Dimitry Andric 70e0af45ae Fix unused private field warning in stdexcept after r207695.
Add a new _LIBCPP_UNUSED define in __config, which can be used to
indicate explicitly unused items, and apply it to the __imp__ field of
__libcpp_refstring.

Somebody who knows about Microsoft C++ and IBM C++ should fill in the
unused attribute syntax appropriate for those compilers, if there is
any.

Differential Revision: http://reviews.llvm.org/D6836


git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@228281 91177308-0d34-0410-b5e6-96231b3b80d8
2015-02-05 07:40:48 +00:00
2015-01-16 02:27:17 +00:00
2015-01-30 22:40:31 +00:00
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