Re: Placement of shared does not allow to set a delegate

[Tolga Cakiroglu via Digitalmars-d-learn]

On Monday, 16 June 2014 at 15:25:51 UTC, Ali Çehreli wrote:

Here is a minimal example that reproduces the issue and the 
hint that compiles the code:

class SocketListener
{
    public void delegate( shared(SocketListener) sender )
    /* shared */    // <-- UNCOMMENT TO COMPILE
    eventWhenStarted;
}

class C
{
    this()
    {
        auto listener = new shared SocketListener();
        listener.eventWhenStarted = &listener_whenStarted;
    }

    public void listener_whenStarted( shared(SocketListener) 
sender ) shared
    {}
}

void main()
{}

Error: cannot implicitly convert expression 
(&this.listener_whenStarted) of type void 
delegate(shared(SocketListener) sender) shared to shared(void 
delegate(shared(SocketListener)))

Ali


Okay, now I continue with another thing. After defining the event 
attribute as follows

public void delegate( shared(SocketListener) sender ) shared 
eventWhenStarted;


---


I removed the "shared" keyword from that method

public void listener_whenStarted( shared(SocketListener) sender 
){}


---


Then set the attribute as follows

listener.eventWhenStarted = cast(shared)(&listener_whenStarted);


---


There is error again.

main.d(21): Error: cannot implicitly convert expression 
(&this.listener_whenStarted) of type shared(void 
delegate(shared(SocketListener))) to shared(void 
delegate(shared(SocketListener)))

---

This error is important, because both types are completely same:

main.d(21): Error: cannot implicitly convert expression 
(&this.listener_whenStarted) of type

shared(void delegate(shared(SocketListener)))
to
shared(void delegate(shared(SocketListener)))

---

Can this be a bug?