Re: [Boost-users] bind, and member function with a parameter

Arkadiy Vertleyb wrote:

"Peter Dimov" wrote

...

In 1.33, you can't use boost::bind with Lambda's placeholders. Either use Bind's ::_1 placeholder, or use boost::lambda::bind.

In 1.35, the code will work even with Lambda's placeholder.

Is 1.35 correct or did you mean 1.34?

1.35 is correct. 1.34 has been closed for new features for quite a while.

Just an idea -- is it possible to have one universal set of placeholders in boost? Bind, Lambda, MPL, and possibly other libraries could then use some sort of redirection to their specialized placeholders... Might help to avoid some confusion.

This isn't possible in general, but in 1.35 boost::bind implements the TR1 is_placeholder extension mechanism that allows anybody to define their own placeholders. I've already made Lambda's placeholders compatible with boost::bind. Bind's placeholders can't be made compatible with Lambda, since the latter places more requirements on its placeholders; they are fully-featured lambda expressions.