import std;
import core.thread;

auto threading(lazy void fun){ return task!fun().executeInNewThread(); }

void main(){
	threading(writeln("Hello World!"));
}


I want to create a function threading() to run some function in other threading, but I get this error bellow. How can I get success?


Error: static function Programa.threading.Task!(fun).Task.impl cannot access frame of function Programa.threading
Error: template instance `Programa.threading.Task!(fun)` error instantiating

On Friday, 27 December 2019 at 06:08:16 UTC, Marcone wrote:
> import std;
> import core.thread;
>
> auto threading(lazy void fun){ return task!fun().executeInNewThread(); }
>
> void main(){
> 	threading(writeln("Hello World!"));
> }
>
>
> I want to create a function threading() to run some function in other threading, but I get this error bellow. How can I get success?
>
>
> Error: static function Programa.threading.Task!(fun).Task.impl cannot access frame of function Programa.threading
> Error: template instance `Programa.threading.Task!(fun)` error instantiating

This works:

import std;
import core.thread;

auto threading(void function() fun){ return task(fun).executeInNewThread(); }

void main(){
    writeln("Main: ", thisTid);
	threading({ writeln("Hello, ", thisTid); });
}

On Friday, 27 December 2019 at 07:06:52 UTC, mipri wrote:
> On Friday, 27 December 2019 at 06:08:16 UTC, Marcone wrote:
>> import std;
>> import core.thread;
>>
>> auto threading(lazy void fun){ return task!fun().executeInNewThread(); }
>>
>> void main(){
>> 	threading(writeln("Hello World!"));
>> }
>>
>>
>> I want to create a function threading() to run some function in other threading, but I get this error bellow. How can I get success?
>>
>>
>> Error: static function Programa.threading.Task!(fun).Task.impl cannot access frame of function Programa.threading
>> Error: template instance `Programa.threading.Task!(fun)` error instantiating
>
> This works:
>
> import std;
> import core.thread;
>
> auto threading(void function() fun){ return task(fun).executeInNewThread(); }
>
> void main(){
>     writeln("Main: ", thisTid);
> 	threading({ writeln("Hello, ", thisTid); });
> }

Very Good! Thank you:

import std;
import core.thread;

alias threading = compose!(fun => fun.executeInNewThread(), fun => task(fun));

void main(){
	threading({writeln("Ola Mundo!");});
}

On Friday, 27 December 2019 at 07:06:52 UTC, mipri wrote:
> On Friday, 27 December 2019 at 06:08:16 UTC, Marcone wrote:
>> import std;
>> import core.thread;
>>
>> auto threading(lazy void fun){ return task!fun().executeInNewThread(); }
>>
>> void main(){
>> 	threading(writeln("Hello World!"));
>> }
>>
>>
>> I want to create a function threading() to run some function in other threading, but I get this error bellow. How can I get success?
>>
>>
>> Error: static function Programa.threading.Task!(fun).Task.impl cannot access frame of function Programa.threading
>> Error: template instance `Programa.threading.Task!(fun)` error instantiating
>
> This works:
>
> import std;
> import core.thread;
>
> auto threading(void function() fun){ return task(fun).executeInNewThread(); }
>
> void main(){
>     writeln("Main: ", thisTid);
> 	threading({ writeln("Hello, ", thisTid); });
> }

or you can use just https://dlang.org/library/std/concurrency/spawn.html from std.concurrency to avoid needless bike construction.

Best regards,
Alexandru.