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//======- AttributeCommonInfo.h - Base info about Attributes-----*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file defines the AttributeCommonInfo type, which is the base for a
// ParsedAttr and is used by Attr as a way to share info between the two.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_BASIC_ATTRIBUTECOMMONINFO_H
#define LLVM_CLANG_BASIC_ATTRIBUTECOMMONINFO_H
#include "clang/Basic/SourceLocation.h"
namespace clang {
class IdentifierInfo;
class ASTRecordWriter;
class AttributeCommonInfo {
public:
/// The style used to specify an attribute.
enum Syntax {
/// __attribute__((...))
AS_GNU,
/// [[...]]
AS_CXX11,
/// [[...]]
AS_C2x,
/// __declspec(...)
AS_Declspec,
/// [uuid("...")] class Foo
AS_Microsoft,
/// __ptr16, alignas(...), etc.
AS_Keyword,
/// #pragma ...
AS_Pragma,
// Note TableGen depends on the order above. Do not add or change the order
// without adding related code to TableGen/ClangAttrEmitter.cpp.
/// Context-sensitive version of a keyword attribute.
AS_ContextSensitiveKeyword,
};
enum Kind {
#define PARSED_ATTR(NAME) AT_##NAME,
#include "clang/Sema/AttrParsedAttrList.inc"
#undef PARSED_ATTR
NoSemaHandlerAttribute,
IgnoredAttribute,
UnknownAttribute,
};
private:
const IdentifierInfo *AttrName = nullptr;
const IdentifierInfo *ScopeName = nullptr;
SourceRange AttrRange;
const SourceLocation ScopeLoc;
// Corresponds to the Kind enum.
unsigned AttrKind : 16;
/// Corresponds to the Syntax enum.
unsigned SyntaxUsed : 3;
unsigned SpellingIndex : 4;
protected:
static constexpr unsigned SpellingNotCalculated = 0xf;
public:
AttributeCommonInfo(SourceRange AttrRange)
: AttrRange(AttrRange), ScopeLoc(), AttrKind(0), SyntaxUsed(0),
SpellingIndex(SpellingNotCalculated) {}
AttributeCommonInfo(SourceLocation AttrLoc)
: AttrRange(AttrLoc), ScopeLoc(), AttrKind(0), SyntaxUsed(0),
SpellingIndex(SpellingNotCalculated) {}
AttributeCommonInfo(const IdentifierInfo *AttrName,
const IdentifierInfo *ScopeName, SourceRange AttrRange,
SourceLocation ScopeLoc, Syntax SyntaxUsed)
: AttrName(AttrName), ScopeName(ScopeName), AttrRange(AttrRange),
ScopeLoc(ScopeLoc),
AttrKind(getParsedKind(AttrName, ScopeName, SyntaxUsed)),
SyntaxUsed(SyntaxUsed), SpellingIndex(SpellingNotCalculated) {}
AttributeCommonInfo(const IdentifierInfo *AttrName,
const IdentifierInfo *ScopeName, SourceRange AttrRange,
SourceLocation ScopeLoc, Kind AttrKind, Syntax SyntaxUsed)
: AttrName(AttrName), ScopeName(ScopeName), AttrRange(AttrRange),
ScopeLoc(ScopeLoc), AttrKind(AttrKind), SyntaxUsed(SyntaxUsed),
SpellingIndex(SpellingNotCalculated) {}
AttributeCommonInfo(const IdentifierInfo *AttrName,
const IdentifierInfo *ScopeName, SourceRange AttrRange,
SourceLocation ScopeLoc, Kind AttrKind, Syntax SyntaxUsed,
unsigned Spelling)
: AttrName(AttrName), ScopeName(ScopeName), AttrRange(AttrRange),
ScopeLoc(ScopeLoc), AttrKind(AttrKind), SyntaxUsed(SyntaxUsed),
SpellingIndex(Spelling) {}
AttributeCommonInfo(const IdentifierInfo *AttrName, SourceRange AttrRange,
Syntax SyntaxUsed)
: AttrName(AttrName), ScopeName(nullptr), AttrRange(AttrRange),
ScopeLoc(), AttrKind(getParsedKind(AttrName, ScopeName, SyntaxUsed)),
SyntaxUsed(SyntaxUsed), SpellingIndex(SpellingNotCalculated) {}
AttributeCommonInfo(SourceRange AttrRange, Kind K, Syntax SyntaxUsed)
: AttrName(nullptr), ScopeName(nullptr), AttrRange(AttrRange), ScopeLoc(),
AttrKind(K), SyntaxUsed(SyntaxUsed),
SpellingIndex(SpellingNotCalculated) {}
AttributeCommonInfo(SourceRange AttrRange, Kind K, Syntax SyntaxUsed,
unsigned Spelling)
: AttrName(nullptr), ScopeName(nullptr), AttrRange(AttrRange), ScopeLoc(),
AttrKind(K), SyntaxUsed(SyntaxUsed), SpellingIndex(Spelling) {}
AttributeCommonInfo(AttributeCommonInfo &&) = default;
AttributeCommonInfo(const AttributeCommonInfo &) = default;
Kind getParsedKind() const { return Kind(AttrKind); }
Syntax getSyntax() const { return Syntax(SyntaxUsed); }
const IdentifierInfo *getAttrName() const { return AttrName; }
SourceLocation getLoc() const { return AttrRange.getBegin(); }
SourceRange getRange() const { return AttrRange; }
void setRange(SourceRange R) { AttrRange = R; }
bool hasScope() const { return ScopeName; }
const IdentifierInfo *getScopeName() const { return ScopeName; }
SourceLocation getScopeLoc() const { return ScopeLoc; }
bool isDeclspecAttribute() const { return SyntaxUsed == AS_Declspec; }
bool isMicrosoftAttribute() const { return SyntaxUsed == AS_Microsoft; }
bool isGNUScope() const;
bool isAlignasAttribute() const {
// FIXME: Use a better mechanism to determine this.
return getParsedKind() == AT_Aligned && isKeywordAttribute();
}
bool isCXX11Attribute() const {
return SyntaxUsed == AS_CXX11 || isAlignasAttribute();
}
bool isC2xAttribute() const { return SyntaxUsed == AS_C2x; }
bool isKeywordAttribute() const {
return SyntaxUsed == AS_Keyword || SyntaxUsed == AS_ContextSensitiveKeyword;
}
bool isContextSensitiveKeywordAttribute() const {
return SyntaxUsed == AS_ContextSensitiveKeyword;
}
unsigned getAttributeSpellingListIndex() const {
assert((isAttributeSpellingListCalculated() || AttrName) &&
"Spelling cannot be found");
return isAttributeSpellingListCalculated()
? SpellingIndex
: calculateAttributeSpellingListIndex();
}
void setAttributeSpellingListIndex(unsigned V) { SpellingIndex = V; }
static Kind getParsedKind(const IdentifierInfo *Name,
const IdentifierInfo *Scope, Syntax SyntaxUsed);
private:
/// Get an index into the attribute spelling list
/// defined in Attr.td. This index is used by an attribute
/// to pretty print itself.
unsigned calculateAttributeSpellingListIndex() const;
friend class clang::ASTRecordWriter;
// Used exclusively by ASTDeclWriter to get the raw spelling list state.
unsigned getAttributeSpellingListIndexRaw() const { return SpellingIndex; }
protected:
bool isAttributeSpellingListCalculated() const {
return SpellingIndex != SpellingNotCalculated;
}
};
} // namespace clang
#endif // LLVM_CLANG_BASIC_ATTRIBUTECOMMONINFO_H
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