libstdc++-v3/testsuite/20_util/unreachable/1.cc

   1 // { dg-do compile { target c++23 } }
   2 // { dg-add-options no_pch }
   3
   4 #include <utility>
   5
   6 #ifndef __cpp_lib_unreachable
   7 # error "Feature-test macro for unreachable missing in <utility>"
   8 #elif __cpp_lib_unreachable != 202202L
   9 # error "Feature-test macro for unreachable has wrong value in <utility>"
  10 #endif
  11
  12 bool test01(int i)
  13 {
  14   if (i == 4)
  15     return true;
  16   std::unreachable();
  17 } // { dg-bogus "control reaches end of non-void function" }