[libcxx-commits] [libcxx] [libc++] Deprecate non-standard std::launch::any extension (PR #173397)

[A. Jiang via libcxx-commits]

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@@ -19,4 +19,5 @@
 void test() {
   std::async([]() {});                   // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
   std::async(std::launch::any, []() {}); // expected-warning {{ignoring return value of function declared with 'nodiscard' attribute}}
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frederick-vs-ja wrote:

I think we shouldn't use `launch::any` here, and should use standard enumerators instead.

https://github.com/llvm/llvm-project/pull/173397