When instantiating a friend function template, don't forget to inherit default template arguments from other declarations.
llvm-svn: 302603
diff --git a/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp b/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
index 226bd60..03df6fd 100644
--- a/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
+++ b/clang/lib/Sema/SemaTemplateInstantiateDecl.cpp
@@ -1849,6 +1849,19 @@
}
}
}
+
+ // Check the template parameter list against the previous declaration. The
+ // goal here is to pick up default arguments added since the friend was
+ // declared; we know the template parameter lists match, since otherwise
+ // we would not have picked this template as the previous declaration.
+ if (TemplateParams && FunctionTemplate->getPreviousDecl()) {
+ SemaRef.CheckTemplateParameterList(
+ TemplateParams,
+ FunctionTemplate->getPreviousDecl()->getTemplateParameters(),
+ Function->isThisDeclarationADefinition()
+ ? Sema::TPC_FriendFunctionTemplateDefinition
+ : Sema::TPC_FriendFunctionTemplate);
+ }
}
if (Function->isLocalExternDecl() && !Function->getPreviousDecl())