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Specifically, this allows byte string literal patterns to be used where a `[u8]` or `[u8;N]` is expected when `deref_patterns` is enabled.
54 lines
1.8 KiB
Plaintext
54 lines
1.8 KiB
Plaintext
error[E0658]: use of unstable library feature `deref_patterns`: placeholder syntax for deref patterns
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--> $DIR/needs-gate.rs:5:9
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LL | deref!(0) => {}
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| ^^^^^
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= note: see issue #87121 <https://github.com/rust-lang/rust/issues/87121> for more information
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= help: add `#![feature(deref_patterns)]` to the crate attributes to enable
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= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
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error[E0308]: mismatched types
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--> $DIR/needs-gate.rs:11:9
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LL | match Box::new(0) {
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| ----------- this expression has type `Box<{integer}>`
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LL | 0 => {}
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| ^ expected `Box<{integer}>`, found integer
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= note: expected struct `Box<{integer}>`
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found type `{integer}`
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help: consider dereferencing to access the inner value using the Deref trait
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LL | match *Box::new(0) {
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| +
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error[E0308]: mismatched types
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--> $DIR/needs-gate.rs:18:9
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LL | match *"test" {
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| ------- this expression has type `str`
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LL | "test" => {}
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| ^^^^^^ expected `str`, found `&str`
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error[E0308]: mismatched types
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--> $DIR/needs-gate.rs:23:9
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LL | match *b"test" {
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| -------- this expression has type `[u8; 4]`
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LL | b"test" => {}
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| ^^^^^^^ expected `[u8; 4]`, found `&[u8; 4]`
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error[E0308]: mismatched types
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--> $DIR/needs-gate.rs:28:9
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LL | match *(b"test" as &[u8]) {
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| ------------------- this expression has type `[u8]`
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LL | b"test" => {}
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| ^^^^^^^ expected `[u8]`, found `&[u8; 4]`
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error: aborting due to 5 previous errors
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Some errors have detailed explanations: E0308, E0658.
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For more information about an error, try `rustc --explain E0308`.
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