[boost] Re: Formal Review: FOREACH macro

From: David Abrahams (dave_at_[hidden])
Date: 2005-05-02 15:53:54

"Gennadiy Rozental" <gennadiy.rozental_at_[hidden]> writes:

>> This is very powerful.
>
> And dangerous. Cause allows developer to "forget" about an extra
> copy.

I'm not sure where you think the "extra" copy is.  The copy is already
implicit in the RHS expression, isn't it?

In general C++ will make lots of copies you can't control.  Extra
copies are hardly "dangerous" (except maybe with auto_ptr).  They may
be inefficient, but then I don't believe in trying to prevent people
from writing inefficient code, especially when that's more convenient.
Very little of the code end users write actually needs to be fast.

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com