mirror of
https://github.com/rust-lang-cn/book-cn.git
synced 2025-02-02 23:38:41 +08:00
34 lines
1.0 KiB
Plaintext
34 lines
1.0 KiB
Plaintext
$ cargo run
|
|
Compiling functions v0.1.0 (file:///projects/functions)
|
|
error[E0658]: `let` expressions in this position are experimental
|
|
--> src/main.rs:2:14
|
|
|
|
|
2 | let x = (let y = 6);
|
|
| ^^^^^^^^^
|
|
|
|
|
= note: see issue #53667 <https://github.com/rust-lang/rust/issues/53667> for more information
|
|
= help: you can write `matches!(<expr>, <pattern>)` instead of `let <pattern> = <expr>`
|
|
|
|
error: expected expression, found statement (`let`)
|
|
--> src/main.rs:2:14
|
|
|
|
|
2 | let x = (let y = 6);
|
|
| ^^^^^^^^^
|
|
|
|
|
= note: variable declaration using `let` is a statement
|
|
|
|
warning: unnecessary parentheses around assigned value
|
|
--> src/main.rs:2:13
|
|
|
|
|
2 | let x = (let y = 6);
|
|
| ^^^^^^^^^^^ help: remove these parentheses
|
|
|
|
|
= note: `#[warn(unused_parens)]` on by default
|
|
|
|
error: aborting due to 2 previous errors; 1 warning emitted
|
|
|
|
For more information about this error, try `rustc --explain E0658`.
|
|
error: could not compile `functions`
|
|
|
|
To learn more, run the command again with --verbose.
|