clang  6.0.0svn
CXXABI.h
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1 //===----- CXXABI.h - Interface to C++ ABIs ---------------------*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This provides an abstract class for C++ AST support. Concrete
11 // subclasses of this implement AST support for specific C++ ABIs.
12 //
13 //===----------------------------------------------------------------------===//
14 
15 #ifndef LLVM_CLANG_LIB_AST_CXXABI_H
16 #define LLVM_CLANG_LIB_AST_CXXABI_H
17 
18 #include "clang/AST/Type.h"
19 
20 namespace clang {
21 
22 class ASTContext;
23 class CXXConstructorDecl;
24 class DeclaratorDecl;
25 class Expr;
26 class MemberPointerType;
27 class MangleNumberingContext;
28 
29 /// Implements C++ ABI-specific semantic analysis functions.
30 class CXXABI {
31 public:
32  virtual ~CXXABI();
33 
35  uint64_t Width;
36  unsigned Align;
37  bool HasPadding;
38  };
39 
40  /// Returns the width and alignment of a member pointer in bits, as well as
41  /// whether it has padding.
42  virtual MemberPointerInfo
43  getMemberPointerInfo(const MemberPointerType *MPT) const = 0;
44 
45  /// Returns the default calling convention for C++ methods.
46  virtual CallingConv getDefaultMethodCallConv(bool isVariadic) const = 0;
47 
48  /// Returns whether the given class is nearly empty, with just virtual
49  /// pointers and no data except possibly virtual bases.
50  virtual bool isNearlyEmpty(const CXXRecordDecl *RD) const = 0;
51 
52  /// Returns a new mangling number context for this C++ ABI.
53  virtual std::unique_ptr<MangleNumberingContext>
54  createMangleNumberingContext() const = 0;
55 
56  /// Adds a mapping from class to copy constructor for this C++ ABI.
58  CXXConstructorDecl *) = 0;
59 
60  /// Retrieves the mapping from class to copy constructor for this C++ ABI.
61  virtual const CXXConstructorDecl *
63 
65  TypedefNameDecl *DD) = 0;
66 
67  virtual TypedefNameDecl *
69 
70  virtual void addDeclaratorForUnnamedTagDecl(TagDecl *TD,
71  DeclaratorDecl *DD) = 0;
72 
74 };
75 
76 /// Creates an instance of a C++ ABI class.
79 }
80 
81 #endif
CXXABI * CreateMicrosoftCXXABI(ASTContext &Ctx)
C Language Family Type Representation.
virtual void addTypedefNameForUnnamedTagDecl(TagDecl *TD, TypedefNameDecl *DD)=0
Represents a C++ constructor within a class.
Definition: DeclCXX.h:2397
virtual const CXXConstructorDecl * getCopyConstructorForExceptionObject(CXXRecordDecl *)=0
Retrieves the mapping from class to copy constructor for this C++ ABI.
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:149
virtual CallingConv getDefaultMethodCallConv(bool isVariadic) const =0
Returns the default calling convention for C++ methods.
CXXABI * CreateItaniumCXXABI(ASTContext &Ctx)
Creates an instance of a C++ ABI class.
virtual DeclaratorDecl * getDeclaratorForUnnamedTagDecl(const TagDecl *TD)=0
Represents a ValueDecl that came out of a declarator.
Definition: Decl.h:681
virtual MemberPointerInfo getMemberPointerInfo(const MemberPointerType *MPT) const =0
Returns the width and alignment of a member pointer in bits, as well as whether it has padding...
Implements C++ ABI-specific semantic analysis functions.
Definition: CXXABI.h:30
CallingConv
CallingConv - Specifies the calling convention that a function uses.
Definition: Specifiers.h:233
virtual std::unique_ptr< MangleNumberingContext > createMangleNumberingContext() const =0
Returns a new mangling number context for this C++ ABI.
TagDecl - Represents the declaration of a struct/union/class/enum.
Definition: Decl.h:2938
virtual bool isNearlyEmpty(const CXXRecordDecl *RD) const =0
Returns whether the given class is nearly empty, with just virtual pointers and no data except possib...
Base class for declarations which introduce a typedef-name.
Definition: Decl.h:2796
Dataflow Directional Tag Classes.
virtual TypedefNameDecl * getTypedefNameForUnnamedTagDecl(const TagDecl *TD)=0
A pointer to member type per C++ 8.3.3 - Pointers to members.
Definition: Type.h:2504
virtual ~CXXABI()
virtual void addDeclaratorForUnnamedTagDecl(TagDecl *TD, DeclaratorDecl *DD)=0
virtual void addCopyConstructorForExceptionObject(CXXRecordDecl *, CXXConstructorDecl *)=0
Adds a mapping from class to copy constructor for this C++ ABI.
Represents a C++ struct/union/class.
Definition: DeclCXX.h:299