serialize: Use assoc types + less old_orphan_check #20514
Merged
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This commit moves the libserialize crate (and will force the hand of the
rustc-serialize crate) to not require the
old_orphan_check
feature gate aswell as using associated types wherever possible. Concretely, the following
changes were made:
Encoder
andDecoder
is now an associated type, meaningthat these traits have no type parameters.
Encoder
andDecoder
type parameters on theEncodable
andDecodable
traits have moved to the corresponding method of the trait. This movement
alleviates the dependency on
old_orphan_check
but implies thatimplementations can no longer be specialized for the type of encoder/decoder
being implemented.
Due to the trait definitions changing, this is a:
[breaking-change]