re PR c++/53763 (Missing error check on decltype when used within variadic template argument list)

2012-10-09  Paolo Carlini  <paolo.carlini@oracle.com>

	PR c++/53763
	* g++.dg/cpp0x/decltype43.C: New.

From-SVN: r192263

gcc/testsuite/ChangeLog

 2012-10-09  Paolo Carlini  <paolo.carlini@oracle.com>
 
+	PR c++/53763
+	* g++.dg/cpp0x/decltype43.C: New.
+
+2012-10-09  Paolo Carlini  <paolo.carlini@oracle.com>
+
 	PR c++/54194
 	* g++.dg/warn/Wparentheses-26.C: Adjust.
 	* g++.dg/warn/Wparentheses-27.C: New.

gcc/testsuite/g++.dg/cpp0x/decltype43.C

+// PR c++/53763
+// { dg-do compile { target c++11 } }
+
+template<typename TYPE>
+struct A
+{
+  static int a(TYPE value)
+  {
+    return value;
+  }
+};
+
+template<typename... ARGS>
+struct B
+{
+  static int b(ARGS...)
+  {
+    return 0;
+  }
+};
+
+int main()
+{
+  int x = B<decltype(A<int>::a(1))>::b(A<int>::a(1));
+  int y = B<decltype(A     ::a(2))>::b(A<int>::a(2)); // { dg-error "template argument" }
+  return x + y;
+}