Re: [Boost-users] [bind][lambda] overriding return value

From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2008-07-21 16:28:35

AMDG

David Rodríguez Ibeas wrote:
> Hi,
>
>    Is it possible to override/generate a return value? I want to 
> connect a signal that has a bool return value to a method that has a 
> void return type, generating always a true return.
>
> class X
> {
> public:
>    void f();
> };
> boost::signal< bool () > sgn;
>
> X x;
> sgn.connect( boost::bind( &X::f, &x ) ); // error, signal has bool 
> return, method doesn't

Using lambda, you can use the comma operator.

sgn.connect((boost::lambda::bind(&X::f, &x), true))

In Christ,
Steven Watanabe