clang/test/SemaCXX/attr-unused.cpp

   1 // RUN: %clang_cc1 -verify -Wunused -Wused-but-marked-unused -fsyntax-only %s
   2
   3 namespace ns_unused { typedef int Int_unused __attribute__((unused)); }
   4 namespace ns_not_unused { typedef int Int_not_unused; }
   5
   6 template <typename T> class C;
   7 template <> class __attribute__((unused)) C<int> {};
   8
   9 void f() {
  10   ns_not_unused::Int_not_unused i1; // expected-warning {{unused variable}}
  11   ns_unused::Int_unused i0; // expected-warning {{'Int_unused' was marked unused but was used}}
  12
  13   union __attribute__((unused)) { // expected-warning {{was marked unused but was used}}
  14     int i;
  15   };
  16   (void) i;
  17
  18   C<int>(); // expected-warning {{'C<int>' was marked unused but was used}}
  19 }