You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
407 lines
16 KiB
407 lines
16 KiB
//===--- HeaderIncludes.cpp - Insert/Delete #includes --*- C++ -*----------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "clang/Tooling/Inclusions/HeaderIncludes.h"
|
|
#include "clang/Basic/FileManager.h"
|
|
#include "clang/Basic/SourceManager.h"
|
|
#include "clang/Lex/Lexer.h"
|
|
#include "llvm/ADT/Optional.h"
|
|
#include "llvm/Support/FormatVariadic.h"
|
|
#include "llvm/Support/Path.h"
|
|
|
|
namespace clang {
|
|
namespace tooling {
|
|
namespace {
|
|
|
|
LangOptions createLangOpts() {
|
|
LangOptions LangOpts;
|
|
LangOpts.CPlusPlus = 1;
|
|
LangOpts.CPlusPlus11 = 1;
|
|
LangOpts.CPlusPlus14 = 1;
|
|
LangOpts.LineComment = 1;
|
|
LangOpts.CXXOperatorNames = 1;
|
|
LangOpts.Bool = 1;
|
|
LangOpts.ObjC = 1;
|
|
LangOpts.MicrosoftExt = 1; // To get kw___try, kw___finally.
|
|
LangOpts.DeclSpecKeyword = 1; // To get __declspec.
|
|
LangOpts.WChar = 1; // To get wchar_t
|
|
return LangOpts;
|
|
}
|
|
|
|
// Returns the offset after skipping a sequence of tokens, matched by \p
|
|
// GetOffsetAfterSequence, from the start of the code.
|
|
// \p GetOffsetAfterSequence should be a function that matches a sequence of
|
|
// tokens and returns an offset after the sequence.
|
|
unsigned getOffsetAfterTokenSequence(
|
|
StringRef FileName, StringRef Code, const IncludeStyle &Style,
|
|
llvm::function_ref<unsigned(const SourceManager &, Lexer &, Token &)>
|
|
GetOffsetAfterSequence) {
|
|
SourceManagerForFile VirtualSM(FileName, Code);
|
|
SourceManager &SM = VirtualSM.get();
|
|
Lexer Lex(SM.getMainFileID(), SM.getBufferOrFake(SM.getMainFileID()), SM,
|
|
createLangOpts());
|
|
Token Tok;
|
|
// Get the first token.
|
|
Lex.LexFromRawLexer(Tok);
|
|
return GetOffsetAfterSequence(SM, Lex, Tok);
|
|
}
|
|
|
|
// Check if a sequence of tokens is like "#<Name> <raw_identifier>". If it is,
|
|
// \p Tok will be the token after this directive; otherwise, it can be any token
|
|
// after the given \p Tok (including \p Tok). If \p RawIDName is provided, the
|
|
// (second) raw_identifier name is checked.
|
|
bool checkAndConsumeDirectiveWithName(
|
|
Lexer &Lex, StringRef Name, Token &Tok,
|
|
llvm::Optional<StringRef> RawIDName = llvm::None) {
|
|
bool Matched = Tok.is(tok::hash) && !Lex.LexFromRawLexer(Tok) &&
|
|
Tok.is(tok::raw_identifier) &&
|
|
Tok.getRawIdentifier() == Name && !Lex.LexFromRawLexer(Tok) &&
|
|
Tok.is(tok::raw_identifier) &&
|
|
(!RawIDName || Tok.getRawIdentifier() == *RawIDName);
|
|
if (Matched)
|
|
Lex.LexFromRawLexer(Tok);
|
|
return Matched;
|
|
}
|
|
|
|
void skipComments(Lexer &Lex, Token &Tok) {
|
|
while (Tok.is(tok::comment))
|
|
if (Lex.LexFromRawLexer(Tok))
|
|
return;
|
|
}
|
|
|
|
// Returns the offset after header guard directives and any comments
|
|
// before/after header guards (e.g. #ifndef/#define pair, #pragma once). If no
|
|
// header guard is present in the code, this will return the offset after
|
|
// skipping all comments from the start of the code.
|
|
unsigned getOffsetAfterHeaderGuardsAndComments(StringRef FileName,
|
|
StringRef Code,
|
|
const IncludeStyle &Style) {
|
|
// \p Consume returns location after header guard or 0 if no header guard is
|
|
// found.
|
|
auto ConsumeHeaderGuardAndComment =
|
|
[&](std::function<unsigned(const SourceManager &SM, Lexer &Lex,
|
|
Token Tok)>
|
|
Consume) {
|
|
return getOffsetAfterTokenSequence(
|
|
FileName, Code, Style,
|
|
[&Consume](const SourceManager &SM, Lexer &Lex, Token Tok) {
|
|
skipComments(Lex, Tok);
|
|
unsigned InitialOffset = SM.getFileOffset(Tok.getLocation());
|
|
return std::max(InitialOffset, Consume(SM, Lex, Tok));
|
|
});
|
|
};
|
|
return std::max(
|
|
// #ifndef/#define
|
|
ConsumeHeaderGuardAndComment(
|
|
[](const SourceManager &SM, Lexer &Lex, Token Tok) -> unsigned {
|
|
if (checkAndConsumeDirectiveWithName(Lex, "ifndef", Tok)) {
|
|
skipComments(Lex, Tok);
|
|
if (checkAndConsumeDirectiveWithName(Lex, "define", Tok) &&
|
|
Tok.isAtStartOfLine())
|
|
return SM.getFileOffset(Tok.getLocation());
|
|
}
|
|
return 0;
|
|
}),
|
|
// #pragma once
|
|
ConsumeHeaderGuardAndComment(
|
|
[](const SourceManager &SM, Lexer &Lex, Token Tok) -> unsigned {
|
|
if (checkAndConsumeDirectiveWithName(Lex, "pragma", Tok,
|
|
StringRef("once")))
|
|
return SM.getFileOffset(Tok.getLocation());
|
|
return 0;
|
|
}));
|
|
}
|
|
|
|
// Check if a sequence of tokens is like
|
|
// "#include ("header.h" | <header.h>)".
|
|
// If it is, \p Tok will be the token after this directive; otherwise, it can be
|
|
// any token after the given \p Tok (including \p Tok).
|
|
bool checkAndConsumeInclusiveDirective(Lexer &Lex, Token &Tok) {
|
|
auto Matched = [&]() {
|
|
Lex.LexFromRawLexer(Tok);
|
|
return true;
|
|
};
|
|
if (Tok.is(tok::hash) && !Lex.LexFromRawLexer(Tok) &&
|
|
Tok.is(tok::raw_identifier) && Tok.getRawIdentifier() == "include") {
|
|
if (Lex.LexFromRawLexer(Tok))
|
|
return false;
|
|
if (Tok.is(tok::string_literal))
|
|
return Matched();
|
|
if (Tok.is(tok::less)) {
|
|
while (!Lex.LexFromRawLexer(Tok) && Tok.isNot(tok::greater)) {
|
|
}
|
|
if (Tok.is(tok::greater))
|
|
return Matched();
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// Returns the offset of the last #include directive after which a new
|
|
// #include can be inserted. This ignores #include's after the #include block(s)
|
|
// in the beginning of a file to avoid inserting headers into code sections
|
|
// where new #include's should not be added by default.
|
|
// These code sections include:
|
|
// - raw string literals (containing #include).
|
|
// - #if blocks.
|
|
// - Special #include's among declarations (e.g. functions).
|
|
//
|
|
// If no #include after which a new #include can be inserted, this returns the
|
|
// offset after skipping all comments from the start of the code.
|
|
// Inserting after an #include is not allowed if it comes after code that is not
|
|
// #include (e.g. pre-processing directive that is not #include, declarations).
|
|
unsigned getMaxHeaderInsertionOffset(StringRef FileName, StringRef Code,
|
|
const IncludeStyle &Style) {
|
|
return getOffsetAfterTokenSequence(
|
|
FileName, Code, Style,
|
|
[](const SourceManager &SM, Lexer &Lex, Token Tok) {
|
|
skipComments(Lex, Tok);
|
|
unsigned MaxOffset = SM.getFileOffset(Tok.getLocation());
|
|
while (checkAndConsumeInclusiveDirective(Lex, Tok))
|
|
MaxOffset = SM.getFileOffset(Tok.getLocation());
|
|
return MaxOffset;
|
|
});
|
|
}
|
|
|
|
inline StringRef trimInclude(StringRef IncludeName) {
|
|
return IncludeName.trim("\"<>");
|
|
}
|
|
|
|
const char IncludeRegexPattern[] =
|
|
R"(^[\t\ ]*#[\t\ ]*(import|include)[^"<]*(["<][^">]*[">]))";
|
|
|
|
// The filename of Path excluding extension.
|
|
// Used to match implementation with headers, this differs from sys::path::stem:
|
|
// - in names with multiple dots (foo.cu.cc) it terminates at the *first*
|
|
// - an empty stem is never returned: /foo/.bar.x => .bar
|
|
// - we don't bother to handle . and .. specially
|
|
StringRef matchingStem(llvm::StringRef Path) {
|
|
StringRef Name = llvm::sys::path::filename(Path);
|
|
return Name.substr(0, Name.find('.', 1));
|
|
}
|
|
|
|
} // anonymous namespace
|
|
|
|
IncludeCategoryManager::IncludeCategoryManager(const IncludeStyle &Style,
|
|
StringRef FileName)
|
|
: Style(Style), FileName(FileName) {
|
|
for (const auto &Category : Style.IncludeCategories) {
|
|
CategoryRegexs.emplace_back(Category.Regex, Category.RegexIsCaseSensitive
|
|
? llvm::Regex::NoFlags
|
|
: llvm::Regex::IgnoreCase);
|
|
}
|
|
IsMainFile = FileName.endswith(".c") || FileName.endswith(".cc") ||
|
|
FileName.endswith(".cpp") || FileName.endswith(".c++") ||
|
|
FileName.endswith(".cxx") || FileName.endswith(".m") ||
|
|
FileName.endswith(".mm");
|
|
if (!Style.IncludeIsMainSourceRegex.empty()) {
|
|
llvm::Regex MainFileRegex(Style.IncludeIsMainSourceRegex);
|
|
IsMainFile |= MainFileRegex.match(FileName);
|
|
}
|
|
}
|
|
|
|
int IncludeCategoryManager::getIncludePriority(StringRef IncludeName,
|
|
bool CheckMainHeader) const {
|
|
int Ret = INT_MAX;
|
|
for (unsigned i = 0, e = CategoryRegexs.size(); i != e; ++i)
|
|
if (CategoryRegexs[i].match(IncludeName)) {
|
|
Ret = Style.IncludeCategories[i].Priority;
|
|
break;
|
|
}
|
|
if (CheckMainHeader && IsMainFile && Ret > 0 && isMainHeader(IncludeName))
|
|
Ret = 0;
|
|
return Ret;
|
|
}
|
|
|
|
int IncludeCategoryManager::getSortIncludePriority(StringRef IncludeName,
|
|
bool CheckMainHeader) const {
|
|
int Ret = INT_MAX;
|
|
for (unsigned i = 0, e = CategoryRegexs.size(); i != e; ++i)
|
|
if (CategoryRegexs[i].match(IncludeName)) {
|
|
Ret = Style.IncludeCategories[i].SortPriority;
|
|
if (Ret == 0)
|
|
Ret = Style.IncludeCategories[i].Priority;
|
|
break;
|
|
}
|
|
if (CheckMainHeader && IsMainFile && Ret > 0 && isMainHeader(IncludeName))
|
|
Ret = 0;
|
|
return Ret;
|
|
}
|
|
bool IncludeCategoryManager::isMainHeader(StringRef IncludeName) const {
|
|
if (!IncludeName.startswith("\""))
|
|
return false;
|
|
|
|
IncludeName =
|
|
IncludeName.drop_front(1).drop_back(1); // remove the surrounding "" or <>
|
|
// Not matchingStem: implementation files may have compound extensions but
|
|
// headers may not.
|
|
StringRef HeaderStem = llvm::sys::path::stem(IncludeName);
|
|
StringRef FileStem = llvm::sys::path::stem(FileName); // foo.cu for foo.cu.cc
|
|
StringRef MatchingFileStem = matchingStem(FileName); // foo for foo.cu.cc
|
|
// main-header examples:
|
|
// 1) foo.h => foo.cc
|
|
// 2) foo.h => foo.cu.cc
|
|
// 3) foo.proto.h => foo.proto.cc
|
|
//
|
|
// non-main-header examples:
|
|
// 1) foo.h => bar.cc
|
|
// 2) foo.proto.h => foo.cc
|
|
StringRef Matching;
|
|
if (MatchingFileStem.startswith_lower(HeaderStem))
|
|
Matching = MatchingFileStem; // example 1), 2)
|
|
else if (FileStem.equals_lower(HeaderStem))
|
|
Matching = FileStem; // example 3)
|
|
if (!Matching.empty()) {
|
|
llvm::Regex MainIncludeRegex(HeaderStem.str() + Style.IncludeIsMainRegex,
|
|
llvm::Regex::IgnoreCase);
|
|
if (MainIncludeRegex.match(Matching))
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
HeaderIncludes::HeaderIncludes(StringRef FileName, StringRef Code,
|
|
const IncludeStyle &Style)
|
|
: FileName(FileName), Code(Code), FirstIncludeOffset(-1),
|
|
MinInsertOffset(
|
|
getOffsetAfterHeaderGuardsAndComments(FileName, Code, Style)),
|
|
MaxInsertOffset(MinInsertOffset +
|
|
getMaxHeaderInsertionOffset(
|
|
FileName, Code.drop_front(MinInsertOffset), Style)),
|
|
Categories(Style, FileName),
|
|
IncludeRegex(llvm::Regex(IncludeRegexPattern)) {
|
|
// Add 0 for main header and INT_MAX for headers that are not in any
|
|
// category.
|
|
Priorities = {0, INT_MAX};
|
|
for (const auto &Category : Style.IncludeCategories)
|
|
Priorities.insert(Category.Priority);
|
|
SmallVector<StringRef, 32> Lines;
|
|
Code.drop_front(MinInsertOffset).split(Lines, "\n");
|
|
|
|
unsigned Offset = MinInsertOffset;
|
|
unsigned NextLineOffset;
|
|
SmallVector<StringRef, 4> Matches;
|
|
for (auto Line : Lines) {
|
|
NextLineOffset = std::min(Code.size(), Offset + Line.size() + 1);
|
|
if (IncludeRegex.match(Line, &Matches)) {
|
|
// If this is the last line without trailing newline, we need to make
|
|
// sure we don't delete across the file boundary.
|
|
addExistingInclude(
|
|
Include(Matches[2],
|
|
tooling::Range(
|
|
Offset, std::min(Line.size() + 1, Code.size() - Offset))),
|
|
NextLineOffset);
|
|
}
|
|
Offset = NextLineOffset;
|
|
}
|
|
|
|
// Populate CategoryEndOfssets:
|
|
// - Ensure that CategoryEndOffset[Highest] is always populated.
|
|
// - If CategoryEndOffset[Priority] isn't set, use the next higher value
|
|
// that is set, up to CategoryEndOffset[Highest].
|
|
auto Highest = Priorities.begin();
|
|
if (CategoryEndOffsets.find(*Highest) == CategoryEndOffsets.end()) {
|
|
if (FirstIncludeOffset >= 0)
|
|
CategoryEndOffsets[*Highest] = FirstIncludeOffset;
|
|
else
|
|
CategoryEndOffsets[*Highest] = MinInsertOffset;
|
|
}
|
|
// By this point, CategoryEndOffset[Highest] is always set appropriately:
|
|
// - to an appropriate location before/after existing #includes, or
|
|
// - to right after the header guard, or
|
|
// - to the beginning of the file.
|
|
for (auto I = ++Priorities.begin(), E = Priorities.end(); I != E; ++I)
|
|
if (CategoryEndOffsets.find(*I) == CategoryEndOffsets.end())
|
|
CategoryEndOffsets[*I] = CategoryEndOffsets[*std::prev(I)];
|
|
}
|
|
|
|
// \p Offset: the start of the line following this include directive.
|
|
void HeaderIncludes::addExistingInclude(Include IncludeToAdd,
|
|
unsigned NextLineOffset) {
|
|
auto Iter =
|
|
ExistingIncludes.try_emplace(trimInclude(IncludeToAdd.Name)).first;
|
|
Iter->second.push_back(std::move(IncludeToAdd));
|
|
auto &CurInclude = Iter->second.back();
|
|
// The header name with quotes or angle brackets.
|
|
// Only record the offset of current #include if we can insert after it.
|
|
if (CurInclude.R.getOffset() <= MaxInsertOffset) {
|
|
int Priority = Categories.getIncludePriority(
|
|
CurInclude.Name, /*CheckMainHeader=*/FirstIncludeOffset < 0);
|
|
CategoryEndOffsets[Priority] = NextLineOffset;
|
|
IncludesByPriority[Priority].push_back(&CurInclude);
|
|
if (FirstIncludeOffset < 0)
|
|
FirstIncludeOffset = CurInclude.R.getOffset();
|
|
}
|
|
}
|
|
|
|
llvm::Optional<tooling::Replacement>
|
|
HeaderIncludes::insert(llvm::StringRef IncludeName, bool IsAngled) const {
|
|
assert(IncludeName == trimInclude(IncludeName));
|
|
// If a <header> ("header") already exists in code, "header" (<header>) with
|
|
// different quotation will still be inserted.
|
|
// FIXME: figure out if this is the best behavior.
|
|
auto It = ExistingIncludes.find(IncludeName);
|
|
if (It != ExistingIncludes.end())
|
|
for (const auto &Inc : It->second)
|
|
if ((IsAngled && StringRef(Inc.Name).startswith("<")) ||
|
|
(!IsAngled && StringRef(Inc.Name).startswith("\"")))
|
|
return llvm::None;
|
|
std::string Quoted =
|
|
std::string(llvm::formatv(IsAngled ? "<{0}>" : "\"{0}\"", IncludeName));
|
|
StringRef QuotedName = Quoted;
|
|
int Priority = Categories.getIncludePriority(
|
|
QuotedName, /*CheckMainHeader=*/FirstIncludeOffset < 0);
|
|
auto CatOffset = CategoryEndOffsets.find(Priority);
|
|
assert(CatOffset != CategoryEndOffsets.end());
|
|
unsigned InsertOffset = CatOffset->second; // Fall back offset
|
|
auto Iter = IncludesByPriority.find(Priority);
|
|
if (Iter != IncludesByPriority.end()) {
|
|
for (const auto *Inc : Iter->second) {
|
|
if (QuotedName < Inc->Name) {
|
|
InsertOffset = Inc->R.getOffset();
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
assert(InsertOffset <= Code.size());
|
|
std::string NewInclude =
|
|
std::string(llvm::formatv("#include {0}\n", QuotedName));
|
|
// When inserting headers at end of the code, also append '\n' to the code
|
|
// if it does not end with '\n'.
|
|
// FIXME: when inserting multiple #includes at the end of code, only one
|
|
// newline should be added.
|
|
if (InsertOffset == Code.size() && (!Code.empty() && Code.back() != '\n'))
|
|
NewInclude = "\n" + NewInclude;
|
|
return tooling::Replacement(FileName, InsertOffset, 0, NewInclude);
|
|
}
|
|
|
|
tooling::Replacements HeaderIncludes::remove(llvm::StringRef IncludeName,
|
|
bool IsAngled) const {
|
|
assert(IncludeName == trimInclude(IncludeName));
|
|
tooling::Replacements Result;
|
|
auto Iter = ExistingIncludes.find(IncludeName);
|
|
if (Iter == ExistingIncludes.end())
|
|
return Result;
|
|
for (const auto &Inc : Iter->second) {
|
|
if ((IsAngled && StringRef(Inc.Name).startswith("\"")) ||
|
|
(!IsAngled && StringRef(Inc.Name).startswith("<")))
|
|
continue;
|
|
llvm::Error Err = Result.add(tooling::Replacement(
|
|
FileName, Inc.R.getOffset(), Inc.R.getLength(), ""));
|
|
if (Err) {
|
|
auto ErrMsg = "Unexpected conflicts in #include deletions: " +
|
|
llvm::toString(std::move(Err));
|
|
llvm_unreachable(ErrMsg.c_str());
|
|
}
|
|
}
|
|
return Result;
|
|
}
|
|
|
|
} // namespace tooling
|
|
} // namespace clang
|