[webkit-dev] Should we ever use std::function instead of WTF::Function?

Chris Dumez cdumez at apple.com
Tue Jun 13 09:26:25 PDT 2017

The only advantage of std::function that I know of is that it is copyable. Unless you really need to copy your lambda for a reason or another, I don’t see a good reason to ever use std::function instead of WTF::Function.

I have been slowly replacing std::function by WTF::Function in the code base but there are still a lot of uses of std::function.

 Chris Dumez

> On Jun 13, 2017, at 9:24 AM, Darin Adler <darin at apple.com> wrote:
> I’ve noticed many patches switching us from std::function to WTF::Function recently, to fix problems with copying and thread safety.
> Does std::function have any advantages over WTF::Function? Should we ever prefer std::function, or should we use WTF::Function everywhere in WebKit where we would otherwise use std::function?
> — Darin
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