- replaces "move-only" terminology with "noncopyable"
- replaces compiler jargon like "guaranteed parameters"
and "lvalue" with corresponding language-level notions
- simplifies diagnostics about closures.
and probably more.
rdar://109281444
We parse `~Copyable` in an inheritance clause of enum and
struct decls as a synonym for the `@_moveOnly` attribute
being added to that decl. This completely side-steps the
additional infrastructure for generalized suppressed
conformances in favor of a minimal solution. One benefit of
this minimal solution is that it doesn't risk introducing
any back-compat issues with older compilers or stdlibs.
The trade-off is that we're more committed to supporting
`@_moveOnly` in compiled modules in the future. In fact,
this change does not deprecate `@_moveOnly` in any way.
resolves rdar://106775103
