clang/test/CXX/dcl.dcl/dcl.attr/dcl.attr.nodiscard/p3.cpp

   1 // RUN: %clang_cc1 -std=c++1z -verify %s
   2
   3 namespace std_example {
   4   struct [[nodiscard]] error_info{
   5     // ...
   6   };
   7
   8   error_info enable_missile_safety_mode();
   9   void launch_missiles();
  10   void test_missiles() {
  11     enable_missile_safety_mode(); // expected-warning {{ignoring return value of type 'error_info' declared with 'nodiscard'}}
  12     launch_missiles();
  13   }
  14
  15   error_info &foo();
  16   void f() { foo(); } // no warning
  17 }