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Re: [std-proposals] Function Pointer from Lambda with Captures

From: Zhihao Yuan <zy_at_[hidden]>
Date: Fri, 14 Apr 2023 19:22:28 +0000
On Friday, April 14th, 2023 at 6:18 AM, Frederick Virchanza Gotham via Std-Proposals <std-proposals_at_[hidden]> wrote:

> void Some_Library_Func(void (*const pf)(void))
> {
> pf();
> }

> [...]
> We will define a simple POD struct to hold these two pieces of data:

> struct LambdaInfo {
> void *data, code;
> };

I see C callback APIs that split a context pointer
to an extra parameter very often:

    void some_api(void cb(int), void *user_data);

And there is a paper trying to simplify that:

    void some_api(void cb(int) _Wide);


I'm not sure whether it is worth the effort to
please the old APIs that don't support context by
pushing the solution to the next level.

Zhihao Yuan, ID lichray
The best way to predict the future is to invent it.

Received on 2023-04-14 19:22:33