path: root/include/clang/AST/DeclCXX.h

//===-- DeclCXX.h - Classes for representing C++ declarations -*- C++ -*-=====//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//  This file defines the C++ Decl subclasses.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_AST_DECLCXX_H
#define LLVM_CLANG_AST_DECLCXX_H

#include "clang/AST/Decl.h"
#include "llvm/ADT/SmallVector.h"

namespace clang {

class ClassTemplateDecl;
class CXXRecordDecl;
class CXXConstructorDecl;
class CXXDestructorDecl;
class CXXConversionDecl;
class CXXMethodDecl;
class ClassTemplateSpecializationDecl;

/// \brief Represents any kind of function declaration, whether it is a 
/// concrete function or a function template.
class AnyFunctionDecl {
  NamedDecl *Function;
  
  AnyFunctionDecl(NamedDecl *ND) : Function(ND) { }
  
public:
  AnyFunctionDecl(FunctionDecl *FD) : Function(FD) { }
  AnyFunctionDecl(FunctionTemplateDecl *FTD);
  
  /// \brief Implicily converts any function or function template into a 
  /// named declaration.
  operator NamedDecl *() const { return Function; }
  
  /// \brief Retrieve the underlying function or function template.
  NamedDecl *get() const { return Function; }
  
  static AnyFunctionDecl getFromNamedDecl(NamedDecl *ND) { 
    return AnyFunctionDecl(ND);
  }
};
  
} // end namespace clang

namespace llvm {
  /// Implement simplify_type for AnyFunctionDecl, so that we can dyn_cast from 
  /// AnyFunctionDecl to any function or function template declaration.
  template<> struct simplify_type<const ::clang::AnyFunctionDecl> {
    typedef ::clang::NamedDecl* SimpleType;
    static SimpleType getSimplifiedValue(const ::clang::AnyFunctionDecl &Val) {
      return Val;
    }
  };
  template<> struct simplify_type< ::clang::AnyFunctionDecl>
  : public simplify_type<const ::clang::AnyFunctionDecl> {};
  
  // Provide PointerLikeTypeTraits for non-cvr pointers.
  template<>
  class PointerLikeTypeTraits< ::clang::AnyFunctionDecl> {
  public:
    static inline void *getAsVoidPointer(::clang::AnyFunctionDecl F) {
      return F.get(); 
    }
    static inline ::clang::AnyFunctionDecl getFromVoidPointer(void *P) {
      return ::clang::AnyFunctionDecl::getFromNamedDecl(
                                      static_cast< ::clang::NamedDecl*>(P));
    }
    
    enum { NumLowBitsAvailable = 2 };
  };
  
} // end namespace llvm

namespace clang {
  
/// OverloadedFunctionDecl - An instance of this class represents a
/// set of overloaded functions. All of the functions have the same
/// name and occur within the same scope.
///
/// An OverloadedFunctionDecl has no ownership over the FunctionDecl
/// nodes it contains. Rather, the FunctionDecls are owned by the
/// enclosing scope (which also owns the OverloadedFunctionDecl
/// node). OverloadedFunctionDecl is used primarily to store a set of
/// overloaded functions for name lookup.
class OverloadedFunctionDecl : public NamedDecl {
protected:
  OverloadedFunctionDecl(DeclContext *DC, DeclarationName N)
    : NamedDecl(OverloadedFunction, DC, SourceLocation(), N) { }

  /// Functions - the set of overloaded functions contained in this
  /// overload set.
  llvm::SmallVector<AnyFunctionDecl, 4> Functions;

  // FIXME: This should go away when we stop using
  // OverloadedFunctionDecl to store conversions in CXXRecordDecl.
  friend class CXXRecordDecl;

public:
  typedef llvm::SmallVector<AnyFunctionDecl, 4>::iterator function_iterator;
  typedef llvm::SmallVector<AnyFunctionDecl, 4>::const_iterator
    function_const_iterator;

  static OverloadedFunctionDecl