clang API Documentation
00001 //===----- CXXABI.h - Interface to C++ ABIs ---------------------*- C++ -*-===// 00002 // 00003 // The LLVM Compiler Infrastructure 00004 // 00005 // This file is distributed under the University of Illinois Open Source 00006 // License. See LICENSE.TXT for details. 00007 // 00008 //===----------------------------------------------------------------------===// 00009 // 00010 // This provides an abstract class for C++ AST support. Concrete 00011 // subclasses of this implement AST support for specific C++ ABIs. 00012 // 00013 //===----------------------------------------------------------------------===// 00014 00015 #ifndef LLVM_CLANG_LIB_AST_CXXABI_H 00016 #define LLVM_CLANG_LIB_AST_CXXABI_H 00017 00018 #include "clang/AST/Type.h" 00019 00020 namespace clang { 00021 00022 class ASTContext; 00023 class MemberPointerType; 00024 class MangleNumberingContext; 00025 00026 /// Implements C++ ABI-specific semantic analysis functions. 00027 class CXXABI { 00028 public: 00029 virtual ~CXXABI(); 00030 00031 /// Returns the width and alignment of a member pointer in bits. 00032 virtual std::pair<uint64_t, unsigned> 00033 getMemberPointerWidthAndAlign(const MemberPointerType *MPT) const = 0; 00034 00035 /// Returns the default calling convention for C++ methods. 00036 virtual CallingConv getDefaultMethodCallConv(bool isVariadic) const = 0; 00037 00038 /// Returns whether the given class is nearly empty, with just virtual 00039 /// pointers and no data except possibly virtual bases. 00040 virtual bool isNearlyEmpty(const CXXRecordDecl *RD) const = 0; 00041 00042 /// Returns a new mangling number context for this C++ ABI. 00043 virtual MangleNumberingContext *createMangleNumberingContext() const = 0; 00044 }; 00045 00046 /// Creates an instance of a C++ ABI class. 00047 CXXABI *CreateItaniumCXXABI(ASTContext &Ctx); 00048 CXXABI *CreateMicrosoftCXXABI(ASTContext &Ctx); 00049 } 00050 00051 #endif