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There are many!
It's imported and can be used directly within this file, and already is in a few places.
A few can be done with the `impl_erasable_for_single_lifetime_types!` macro instead of being hand-written.
Using '_ removes unnecessary differences between the impl type and the associated `Storage` type.
Now that 'static lifetimes aren't used, a lot of the hand-written `Erasable` impls can now be done with the macro. (The only ones that can't are those with a generic type parameter, because `size_of` doesn't work in that case.) Also, `impl_erasable_for_single_lifetime_types!` isn't needed at all.
Some of the hand-written `Erasable` impls only match a single type in practice. It's easier to just list the concrete types in `impl_erasable_for_types_with_no_type_params!`.
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I'm surprised that replacing (My intuition is that type contexts tend to be very picky about anonymous lifetimes, but I guess that's less true of const-in-type contexts.) |
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@bors r+ |
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This PR removes many unused
Erasableimpls, converts many of the hand-written impls to macro-generated impls, and sorts the macro's inputs. This cuts over 200 lines of code and fixes three FIXME comments.r? @petrochenkov