Only highlight control escapes in RegExp #1195
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The `\\c + ASCII letter` escape sequence is not specified as part of the [EscapeSequence] production in the grammar for strings. It behaves like any other unspecified character by ignoring the backslash. The escape sequence is only specified as part of the [CharacterEscape] production in the grammar for RegExp patterns, where it matches a character with the letter's codepoint mod 32 (which is the same for uppercase and lowercase ASCII letters). Update the syntax to highlight both uppercase and lowercase letters in RegExp and neither in strings. [CharacterEscape]: https://www.ecma-international.org/ecma-262/#prod-CharacterEscape [EscapeSequence]: https://www.ecma-international.org/ecma-262/#prod-EscapeSequence Signed-off-by: Kevin Locke <kevin@kevinlocke.name>
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The
\\c + ASCII letterescape sequence is not specified as part of the EscapeSequence production in the grammar for strings. It behaves like any other unspecified character by ignoring the backslash. The escape sequence is only specified as part of the CharacterEscape production in the grammar for RegExp patterns, where it matches a character with the letter's codepoint mod 32 (which is the same for uppercase and lowercase ASCII letters).This PR updates the syntax to highlight both uppercase and lowercase letters in RegExp and neither in strings.
Thanks for considering,
Kevin