tree 9fd06ea334273759bd8425d1ffb268be7f084d88
parent c08cf5283b80a071d19506d9a462f6c69e1797f1
author William A. Kennington III <wak@google.com> 1559257967 -0700
committer William A. Kennington III <wak@google.com> 1560534985 +0000

native_types: Fix string_wrapper overloads

We should only coalesce to an r-value reference to our internal string if our
object is a move reference. This fixes ambiguous overloads with gcc9.
This also ensures that const references cannot be ambiguous with move
references by requiring a const volatile reference.

Change-Id: I31ed529c015cc311c9933acbc0f0a4aa50fed3a6
Signed-off-by: William A. Kennington III <wak@google.com>