Re: [Boost-bugs] [Boost C++ Libraries] #5375: is_container itself should be MPL boolean instead of type typedef.

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #5375: is_container itself should be MPL boolean instead of type typedef.
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2011-03-27 02:51:00


#5375: is_container itself should be MPL boolean instead of type typedef.
----------------------------------------------------+-----------------------
  Reporter: Yasutaka ATARASHI <atara-y@…> | Owner: hkaiser
      Type: Bugs | Status: new
 Milestone: To Be Determined | Component: spirit
   Version: Boost 1.46.0 | Severity: Problem
Resolution: | Keywords:
----------------------------------------------------+-----------------------

Comment (by anonymous):

 Replying to [comment:2 hkaiser]:
> Sorry I do not understand your problem.
 `boost::spirit::traits::is_container<>` is derived from `mpl::bool_<>`
 (see $BOOST_ROOT/boost/spirit/home/support/contain.hpp). What's wrong with
 that?

 Sorry for unclarity. Implementation has no problem. The problem point is
 documentation.
 is_container is provided for customization point. A reader who wants to
 provide is_container can misunderstand providing `type' is enough,
 according to the current documentation because "Expression Semantics" only
 mentions `type'.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/5375#comment:3>
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