Re: [Boost-users] Signals, Format and Bind

From: Aaron Griffin (aaronmgriffin_at_[hidden])
Date: 2006-12-05 11:34:13

On 12/5/06, Memfis <memfis+news_at_[hidden]> wrote:
> I have two signals:
> signal<void(int)> source;
> signal<void(string)> target;
>
> What want is for every call:
> source(12345);
> to have a call:
> target("the value is 12345");
>
> I am trying to achieve this with format and bind, but without much luck.
>   What I came up with is the following:
> source.connect(bind(ref(target),
>      bind(&format::str,
>          bind(&format::operator%,
>              format("the value is %1"), _1)));
>
> Unfortunately the code above treats the parameter to source as if it was
> empty, i.e. I get calls
> target("the value is ");
>
> What am I doing wrong and how can this be done correctly?

Why not shirk the complexity you're creating and just use a normal function?