tree 6b5f97b4474113d10efcf09c7c56b75aa957d755
parent 5a3d4840019a62c615e949cf28f2c610c2a88387
author Nathan Sidwell <nathan@acm.org> 1646072294 -0800
committer Copybara-Service <copybara-worker@google.com> 1649276748 -0700

[demangler][NFC] Rename SwapAndRestore to ScopedOverride

The demangler has a utility class 'SwapAndRestore'. That name is
confusing. It's not swapping anything, and the restore part happens at
the object's destruction. What it's actually doing is allowing a
override of some value that is dynamically accessible within the
lifetime of a lexical scope. Thus rename it to ScopedOverride, and
tweak it's member variable names.

Reviewed By: dblaikie

Differential Revision: https://reviews.llvm.org/D122606

GitOrigin-RevId: 51f6caf2fbb5118569f2de33a85ffcc52568e0a7