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

   1 // Test this without pch, template will be instantiated.
   2 // RUN: %clang_cc1 -fsyntax-only %s -verify=expected
   3
   4 // Test with pch, template will be instantiated in the TU.
   5 // RUN: %clang_cc1 -emit-pch -o %t %s -verify=ok
   6 // RUN: %clang_cc1 -include-pch %t -fsyntax-only %s -verify=expected
   7
   8 // Test with pch with template instantiation in the pch.
   9 // RUN: %clang_cc1 -emit-pch -fpch-instantiate-templates -o %t %s -verify=expected
  10
  11 // ok-no-diagnostics
  12
  13 #ifndef HEADER_H
  14 #define HEADER_H
  15
  16 template <typename T>
  17 struct A {
  18   T foo() const { return "test"; } // @18
  19 };
  20
  21 double bar(A<double> *a) {
  22   return a->foo(); // @22
  23 }
  24
  25 #endif
  26
  27 // expected-error@18 {{cannot initialize return object}}
  28 // expected-note@22 {{in instantiation of member function}}