clang/test/Parser/cxx2b-init-statement.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -verify=expected -std=c++23 -Wall %s
   2 // RUN: %clang_cc1 -fsyntax-only -verify=expected,expected-cxx20 -std=c++20 -Wall %s
   3
   4 namespace ns {
   5     int i;
   6     enum class e {};
   7 }
   8 void f() {
   9
  10     for (using foo = int;true;); //expected-cxx20-warning {{alias declaration in this context is a C++23 extension}}
  11
  12     switch(using foo = int; 0) { //expected-cxx20-warning {{alias declaration in this context is a C++23 extension}}
  13         case 0: break;
  14     }
  15
  16     if(using foo = int; false) {} //expected-cxx20-warning {{alias declaration in this context is a C++23 extension}}
  17
  18
  19     if (using enum ns::e; false){}  // expected-error {{expected '='}}
  20
  21     for (using ns::i; true;);  // expected-error {{expected '='}}
  22
  23     if (using ns::i; false){}  // expected-error {{expected '='}}
  24
  25     switch(using ns::i; 0) {   // expected-error {{expected '='}}
  26         case 0: break;
  27     }
  28
  29 }