[libcxx-commits] [PATCH] D63574: Implement P0340R3: Make `underlying_type` SFINAE-friendly

[Marshall Clow via Phabricator via libcxx-commits]

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Note: There is no feature test macro for this.



================
Comment at: libcxx/test/std/utilities/meta/meta.trans/meta.trans.other/underlying_type.fail.cpp:19
+
+enum E1 { zero, one, two = sizeof(std::underlying_type<E1>::type) };
+
----------------
I can add an `expected-error {{cannot determine underlying type of incomplete enumeration type 'E1'}}` here if people want.



Repository:
  rCXX libc++

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  https://reviews.llvm.org/D63574/new/

https://reviews.llvm.org/D63574