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//===--- Attr.h - Classes for representing attributes ----------*- 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 "clang/AST/AttrIterator.h"
#include "clang/AST/Decl.h"
#include "clang/AST/Expr.h"
#include "clang/AST/Type.h"
#include "clang/Basic/AttrKinds.h"
#include "clang/Basic/LLVM.h"
#include "clang/Basic/OpenMPKinds.h"
#include "clang/Basic/Sanitizers.h"
#include "clang/Basic/SourceLocation.h"
#include "clang/Basic/VersionTuple.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include <cassert>
namespace clang {
class ASTContext;
class IdentifierInfo;
class ObjCInterfaceDecl;
class Expr;
class QualType;
class FunctionDecl;
class TypeSourceInfo;
/// Attr - This represents one attribute.
class Attr {
private:
SourceRange Range;
unsigned AttrKind : 16;
protected:
/// An index into the spelling list of an
/// attribute defined in Attr.td file.
unsigned SpellingListIndex : 4;
unsigned Inherited : 1;
unsigned IsPackExpansion : 1;
unsigned Implicit : 1;
unsigned IsLateParsed : 1;
unsigned DuplicatesAllowed : 1;
void *operator new(size_t bytes) noexcept {
llvm_unreachable("Attrs cannot be allocated with regular 'new'.");
}
void operator delete(void *data) noexcept {
llvm_unreachable("Attrs cannot be released with regular 'delete'.");
}
public:
// Forward so that the regular new and delete do not hide global ones.
void *operator new(size_t Bytes, ASTContext &C,
size_t Alignment = 8) noexcept {
return ::operator new(Bytes, C, Alignment);
}
void operator delete(void *Ptr, ASTContext &C, size_t Alignment) noexcept {
return ::operator delete(Ptr, C, Alignment);
}
protected:
Attr(attr::Kind AK, SourceRange R, unsigned SpellingListIndex,
bool IsLateParsed, bool DuplicatesAllowed)
: Range(R), AttrKind(AK), SpellingListIndex(SpellingListIndex),
Inherited(false), IsPackExpansion(false), Implicit(false),
IsLateParsed(IsLateParsed), DuplicatesAllowed(DuplicatesAllowed) {}
public:
attr::Kind getKind() const {
return static_cast<attr::Kind>(AttrKind);
}
unsigned getSpellingListIndex() const { return SpellingListIndex; }
const char *getSpelling() const;
SourceLocation getLocation() const { return Range.getBegin(); }
SourceRange getRange() const { return Range; }
void setRange(SourceRange R) { Range = R; }
bool isInherited() const { return Inherited; }
/// \brief Returns true if the attribute has been implicitly created instead
/// of explicitly written by the user.
bool isImplicit() const { return Implicit; }
void setImplicit(bool I) { Implicit = I; }
void setPackExpansion(bool PE) { IsPackExpansion = PE; }
bool isPackExpansion() const { return IsPackExpansion; }
// Clone this attribute.
Attr *clone(ASTContext &C) const;
bool isLateParsed() const { return IsLateParsed; }
// Pretty print this attribute.
void printPretty(raw_ostream &OS, const PrintingPolicy &Policy) const;
/// \brief By default, attributes cannot be duplicated when being merged;
/// however, an attribute can override this. Returns true if the attribute
/// can be duplicated when merging.
bool duplicatesAllowed() const { return DuplicatesAllowed; }
};
class StmtAttr : public Attr {
protected:
StmtAttr(attr::Kind AK, SourceRange R, unsigned SpellingListIndex,
bool IsLateParsed, bool DuplicatesAllowed)
: Attr(AK, R, SpellingListIndex, IsLateParsed, DuplicatesAllowed) {}
public:
static bool classof(const Attr *A) {
return A->getKind() >= attr::FirstStmtAttr &&
A->getKind() <= attr::LastStmtAttr;
}
};
class InheritableAttr : public Attr {
protected:
InheritableAttr(attr::Kind AK, SourceRange R, unsigned SpellingListIndex,
bool IsLateParsed, bool DuplicatesAllowed)
: Attr(AK, R, SpellingListIndex, IsLateParsed, DuplicatesAllowed) {}
public:
void setInherited(bool I) { Inherited = I; }
// Implement isa/cast/dyncast/etc.
static bool classof(const Attr *A) {
return A->getKind() >= attr::FirstInheritableAttr &&
A->getKind() <= attr::LastInheritableAttr;
}
};
class InheritableParamAttr : public InheritableAttr {
protected:
InheritableParamAttr(attr::Kind AK, SourceRange R, unsigned SpellingListIndex,
bool IsLateParsed, bool DuplicatesAllowed)
: InheritableAttr(AK, R, SpellingListIndex, IsLateParsed,
DuplicatesAllowed) {}
public:
// Implement isa/cast/dyncast/etc.
static bool classof(const Attr *A) {
return A->getKind() >= attr::FirstInheritableParamAttr &&
A->getKind() <= attr::LastInheritableParamAttr;
}
};
/// A parameter attribute which changes the argument-passing ABI rule
/// for the parameter.
class ParameterABIAttr : public InheritableParamAttr {
protected:
ParameterABIAttr(attr::Kind AK, SourceRange R,
unsigned SpellingListIndex, bool IsLateParsed,
bool DuplicatesAllowed)
: InheritableParamAttr(AK, R, SpellingListIndex, IsLateParsed,
DuplicatesAllowed) {}
public:
ParameterABI getABI() const {
switch (getKind()) {
case attr::SwiftContext:
return ParameterABI::SwiftContext;
case attr::SwiftErrorResult:
return ParameterABI::SwiftErrorResult;
case attr::SwiftIndirectResult:
return ParameterABI::SwiftIndirectResult;
default:
llvm_unreachable("bad parameter ABI attribute kind");
}
}
static bool classof(const Attr *A) {
return A->getKind() >= attr::FirstParameterABIAttr &&
A->getKind() <= attr::LastParameterABIAttr;
}
};
#include "clang/AST/Attrs.inc"
inline const DiagnosticBuilder &operator<<(const DiagnosticBuilder &DB,
const Attr *At) {
DB.AddTaggedVal(reinterpret_cast<intptr_t>(At),
DiagnosticsEngine::ak_attr);
return DB;
}
inline const PartialDiagnostic &operator<<(const PartialDiagnostic &PD,
const Attr *At) {
PD.AddTaggedVal(reinterpret_cast<intptr_t>(At),
DiagnosticsEngine::ak_attr);
return PD;
}
} // end namespace clang
#endif
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