[webkit-dev] Why does our std::optional lack the has_value() function?

[JF Bastien]

Ours was imported from: https://github.com/akrzemi1/Optional <https://github.com/akrzemi1/Optional>
at: 727c729dd1d9f06f225868280e50154594d7e59d

And it was subsequently added in: https://github.com/akrzemi1/Optional/commit/8993daae3e9ed90be98ffb2517315f43fe9f09e4#diff-b7e55535b5ac355f0d683d30b3c87f86 <https://github.com/akrzemi1/Optional/commit/8993daae3e9ed90be98ffb2517315f43fe9f09e4#diff-b7e55535b5ac355f0d683d30b3c87f86>



> On Jun 19, 2017, at 21:45, Darin Adler <darin at apple.com> wrote:
> 
> I noticed we don’t have has_value() in our version of std::optional. Does anyone know why?
> 
> — Darin
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