1 // Test this without pch.
2 // RUN: %clang_cc1 -std=c++11 -include %s -fsyntax-only -verify %s
3 
4 // Test with pch.
5 // RUN: %clang_cc1 -std=c++11 -x c++-header -emit-pch -o %t %s
6 // RUN: %clang_cc1 -std=c++11 -include-pch %t -fsyntax-only -verify %s
7 
8 // expected-no-diagnostics
9 
10 // PR25271: Ensure that default template arguments prior to a parameter pack
11 // successfully round-trip.
12 #ifndef HEADER
13 #define HEADER
14 template<unsigned T=123, unsigned... U>
15 class dummy;
16 
17 template<unsigned T, unsigned... U>
18 class dummy {
19     int field[T];
20 };
21 #else
22 void f() {
23     dummy<> x;
24     (void)x;
25 }
26 #endif
27