok.getKind()) {
|
|
case tok::kw_private:
|
|
case tok::kw_protected:
|
|
case tok::kw_public:
|
|
SuggestFixIt = NextToken().getKind() == tok::colon;
|
|
break;
|
|
case tok::kw_static_assert:
|
|
case tok::r_brace:
|
|
case tok::kw_using:
|
|
// base-clause can have simple-template-id; 'template' can't be there
|
|
case tok::kw_template:
|
|
SuggestFixIt = true;
|
|
break;
|
|
case tok::identifier:
|
|
SuggestFixIt = isConstructorDeclarator(true);
|
|
break;
|
|
default:
|
|
SuggestFixIt = isCXXSimpleDeclaration(/*AllowForRangeDecl=*/false);
|
|
break;
|
|
}
|
|
}
|
|
DiagnosticBuilder LBraceDiag =
|
|
Diag(BraceLoc, diag::err_expected_lbrace_after_base_specifiers);
|
|
if (SuggestFixIt) {
|
|
LBraceDiag << FixItHint::CreateInsertion(BraceLoc, " {");
|
|
// Try recovering from missing { after base-clause.
|
|
PP.EnterToken(Tok, /*IsReinject*/true);
|
|
Tok.setKind(tok::l_brace);
|
|
} else {
|
|
if (TagDecl)
|
|
Actions.ActOnTagDefinitionError(getCurScope(), TagDecl);
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
assert(Tok.is(tok::l_brace));
|
|
BalancedDelimiterTracker T(*this, tok::l_brace);
|
|
T.consumeOpen();
|
|
|
|
if (TagDecl)
|
|
Actions.ActOnStartCXXMemberDeclarations(getCurScope(), TagDecl, FinalLoc,
|
|
IsFinalSpelledSealed,
|
|
T.getOpenLocation());
|
|
|
|
// C++ 11p3: Members of a class defined with the keyword class are private
|
|
// by default. Members of a class defined with the keywords struct or union
|
|
// are public by default.
|
|
AccessSpecifier CurAS;
|
|
if (TagType == DeclSpec::TST_class)
|
|
CurAS = AS_private;
|
|
else
|
|
CurAS = AS_public;
|
|
ParsedAttributesWithRange AccessAttrs(AttrFactory);
|
|
|
|
if (TagDecl) {
|
|
// While we still have something to read, read the member-declarations.
|
|
while (!tryParseMisplacedModuleImport() && Tok.isNot(tok::r_brace) &&
|
|
Tok.isNot(tok::eof)) {
|
|
// Each iteration of this loop reads one member-declaration.
|
|
ParseCXXClassMemberDeclarationWithPragmas(
|
|
CurAS, AccessAttrs, static_cast<DeclSpec::TST>(TagType), TagDecl);
|
|
MaybeDestroyTemplateIds();
|
|
}
|
|
T.consumeClose();
|
|
} else {
|
|
SkipUntil(tok::r_brace);
|
|
}
|
|
|
|
// If attributes exist after class contents, parse them.
|
|
ParsedAttributes attrs(AttrFactory);
|
|
MaybeParseGNUAttributes(attrs);
|
|
|
|
if (TagDecl)
|
|
Actions.ActOnFinishCXXMemberSpecification(getCurScope(), RecordLoc, TagDecl,
|
|
T.getOpenLocation(),
|
|
T.getCloseLocation(), attrs);
|
|
|
|
// C++11 [class.mem]p2:
|
|
// Within the class member-specification, the class is regarded as complete
|
|
// within function bodies, default arguments, exception-specifications, and
|
|
// brace-or-equal-initializers for non-static data members (including such
|
|
// things in nested classes).
|
|
if (TagDecl && NonNestedClass) {
|
|
// We are not inside a nested class. This class and its nested classes
|
|
// are complete and we can parse the delayed portions of method
|
|
// declarations and the lexed inline method definitions, along with any
|
|
// delayed attributes.
|
|
|
|
// Save the state of Sema.FPFeatures, and change the setting
|
|
// to the levels specified on the command line. Previous level
|
|
// will be restored when the RAII object is destroyed.
|
|
Sema::FPFeaturesStateRAII SaveFPFeaturesState(Actions);
|
|
FPOptionsOverride NewOverrides;
|
|
Actions.CurFPFeatures = NewOverrides.applyOverrides(getLangOpts());
|
|
Actions.FpPragmaStack.Act(Tok.getLocation(), Sema::PSK_Reset, StringRef(),
|
|
{} /*unused*/);
|
|
|
|
SourceLocation SavedPrevTokLocation = PrevTokLocation;
|
|
ParseLexedPragmas(getCurrentClass());
|
|
ParseLexedAttributes(getCurrentClass());
|
|
ParseLexedMethodDeclarations(getCurrentClass());
|
|
|
|
// We've finished with all pending member declarations.
|
|
Actions.ActOnFinishCXXMemberDecls();
|
|
|
|
ParseLexedMemberInitializers(getCurrentClass());
|
|
ParseLexedMethodDefs(getCurrentClass());
|
|
PrevTokLocation = SavedPrevTokLocation;
|
|
|
|
// We've finished parsing everything, including default argument
|
|
// initializers.
|
|
Actions.ActOnFinishCXXNonNestedClass();
|
|
}
|
|
|
|
if (TagDecl)
|
|
Actions.ActOnTagFinishDefinition(getCurScope(), TagDecl, T.getRange());
|
|
|
|
// Leave the class scope.
|
|
ParsingDef.Pop();
|
|
ClassScope.Exit();
|
|
}
|
|
|
|
void Parser::DiagnoseUnexpectedNamespace(NamedDecl *D) {
|
|
assert(Tok.is(tok::kw_namespace));
|
|
|
|
// FIXME: Suggest where the close brace should have gone by looking
|
|
// at indentation changes within the definition body.
|
|
Diag(D->getLocation(),
|
|
diag::err_missing_end_of_definition) << D;
|
|
Diag(Tok.getLocation(),
|
|
diag::note_missing_end_of_definition_before) << D;
|
|
|
|
// Push '};' onto the token stream to recover.
|
|
PP.EnterToken(Tok, /*IsReinject*/ true);
|
|
|
|
Tok.startToken();
|
|
Tok.setLocation(PP.getLocForEndOfToken(PrevTokLocation));
|
|
Tok.setKind(tok::semi);
|
|
PP.EnterToken(Tok, /*IsReinject*/ true);
|
|
|
|
Tok.setKind(tok::r_brace);
|
|
}
|
|
|
|
/// ParseConstructorInitializer - Parse a C++ constructor initializer,
|
|
/// which explicitly initializes the members or base classes of a
|
|
/// class (C++ [class.base.init]). For example, the three initializers
|
|
/// after the ':' in the Derived constructor below:
|
|
///
|
|
/// @code
|
|
/// class Base { };
|
|
/// class Derived : Base {
|
|
/// int x;
|
|
/// float f;
|
|
/// public:
|
|
/// Derived(float f) : Base(), x(17), f(f) { }
|
|
/// };
|
|
/// @endcode
|
|
///
|
|
/// [C++] ctor-initializer:
|
|
/// ':' mem-initializer-list
|
|
///
|
|
/// [C++] mem-initializer-list:
|
|
/// mem-initializer ...[opt]
|
|
/// mem-initializer ...[opt] , mem-initializer-list
|
|
void Parser::ParseConstructorInitializer(Decl *ConstructorDecl) {
|
|
assert(Tok.is(tok::colon) &&
|
|
"Constructor initializer always starts with ':'");
|
|
|
|
// Poison the SEH identifiers so they are flagged as illegal in constructor
|
|
// initializers.
|
|
PoisonSEHIdentifiersRAIIObject PoisonSEHIdentifiers(*this, true);
|
|
SourceLocation ColonLoc = ConsumeToken();
|
|
|
|
SmallVector<CXXCtorInitializer*, 4> MemInitializers;
|
|
bool AnyErrors = false;
|
|
|
|
do {
|
|
if (Tok.is(tok::code_completion)) {
|
|
Actions.CodeCompleteConstructorInitializer(ConstructorDecl,
|
|
MemInitializers);
|
|
return cutOffParsing();
|
|
}
|
|
|
|
MemInitResult MemInit = ParseMemInitializer(ConstructorDecl);
|
|
if (!MemInit.isInvalid())
|
|
MemInitializers.push_back(MemInit.get());
|
|
else
|
|
AnyErrors = true;
|
|
|
|
if (Tok.is(tok::comma))
|
|
ConsumeToken();
|
|
else if (Tok.is(tok::l_brace))
|
|
break;
|
|
// If the previous initializer was valid and the next token looks like a
|
|
// base or member initializer, assume that we're just missing a comma.
|
|
else if (!MemInit.isInvalid() &&
|
|
Tok.isOneOf(tok::identifier, tok::coloncolon)) {
|
|
SourceLocation Loc = PP.getLocForEndOfToken(PrevTokLocation);
|
|
Diag(Loc, diag::err_ctor_init_missing_comma)
|
|
<< FixItHint::CreateInsertion(Loc, ", ");
|
|
} else {
|
|
// Skip over garbage, until we get to '{'. Don't eat the '{'.
|
|
if (!MemInit.isInvalid())
|
|
Diag(Tok.getLocation(), diag::err_expected_either) << tok::l_brace
|
|
<< tok::comma;
|
|
SkipUntil(tok::l_brace, StopAtSemi | StopBeforeMatch);
|
|
break;
|
|
}
|
|
} while (true);
|
|
|
|
Actions.ActOnMemInitializers(ConstructorDecl, ColonLoc, MemInitializers,
|
|
AnyErrors);
|
|
}
|
|
|
|
/// ParseMemInitializer - Parse a C++ member initializer, which is
|
|
/// part of a constructor initializer that explicitly initializes one
|
|
/// member or base class (C++ [class.base.init]). See
|
|
/// ParseConstructorInitializer for an example.
|
|
///
|
|
/// [C++] mem-initializer:
|
|
/// mem-initializer-id '(' expression-list[opt] ')'
|
|
/// [C++0x] mem-initializer-id braced-init-list
|
|
///
|
|
/// [C++] mem-initializer-id:
|
|
/// '::'[opt] nested-name-specifier[opt] class-name
|
|
/// identifier
|
|
MemInitResult Parser::ParseMemInitializer(Decl *ConstructorDecl) {
|
|
// parse '::'[opt] nested-name-specifier[opt]
|
|
CXXScopeSpec SS;
|
|
if (ParseOptionalCXXScopeSpecifier(SS, /*ObjectType=*/nullptr,
|
|
/*ObjectHadErrors=*/false,
|
|
/*EnteringContext=*/false))
|
|
return true;
|
|
|
|
// : identifier
|
|
IdentifierInfo *II = nullptr;
|
|
SourceLocation IdLoc = Tok.getLocation();
|
|
// : declype(...)
|
|
DeclSpec DS(AttrFactory);
|
|
// : template_name<...>
|
|
TypeResult TemplateTypeTy;
|
|
|
|
if (Tok.is(tok::identifier)) {
|
|
// Get the identifier. This may be a member name or a class name,
|
|
// but we'll let the semantic analysis determine which it is.
|
|
II = Tok.getIdentifierInfo();
|
|
ConsumeToken();
|
|
} else if (Tok.is(tok::annot_decltype)) {
|
|
// Get the decltype expression, if there is one.
|
|
// Uses of decltype will already have been converted to annot_decltype by
|
|
// ParseOptionalCXXScopeSpecifier at this point.
|
|
// FIXME: Can we get here with a scope specifier?
|
|
ParseDecltypeSpecifier(DS);
|
|
} else {
|
|
TemplateIdAnnotation *TemplateId = Tok.is(tok::annot_template_id)
|
|
? takeTemplateIdAnnotation(Tok)
|
|
: nullptr;
|
|
if (TemplateId && TemplateId->mightBeType()) {
|
|
AnnotateTemplateIdTokenAsType(SS, /*IsClassName*/true);
|
|
assert(Tok.is(tok::annot_typename) && "template-id -> type failed");
|
|
TemplateTypeTy = getTypeAnnotation(Tok);
|
|
ConsumeAnnotationToken();
|
|
} else {
|
|
Diag(Tok, diag::err_expected_member_or_base_name);
|
|
return true;
|
|
}
|
|
}
|
|
|
|
// Parse the '('.
|
|
if (getLangOpts().CPlusPlus11 && Tok.is(tok::l_brace)) {
|
|
Diag(Tok, diag::warn_cxx98_compat_generalized_initializer_lists);
|
|
|
|
// FIXME: Add support for signature help inside initializer lists.
|
|
ExprResult InitList = ParseBraceInitializer();
|
|
if (InitList.isInvalid())
|
|
return true;
|
|
|
|
SourceLocation EllipsisLoc;
|
|
TryConsumeToken(tok::ellipsis, EllipsisLoc);
|
|
|
|
if (TemplateTypeTy.isInvalid())
|
|
return true;
|
|
return Actions.ActOnMemInitializer(ConstructorDecl, getCurScope(), SS, II,
|
|
TemplateTypeTy.get(), DS, IdLoc,
|
|
InitList.get(), EllipsisLoc);
|
|
} else if(Tok.is(tok::l_paren)) {
|
|
BalancedDelimiterTracker T(*this, tok::l_paren);
|
|
T.consumeOpen();
|
|
|
|
// Parse the optional expression-list.
|
|
ExprVector ArgExprs;
|
|
CommaLocsTy CommaLocs;
|
|
auto RunSignatureHelp = [&] {
|
|
if (TemplateTypeTy.isInvalid())
|
|
return QualType();
|
|
QualType PreferredType = Actions.ProduceCtorInitMemberSignatureHelp(
|
|
getCurScope(), ConstructorDecl, SS, TemplateTypeTy.get(), ArgExprs, II,
|
|
T.getOpenLocation());
|
|
CalledSignatureHelp = true;
|
|
return PreferredType;
|
|
};
|
|
if (Tok.isNot(tok::r_paren) &&
|
|
ParseExpressionList(ArgExprs, CommaLocs, [&] {
|
|
PreferredType.enterFunctionArgument(Tok.getLocation(),
|
|
RunSignatureHelp);
|
|
})) {
|
|
if (PP.isCodeCompletionReached() && !CalledSignatureHelp)
|
|
RunSignatureHelp();
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
return true;
|
|
}
|
|
|
|
T.consumeClose();
|
|
|
|
SourceLocation EllipsisLoc;
|
|
TryConsumeToken(tok::ellipsis, EllipsisLoc);
|
|
|
|
if (TemplateTypeTy.isInvalid())
|
|
return true;
|
|
return Actions.ActOnMemInitializer(ConstructorDecl, getCurScope(), SS, II,
|
|
TemplateTypeTy.get(), DS, IdLoc,
|
|
T.getOpenLocation(), ArgExprs,
|
|
T.getCloseLocation(), EllipsisLoc);
|
|
}
|
|
|
|
if (TemplateTypeTy.isInvalid())
|
|
return true;
|
|
|
|
if (getLangOpts().CPlusPlus11)
|
|
return Diag(Tok, diag::err_expected_either) << tok::l_paren << tok::l_brace;
|
|
else
|
|
return Diag(Tok, diag::err_expected) << tok::l_paren;
|
|
}
|
|
|
|
/// Parse a C++ exception-specification if present (C++0x [except.spec]).
|
|
///
|
|
/// exception-specification:
|
|
/// dynamic-exception-specification
|
|
/// noexcept-specification
|
|
///
|
|
/// noexcept-specification:
|
|
/// 'noexcept'
|
|
/// 'noexcept' '(' constant-expression ')'
|
|
ExceptionSpecificationType
|
|
Parser::tryParseExceptionSpecification(bool Delayed,
|
|
SourceRange &SpecificationRange,
|
|
SmallVectorImpl<ParsedType> &DynamicExceptions,
|
|
SmallVectorImpl<SourceRange> &DynamicExceptionRanges,
|
|
ExprResult &NoexceptExpr,
|
|
CachedTokens *&ExceptionSpecTokens) {
|
|
ExceptionSpecificationType Result = EST_None;
|
|
ExceptionSpecTokens = nullptr;
|
|
|
|
// Handle delayed parsing of exception-specifications.
|
|
if (Delayed) {
|
|
if (Tok.isNot(tok::kw_throw) && Tok.isNot(tok::kw_noexcept))
|
|
return EST_None;
|
|
|
|
// Consume and cache the starting token.
|
|
bool IsNoexcept = Tok.is(tok::kw_noexcept);
|
|
Token StartTok = Tok;
|
|
SpecificationRange = SourceRange(ConsumeToken());
|
|
|
|
// Check for a '('.
|
|
if (!Tok.is(tok::l_paren)) {
|
|
// If this is a bare 'noexcept', we're done.
|
|
if (IsNoexcept) {
|
|
Diag(Tok, diag::warn_cxx98_compat_noexcept_decl);
|
|
NoexceptExpr = nullptr;
|
|
return EST_BasicNoexcept;
|
|
}
|
|
|
|
Diag(Tok, diag::err_expected_lparen_after) << "throw";
|
|
return EST_DynamicNone;
|
|
}
|
|
|
|
// Cache the tokens for the exception-specification.
|
|
ExceptionSpecTokens = new CachedTokens;
|
|
ExceptionSpecTokens->push_back(StartTok); // 'throw' or 'noexcept'
|
|
ExceptionSpecTokens->push_back(Tok); // '('
|
|
SpecificationRange.setEnd(ConsumeParen()); // '('
|
|
|
|
ConsumeAndStoreUntil(tok::r_paren, *ExceptionSpecTokens,
|
|
/*StopAtSemi=*/true,
|
|
/*ConsumeFinalToken=*/true);
|
|
SpecificationRange.setEnd(ExceptionSpecTokens->back().getLocation());
|
|
|
|
return EST_Unparsed;
|
|
}
|
|
|
|
// See if there's a dynamic specification.
|
|
if (Tok.is(tok::kw_throw)) {
|
|
Result = ParseDynamicExceptionSpecification(SpecificationRange,
|
|
DynamicExceptions,
|
|
DynamicExceptionRanges);
|
|
assert(DynamicExceptions.size() == DynamicExceptionRanges.size() &&
|
|
"Produced different number of exception types and ranges.");
|
|
}
|
|
|
|
// If there's no noexcept specification, we're done.
|
|
if (Tok.isNot(tok::kw_noexcept))
|
|
return Result;
|
|
|
|
Diag(Tok, diag::warn_cxx98_compat_noexcept_decl);
|
|
|
|
// If we already had a dynamic specification, parse the noexcept for,
|
|
// recovery, but emit a diagnostic and don't store the results.
|
|
SourceRange NoexceptRange;
|
|
ExceptionSpecificationType NoexceptType = EST_None;
|
|
|
|
SourceLocation KeywordLoc = ConsumeToken();
|
|
if (Tok.is(tok::l_paren)) {
|
|
// There is an argument.
|
|
BalancedDelimiterTracker T(*this, tok::l_paren);
|
|
T.consumeOpen();
|
|
NoexceptExpr = ParseConstantExpression();
|
|
T.consumeClose();
|
|
if (!NoexceptExpr.isInvalid()) {
|
|
NoexceptExpr = Actions.ActOnNoexceptSpec(KeywordLoc, NoexceptExpr.get(),
|
|
NoexceptType);
|
|
NoexceptRange = SourceRange(KeywordLoc, T.getCloseLocation());
|
|
} else {
|
|
NoexceptType = EST_BasicNoexcept;
|
|
}
|
|
} else {
|
|
// There is no argument.
|
|
NoexceptType = EST_BasicNoexcept;
|
|
NoexceptRange = SourceRange(KeywordLoc, KeywordLoc);
|
|
}
|
|
|
|
if (Result == EST_None) {
|
|
SpecificationRange = NoexceptRange;
|
|
Result = NoexceptType;
|
|
|
|
// If there's a dynamic specification after a noexcept specification,
|
|
// parse that and ignore the results.
|
|
if (Tok.is(tok::kw_throw)) {
|
|
Diag(Tok.getLocation(), diag::err_dynamic_and_noexcept_specification);
|
|
ParseDynamicExceptionSpecification(NoexceptRange, DynamicExceptions,
|
|
DynamicExceptionRanges);
|
|
}
|
|
} else {
|
|
Diag(Tok.getLocation(), diag::err_dynamic_and_noexcept_specification);
|
|
}
|
|
|
|
return Result;
|
|
}
|
|
|
|
static void diagnoseDynamicExceptionSpecification(
|
|
Parser &P, SourceRange Range, bool IsNoexcept) {
|
|
if (P.getLangOpts().CPlusPlus11) {
|
|
const char *Replacement = IsNoexcept ? "noexcept" : "noexcept(false)";
|
|
P.Diag(Range.getBegin(),
|
|
P.getLangOpts().CPlusPlus17 && !IsNoexcept
|
|
? diag::ext_dynamic_exception_spec
|
|
: diag::warn_exception_spec_deprecated)
|
|
<< Range;
|
|
P.Diag(Range.getBegin(), diag::note_exception_spec_deprecated)
|
|
<< Replacement << FixItHint::CreateReplacement(Range, Replacement);
|
|
}
|
|
}
|
|
|
|
/// ParseDynamicExceptionSpecification - Parse a C++
|
|
/// dynamic-exception-specification (C++ [except.spec]).
|
|
///
|
|
/// dynamic-exception-specification:
|
|
/// 'throw' '(' type-id-list [opt] ')'
|
|
/// [MS] 'throw' '(' '...' ')'
|
|
///
|
|
/// type-id-list:
|
|
/// type-id ... [opt]
|
|
/// type-id-list ',' type-id ... [opt]
|
|
///
|
|
ExceptionSpecificationType Parser::ParseDynamicExceptionSpecification(
|
|
SourceRange &SpecificationRange,
|
|
SmallVectorImpl<ParsedType> &Exceptions,
|
|
SmallVectorImpl<SourceRange> &Ranges) {
|
|
assert(Tok.is(tok::kw_throw) && "expected throw");
|
|
|
|
SpecificationRange.setBegin(ConsumeToken());
|
|
BalancedDelimiterTracker T(*this, tok::l_paren);
|
|
if (T.consumeOpen()) {
|
|
Diag(Tok, diag::err_expected_lparen_after) << "throw";
|
|
SpecificationRange.setEnd(SpecificationRange.getBegin());
|
|
return EST_DynamicNone;
|
|
}
|
|
|
|
// Parse throw(...), a Microsoft extension that means "this function
|
|
// can throw anything".
|
|
if (Tok.is(tok::ellipsis)) {
|
|
SourceLocation EllipsisLoc = ConsumeToken();
|
|
if (!getLangOpts().MicrosoftExt)
|
|
Diag(EllipsisLoc, diag::ext_ellipsis_exception_spec);
|
|
T.consumeClose();
|
|
SpecificationRange.setEnd(T.getCloseLocation());
|
|
diagnoseDynamicExceptionSpecification(*this, SpecificationRange, false);
|
|
return EST_MSAny;
|
|
}
|
|
|
|
// Parse the sequence of type-ids.
|
|
SourceRange Range;
|
|
while (Tok.isNot(tok::r_paren)) {
|
|
TypeResult Res(ParseTypeName(&Range));
|
|
|
|
if (Tok.is(tok::ellipsis)) {
|
|
// C++0x [temp.variadic]p5:
|
|
// - In a dynamic-exception-specification (15.4); the pattern is a
|
|
// type-id.
|
|
SourceLocation Ellipsis = ConsumeToken();
|
|
Range.setEnd(Ellipsis);
|
|
if (!Res.isInvalid())
|
|
Res = Actions.ActOnPackExpansion(Res.get(), Ellipsis);
|
|
}
|
|
|
|
if (!Res.isInvalid()) {
|
|
Exceptions.push_back(Res.get());
|
|
Ranges.push_back(Range);
|
|
}
|
|
|
|
if (!TryConsumeToken(tok::comma))
|
|
break;
|
|
}
|
|
|
|
T.consumeClose();
|
|
SpecificationRange.setEnd(T.getCloseLocation());
|
|
diagnoseDynamicExceptionSpecification(*this, SpecificationRange,
|
|
Exceptions.empty());
|
|
return Exceptions.empty() ? EST_DynamicNone : EST_Dynamic;
|
|
}
|
|
|
|
/// ParseTrailingReturnType - Parse a trailing return type on a new-style
|
|
/// function declaration.
|
|
TypeResult Parser::ParseTrailingReturnType(SourceRange &Range,
|
|
bool MayBeFollowedByDirectInit) {
|
|
assert(Tok.is(tok::arrow) && "expected arrow");
|
|
|
|
ConsumeToken();
|
|
|
|
return ParseTypeName(&Range, MayBeFollowedByDirectInit
|
|
? DeclaratorContext::TrailingReturnVar
|
|
: DeclaratorContext::TrailingReturn);
|
|
}
|
|
|
|
/// Parse a requires-clause as part of a function declaration.
|
|
void Parser::ParseTrailingRequiresClause(Declarator &D) {
|
|
assert(Tok.is(tok::kw_requires) && "expected requires");
|
|
|
|
SourceLocation RequiresKWLoc = ConsumeToken();
|
|
|
|
ExprResult TrailingRequiresClause;
|
|
ParseScope ParamScope(this,
|
|
Scope::DeclScope |
|
|
Scope::FunctionDeclarationScope |
|
|
Scope::FunctionPrototypeScope);
|
|
|
|
Actions.ActOnStartTrailingRequiresClause(getCurScope(), D);
|
|
|
|
llvm::Optional<Sema::CXXThisScopeRAII> ThisScope;
|
|
InitCXXThisScopeForDeclaratorIfRelevant(D, D.getDeclSpec(), ThisScope);
|
|
|
|
TrailingRequiresClause =
|
|
ParseConstraintLogicalOrExpression(/*IsTrailingRequiresClause=*/true);
|
|
|
|
TrailingRequiresClause =
|
|
Actions.ActOnFinishTrailingRequiresClause(TrailingRequiresClause);
|
|
|
|
if (!D.isDeclarationOfFunction()) {
|
|
Diag(RequiresKWLoc,
|
|
diag::err_requires_clause_on_declarator_not_declaring_a_function);
|
|
return;
|
|
}
|
|
|
|
if (TrailingRequiresClause.isInvalid())
|
|
SkipUntil({tok::l_brace, tok::arrow, tok::kw_try, tok::comma, tok::colon},
|
|
StopAtSemi | StopBeforeMatch);
|
|
else
|
|
D.setTrailingRequiresClause(TrailingRequiresClause.get());
|
|
|
|
// Did the user swap the trailing return type and requires clause?
|
|
if (D.isFunctionDeclarator() && Tok.is(tok::arrow) &&
|
|
D.getDeclSpec().getTypeSpecType() == TST_auto) {
|
|
SourceLocation ArrowLoc = Tok.getLocation();
|
|
SourceRange Range;
|
|
TypeResult TrailingReturnType =
|
|
ParseTrailingReturnType(Range, /*MayBeFollowedByDirectInit=*/false);
|
|
|
|
if (!TrailingReturnType.isInvalid()) {
|
|
Diag(ArrowLoc,
|
|
diag::err_requires_clause_must_appear_after_trailing_return)
|
|
<< Range;
|
|
auto &FunctionChunk = D.getFunctionTypeInfo();
|
|
FunctionChunk.HasTrailingReturnType = TrailingReturnType.isUsable();
|
|
FunctionChunk.TrailingReturnType = TrailingReturnType.get();
|
|
FunctionChunk.TrailingReturnTypeLoc = Range.getBegin().getRawEncoding();
|
|
} else
|
|
SkipUntil({tok::equal, tok::l_brace, tok::arrow, tok::kw_try, tok::comma},
|
|
StopAtSemi | StopBeforeMatch);
|
|
}
|
|
}
|
|
|
|
/// We have just started parsing the definition of a new class,
|
|
/// so push that class onto our stack of classes that is currently
|
|
/// being parsed.
|
|
Sema::ParsingClassState
|
|
Parser::PushParsingClass(Decl *ClassDecl, bool NonNestedClass,
|
|
bool IsInterface) {
|
|
assert((NonNestedClass || !ClassStack.empty()) &&
|
|
"Nested class without outer class");
|
|
ClassStack.push(new ParsingClass(ClassDecl, NonNestedClass, IsInterface));
|
|
return Actions.PushParsingClass();
|
|
}
|
|
|
|
/// Deallocate the given parsed class and all of its nested
|
|
/// classes.
|
|
void Parser::DeallocateParsedClasses(Parser::ParsingClass *Class) {
|
|
for (unsigned I = 0, N = Class->LateParsedDeclarations.size(); I != N; ++I)
|
|
delete Class->LateParsedDeclarations[I];
|
|
delete Class;
|
|
}
|
|
|
|
/// Pop the top class of the stack of classes that are
|
|
/// currently being parsed.
|
|
///
|
|
/// This routine should be called when we have finished parsing the
|
|
/// definition of a class, but have not yet popped the Scope
|
|
/// associated with the class's definition.
|
|
void Parser::PopParsingClass(Sema::ParsingClassState state) {
|
|
assert(!ClassStack.empty() && "Mismatched push/pop for class parsing");
|
|
|
|
Actions.PopParsingClass(state);
|
|
|
|
ParsingClass *Victim = ClassStack.top();
|
|
ClassStack.pop();
|
|
if (Victim->TopLevelClass) {
|
|
// Deallocate all of the nested classes of this class,
|
|
// recursively: we don't need to keep any of this information.
|
|
DeallocateParsedClasses(Victim);
|
|
return;
|
|
}
|
|
assert(!ClassStack.empty() && "Missing top-level class?");
|
|
|
|
if (Victim->LateParsedDeclarations.empty()) {
|
|
// The victim is a nested class, but we will not need to perform
|
|
// any processing after the definition of this class since it has
|
|
// no members whose handling was delayed. Therefore, we can just
|
|
// remove this nested class.
|
|
DeallocateParsedClasses(Victim);
|
|
return;
|
|
}
|
|
|
|
// This nested class has some members that will need to be processed
|
|
// after the top-level class is completely defined. Therefore, add
|
|
// it to the list of nested classes within its parent.
|
|
assert(getCurScope()->isClassScope() && "Nested class outside of class scope?");
|
|
ClassStack.top()->LateParsedDeclarations.push_back(
|
|
new LateParsedClass(this, Victim));
|
|
}
|
|
|
|
/// Try to parse an 'identifier' which appears within an attribute-token.
|
|
///
|
|
/// \return the parsed identifier on success, and 0 if the next token is not an
|
|
/// attribute-token.
|
|
///
|
|
/// C++11 [dcl.attr.grammar]p3:
|
|
/// If a keyword or an alternative token that satisfies the syntactic
|
|
/// requirements of an identifier is contained in an attribute-token,
|
|
/// it is considered an identifier.
|
|
IdentifierInfo *Parser::TryParseCXX11AttributeIdentifier(SourceLocation &Loc) {
|
|
switch (Tok.getKind()) {
|
|
default:
|
|
// Identifiers and keywords have identifier info attached.
|
|
if (!Tok.isAnnotation()) {
|
|
if (IdentifierInfo *II = Tok.getIdentifierInfo()) {
|
|
Loc = ConsumeToken();
|
|
return II;
|
|
}
|
|
}
|
|
return nullptr;
|
|
|
|
case tok::numeric_constant: {
|
|
// If we got a numeric constant, check to see if it comes from a macro that
|
|
// corresponds to the predefined __clang__ macro. If it does, warn the user
|
|
// and recover by pretending they said _Clang instead.
|
|
if (Tok.getLocation().isMacroID()) {
|
|
SmallString<8> ExpansionBuf;
|
|
SourceLocation ExpansionLoc =
|
|
PP.getSourceManager().getExpansionLoc(Tok.getLocation());
|
|
StringRef Spelling = PP.getSpelling(ExpansionLoc, ExpansionBuf);
|
|
if (Spelling == "__clang__") {
|
|
SourceRange TokRange(
|
|
ExpansionLoc,
|
|
PP.getSourceManager().getExpansionLoc(Tok.getEndLoc()));
|
|
Diag(Tok, diag::warn_wrong_clang_attr_namespace)
|
|
<< FixItHint::CreateReplacement(TokRange, "_Clang");
|
|
Loc = ConsumeToken();
|
|
return &PP.getIdentifierTable().get("_Clang");
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
case tok::ampamp: // 'and'
|
|
case tok::pipe: // 'bitor'
|
|
case tok::pipepipe: // 'or'
|
|
case tok::caret: // 'xor'
|
|
case tok::tilde: // 'compl'
|
|
case tok::amp: // 'bitand'
|
|
case tok::ampequal: // 'and_eq'
|
|
case tok::pipeequal: // 'or_eq'
|
|
case tok::caretequal: // 'xor_eq'
|
|
case tok::exclaim: // 'not'
|
|
case tok::exclaimequal: // 'not_eq'
|
|
// Alternative tokens do not have identifier info, but their spelling
|
|
// starts with an alphabetical character.
|
|
SmallString<8> SpellingBuf;
|
|
SourceLocation SpellingLoc =
|
|
PP.getSourceManager().getSpellingLoc(Tok.getLocation());
|
|
StringRef Spelling = PP.getSpelling(SpellingLoc, SpellingBuf);
|
|
if (isLetter(Spelling[0])) {
|
|
Loc = ConsumeToken();
|
|
return &PP.getIdentifierTable().get(Spelling);
|
|
}
|
|
return nullptr;
|
|
}
|
|
}
|
|
|
|
static bool IsBuiltInOrStandardCXX11Attribute(IdentifierInfo *AttrName,
|
|
IdentifierInfo *ScopeName) {
|
|
switch (
|
|
ParsedAttr::getParsedKind(AttrName, ScopeName, ParsedAttr::AS_CXX11)) {
|
|
case ParsedAttr::AT_CarriesDependency:
|
|
case ParsedAttr::AT_Deprecated:
|
|
case ParsedAttr::AT_FallThrough:
|
|
case ParsedAttr::AT_CXX11NoReturn:
|
|
case ParsedAttr::AT_NoUniqueAddress:
|
|
case ParsedAttr::AT_Likely:
|
|
case ParsedAttr::AT_Unlikely:
|
|
return true;
|
|
case ParsedAttr::AT_WarnUnusedResult:
|
|
return !ScopeName && AttrName->getName().equals("nodiscard");
|
|
case ParsedAttr::AT_Unused:
|
|
return !ScopeName && AttrName->getName().equals("maybe_unused");
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/// ParseCXX11AttributeArgs -- Parse a C++11 attribute-argument-clause.
|
|
///
|
|
/// [C++11] attribute-argument-clause:
|
|
/// '(' balanced-token-seq ')'
|
|
///
|
|
/// [C++11] balanced-token-seq:
|
|
/// balanced-token
|
|
/// balanced-token-seq balanced-token
|
|
///
|
|
/// [C++11] balanced-token:
|
|
/// '(' balanced-token-seq ')'
|
|
/// '[' balanced-token-seq ']'
|
|
/// '{' balanced-token-seq '}'
|
|
/// any token but '(', ')', '[', ']', '{', or '}'
|
|
bool Parser::ParseCXX11AttributeArgs(IdentifierInfo *AttrName,
|
|
SourceLocation AttrNameLoc,
|
|
ParsedAttributes &Attrs,
|
|
SourceLocation *EndLoc,
|
|
IdentifierInfo *ScopeName,
|
|
SourceLocation ScopeLoc) {
|
|
assert(Tok.is(tok::l_paren) && "Not a C++11 attribute argument list");
|
|
SourceLocation LParenLoc = Tok.getLocation();
|
|
const LangOptions &LO = getLangOpts();
|
|
ParsedAttr::Syntax Syntax =
|
|
LO.CPlusPlus ? ParsedAttr::AS_CXX11 : ParsedAttr::AS_C2x;
|
|
|
|
// If the attribute isn't known, we will not attempt to parse any
|
|
// arguments.
|
|
if (!hasAttribute(LO.CPlusPlus ? AttrSyntax::CXX : AttrSyntax::C, ScopeName,
|
|
AttrName, getTargetInfo(), getLangOpts())) {
|
|
// Eat the left paren, then skip to the ending right paren.
|
|
ConsumeParen();
|
|
SkipUntil(tok::r_paren);
|
|
return false;
|
|
}
|
|
|
|
if (ScopeName && (ScopeName->isStr("gnu") || ScopeName->isStr("__gnu__"))) {
|
|
// GNU-scoped attributes have some special cases to handle GNU-specific
|
|
// behaviors.
|
|
ParseGNUAttributeArgs(AttrName, AttrNameLoc, Attrs, EndLoc, ScopeName,
|
|
ScopeLoc, Syntax, nullptr);
|
|
return true;
|
|
}
|
|
|
|
unsigned NumArgs;
|
|
// Some Clang-scoped attributes have some special parsing behavior.
|
|
if (ScopeName && (ScopeName->isStr("clang") || ScopeName->isStr("_Clang")))
|
|
NumArgs = ParseClangAttributeArgs(AttrName, AttrNameLoc, Attrs, EndLoc,
|
|
ScopeName, ScopeLoc, Syntax);
|
|
else
|
|
NumArgs =
|
|
ParseAttributeArgsCommon(AttrName, AttrNameLoc, Attrs, EndLoc,
|
|
ScopeName, ScopeLoc, Syntax);
|
|
|
|
if (!Attrs.empty() &&
|
|
IsBuiltInOrStandardCXX11Attribute(AttrName, ScopeName)) {
|
|
ParsedAttr &Attr = Attrs.back();
|
|
// If the attribute is a standard or built-in attribute and we are
|
|
// parsing an argument list, we need to determine whether this attribute
|
|
// was allowed to have an argument list (such as [[deprecated]]), and how
|
|
// many arguments were parsed (so we can diagnose on [[deprecated()]]).
|
|
if (Attr.getMaxArgs() && !NumArgs) {
|
|
// The attribute was allowed to have arguments, but none were provided
|
|
// even though the attribute parsed successfully. This is an error.
|
|
Diag(LParenLoc, diag::err_attribute_requires_arguments) << AttrName;
|
|
Attr.setInvalid(true);
|
|
} else if (!Attr.getMaxArgs()) {
|
|
// The attribute parsed successfully, but was not allowed to have any
|
|
// arguments. It doesn't matter whether any were provided -- the
|
|
// presence of the argument list (even if empty) is diagnosed.
|
|
Diag(LParenLoc, diag::err_cxx11_attribute_forbids_arguments)
|
|
<< AttrName
|
|
<< FixItHint::CreateRemoval(SourceRange(LParenLoc, *EndLoc));
|
|
Attr.setInvalid(true);
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/// ParseCXX11AttributeSpecifier - Parse a C++11 or C2x attribute-specifier.
|
|
///
|
|
/// [C++11] attribute-specifier:
|
|
/// '[' '[' attribute-list ']' ']'
|
|
/// alignment-specifier
|
|
///
|
|
/// [C++11] attribute-list:
|
|
/// attribute[opt]
|
|
/// attribute-list ',' attribute[opt]
|
|
/// attribute '...'
|
|
/// attribute-list ',' attribute '...'
|
|
///
|
|
/// [C++11] attribute:
|
|
/// attribute-token attribute-argument-clause[opt]
|
|
///
|
|
/// [C++11] attribute-token:
|
|
/// identifier
|
|
/// attribute-scoped-token
|
|
///
|
|
/// [C++11] attribute-scoped-token:
|
|
/// attribute-namespace '::' identifier
|
|
///
|
|
/// [C++11] attribute-namespace:
|
|
/// identifier
|
|
void Parser::ParseCXX11AttributeSpecifier(ParsedAttributes &attrs,
|
|
SourceLocation *endLoc) {
|
|
if (Tok.is(tok::kw_alignas)) {
|
|
Diag(Tok.getLocation(), diag::warn_cxx98_compat_alignas);
|
|
ParseAlignmentSpecifier(attrs, endLoc);
|
|
return;
|
|
}
|
|
|
|
assert(Tok.is(tok::l_square) && NextToken().is(tok::l_square) &&
|
|
"Not a double square bracket attribute list");
|
|
|
|
SourceLocation OpenLoc = Tok.getLocation();
|
|
Diag(OpenLoc, diag::warn_cxx98_compat_attribute);
|
|
|
|
ConsumeBracket();
|
|
checkCompoundToken(OpenLoc, tok::l_square, CompoundToken::AttrBegin);
|
|
ConsumeBracket();
|
|
|
|
SourceLocation CommonScopeLoc;
|
|
IdentifierInfo *CommonScopeName = nullptr;
|
|
if (Tok.is(tok::kw_using)) {
|
|
Diag(Tok.getLocation(), getLangOpts().CPlusPlus17
|
|
? diag::warn_cxx14_compat_using_attribute_ns
|
|
: diag::ext_using_attribute_ns);
|
|
ConsumeToken();
|
|
|
|
CommonScopeName = TryParseCXX11AttributeIdentifier(CommonScopeLoc);
|
|
if (!CommonScopeName) {
|
|
Diag(Tok.getLocation(), diag::err_expected) << tok::identifier;
|
|
SkipUntil(tok::r_square, tok::colon, StopBeforeMatch);
|
|
}
|
|
if (!TryConsumeToken(tok::colon) && CommonScopeName)
|
|
Diag(Tok.getLocation(), diag::err_expected) << tok::colon;
|
|
}
|
|
|
|
llvm::SmallDenseMap<IdentifierInfo*, SourceLocation, 4> SeenAttrs;
|
|
|
|
while (Tok.isNot(tok::r_square)) {
|
|
// attribute not present
|
|
if (TryConsumeToken(tok::comma))
|
|
continue;
|
|
|
|
SourceLocation ScopeLoc, AttrLoc;
|
|
IdentifierInfo *ScopeName = nullptr, *AttrName = nullptr;
|
|
|
|
AttrName = TryParseCXX11AttributeIdentifier(AttrLoc);
|
|
if (!AttrName)
|
|
// Break out to the "expected ']'" diagnostic.
|
|
break;
|
|
|
|
// scoped attribute
|
|
if (TryConsumeToken(tok::coloncolon)) {
|
|
ScopeName = AttrName;
|
|
ScopeLoc = AttrLoc;
|
|
|
|
AttrName = TryParseCXX11AttributeIdentifier(AttrLoc);
|
|
if (!AttrName) {
|
|
Diag(Tok.getLocation(), diag::err_expected) << tok::identifier;
|
|
SkipUntil(tok::r_square, tok::comma, StopAtSemi | StopBeforeMatch);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
if (CommonScopeName) {
|
|
if (ScopeName) {
|
|
Diag(ScopeLoc, diag::err_using_attribute_ns_conflict)
|
|
<< SourceRange(CommonScopeLoc);
|
|
} else {
|
|
ScopeName = CommonScopeName;
|
|
ScopeLoc = CommonScopeLoc;
|
|
}
|
|
}
|
|
|
|
bool StandardAttr = IsBuiltInOrStandardCXX11Attribute(AttrName, ScopeName);
|
|
bool AttrParsed = false;
|
|
|
|
if (StandardAttr &&
|
|
!SeenAttrs.insert(std::make_pair(AttrName, AttrLoc)).second)
|
|
Diag(AttrLoc, diag::err_cxx11_attribute_repeated)
|
|
<< AttrName << SourceRange(SeenAttrs[AttrName]);
|
|
|
|
// Parse attribute arguments
|
|
if (Tok.is(tok::l_paren))
|
|
AttrParsed = ParseCXX11AttributeArgs(AttrName, AttrLoc, attrs, endLoc,
|
|
ScopeName, ScopeLoc);
|
|
|
|
if (!AttrParsed)
|
|
attrs.addNew(
|
|
AttrName,
|
|
SourceRange(ScopeLoc.isValid() ? ScopeLoc : AttrLoc, AttrLoc),
|
|
ScopeName, ScopeLoc, nullptr, 0,
|
|
getLangOpts().CPlusPlus ? ParsedAttr::AS_CXX11 : ParsedAttr::AS_C2x);
|
|
|
|
if (TryConsumeToken(tok::ellipsis))
|
|
Diag(Tok, diag::err_cxx11_attribute_forbids_ellipsis)
|
|
<< AttrName;
|
|
}
|
|
|
|
SourceLocation CloseLoc = Tok.getLocation();
|
|
if (ExpectAndConsume(tok::r_square))
|
|
SkipUntil(tok::r_square);
|
|
else if (Tok.is(tok::r_square))
|
|
checkCompoundToken(CloseLoc, tok::r_square, CompoundToken::AttrEnd);
|
|
if (endLoc)
|
|
*endLoc = Tok.getLocation();
|
|
if (ExpectAndConsume(tok::r_square))
|
|
SkipUntil(tok::r_square);
|
|
}
|
|
|
|
/// ParseCXX11Attributes - Parse a C++11 or C2x attribute-specifier-seq.
|
|
///
|
|
/// attribute-specifier-seq:
|
|
/// attribute-specifier-seq[opt] attribute-specifier
|
|
void Parser::ParseCXX11Attributes(ParsedAttributesWithRange &attrs,
|
|
SourceLocation *endLoc) {
|
|
assert(standardAttributesAllowed());
|
|
|
|
SourceLocation StartLoc = Tok.getLocation(), Loc;
|
|
if (!endLoc)
|
|
endLoc = &Loc;
|
|
|
|
do {
|
|
ParseCXX11AttributeSpecifier(attrs, endLoc);
|
|
} while (isCXX11AttributeSpecifier());
|
|
|
|
attrs.Range = SourceRange(StartLoc, *endLoc);
|
|
}
|
|
|
|
void Parser::DiagnoseAndSkipCXX11Attributes() {
|
|
// Start and end location of an attribute or an attribute list.
|
|
SourceLocation StartLoc = Tok.getLocation();
|
|
SourceLocation EndLoc = SkipCXX11Attributes();
|
|
|
|
if (EndLoc.isValid()) {
|
|
SourceRange Range(StartLoc, EndLoc);
|
|
Diag(StartLoc, diag::err_attributes_not_allowed)
|
|
<< Range;
|
|
}
|
|
}
|
|
|
|
SourceLocation Parser::SkipCXX11Attributes() {
|
|
SourceLocation EndLoc;
|
|
|
|
if (!isCXX11AttributeSpecifier())
|
|
return EndLoc;
|
|
|
|
do {
|
|
if (Tok.is(tok::l_square)) {
|
|
BalancedDelimiterTracker T(*this, tok::l_square);
|
|
T.consumeOpen();
|
|
T.skipToEnd();
|
|
EndLoc = T.getCloseLocation();
|
|
} else {
|
|
assert(Tok.is(tok::kw_alignas) && "not an attribute specifier");
|
|
ConsumeToken();
|
|
BalancedDelimiterTracker T(*this, tok::l_paren);
|
|
if (!T.consumeOpen())
|
|
T.skipToEnd();
|
|
EndLoc = T.getCloseLocation();
|
|
}
|
|
} while (isCXX11AttributeSpecifier());
|
|
|
|
return EndLoc;
|
|
}
|
|
|
|
/// Parse uuid() attribute when it appears in a [] Microsoft attribute.
|
|
void Parser::ParseMicrosoftUuidAttributeArgs(ParsedAttributes &Attrs) {
|
|
assert(Tok.is(tok::identifier) && "Not a Microsoft attribute list");
|
|
IdentifierInfo *UuidIdent = Tok.getIdentifierInfo();
|
|
assert(UuidIdent->getName() == "uuid" && "Not a Microsoft attribute list");
|
|
|
|
SourceLocation UuidLoc = Tok.getLocation();
|
|
ConsumeToken();
|
|
|
|
// Ignore the left paren location for now.
|
|
BalancedDelimiterTracker T(*this, tok::l_paren);
|
|
if (T.consumeOpen()) {
|
|
Diag(Tok, diag::err_expected) << tok::l_paren;
|
|
return;
|
|
}
|
|
|
|
ArgsVector ArgExprs;
|
|
if (Tok.is(tok::string_literal)) {
|
|
// Easy case: uuid("...") -- quoted string.
|
|
ExprResult StringResult = ParseStringLiteralExpression();
|
|
if (StringResult.isInvalid())
|
|
return;
|
|
ArgExprs.push_back(StringResult.get());
|
|
} else {
|
|
// something like uuid({000000A0-0000-0000-C000-000000000049}) -- no
|
|
// quotes in the parens. Just append the spelling of all tokens encountered
|
|
// until the closing paren.
|
|
|
|
SmallString<42> StrBuffer; // 2 "", 36 bytes UUID, 2 optional {}, 1 nul
|
|
StrBuffer += "\"";
|
|
|
|
// Since none of C++'s keywords match [a-f]+, accepting just tok::l_brace,
|
|
// tok::r_brace, tok::minus, tok::identifier (think C000) and
|
|
// tok::numeric_constant (0000) should be enough. But the spelling of the
|
|
// uuid argument is checked later anyways, so there's no harm in accepting
|
|
// almost anything here.
|
|
// cl is very strict about whitespace in this form and errors out if any
|
|
// is present, so check the space flags on the tokens.
|
|
SourceLocation StartLoc = Tok.getLocation();
|
|
while (Tok.isNot(tok::r_paren)) {
|
|
if (Tok.hasLeadingSpace() || Tok.isAtStartOfLine()) {
|
|
Diag(Tok, diag::err_attribute_uuid_malformed_guid);
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
return;
|
|
}
|
|
SmallString<16> SpellingBuffer;
|
|
SpellingBuffer.resize(Tok.getLength() + 1);
|
|
bool Invalid = false;
|
|
StringRef TokSpelling = PP.getSpelling(Tok, SpellingBuffer, &Invalid);
|
|
if (Invalid) {
|
|
SkipUntil(tok::r_paren, StopAtSemi);
|
|
return;
|
|
}
|
|
StrBuffer += TokSpelling;
|
|
ConsumeAnyToken();
|
|
}
|
|
StrBuffer += "\"";
|
|
|
|
if (Tok.hasLeadingSpace() || Tok.isAtStartOfLine()) {
|
|
Diag(Tok, diag::err_attribute_uuid_malformed_guid);
|
|
ConsumeParen();
|
|
return;
|
|
}
|
|
|
|
// Pretend the user wrote the appropriate string literal here.
|
|
// ActOnStringLiteral() copies the string data into the literal, so it's
|
|
// ok that the Token points to StrBuffer.
|
|
Token Toks[1];
|
|
Toks[0].startToken();
|
|
Toks[0].setKind(tok::string_literal);
|
|
Toks[0].setLocation(StartLoc);
|
|
Toks[0].setLiteralData(StrBuffer.data());
|
|
Toks[0].setLength(StrBuffer.size());
|
|
StringLiteral *UuidString =
|
|
cast<StringLiteral>(Actions.ActOnStringLiteral(Toks, nullptr).get());
|
|
ArgExprs.push_back(UuidString);
|
|
}
|
|
|
|
if (!T.consumeClose()) {
|
|
Attrs.addNew(UuidIdent, SourceRange(UuidLoc, T.getCloseLocation()), nullptr,
|
|
SourceLocation(), ArgExprs.data(), ArgExprs.size(),
|
|
ParsedAttr::AS_Microsoft);
|
|
}
|
|
}
|
|
|
|
/// ParseMicrosoftAttributes - Parse Microsoft attributes [Attr]
|
|
///
|
|
/// [MS] ms-attribute:
|
|
/// '[' token-seq ']'
|
|
///
|
|
/// [MS] ms-attribute-seq:
|
|
/// ms-attribute[opt]
|
|
/// ms-attribute ms-attribute-seq
|
|
void Parser::ParseMicrosoftAttributes(ParsedAttributes &attrs,
|
|
SourceLocation *endLoc) {
|
|
assert(Tok.is(tok::l_square) && "Not a Microsoft attribute list");
|
|
|
|
do {
|
|
// FIXME: If this is actually a C++11 attribute, parse it as one.
|
|
BalancedDelimiterTracker T(*this, tok::l_square);
|
|
T.consumeOpen();
|
|
|
|
// Skip most ms attributes except for a specific list.
|
|
while (true) {
|
|
SkipUntil(tok::r_square, tok::identifier, StopAtSemi | StopBeforeMatch);
|
|
if (Tok.isNot(tok::identifier)) // ']', but also eof
|
|
break;
|
|
if (Tok.getIdentifierInfo()->getName() == "uuid")
|
|
ParseMicrosoftUuidAttributeArgs(attrs);
|
|
else
|
|
ConsumeToken();
|
|
}
|
|
|
|
T.consumeClose();
|
|
if (endLoc)
|
|
*endLoc = T.getCloseLocation();
|
|
} while (Tok.is(tok::l_square));
|
|
}
|
|
|
|
void Parser::ParseMicrosoftIfExistsClassDeclaration(
|
|
DeclSpec::TST TagType, ParsedAttributes &AccessAttrs,
|
|
AccessSpecifier &CurAS) {
|
|
IfExistsCondition Result;
|
|
if (ParseMicrosoftIfExistsCondition(Result))
|
|
return;
|
|
|
|
BalancedDelimiterTracker Braces(*this, tok::l_brace);
|
|
if (Braces.consumeOpen()) {
|
|
Diag(Tok, diag::err_expected) << tok::l_brace;
|
|
return;
|
|
}
|
|
|
|
switch (Result.Behavior) {
|
|
case IEB_Parse:
|
|
// Parse the declarations below.
|
|
break;
|
|
|
|
case IEB_Dependent:
|
|
Diag(Result.KeywordLoc, diag::warn_microsoft_dependent_exists)
|
|
<< Result.IsIfExists;
|
|
// Fall through to skip.
|
|
LLVM_FALLTHROUGH;
|
|
|
|
case IEB_Skip:
|
|
Braces.skipToEnd();
|
|
return;
|
|
}
|
|
|
|
while (Tok.isNot(tok::r_brace) && !isEofOrEom()) {
|
|
// __if_exists, __if_not_exists can nest.
|
|
if (Tok.isOneOf(tok::kw___if_exists, tok::kw___if_not_exists)) {
|
|
ParseMicrosoftIfExistsClassDeclaration(TagType,
|
|
AccessAttrs, CurAS);
|
|
continue;
|
|
}
|
|
|
|
// Check for extraneous top-level semicolon.
|
|
if (Tok.is(tok::semi)) {
|
|
ConsumeExtraSemi(InsideStruct, TagType);
|
|
continue;
|
|
}
|
|
|
|
AccessSpecifier AS = getAccessSpecifierIfPresent();
|
|
if (AS != AS_none) {
|
|
// Current token is a C++ access specifier.
|
|
CurAS = AS;
|
|
SourceLocation ASLoc = Tok.getLocation();
|
|
ConsumeToken();
|
|
if (Tok.is(tok::colon))
|
|
Actions.ActOnAccessSpecifier(AS, ASLoc, Tok.getLocation(),
|
|
ParsedAttributesView{});
|
|
else
|
|
Diag(Tok, diag::err_expected) << tok::colon;
|
|
ConsumeToken();
|
|
continue;
|
|
}
|
|
|
|
// Parse all the comma separated declarators.
|
|
ParseCXXClassMemberDeclaration(CurAS, AccessAttrs);
|
|
}
|
|
|
|
Braces.consumeClose();
|
|
}
|