/home/animuspexus/dlang/d_v2.098.0/dmd/generated/linux/release/64/../../../../../phobos/std/parallelism.d(436): Error: need this for threadFunc of type void()
./t.d(22): Error: template instance std.parallelism.Task!(threadFunc) error instantiating

thou documentation says a function (or delegate or other callable)

import std.stdio;
import std.parallelism;


class TC {
	
	void threadFunc()
	{
		import core.thread;
		import core.time;
		
		scope(exit) writeln("threadFunc done");
		
		core.thread.osthread.Thread.getThis.sleep(msecs(2000));
		
	}
	
	void threadCreator()
	{
		scope(exit) writeln("threadCreator done");
		auto t1 = Task!threadFunc;
		t1.executeInNewThread();
		
	}
	
}


void main()
{
	scope(exit) writeln("main done");
	
	auto tc = new TC;
	tc.threadCreator();
	
}

On Sunday, 14 November 2021 at 12:01:36 UTC, Alexey wrote:

  auto t1 = Task!threadFunc;

if this line rewritten as auto t1 = Task!(TC.threadFunc, this);

/home/animuspexus/dlang/d_v2.098.0/dmd/generated/linux/release/64/../../../../../phobos/std/parallelism.d(451): Error: tuple `Args` is used as a type
/home/animuspexus/dlang/d_v2.098.0/dmd/generated/linux/release/64/../../../../../phobos/std/parallelism.d(533): Error: tuple `Args` is used as a type
/home/animuspexus/dlang/d_v2.098.0/dmd/generated/linux/release/64/../../../../../druntime/import/core/internal/traits.d(191): Error: template instance `pred!(this)` does not match template declaration `isAssignable(Lhs, Rhs = Lhs)`
/home/animuspexus/dlang/d_v2.098.0/dmd/generated/linux/release/64/../../../../../phobos/std/meta.d(842): Error: template instance `t.TC.threadCreator.allSat!(isAssignable, this)` error instantiating
/home/animuspexus/dlang/d_v2.098.0/dmd/generated/linux/release/64/../../../../../phobos/std/parallelism.d(541):        instantiated from here: `allSatisfy!(isAssignable, this)`
./t.d(22):        instantiated from here: `Task!(threadFunc, this)`

On Sunday, 14 November 2021 at 12:01:36 UTC, Alexey wrote:

Go example for contrast. Ideally, I'd like something similar;

package main

import (
	"fmt"
	"time"
)

type TC struct {
}

func (self *TC) threadFunc() {
	defer fmt.Println("threadFunc done")
	time.Sleep(time.Duration(time.Second * 2))
}

func (self *TC) threadCreator() {
	defer fmt.Println("threadCreator done")
	go self.threadFunc()
}

func main() {
	defer fmt.Println("main done")
	tc := new(TC)
	tc.threadCreator()
}

On Sunday, 14 November 2021 at 12:01:36 UTC, Alexey wrote:

You just need two changes:

• make threadFunc function static: static void threadFunc()
• use task instead of Task: auto t1 = task!threadFunc;

On Sunday, 14 November 2021 at 14:24:00 UTC, Andrey Zherikov wrote:

I need this to be available inside of threadFunc

On Sunday, 14 November 2021 at 14:41:21 UTC, Alexey wrote:

Just do auto t1 = task(&threadFunc) in threadCreator then.

On Sunday, 14 November 2021 at 16:40:58 UTC, Andrey Zherikov wrote:

Error: value of this is not known at compile time

import std.stdio;
import std.parallelism;

class TC
{
    void threadFunc()
    {
        import core.thread;
        import core.time;

        scope (exit)
            writeln("threadFunc done");

        core.thread.osthread.Thread.getThis.sleep(msecs(2000));
    }

    void threadCreator()
    {
        scope (exit)
            writeln("threadCreator done");

        auto t1 = task!(&threadFunc);
        t1.executeInNewThread();
    }
}

void main()
{
    scope (exit)
        writeln("main done");

    auto tc = new TC;
    tc.threadCreator();
}

On Sunday, 14 November 2021 at 16:55:24 UTC, Alexey wrote:

import std.stdio;
import std.parallelism;

class TC
{
    void threadFunc()
    {
        import core.thread;
        import core.time;

        scope (exit)
            writeln("threadFunc done");

        core.thread.osthread.Thread.getThis.sleep(msecs(2000));
    }

    void threadCreator()
    {
        scope (exit)
            writeln("threadCreator done");

        auto t1 = task!(&threadFunc);
        t1.executeInNewThread();
    }
}

void main()
{
    scope (exit)
        writeln("main done");

    auto tc = new TC;
    tc.threadCreator();
}

Try task(&threadFunc) instead of task!(&threadFunc)

On Sunday, 14 November 2021 at 16:55:24 UTC, Alexey wrote:

Remove "!"

On Sunday, 14 November 2021 at 17:42:18 UTC, Imperatorn wrote:

worked! huge thanks!