Errors - Re: Signals and Slots

[Dave]

Jarrett Billingsley wrote:
> "Walter Bright" <newshound at digitalmars.com> wrote in message 
> news:eidh0g$10e1$1 at digitaldaemon.com...
> 
>>> public import std.stdio;
>>> public import std.c.stdlib;
>>> public import std.outofmemory;
> 
> That then works when the class has one signal, but trying to put more than 
> one:
> 
> class Input
> {
>     mixin Signal!(int, int) click;
>     mixin Signal!(char) keyDown;
> }
> 

Good catch - this also happens w/o the 'public import' mod. in std/signals (if you import those into 
your module) as well.

This is probably a show-stopper, because I don't think this would compete with the current QT 
signal/slot mechanism, for example, if we have to wrap each Signal with a separate class.

Walter - is there a work-around for this problem, or a 'fix' of some sort planned?

I mean this is very, very cool... QT only recently bowed to market demand for a port to Java (their 
website used to complain of Java performance issues), and the MOC hack has always been a problem for 
C++ (IMHO). D is a natural for QT if this can be fixed. I think if it can be fixed, you should 
approach them with it. It would be huge for D (and potentially for QT as well).

Thanks for these awesome new features!

> Gives..
> 
> C:\dmd\bin\..\src\phobos\std\signals.d(181): Error: 
> dtest.Input.Signal!(int,int).unhook at dtest.d(206) conflicts with 
> dtest.Input.Signal!(char).unhook at dtest.d(206)
> C:\dmd\bin\..\src\phobos\std\signals.d(196): Error: 
> dtest.Input.Signal!(int,int).unhook at dtest.d(206) conflicts with 
> dtest.Input.Signal!(char).unhook at dtest.d(206)
> C:\dmd\bin\..\src\phobos\std\signals.d(232): Error: 
> dtest.Input.Signal!(int,int).unhook at dtest.d(206) conflicts with 
> dtest.Input.Signal!(char).unhook at dtest.d(206)
> C:\dmd\bin\..\src\phobos\std\signals.d(181): Error: 
> dtest.Input.Signal!(int,int).unhook at dtest.d(206) conflicts with 
> dtest.Input.Signal!(char).unhook at dtest.d(206)
> C:\dmd\bin\..\src\phobos\std\signals.d(196): Error: 
> dtest.Input.Signal!(int,int).unhook at dtest.d(206) conflicts with 
> dtest.Input.Signal!(char).unhook at dtest.d(206)
> C:\dmd\bin\..\src\phobos\std\signals.d(232): Error: 
> dtest.Input.Signal!(int,int).unhook at dtest.d(206) conflicts with 
> dtest.Input.Signal!(char).unhook at dtest.d(206)
>> Execution finished.
> 
> :S
> 
> Mixins, mixins, mixins. 
> 
>