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Subject: Re: [boost] [range] adaptors vs. rvalue to lvalue& binding
From: Eric Niebler (eric_at_[hidden])
Date: 2012-03-25 01:49:23

On 3/23/2012 8:33 AM, Thorsten Ottosen wrote:
> On 3/23/2012 4:20 PM, Dave Abrahams wrote:
>>> One possibility:
>>> - make adaptor expressions return const rvalues. The const rvalues
>>> will
>>> bind to T& arguments (where T is a template parameter) by
>>> deducing T
>>> to be const.
> I don't like this one.

For the record, Boost.Proto uses the const rvalue trick extensively. It
works well in practice, in my experience.

>>> - make even the const_iterators for such adaptors mutable
>>> (writable) iterators
>>> This accurately reflects the fact that such adaptors don't own their
>>> values.
> Seems reasonable.


Eric Niebler
BoostPro Computing

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