clang/test/PCH/pch-instantiate-templates-forward-decl.cpp

   1 // Test this without pch.
   2 // RUN: %clang_cc1 -fsyntax-only %s -DBODY
   3
   4 // Test with pch.
   5 // RUN: %clang_cc1 -emit-pch -o %t %s
   6 // RUN: %clang_cc1 -include-pch %t -fsyntax-only %s -DBODY
   7
   8 // Test with pch with template instantiation in the pch.
   9 // RUN: %clang_cc1 -emit-pch -fpch-instantiate-templates -o %t %s -verify
  10
  11 #ifndef HEADER_H
  12 #define HEADER_H
  13
  14 template <typename T>
  15 void f();
  16 struct X;            // @16
  17 void g() { f<X>(); } // @17 instantiation not performed yet
  18
  19 template <typename T>
  20 void f() { T t; }; // @20
  21
  22 #endif
  23
  24 #ifdef BODY
  25 struct X {};
  26 #endif
  27
  28 // expected-error@20 {{variable has incomplete type}}
  29 // expected-note@17 {{in instantiation of function template specialization}}
  30 // expected-note@16 {{forward declaration}}