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