Re: std.signal woes :/

[cal]

On Saturday, 23 February 2013 at 17:01:48 UTC, Damian wrote:

Ok signals work fine, until I use them in a descendant class.

Snippet:
-----------------
import std.signals;

class ClassA
{
        public mixin Signal!(int) addNumber1;
}

class ClassB : ClassA
{
        public mixin Signal!(int) addNumber2;
}

Error:

\dmd2\src\phobos\std\signals.d(0,0): Error: function main.ClassB.Signal!(int).emit cannot override final function main.ClassA.Signal!(int).emit (moooo)

Is this expected behavior or a bug in my code?

I think this is a known issue. Here is a workaround I've used:


import std.signals;

struct MySignal(T)
{
    mixin Signal!T _signal;
    alias _signal this;
}

class ClassA
{
    MySignal!int addNumber1;
}

class ClassB : ClassA
{
    MySignal!int addNumber2;
}

void main()
{
    auto a = new ClassA;
    auto b = new ClassB;
    a.addNumber1.emit(1);
    b.addNumber1.emit(1);
    b.addNumber2.emit(1);
}