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[REQUEST]: Allow callback() template to work also with non-void and non-bool return types. [message #48764]

Tue, 12 September 2017 00:49

Oblivion
Messages: 1264
Registered: August 2007

Senior Contributor

Hello,

It seems that callback() template function isn't working with return types other than bool or void.
Is this intentional? Or is it possible to replace it with a more flexible one?

If so, maybe the below template function can do the job (IF I am not missing something here).

template<typename Res, typename... ArgTypes>
Function<Res(ArgTypes...)> callback(Res (*fn)(ArgTypes...))
{
	return [=](ArgTypes... args) { return (*fn)(args...); };
}

Best regards,
Oblivion

Github page: https://github.com/ismail-yilmaz
Bobcat the terminal emulator: https://github.com/ismail-yilmaz/Bobcat

[Updated on: Tue, 12 September 2017 01:01]

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Re: [REQUEST]: Allow callback() template to work also with non-void and non-bool return types. [message #48775 is a reply to message #48764]

Wed, 13 September 2017 19:15

mirek
Messages: 14290
Registered: November 2005

Ultimate Member

Oblivion wrote on Tue, 12 September 2017 00:49

Hello,

It seems that callback() template function isn't working with return types other than bool or void.
Is this intentional? Or is it possible to replace it with a more flexible one?

If so, maybe the below template function can do the job (IF I am not missing something here).
template<typename Res, typename... ArgTypes>
Function<Res(ArgTypes...)> callback(Res (*fn)(ArgTypes...))
{
	return [=](ArgTypes... args) { return (*fn)(args...); };
}
Best regards,
Oblivion

Callback is deprecated. Use Function.

[Updated on: Wed, 13 September 2017 19:15]

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