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Add help for matches for if let in arm guard

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This commit is contained in:
Esteban Küber 2021-03-07 14:44:21 -08:00
parent 23bcea4249
commit 63fb294a74
2 changed files with 7 additions and 1 deletions
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6
compiler/rustc_ast_passes/src/feature_gate.rs
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@ -638,7 +638,11 @@ pub fn check_crate(krate: &ast::Crate, sess: &Session) {
}
};
}
gate_all!(if_let_guard, "`if let` guards are experimental");
gate_all!(
if_let_guard,
"`if let` guards are experimental",
"you can write `if matches!(<expr>, <pattern>)` instead of `if let <pattern> = <expr>`"
);
gate_all!(
let_chains,
"`let` expressions in this position are experimental",