https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81950
Daniel Krügler <daniel.kruegler at googlemail dot com> changed:
What |Removed |Added
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CC| |daniel.kruegler@googlemail.
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--- Comment #3 from Daniel Krügler <daniel.kruegler at googlemail dot com> ---
(In reply to Judy Ward from comment #1)
> In the comment above I meant to say the line should be changed to:
>
> _GLIBCXX17_INLINE constexpr in_place_t in_place{};
TC's guess is correct. The omission is intentionally, because the macro is
designed to be used in contexts which are unaware of the actual C++ version and
in_place_t was introduced with C++17, see
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2016/p0504r0.html and some
papers related to std::optional in-place construction. The surrounding #ifdef
block of the variable definition you are complaining about is only available
since C++17.
