clang/test/PCH/cxx-variadic-templates-with-default-params.cpp

   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 // RUN: %clang_cc1 -std=c++11 -x c++-header -emit-pch -fpch-instantiate-templates -o %t %s
   9 // RUN: %clang_cc1 -std=c++11 -include-pch %t -fsyntax-only -verify %s
  10
  11 // expected-no-diagnostics
  12
  13 // PR25271: Ensure that default template arguments prior to a parameter pack
  14 // successfully round-trip.
  15 #ifndef HEADER
  16 #define HEADER
  17 template<unsigned T=123, unsigned... U>
  18 class dummy;
  19
  20 template<unsigned T, unsigned... U>
  21 class dummy {
  22     int field[T];
  23 };
  24 #else
  25 void f() {
  26     dummy<> x;
  27     (void)x;
  28 }
  29 #endif