Support &__uuidof(type) as a non type template argument.
This idiom is used everywhere in MFC/COM code and as such this patch removes hundreds of errors when parsing MFC code with clang.
Example:
template <class T, const GUID* g = &__uuidof(T)>
class ComTemplate { };
typedef ComTemplate<struct_with_uuid, &__uuidof(struct_with_uuid)> COM_TYPE;
Of course this is just parsing support. Trying to use this in CodeGen will generate:
error: cannot yet mangle expression type CXXUuidofExpr
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@130381 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaTemplate.cpp b/lib/Sema/SemaTemplate.cpp
index 3deeedc..ae80181 100644
--- a/lib/Sema/SemaTemplate.cpp
+++ b/lib/Sema/SemaTemplate.cpp
@@ -3093,6 +3093,15 @@
bool AddressTaken = false;
SourceLocation AddrOpLoc;
if (UnaryOperator *UnOp = dyn_cast<UnaryOperator>(Arg)) {
+
+ // Support &__uuidof(class_with_uuid) as a non-type template argument.
+ // Very common in Microsoft COM headers.
+ if (S.getLangOptions().Microsoft &&
+ isa<CXXUuidofExpr>(UnOp->getSubExpr())) {
+ Converted = TemplateArgument(ArgIn);
+ return false;
+ }
+
if (UnOp->getOpcode() == UO_AddrOf) {
DRE = dyn_cast<DeclRefExpr>(UnOp->getSubExpr());
AddressTaken = true;