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

//===--- Attr.h - Classes for representing expressions ----------*- 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 Attr interface and subclasses.
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_CLANG_AST_ATTR_H
#define LLVM_CLANG_AST_ATTR_H

#include <cassert>
#include <cstring>
#include <string>
#include <algorithm>

namespace clang {

/// Attr - This represents one attribute.
class Attr {
public:
  enum Kind {
    Alias,
    Aligned,
    AlwaysInline,
    Annotate,
    AsmLabel, // Represent GCC asm label extension.
    Constructor,
    Deprecated,
    Destructor,
    DLLImport,
    DLLExport,
    FastCall,    
    Format,
    IBOutletKind, // Clang-specific.  Use "Kind" suffix to not conflict with
    NonNull,
    NoReturn,
    NoThrow,
    ObjCGC,
    Packed,
    StdCall,
    TransparentUnion,
    Unused,    
    Visibility,
    Weak,
    Blocks,
    Const,
    Pure
  };
    
private:
  Attr *Next;
  Kind AttrKind;
  
protected:
  Attr(Kind AK) : Next(0), AttrKind(AK) {}
public:
  virtual ~Attr() {
    delete Next;
  }

  Kind getKind() const { return AttrKind; }

  Attr *getNext() { return Next; }
  const Attr *getNext() const { return Next; }
  void setNext(Attr *next) { Next = next; }
  
  void addAttr(Attr *attr) {
    assert((attr != 0) && "addAttr(): attr is null");
    
    // FIXME: This doesn't preserve the order in any way.
    attr->Next = Next;
    Next = attr;
  }
  
  // Implement isa/cast/dyncast/etc.
  static bool classof(const Attr *) { return true; }
};

class PackedAttr : public Attr {
  unsigned Alignment;

public:
  PackedAttr(unsigned alignment) : Attr(Packed), Alignment(alignment) {}

  /// getAlignment - The specified alignment in bits.
  unsigned getAlignment() const { return Alignment; }

  // Implement isa/cast/dyncast/etc.
  static bool classof(const Attr *A) {
    return A->getKind() == Packed;
  }
  static bool classof(const PackedAttr *A) { return true; }
};
  
class AlignedAttr : public Attr {
  unsigned Alignment;
public:
  AlignedAttr(unsigned alignment) : Attr(Aligned), Alignment(alignment) {}

  /// getAlignment - The specified alignment in bits.
  unsigned getAlignment() const { return Alignment; }
  
  // Implement isa/cast/dyncast/etc.
  static bool classof(const Attr *A) {
    return A->getKind() == Aligned;
  }
  static bool classof(const AlignedAttr *A) { return true; }
};

class AnnotateAttr : public Attr {
  std::string Annotation;
public:
  AnnotateAttr(const std::string &ann) : Attr(Annotate), Annotation(ann) {}
  
  const std::string& getAnnotation() const { return Annotation; }
  
  // Implement isa/cast/dyncast/etc.
  static bool classof(const Attr *A) {
    return A->getKind() == Annotate;
  }
  static bool classof(const AnnotateAttr *A) { return true; }
};

class AsmLabelAttr : public Attr {
  std::string Label;
public:
  AsmLabelAttr(const std::string &L) : Attr(AsmLabel), Label(L) {}
  
  const std::string& getLabel() const { return Label; }
  
  // Implement isa/cast/dyncast/etc.
  static bool classof(const Attr *A) {
    return A->getKind() == AsmLabel;
  }
  static bool classof(const AsmLabelAttr *A) { return true; }
};

class AlwaysInlineAttr : public Attr {
public:
  AlwaysInlineAttr() : Attr(AlwaysInline) {}

  // Implement isa/cast/dyncast/etc.

  static bool classof(const Attr *A) { return A->getKind() == AlwaysInline; }
  static bool classof(const AlwaysInlineAttr *A) { return true; }
};

class AliasAttr : public Attr {
  std::string Aliasee;
public:
  AliasAttr(const std::string &aliasee) : Attr(Alias), Aliasee(aliasee) {}

  const std::string& getAliasee() const { return Aliasee; }

  // Implement isa/cast/dyncast/etc.

  static bool classof(const Attr *A) { return A->getKind() == Alias; }
  static bool classof(const AliasAttr *A) { return true; }
};

class ConstructorAttr : public Attr {
  int priority;
public:
  ConstructorAttr(int p) : Attr(Constructor), priority(p) {}

  int getPriority() const { return priority; }
  
  // Implement isa/cast/dyncast/etc.
  static bool classof(const Attr *A) { return A->getKind() == Constructor; }  
  static bool classof(const ConstructorAttr *A) { return true; }
};  
  
class DestructorAttr : public Attr {
  int priority;
public:
  DestructorAttr(int p) : Attr(Destructor), priority(p) {}

  int getPriority() const { return priority; }
  
  // Implement isa/cast/dyncast/etc.
  static bool classof(const Attr *A) { return A->getKind() == Destructor; }  
  static bool classof(const DestructorAttr *A) { return true; }
};  
    
class IBOutletAttr : public Attr {
public:
  IBOutletAttr() : Attr(IBOutletKind) {}
  
  // Implement isa/cast/dyncast/etc.
  static bool classof(const Attr *A) {
    return A->getKind() == IBOutletKind;
  }
  static bool classof(const IBOutletAttr *A) { return true; }
};

class NoReturnAttr : public Attr {
public:
  NoReturnAttr() : Attr(NoReturn) {}
  
  // Implement isa/cast/dyncast/etc.
  
  static bool classof(const Attr *A) { return A->getKind() == NoReturn; }  
  static bool classof(const NoReturnAttr *A) { return true; }
};

class DeprecatedAttr : public Attr {
public:
  DeprecatedAttr() : Attr(Deprecated) {}

  // Implement isa/cast/dyncast/etc.

  static bool classof(const Attr *A) { return A->getKind() == Deprecated; }
  static bool classof(const DeprecatedAttr *A) { return true; }
};

class UnusedAttr : public Attr {
public:
  UnusedAttr() : Attr(Unused) {}
  
  // Implement isa/cast/dyncast/etc.
  static bool classof(const Attr *A) { return A->getKind() == Unused; }  
  static bool classof(const UnusedAttr *A) { return true; }
};  
  
class WeakAttr : public Attr {