[/============================================================================
  Boost.Geometry (aka GGL, Generic Geometry Library)

  Copyright (c) 2009-2012 Barend Gehrels, Amsterdam, the Netherlands.

  Use, modification and distribution is subject to the Boost Software License,
  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
  http://www.boost.org/LICENSE_1_0.txt)
=============================================================================/]

[note The specified tag list is handled in the specified order: as soon as a tag
   inheriting the specified tag is found, it is defined as the metafunction 
   typedef [*type].
]  

[note If none of the specified possible base tags is a base class of the 
    specified tag, the tag itself is defined as the [*type] result of the 
    metafunction.
]  
[heading Complexity]
Compile time

[heading Example]
[tag_cast]
[tag_cast_output]