xref: /aosp_15_r20/external/clang/test/SemaCXX/warn-unused-attribute.cpp (revision 67e74705e28f6214e480b399dd47ea732279e315)
1*67e74705SXin Li // RUN: %clang_cc1 -fsyntax-only -Wunused-variable -verify %s
2*67e74705SXin Li struct __attribute__((warn_unused)) Test {
3*67e74705SXin Li   Test();
4*67e74705SXin Li   ~Test();
5*67e74705SXin Li   void use();
6*67e74705SXin Li };
7*67e74705SXin Li 
8*67e74705SXin Li struct TestNormal {
9*67e74705SXin Li   TestNormal();
10*67e74705SXin Li };
11*67e74705SXin Li 
main(void)12*67e74705SXin Li int main(void) {
13*67e74705SXin Li   Test unused;         // expected-warning {{unused variable 'unused'}}
14*67e74705SXin Li   Test used;
15*67e74705SXin Li   TestNormal normal;
16*67e74705SXin Li   used.use();
17*67e74705SXin Li 
18*67e74705SXin Li   int i __attribute__((warn_unused)) = 12; // expected-warning {{'warn_unused' attribute only applies to struct, union or class}}
19*67e74705SXin Li   return i;
20*67e74705SXin Li }
21