Aaron Griffin wrote:

On 12/5/06, Memfis wrote:

...

I have two signals: signal source; signal 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?

Because I have several signals that I want to translate between in such a manner, and avoiding creating lots of one-line functions is what bind was created for, I think. A besides, this is a simplified example. -- Memfis

Peter Dimov wrote:

...

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)));

Your format string throws an exception for me. Perhaps you need to use %1%?

Argh. I made a typo while editing the post. I use %1% of course. But it still doesn't work. -- Memfis