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Add Suggestions for Misspelled Keywords

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This PR detects misspelled keywords using two heuristics:

1. Lowercasing the unexpected identifier.
2. Using edit distance to find a keyword similar to the unexpected identifier.

However, it does not detect each and every misspelled keyword to
minimize false positives and ambiguities. More details about the
implementation can be found in the comments.
This commit is contained in:
Veera 2024-09-02 12:43:35 -04:00
parent 265cd14cd4
commit 14e86eb7d9
32 changed files with 298 additions and 17 deletions
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6
compiler/rustc_parse/messages.ftl
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@ -381,6 +381,7 @@ parse_invalid_char_in_escape_msg = invalid character in {$is_hex ->
*[false] unicode
} escape
parse_invalid_comparison_operator = invalid comparison operator `{$invalid}`
.use_instead = `{$invalid}` is not a valid comparison operator, use `{$correct}`
.spaceship_operator_invalid = `<=>` is not a valid comparison operator, use `std::cmp::Ordering`
@ -581,6 +582,11 @@ parse_missing_trait_in_trait_impl = missing trait in a trait impl
.suggestion_add_trait = add a trait here
.suggestion_remove_for = for an inherent impl, drop this `for`
parse_misspelled_kw = {$is_incorrect_case ->
[true] write keyword `{$similar_kw}` in lowercase
*[false] there is a keyword `{$similar_kw}` with a similar name
}
parse_modifier_lifetime = `{$modifier}` may only modify trait bounds, not lifetime bounds
.suggestion = remove the `{$modifier}`