48 lines
2.0 KiB
Rust
48 lines
2.0 KiB
Rust
//@ revisions: stable2021 classic2021 structural2021 classic2024 structural2024
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//@[stable2021] edition: 2021
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//@[classic2021] edition: 2021
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//@[structural2021] edition: 2021
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//@[classic2024] edition: 2024
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//@[structural2024] edition: 2024
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//@[classic2024] run-rustfix
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//@[structural2024] run-rustfix
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//! Tests for `&` patterns matched against `&mut` reference types where the inner pattern attempts
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//! to bind by mutable reference.
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#![allow(incomplete_features)]
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#![cfg_attr(any(classic2021, classic2024), feature(ref_pat_eat_one_layer_2024))]
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#![cfg_attr(any(structural2021, structural2024), feature(ref_pat_eat_one_layer_2024_structural))]
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pub fn main() {
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if let Some(&Some(ref mut x)) = &mut Some(Some(0)) {
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//[stable2021]~^ ERROR: mismatched types
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//[classic2021,structural2021,classic2024,structural2024]~^^ ERROR: cannot borrow as mutable inside an `&` pattern
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let _: &mut u8 = x;
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}
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if let &Some(Some(ref mut x)) = &mut Some(Some(0)) {
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//[stable2021]~^ ERROR: mismatched types
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//[classic2021,structural2021,classic2024,structural2024]~^^ ERROR: cannot borrow as mutable inside an `&` pattern
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let _: &mut u8 = x;
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}
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macro_rules! pat {
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($var:ident) => { ref mut $var };
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}
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let &pat!(x) = &mut 0;
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//[stable2021]~^ ERROR: mismatched types
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//[classic2021,structural2021,classic2024,structural2024]~^^ ERROR: cannot borrow as mutable inside an `&` pattern
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let _: &mut u8 = x;
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let &(ref mut a, ref mut b) = &mut (true, false);
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//[stable2021]~^ ERROR: mismatched types
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//[classic2021,structural2021,classic2024,structural2024]~^^ ERROR: cannot borrow as mutable inside an `&` pattern
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//[classic2021,structural2021,classic2024,structural2024]~| ERROR: cannot borrow as mutable inside an `&` pattern
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let _: &mut bool = a;
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let _: &mut bool = b;
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let &[x] = &mut &mut [0];
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//[stable2021]~^ ERROR: mismatched types
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//[classic2021,classic2024]~^^ ERROR: cannot borrow as mutable inside an `&` pattern
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let _: &u32 = x;
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}
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