clang/test/CXX/drs/cwg8xx.cpp

   1 // RUN: %clang_cc1 -std=c++98 -triple x86_64-unknown-unknown %s -verify=expected,cxx98-17 -fexceptions -fcxx-exceptions -pedantic-errors
   2 // RUN: %clang_cc1 -std=c++11 -triple x86_64-unknown-unknown %s -verify=expected,cxx98-17,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
   3 // RUN: %clang_cc1 -std=c++14 -triple x86_64-unknown-unknown %s -verify=expected,cxx98-17,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
   4 // RUN: %clang_cc1 -std=c++17 -triple x86_64-unknown-unknown %s -verify=expected,cxx98-17,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
   5 // RUN: %clang_cc1 -std=c++20 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx20,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
   6 // RUN: %clang_cc1 -std=c++23 -triple x86_64-unknown-unknown %s -verify=expected,since-cxx20,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
   7 // RUN: %clang_cc1 -std=c++2c -triple x86_64-unknown-unknown %s -verify=expected,since-cxx20,since-cxx11 -fexceptions -fcxx-exceptions -pedantic-errors
   8
   9 namespace cwg820 { // cwg820: 2.7
  10 export template <class T> struct B {};
  11 // cxx98-17-warning@-1 {{exported templates are unsupported}}
  12 // since-cxx20-error@-2 {{export declaration can only be used within a module purview}}
  13 export template<typename T> void f() {}
  14 // cxx98-17-warning@-1 {{exported templates are unsupported}}
  15 // since-cxx20-error@-2 {{export declaration can only be used within a module purview}}
  16 }
  17
  18 namespace cwg873 { // cwg873: 3.0
  19 #if __cplusplus >= 201103L
  20 template <typename T> void f(T &&);
  21 template <> void f(int &) = delete;  // #cwg873-lvalue-ref
  22 template <> void f(int &&) = delete; // #cwg873-rvalue-ref
  23 void g(int i) {
  24   f(i); // calls f<int&>(int&)
  25   // since-cxx11-error@-1 {{call to deleted function 'f'}}
  26   //   since-cxx11-note@#cwg873-lvalue-ref {{candidate function [with T = int &] has been implicitly deleted}}
  27   f(0); // calls f<int>(int&&)
  28   // since-cxx11-error@-1 {{call to deleted function 'f'}}
  29   //   since-cxx11-note@#cwg873-rvalue-ref {{candidate function [with T = int] has been implicitly deleted}}
  30 }
  31 #endif
  32 } // namespace cwg873
  33
  34 // cwg882: 3.5
  35 #if __cplusplus >= 201103L
  36 int main() = delete;
  37 // since-cxx11-error@-1 {{'main' is not allowed to be deleted}}
  38 #endif