--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/gcc/testsuite/g++.dg/cpp1z/nodiscard6.C Thu Feb 13 11:34:05 2020 +0900 @@ -0,0 +1,11 @@ +// { dg-do compile { target c++11 } } + +struct A +{ + [[nodiscard]] A(); +}; + +void foo() +{ + A(); // { dg-warning "ignoring return value" } +}