29 lines · cpp
1// RUN: %clang_cc1 -verify -std=c++23 -Wall -Wshadow %s2 3void 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}29