[webkit-dev] Watch out for std::optional's move constructor

[Fujii Hironori]

On Tue, Dec 18, 2018 at 11:16 AM Maciej Stachowiak <mjs at apple.com> wrote:

>
>  Among other things, this allows for a “did anything actually get left
> here” check after the function that may or may not move a value. Seems like
> an upgrade.
>
>
Don't recommend such checks. It is simply use-after-move. The expression
WTFMove(x) means marking x as disposable.

On Tue, Dec 18, 2018 at 8:55 AM Alex Christensen <achristensen at apple.com>
wrote:

>  I think we should do something to track and prevent the use of moved-from
> values instead of introducing our own std::optional replacement.
>

Do you have a idea?
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