Warnings in unordered when compiled with "-Wshadow"

[c.matuszewski@…]

g++ 4.5.3 produces warnings in unordered when -Wshadow is used. The warnings exist 1.48.0 and in the svn trunk 75761.

This is a component specific ticket for ticket 5996 which also contains a patch.

[Daniel James]

(In [78364]) Unordered: Avoid -Wshadow warnings. Refs #6190.

[Daniel James]

(In [78432]) Unordered: Merge unordered from trunk.

• Activate std::allocator_traits for gcc 4.7 and Visual C++ 11.
• Implement variadic construct in boost::unordered::detail::allocator_traits when variadics, rvalue references and SFINAE expression are available.
• Use variadic construct from allocator_traits, or when not available move the logic for constructing value_type to a lower level, so the container code is a bit simpler.
• Avoid -Wshadow warnings. Fixes #6190.
• Implement reserve. Fixes #6857.

[y hbynn]

wvn t m ngm rbmvl