58 lines
1.9 KiB
Rust
58 lines
1.9 KiB
Rust
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//@ edition: 2021
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//@ run-rustfix
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//@ rustfix-only-machine-applicable
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//@ aux-build:match_ergonomics_2024_macros.rs
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#![feature(mut_preserve_binding_mode_2024, ref_pat_eat_one_layer_2024)]
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#![allow(incomplete_features, unused)]
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#![deny(rust_2024_incompatible_pat)]
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extern crate match_ergonomics_2024_macros;
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struct Foo(u8);
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fn main() {
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let &Foo(mut a) = &Foo(0);
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//~^ ERROR: the semantics of this pattern will change in edition 2024
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a = 42;
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let &mut Foo(mut a) = &mut Foo(0);
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//~^ ERROR: the semantics of this pattern will change in edition 2024
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a = 42;
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if let &&&&&Some(&_) = &&&&&Some(&0u8) {}
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//~^ ERROR: the semantics of this pattern will change in edition 2024
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if let &&&&&Some(&mut _) = &&&&&Some(&mut 0u8) {}
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//~^ ERROR: the semantics of this pattern will change in edition 2024
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if let &&&&&mut Some(&_) = &&&&&mut Some(&0u8) {}
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//~^ ERROR: the semantics of this pattern will change in edition 2024
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if let &mut Some(&mut Some(&mut Some(_))) = &mut Some(&mut Some(&mut Some(0u8))) {}
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//~^ ERROR: the semantics of this pattern will change in edition 2024
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if let &mut Some(&mut Some(&mut Some(ref mut _a))) = &mut Some(&mut Some(&mut Some(0u8))) {}
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//~^ ERROR: the semantics of this pattern will change in edition 2024
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struct Struct {
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a: u32,
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b: u32,
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c: u32,
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}
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let s = Struct { a: 0, b: 0, c: 0 };
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let &Struct { ref a, mut b, ref c } = &s;
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//~^ ERROR: the semantics of this pattern will change in edition 2024
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#[warn(rust_2024_incompatible_pat)]
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match &(Some(0), Some(0)) {
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// The two patterns are the same syntactically, but because they're defined in different
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// editions they don't mean the same thing.
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(Some(mut _x), match_ergonomics_2024_macros::mixed_edition_pat!(_y)) => {
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//~^ WARN: the semantics of this pattern will change in edition 2024
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_x = 4;
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_y = &7;
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}
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_ => {}
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}
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}
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