e24833a4a8
This also adds `#[cfg]` attributes to tests for bindings' types, to make it visually clearer which revisions type successfully.
34 lines
1.5 KiB
Rust
34 lines
1.5 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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//@[stable2021] run-pass
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//@[classic2021] run-pass
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//@[structural2021] run-pass
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//! Test diagnostics for binding with `mut` when the default binding mode is by-ref.
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#![allow(incomplete_features, unused_assignments, unused_variables)]
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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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struct Foo(u8);
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let Foo(mut a) = &Foo(0);
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//[classic2024,structural2024]~^ ERROR: binding cannot be both mutable and by-reference
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#[cfg(any(stable2021, classic2021, structural2021))] { a = 42 }
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#[cfg(any(classic2024, structural2024))] { a = &42 }
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let Foo(mut a) = &mut Foo(0);
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//[classic2024,structural2024]~^ ERROR: binding cannot be both mutable and by-reference
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#[cfg(any(stable2021, classic2021, structural2021))] { a = 42 }
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#[cfg(any(classic2024, structural2024))] { a = &mut 42 }
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let [&mut mut x] = &[&mut 0];
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//[classic2024]~^ ERROR: mismatched types
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//[classic2024]~| cannot match inherited `&` with `&mut` pattern
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//[structural2024]~^^^ binding cannot be both mutable and by-reference
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#[cfg(any(stable2021, classic2021, structural2021))] { x = 0 }
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}
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