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81 lines
2.7 KiB
81 lines
2.7 KiB
4 months ago
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//===----- CXXABI.h - Interface to C++ ABIs ---------------------*- 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 provides an abstract class for C++ AST support. Concrete
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// subclasses of this implement AST support for specific C++ ABIs.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CLANG_LIB_AST_CXXABI_H
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#define LLVM_CLANG_LIB_AST_CXXABI_H
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#include "clang/AST/Type.h"
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namespace clang {
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class ASTContext;
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class CXXConstructorDecl;
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class DeclaratorDecl;
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class Expr;
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class MemberPointerType;
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class MangleNumberingContext;
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/// Implements C++ ABI-specific semantic analysis functions.
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class CXXABI {
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public:
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virtual ~CXXABI();
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struct MemberPointerInfo {
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uint64_t Width;
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unsigned Align;
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bool HasPadding;
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};
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/// Returns the width and alignment of a member pointer in bits, as well as
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/// whether it has padding.
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virtual MemberPointerInfo
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getMemberPointerInfo(const MemberPointerType *MPT) const = 0;
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/// Returns the default calling convention for C++ methods.
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virtual CallingConv getDefaultMethodCallConv(bool isVariadic) const = 0;
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/// Returns whether the given class is nearly empty, with just virtual
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/// pointers and no data except possibly virtual bases.
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virtual bool isNearlyEmpty(const CXXRecordDecl *RD) const = 0;
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/// Returns a new mangling number context for this C++ ABI.
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virtual std::unique_ptr<MangleNumberingContext>
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createMangleNumberingContext() const = 0;
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/// Adds a mapping from class to copy constructor for this C++ ABI.
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virtual void addCopyConstructorForExceptionObject(CXXRecordDecl *,
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CXXConstructorDecl *) = 0;
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/// Retrieves the mapping from class to copy constructor for this C++ ABI.
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virtual const CXXConstructorDecl *
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getCopyConstructorForExceptionObject(CXXRecordDecl *) = 0;
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virtual void addTypedefNameForUnnamedTagDecl(TagDecl *TD,
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TypedefNameDecl *DD) = 0;
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virtual TypedefNameDecl *
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getTypedefNameForUnnamedTagDecl(const TagDecl *TD) = 0;
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virtual void addDeclaratorForUnnamedTagDecl(TagDecl *TD,
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DeclaratorDecl *DD) = 0;
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virtual DeclaratorDecl *getDeclaratorForUnnamedTagDecl(const TagDecl *TD) = 0;
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};
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/// Creates an instance of a C++ ABI class.
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CXXABI *CreateItaniumCXXABI(ASTContext &Ctx);
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CXXABI *CreateMicrosoftCXXABI(ASTContext &Ctx);
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}
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#endif
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