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fix(linter): reword diagnostic message for no-control-regex #10993

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May 13, 2025
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fix(linter): reword diagnostic message for no-control-regex #10993

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2 changes: 1 addition & 1 deletion crates/oxc_language_server/src/snapshots/[email protected]
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,7 @@ input_file: crates/oxc_language_server/fixtures/linter/regexp_feature/index.ts
---
code: "eslint(no-control-regex)"
code_description.href: "https://oxc.rs/docs/guide/usage/linter/rules/eslint/no-control-regex.html"
message: "Unexpected control character\nhelp: '\\u0000' is not a valid control character."
message: "Unexpected control character\nhelp: '\\u0000' is a control character."
range: Range { start: Position { line: 1, character: 13 }, end: Position { line: 1, character: 32 } }
related_information[0].message: ""
related_information[0].location.uri: "file://<variable>/fixtures/linter/regexp_feature/index.ts"
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10 changes: 4 additions & 6 deletions crates/oxc_linter/src/rules/eslint/no_control_regex.rs
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Expand Up @@ -40,7 +40,7 @@ fn no_control_regex_diagnostic(control_chars: &[Character], span: Span) -> OxcDi
let regexes = other_chars.iter().join(", ");
writeln!(
help,
"'{regexes}' {} not {}valid control character{}.",
"'{regexes}' {} {}control character{}.",
if other_chars.len() > 1 { "are" } else { "is" },
if other_chars.len() > 1 { "" } else { "a " },
if other_chars.len() > 1 { "s" } else { "" },
Expand All @@ -52,7 +52,7 @@ fn no_control_regex_diagnostic(control_chars: &[Character], span: Span) -> OxcDi
let regexes = octal_chars.iter().join(", ");
writeln!(
help,
"'{regexes}' {} not {}valid control character{}. They look like backreferences, but there {} no corresponding capture group{}. If you are trying to match the octal character, consider using '\\xNN' or '\\u00NN' instead.",
"'{regexes}' {} {}control character{}. They look like backreferences, but there {} no corresponding capture group{}.",
if octal_chars.len() > 1 { "are" } else { "is" },
if octal_chars.len() > 1 { "" } else { "a " },
if octal_chars.len() > 1 { "s" } else { "" },
Expand All @@ -62,10 +62,8 @@ fn no_control_regex_diagnostic(control_chars: &[Character], span: Span) -> OxcDi
}

if !null_chars.is_empty() {
writeln!(
help,
"'\\0' matches the null character (U+0000), which is a control character. If you intend to match the null character, consider using '\\x00' or '\\u0000' for clarity."
).unwrap();
writeln!(help, "'\\0' matches the null character (U+0000), which is a control character.")
.unwrap();
}

debug_assert!(!help.is_empty());
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Binary file modified crates/oxc_linter/src/snapshots/eslint_no_control_regex.snap
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8 changes: 4 additions & 4 deletions crates/oxc_linter/src/snapshots/[email protected]
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Expand Up @@ -6,25 +6,25 @@ source: crates/oxc_linter/src/tester.rs
1 │ const r = /\0/;
· ────
╰────
help: '\0' matches the null character (U+0000), which is a control character. If you intend to match the null character, consider using '\x00' or '\u0000' for clarity.
help: '\0' matches the null character (U+0000), which is a control character.

⚠ eslint(no-control-regex): Unexpected control character
╭─[no_control_regex.tsx:1:11]
1 │ const r = /[a-z]\1/;
· ─────────
╰────
help: '\1' is not a valid control character. They look like backreferences, but there is no corresponding capture group. If you are trying to match the octal character, consider using '\xNN' or '\u00NN' instead.
help: '\1' is a control character. They look like backreferences, but there is no corresponding capture group.

⚠ eslint(no-control-regex): Unexpected control character
╭─[no_control_regex.tsx:1:11]
1 │ const r = /([a-z])\2/;
· ───────────
╰────
help: '\2' is not a valid control character. They look like backreferences, but there is no corresponding capture group. If you are trying to match the octal character, consider using '\xNN' or '\u00NN' instead.
help: '\2' is a control character. They look like backreferences, but there is no corresponding capture group.

⚠ eslint(no-control-regex): Unexpected control character
╭─[no_control_regex.tsx:1:11]
1 │ const r = /([a-z])\0/;
· ───────────
╰────
help: '\0' matches the null character (U+0000), which is a control character. If you intend to match the null character, consider using '\x00' or '\u0000' for clarity.
help: '\0' matches the null character (U+0000), which is a control character.
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