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//===----- 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.
#include "clang/AST/Type.h"
namespace clang {
class ASTContext;
class MemberPointerType;
class MangleNumberingContext;
/// Implements C++ ABI-specific semantic analysis functions.
class CXXABI {
virtual ~CXXABI();
/// Returns the width and alignment of a member pointer in bits.
virtual std::pair<uint64_t, unsigned>
getMemberPointerWidthAndAlign(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 MangleNumberingContext *createMangleNumberingContext() const = 0;
/// Creates an instance of a C++ ABI class.
CXXABI *CreateItaniumCXXABI(ASTContext &Ctx);
CXXABI *CreateMicrosoftCXXABI(ASTContext &Ctx);