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

   1 // RUN: %clang_cc1 -verify -std=c++23 -Wall -Wshadow %s
   2
   3 void f() {
   4
   5     for (using foo = int;true;) {} //expected-warning {{unused type alias 'foo'}}
   6
   7     switch(using foo = int; 0) { //expected-warning {{unused type alias 'foo'}}
   8         case 0: break;
   9     }
  10
  11     if(using foo = int; false) {} // expected-warning {{unused type alias 'foo'}}
  12
  13     int x; // expected-warning {{unused variable 'x'}}
  14     if(using x = int; true) {}  // expected-warning {{unused type alias 'x'}}
  15
  16     using y = int; // expected-warning {{unused type alias 'y'}} \
  17                    // expected-note 2{{previous declaration is here}}
  18
  19     if(using y = double; true) {}  // expected-warning {{unused type alias 'y'}} \
  20                                    // expected-warning {{declaration shadows a type alias in function 'f'}}
  21
  22     for(using y = double; true;) { // expected-warning {{declaration shadows a type alias in function 'f'}}
  23         y foo = 0;
  24         (void)foo;
  25         constexpr y var = 0;
  26         static_assert(var == 0);
  27     }
  28 }