clang/test/CXX/temp/temp.spec/cxx1y-variable-template-no-body.cpp

   1 // RUN: %clang_cc1 --std=c++1y -fsyntax-only -verify %s
   2 // RUN: cp %s %t
   3 // RUN: not %clang_cc1 --std=c++1y -x c++ -fixit %t -DFIXING
   4 // RUN: %clang_cc1 --std=c++1y -x c++ %t -DFIXING
   5
   6 template<typename T>
   7 T pi = T(3.1415926535897932385); // expected-note {{template is declared here}}
   8
   9 template int pi<int>;
  10
  11 #ifndef FIXING
  12 template float pi<>; // expected-error {{too few template arguments for variable template 'pi'}}
  13 template double pi_var0; // expected-error {{explicit instantiation of 'pi_var0' does not refer to a function template, variable template, member function, member class, or static data member}}
  14 #endif
  15
  16 // Should recover as if definition
  17 template double pi_var = 5; // expected-error {{variable cannot be defined in an explicit instantiation; if this declaration is meant to be a variable definition, remove the 'template' keyword}}
  18 #ifndef FIXING
  19 template<typename T>
  20 T pi0 = T(3.1415926535897932385); // expected-note {{previous definition is here}}
  21
  22 template int pi0 = 10; // expected-error {{variable cannot be defined in an explicit instantiation; if this declaration is meant to be a variable definition, remove the 'template' keyword}} \
  23                           expected-error{{redefinition of 'pi0' as different kind of symbol}}
  24 #endif
  25
  26 template<typename T>
  27 T pi1 = T(3.1415926535897932385); // expected-note 0-2 {{here}}
  28
  29 // Should recover as if specialization
  30 template float pi1<float> = 1.0;  // expected-error {{explicit template instantiation cannot have a definition; if this definition is meant to be an explicit specialization, add '<>' after the 'template' keyword}}
  31 namespace expected_global {
  32 #ifndef FIXING
  33   template int pi1<int> = 10;  // expected-error {{explicit template instantiation cannot have a definition; if this definition is meant to be an explicit specialization, add '<>' after the 'template' keyword}} expected-error {{must occur at global scope}}
  34 #endif
  35 }