Byte copy speedup #4674
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Byte copy speedup #4674
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…ules. "Dual impls" are impls that are both type implementations and trait implementations. They can lead to ambiguity and so this patch removes them from the language. This also enforces coherence rules. Without this patch, records can implement traits not defined in the current crate. This patch fixes this, and updates all of rustc to adhere to the new enforcement. Most of this patch is fixing rustc to obey the coherence rules, which involves converting a bunch of records to structs.
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r+ to 2195f75 |
flip1995
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Apr 22, 2021
Improve `map_entry` suggestion fixes: rust-lang#5176 fixes: rust-lang#4674 fixes: rust-lang#4664 fixes: rust-lang#1450 Still need to handle the value returned by `insert` correctly. changelog: Improve `map_entry` suggestion. Will now suggest `or_insert`, `insert_with` or `match _.entry(_)` as appopriate. changelog: Fix `map_entry` false positives where the entry api can't be used. e.g. when the map is used for multiple things.
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r? @nikomatsakis