Matthias Krüger a7c07cf731 Rollup merge of #108548 - jamen:master, r=compiler-errors ... Clarify the 'use a constant in a pattern' error message ```rs use std::borrow::Cow; const ERROR_CODE: Cow<'_, str> = Cow::Borrowed("23505"); fn main() { let x = Cow::from("23505"); match x { ERROR_CODE => {} } } ``` ``` error: to use a constant of type `Cow` in a pattern, `Cow` must be annotated with `#[derive(PartialEq, Eq)]` --> src/main.rs:9:9 | 9 | ERROR_CODE => {} | ^^^^^^^^^^ error: could not compile `playground` due to previous error ``` It seems helpful to link to StructuralEq in this message. I was a little confused, because `Cow<'_, str>` implements PartialEq and Eq, but they're not derived, which I learned is necessary for structural equality and using constants in patterns (thanks to the Rust community Discord server) For tests, should I update every occurrence of this message? I see tests where this is still a warning and I'm not sure if I should update those.		2023-03-28 07:01:08 +02:00
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src	Rollup merge of #108548 - jamen:master, r=compiler-errors	2023-03-28 07:01:08 +02:00
Cargo.toml	remove unused imports	2023-02-06 17:40:18 +03:00
messages.ftl	Add notes to non-structural const in pattern error message	2023-03-27 11:08:11 -04:00