clang  10.0.0svn
CXXABI.h
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1 //===----- CXXABI.h - Interface to C++ ABIs ---------------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This provides an abstract class for C++ AST support. Concrete
10 // subclasses of this implement AST support for specific C++ ABIs.
11 //
12 //===----------------------------------------------------------------------===//
13 
14 #ifndef LLVM_CLANG_LIB_AST_CXXABI_H
15 #define LLVM_CLANG_LIB_AST_CXXABI_H
16 
17 #include "clang/AST/Type.h"
18 
19 namespace clang {
20 
21 class ASTContext;
22 class CXXConstructorDecl;
23 class DeclaratorDecl;
24 class Expr;
25 class MemberPointerType;
26 class MangleNumberingContext;
27 
28 /// Implements C++ ABI-specific semantic analysis functions.
29 class CXXABI {
30 public:
31  virtual ~CXXABI();
32 
34  uint64_t Width;
35  unsigned Align;
36  bool HasPadding;
37  };
38 
39  /// Returns the width and alignment of a member pointer in bits, as well as
40  /// whether it has padding.
41  virtual MemberPointerInfo
42  getMemberPointerInfo(const MemberPointerType *MPT) const = 0;
43 
44  /// Returns the default calling convention for C++ methods.
45  virtual CallingConv getDefaultMethodCallConv(bool isVariadic) const = 0;
46 
47  /// Returns whether the given class is nearly empty, with just virtual
48  /// pointers and no data except possibly virtual bases.
49  virtual bool isNearlyEmpty(const CXXRecordDecl *RD) const = 0;
50 
51  /// Returns a new mangling number context for this C++ ABI.
52  virtual std::unique_ptr<MangleNumberingContext>
53  createMangleNumberingContext() const = 0;
54 
55  /// Adds a mapping from class to copy constructor for this C++ ABI.
57  CXXConstructorDecl *) = 0;
58 
59  /// Retrieves the mapping from class to copy constructor for this C++ ABI.
60  virtual const CXXConstructorDecl *
62 
64  TypedefNameDecl *DD) = 0;
65 
66  virtual TypedefNameDecl *
68 
69  virtual void addDeclaratorForUnnamedTagDecl(TagDecl *TD,
70  DeclaratorDecl *DD) = 0;
71 
73 };
74 
75 /// Creates an instance of a C++ ABI class.
78 }
79 
80 #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:2365
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:160
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:696
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:29
CallingConv
CallingConv - Specifies the calling convention that a function uses.
Definition: Specifiers.h:265
virtual std::unique_ptr< MangleNumberingContext > createMangleNumberingContext() const =0
Returns a new mangling number context for this C++ ABI.
Represents the declaration of a struct/union/class/enum.
Definition: Decl.h:3133
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:2985
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:2804
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:255