| //@ revisions: stable2021 classic2021 structural2021 classic2024 structural2024 |
| //@[stable2021] edition: 2021 |
| //@[classic2021] edition: 2021 |
| //@[structural2021] edition: 2021 |
| //@[classic2024] edition: 2024 |
| //@[structural2024] edition: 2024 |
| //@[stable2021] run-pass |
| //@[classic2021] run-pass |
| //@[structural2021] run-pass |
| //@ dont-require-annotations: NOTE |
| |
| //! Test diagnostics for binding with `mut` when the default binding mode is by-ref. |
| #![allow(incomplete_features, unused_assignments, unused_variables)] |
| #![cfg_attr(any(classic2021, classic2024), feature(ref_pat_eat_one_layer_2024))] |
| #![cfg_attr(any(structural2021, structural2024), feature(ref_pat_eat_one_layer_2024_structural))] |
| |
| pub fn main() { |
| struct Foo(u8); |
| |
| let Foo(mut a) = &Foo(0); |
| //[classic2024,structural2024]~^ ERROR: binding cannot be both mutable and by-reference |
| #[cfg(any(stable2021, classic2021, structural2021))] { a = 42 } |
| #[cfg(any(classic2024, structural2024))] { a = &42 } |
| |
| let Foo(mut a) = &mut Foo(0); |
| //[classic2024,structural2024]~^ ERROR: binding cannot be both mutable and by-reference |
| #[cfg(any(stable2021, classic2021, structural2021))] { a = 42 } |
| #[cfg(any(classic2024, structural2024))] { a = &mut 42 } |
| |
| let [&mut mut x] = &[&mut 0]; |
| //[classic2024]~^ ERROR: mismatched types |
| //[classic2024]~| NOTE cannot match inherited `&` with `&mut` pattern |
| //[structural2024]~^^^ ERROR binding cannot be both mutable and by-reference |
| #[cfg(any(stable2021, classic2021, structural2021))] { x = 0 } |
| } |
