[gcc r15-7534] c++: add fixed test [PR66519]

[Marek Polacek via Gcc-cvs]

https://gcc.gnu.org/g:9a6758edc229abc0ed0f5ce65958082b3e8a8502

commit r15-7534-g9a6758edc229abc0ed0f5ce65958082b3e8a8502
Author: Marek Polacek <pola...@redhat.com>
Date:   Fri Feb 14 13:14:01 2025 -0500

    c++: add fixed test [PR66519]
    
    Fixed by r10-6464.
    
            PR c++/66519
    
    gcc/testsuite/ChangeLog:
    
            * g++.dg/cpp0x/variadic-parm2.C: New test.

Diff:
---
 gcc/testsuite/g++.dg/cpp0x/variadic-parm2.C | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/gcc/testsuite/g++.dg/cpp0x/variadic-parm2.C 
b/gcc/testsuite/g++.dg/cpp0x/variadic-parm2.C
new file mode 100644
index 000000000000..b061adbd7a95
--- /dev/null
+++ b/gcc/testsuite/g++.dg/cpp0x/variadic-parm2.C
@@ -0,0 +1,12 @@
+// PR c++/66519
+// { dg-do compile { target c++11 } }
+
+template<typename F, typename... Tp>
+void a(F f, Tp... args, decltype(f(args...)) = 1) {}
+
+template<typename F, typename... Tp>
+void a(F, Tp...) {}
+
+void b(void) {
+    a([]{});
+}