Add missing [[nodiscard]] test

JMazurkiewicz · JMazurkiewicz · commit bdfe173e190a · 2024-12-05T21:16:53.000+01:00
Comment: #86133 (comment)
diff --git a/libcxx/test/libcxx/utilities/function.objects/func.not.fn/not_fn.nttp.nodiscard.verify.cpp b/libcxx/test/libcxx/utilities/function.objects/func.not.fn/not_fn.nttp.nodiscard.verify.cpp
@@ -18,4 +18,7 @@
 void test() {
   using F = std::true_type;
   std::not_fn<F{}>(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
+
+  auto negated = std::not_fn<F{}>();
+  negated(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
 }

Original file line number	Diff line number	Diff line change
`@@ -18,4 +18,7 @@`
`18`	`18`	`void test() {`
`19`	`19`	`using F = std::true_type;`
`20`	`20`	`std::not_fn<F{}>(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}`
	`21`	`+`
	`22`	`+ auto negated = std::not_fn<F{}>();`
	`23`	`+ negated(); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}`
`21`	`24`	`}`