41 lines
1.2 KiB
Rust
41 lines
1.2 KiB
Rust
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// This tests the parser recovery in `recover_intersection_pat`
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// and serves as a regression test for the diagnostics issue #65400.
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//
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// The general idea is that for `$pat_lhs @ $pat_rhs` where
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// `$pat_lhs` is not generated by `ref? mut? $ident` we want
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// to suggest either switching the order or note that intersection
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// patterns are not allowed.
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fn main() {
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let s: Option<u8> = None;
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match s {
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Some(x) @ y => {}
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//~^ ERROR pattern on wrong side of `@`
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//~| pattern on the left, should be to the right
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//~| binding on the right, should be to the left
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//~| HELP switch the order
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//~| SUGGESTION y@Some(x)
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_ => {}
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}
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match s {
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Some(x) @ Some(y) => {}
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//~^ ERROR left-hand side of `@` must be a binding pattern
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//~| interpreted as a pattern, not a binding
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//~| also a pattern
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//~| NOTE bindings are `x`, `mut x`, `ref x`, and `ref mut x`
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_ => {}
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}
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match 2 {
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1 ..= 5 @ e => {}
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//~^ ERROR pattern on wrong side of `@`
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//~| pattern on the left, should be to the right
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//~| binding on the right, should be to the left
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//~| HELP switch the order
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//~| SUGGESTION e@1 ..=5
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_ => {}
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}
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}
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