Re: Whitch can replace std::bind/boost::bind ?

[Ali Çehreli via Digitalmars-d-learn]

On 03/18/2016 03:50 AM, Dsby wrote:

foreach (i ; 0..4) {
     auto th = new Thread(delegate(){listRun(i);});//this is erro
     _thread[i]= th;
     th.start();
}

void listRun(int i)
{
      writeln("i = ", i); // the value is not(0,1,2,3), it all is 2.
}


I want to know how to use it like std::bind.

A workaround is an intermediate function that returns the delegate:

import std.stdio;
import core.thread;

void listRun(int i)
{
     writeln("i = ", i); // the value is not(0,1,2,3), it all is 2.
}

auto makeClosure(int i) {
    return delegate(){listRun(i);};
}

void main() {
    Thread[4] _thread;

    foreach (i ; 0..4) {
        auto th = new Thread(makeClosure(i));
        _thread[i]= th;
        th.start();
    }
}

Prints different values:

i = 1
i = 0
i = 2
i = 3

Ali