Support alternate attribute spelling __enable_if__
Attribute names usually support an alternate spelling that uses double
underscores before and after the attribute name, like e.g. attribute
((__aligned__)) for attribute ((aligned)). This is necessary to allow
use of attributes in system headers without polluting the name space.
However, for attribute ((enable_if)) that alternate spelling does not
work correctly. This is because of code in Parser::ParseGNUAttributeArgs
(ParseDecl.cpp) that specifically checks for the "enable_if" spelling
without allowing the alternate spelling.
Similar code in ParseDecl.cpp uses the normalizeAttrName helper to allow
both spellings. This patch adds use of that helper for the "enable_if"
check as well, which fixes attribute ((__enable_if__)).
Differential Revision: http://reviews.llvm.org/D11142
llvm-svn: 242029
diff --git a/clang/lib/Parse/ParseDecl.cpp b/clang/lib/Parse/ParseDecl.cpp
index bc253f7..f46af88 100644
--- a/clang/lib/Parse/ParseDecl.cpp
+++ b/clang/lib/Parse/ParseDecl.cpp
@@ -365,7 +365,8 @@
// These may refer to the function arguments, but need to be parsed early to
// participate in determining whether it's a redeclaration.
std::unique_ptr<ParseScope> PrototypeScope;
- if (AttrName->isStr("enable_if") && D && D->isFunctionDeclarator()) {
+ if (normalizeAttrName(AttrName->getName()) == "enable_if" &&
+ D && D->isFunctionDeclarator()) {
DeclaratorChunk::FunctionTypeInfo FTI = D->getFunctionTypeInfo();
PrototypeScope.reset(new ParseScope(this, Scope::FunctionPrototypeScope |
Scope::FunctionDeclarationScope |