Re: [Boost-users] How to pass a member variable with boost::ref() inboost::bind()?

From: Peter Dimov (pdimov_at_[hidden])
Date: 2005-01-17 05:53:16

tom gee wrote:
> void A::FillAllLines()
> {
>    ...
>   // method 1
>    for_each(m_v.begin(), m_v.end(), boost::bind(&A::FillOneLine,
> this,_1));  // OK
>   // method 2
>    for_each(m_v.begin(), m_v.end(), boost::bind(&A::FillOneLine,
> this, ref(_1))); // error
>    ...
> }
>
> Since ONE_RECORD can be large,  I prefer to calling bind() as method
> 2, but, compiled under VC7.1 it generates such an error: [...]

_1 is always a reference to the first argument. You don't need to wrap it 
with ref().