clang/test/PCH/chain-default-argument-instantiation.cpp

   1 // Test default argument instantiation in chained PCH.
   2
   3 // Without PCH
   4 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 -include %s -include %s %s
   5
   6 // With PCH
   7 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s -chain-include %s -chain-include %s
   8
   9 // With modules
  10 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 -fmodules %s -chain-include %s -chain-include %s
  11
  12 // expected-no-diagnostics
  13
  14 #ifndef HEADER1
  15 #define HEADER1
  16 //===----------------------------------------------------------------------===//
  17 // Primary header.
  18
  19 namespace rdar23810407 {
  20   template<typename T> int f(T t) {
  21     extern T rdar23810407_variable;
  22     return 0;
  23   }
  24   template<typename T> int g(int a = f([] {}));
  25 }
  26
  27 //===----------------------------------------------------------------------===//
  28 #elif not defined(HEADER2)
  29 #define HEADER2
  30 #if !defined(HEADER1)
  31 #error Header inclusion order messed up
  32 #endif
  33
  34 //===----------------------------------------------------------------------===//
  35 // Dependent header.
  36
  37 inline void instantiate_once() {
  38   rdar23810407::g<int>();
  39 }
  40
  41 //===----------------------------------------------------------------------===//
  42 #else
  43 //===----------------------------------------------------------------------===//
  44
  45 void test() {
  46   rdar23810407::g<int>();
  47 }
  48
  49 //===----------------------------------------------------------------------===//
  50 #endif