Attributes.cpp
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#include "clang/Basic/Attributes.h"
#include "clang/Basic/AttrSubjectMatchRules.h"
#include "clang/Basic/AttributeCommonInfo.h"
#include "clang/Basic/IdentifierTable.h"
#include "llvm/ADT/StringSwitch.h"
using namespace clang;
int clang::hasAttribute(AttrSyntax Syntax, const IdentifierInfo *Scope,
const IdentifierInfo *Attr, const TargetInfo &Target,
const LangOptions &LangOpts) {
StringRef Name = Attr->getName();
// Normalize the attribute name, __foo__ becomes foo.
if (Name.size() >= 4 && Name.startswith("__") && Name.endswith("__"))
Name = Name.substr(2, Name.size() - 4);
// Normalize the scope name, but only for gnu and clang attributes.
StringRef ScopeName = Scope ? Scope->getName() : "";
if (ScopeName == "__gnu__")
ScopeName = "gnu";
else if (ScopeName == "_Clang")
ScopeName = "clang";
#include "clang/Basic/AttrHasAttributeImpl.inc"
return 0;
}
const char *attr::getSubjectMatchRuleSpelling(attr::SubjectMatchRule Rule) {
switch (Rule) {
#define ATTR_MATCH_RULE(NAME, SPELLING, IsAbstract) \
case attr::NAME: \
return SPELLING;
#include "clang/Basic/AttrSubMatchRulesList.inc"
}
llvm_unreachable("Invalid subject match rule");
}
static StringRef
normalizeAttrScopeName(const IdentifierInfo *Scope,
AttributeCommonInfo::Syntax SyntaxUsed) {
if (!Scope)
return "";
// Normalize the "__gnu__" scope name to be "gnu" and the "_Clang" scope name
// to be "clang".
StringRef ScopeName = Scope->getName();
if (SyntaxUsed == AttributeCommonInfo::AS_CXX11 ||
SyntaxUsed == AttributeCommonInfo::AS_C2x) {
if (ScopeName == "__gnu__")
ScopeName = "gnu";
else if (ScopeName == "_Clang")
ScopeName = "clang";
}
return ScopeName;
}
static StringRef normalizeAttrName(const IdentifierInfo *Name,
StringRef NormalizedScopeName,
AttributeCommonInfo::Syntax SyntaxUsed) {
// Normalize the attribute name, __foo__ becomes foo. This is only allowable
// for GNU attributes, and attributes using the double square bracket syntax.
bool ShouldNormalize =
SyntaxUsed == AttributeCommonInfo::AS_GNU ||
((SyntaxUsed == AttributeCommonInfo::AS_CXX11 ||
SyntaxUsed == AttributeCommonInfo::AS_C2x) &&
(NormalizedScopeName.empty() || NormalizedScopeName == "gnu" ||
NormalizedScopeName == "clang"));
StringRef AttrName = Name->getName();
if (ShouldNormalize && AttrName.size() >= 4 && AttrName.startswith("__") &&
AttrName.endswith("__"))
AttrName = AttrName.slice(2, AttrName.size() - 2);
return AttrName;
}
bool AttributeCommonInfo::isGNUScope() const {
return ScopeName && (ScopeName->isStr("gnu") || ScopeName->isStr("__gnu__"));
}
#include "clang/Sema/AttrParsedAttrKinds.inc"
static SmallString<64> normalizeName(const IdentifierInfo *Name,
const IdentifierInfo *Scope,
AttributeCommonInfo::Syntax SyntaxUsed) {
StringRef ScopeName = normalizeAttrScopeName(Scope, SyntaxUsed);
StringRef AttrName = normalizeAttrName(Name, ScopeName, SyntaxUsed);
SmallString<64> FullName = ScopeName;
if (!ScopeName.empty()) {
assert(SyntaxUsed == AttributeCommonInfo::AS_CXX11 ||
SyntaxUsed == AttributeCommonInfo::AS_C2x);
FullName += "::";
}
FullName += AttrName;
return FullName;
}
AttributeCommonInfo::Kind
AttributeCommonInfo::getParsedKind(const IdentifierInfo *Name,
const IdentifierInfo *ScopeName,
Syntax SyntaxUsed) {
return ::getAttrKind(normalizeName(Name, ScopeName, SyntaxUsed), SyntaxUsed);
}
std::string AttributeCommonInfo::getNormalizedFullName() const {
return static_cast<std::string>(
normalizeName(getAttrName(), getScopeName(), getSyntax()));
}
unsigned AttributeCommonInfo::calculateAttributeSpellingListIndex() const {
// Both variables will be used in tablegen generated
// attribute spell list index matching code.
auto Syntax = static_cast<AttributeCommonInfo::Syntax>(getSyntax());
StringRef Scope = normalizeAttrScopeName(getScopeName(), Syntax);
StringRef Name = normalizeAttrName(getAttrName(), Scope, Syntax);
#include "clang/Sema/AttrSpellingListIndex.inc"
}