[Boost-bugs] [Boost C++ Libraries] #9524: assertions in range-based inner_product will change behavior

Subject: [Boost-bugs] [Boost C++ Libraries] #9524: assertions in range-based inner_product will change behavior
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-12-25 04:20:29

#9524: assertions in range-based inner_product will change behavior
------------------------------+------------------------
 Reporter:  eric_niebler      |      Owner:  neilgroves
     Type:  Bugs              |     Status:  new
Milestone:  To Be Determined  |  Component:  range
  Version:  Boost 1.54.0      |   Severity:  Problem
 Keywords:                    |
------------------------------+------------------------
 In range/numeric.hpp, in `inner_product`, I see the following assertion:

 {{{
 BOOST_ASSERT( boost::distance(rng2) >= boost::distance(rng1) );
 }}}

 A good idea in theory. But `rng2` and `rng1` can be input ranges. Simply
 computing the distance will consume the input that the algorithms needs.

 Drop the assertions.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/9524>
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