================
@@ -0,0 +1,5 @@
+// RUN: %clang_cc1 -std=c++17 -fsyntax-only -verify %s
+
+template <template <typename> class C> struct S { // expected-note {{template
is declared here}}
+ friend C(); //expected-error {{cannot specify deduction guide for template
template parameter 'C'}}
----------------
Sirraide wrote:
I think we're getting very confused because this essentially looks like a
friend-qualified constructor declaration (because `C` is a class name here),
but I’m not sure where exactly we should best be rejecting this.
https://github.com/llvm/llvm-project/pull/223213
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