================
@@ -6,11 +6,31 @@
// RUN: %clang_cc1 -std=c++23 -fexceptions -fcxx-exceptions -pedantic-errors
%s -verify-directives -verify=expected
// RUN: %clang_cc1 -std=c++2c -fexceptions -fcxx-exceptions -pedantic-errors
%s -verify-directives -verify=expected
-
+#if __cplusplus < 201103L
// expected-no-diagnostics
+#endif
namespace cwg3106 { // cwg3106: 2.7
#if __cplusplus >= 201103L
const char str[9] = R"(\u{1234})";
#endif
} // namespace cwg3106
+
+namespace cwg3179 { // cwg3179: 23 tentatively ready 2026-04-30
+#if __cplusplus >= 201103L
+ template<class> using void_t = void;
+ template<class T> struct S {
+ void f(void_t<T*>);
+ // expected-error@-1 {{'void' as parameter must not involve template
parameters}}
+
+ using X = int(void_t<T*>);
+ // expected-error@-1 {{'void' as parameter must not involve template
parameters}}
+ };
+ template<class T> void g(decltype((void)(T*)0));
+ // expected-error@-1 {{'void' as parameter must not involve template
parameters}}
+#endif
+#if __cplusplus >= 202002L
+ template<class T> bool v = requires(void_t<T>) { true; };
+ // expected-error@-1 {{'void' as parameter must not involve template
parameters}}
+#endif
+} // namespace cwg3159
----------------
h-vetinari wrote:
```suggestion
} // namespace cwg3179
```
https://github.com/llvm/llvm-project/pull/190495
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