[PATCH] PR libstdc++/85951 for make_signed/make_unsigned for character types

[Jonathan Wakely]

On 31/05/18 13:17 +0100, Jonathan Wakely wrote:
>Because the wide character types are neither signed integer types nor
>unsigned integer types they need to be transformed to an integral type
>of the correct size and the lowest rank (which is not necessarily the
>underlying type). Reuse the helpers for enumeration types to select the
>correct integer.
>
>The refactoring of __make_unsigned_selector and __make_signed_selector
>slightly reduces the number of template instantiations and so reduces
>memory usage.

A follow-up patch to fix some comment typos, committed to trunk.



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