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2487765b88
When writing a constant name incorrectly in a pattern, the pattern will be identified as a new binding. We look for consts in the current crate, consts that where imported in the current crate and for local `let` bindings in case someone got them confused with `const`s.
```
error: unreachable pattern
--> $DIR/const-with-typo-in-pattern-binding.rs:30:9
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LL | GOOOD => {}
| ----- matches any value
LL |
LL | _ => {}
| ^ no value can reach this
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help: you might have meant to pattern match against the value of similarly named constant `GOOD` instead of introducing a new catch-all binding
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LL | GOOD => {}
| ~~~~
```
Fix #132582.
79 lines
2.4 KiB
Plaintext
79 lines
2.4 KiB
Plaintext
error: unreachable pattern
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--> $DIR/const-with-typo-in-pattern-binding.rs:18:9
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LL | X => {}
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| - matches any value
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LL | _ => {}
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| ^ no value can reach this
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note: there is a constant of the same name, which could have been used to pattern match against its value instead of introducing a new catch-all binding, but it is not accessible from this scope
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--> $DIR/const-with-typo-in-pattern-binding.rs:5:5
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LL | const X: i32 = 0;
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| ^^^^^^^^^^^^
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note: the lint level is defined here
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--> $DIR/const-with-typo-in-pattern-binding.rs:1:9
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LL | #![deny(unreachable_patterns)]
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| ^^^^^^^^^^^^^^^^^^^^
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error: unreachable pattern
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--> $DIR/const-with-typo-in-pattern-binding.rs:24:9
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LL | GOD => {}
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| --- matches any value
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LL |
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LL | _ => {}
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| ^ no value can reach this
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help: you might have meant to pattern match against the value of similarly named constant `god` instead of introducing a new catch-all binding
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LL | god => {}
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| ~~~
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error: unreachable pattern
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--> $DIR/const-with-typo-in-pattern-binding.rs:30:9
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LL | GOOOD => {}
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| ----- matches any value
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LL |
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LL | _ => {}
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| ^ no value can reach this
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help: you might have meant to pattern match against the value of similarly named constant `GOOD` instead of introducing a new catch-all binding
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LL | GOOD => {}
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| ~~~~
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error: unreachable pattern
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--> $DIR/const-with-typo-in-pattern-binding.rs:36:9
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LL | name => {}
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| ---- matches any value
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LL |
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LL | _ => {}
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| ^ no value can reach this
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note: there is a binding of the same name; if you meant to pattern match against the value of that binding, that is a feature of constants that is not available for `let` bindings
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--> $DIR/const-with-typo-in-pattern-binding.rs:14:9
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LL | let name: i32 = 42;
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| ^^^^
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error: unreachable pattern
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--> $DIR/const-with-typo-in-pattern-binding.rs:42:9
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LL | ARCH => {}
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| ---- matches any value
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LL |
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LL | _ => {}
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| ^ no value can reach this
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help: you might have meant to pattern match against the value of constant `ARCH` instead of introducing a new catch-all binding
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LL | std::env::consts::ARCH => {}
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| ~~~~~~~~~~~~~~~~~~~~~~
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error: aborting due to 5 previous errors
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