Re: [Boost-bugs] [Boost C++ Libraries] #1404: Unordered Fusion Map constructors.

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #1404: Unordered Fusion Map constructors.
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2009-05-28 17:48:35

#1404: Unordered Fusion Map constructors.
  Reporter: Dean Michael Berris <mikhailberis_at_[hidden]> | Owner: djowel
      Type: Feature Requests | Status: new
 Milestone: To Be Determined | Component: fusion
   Version: Boost Development Trunk | Severity: Cosmetic
Resolution: | Keywords:

Comment(by srajko):

 [Bug Sprint] One way I see of implementing this would be through a view
 which reorders the elements of a source map to match the order of keys of
 a target map. This view could then be used for construction and
 assignment from an existing map:


 my_map_type instance (
   reorder_map_to<my_map_type> (
     make_map( make_pair<tags::type_2>(2), make_pair<tags::type_1>(1) ) )

 instance =
   reorder_map_to<my_map_type> (
     make_map( make_pair<tags::type_2>(2), make_pair<tags::type_1>(1) ) )

 // or

 my_map_type instance ( reorder_map_to<my_map_type> (some_other_map) );

 instance = reorder_map_to<my_map_type> (some_other_map);


 The map class could use the reordering view automatically in construction
 from a list of arguments, construction from a Sequence, and assignment (so
 that the OP's original code snippet compiles), but that would complicate
 the otherwise simple implementation. Would using the reordering view
 manually fulfill the need here?

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