Re: [Boost-users] [bimap] Creating a bimap fom a std::map

On Wed, Nov 25, 2009 at 5:35 PM, Edward Diener wrote:

Whether I go:

bm.left.insert( m.begin(), m.end() );

or

bm.right.insert( m.begin(), m.end() );

,when both types are the same, is totally irrelevant to further use of the bimap. Is this not correct ?

No, it is not correct. A bimap is a mapping between two sets of elements (named the left set, and the right set) that can be viewed as a std map or as a std map. In this particular example both sets hold elements of the same type but which one is the left and which one is the right matters. Imagine that you need a mapping between names and surnames (bimap,tagged >), and you want to insert from a std::map that maps from surnames to names. I hope it is more clear now. Regards Matias