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LibJS: Treat '\\' as an escaped character in template literals

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Before this change we would ignore that the second backslash is escaped
and template strings ending with ` \\` would be unterminated as the
second slash was used to escape the closing quote.
This commit is contained in:
davidot 2022-11-14 21:52:58 +01:00 • committed by Linus Groh
parent 8e624c8f6d
commit b3edd94869
2 changed files with 11 additions and 1 deletions
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9
Userland/Libraries/LibJS/Lexer.cpp
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@ -610,8 +610,15 @@ Token Lexer::next()
consume();
m_template_states.last().in_expr = true;
} else {
// TemplateCharacter ::
// $ [lookahead ≠ {]
// \ TemplateEscapeSequence
// \ NotEscapeSequence
// LineContinuation
// LineTerminatorSequence
// SourceCharacter but not one of ` or \ or $ or LineTerminator
while (!match('$', '{') && m_current_char != '`' && !is_eof()) {
if (match('\\', '$') || match('\\', '`'))
if (match('\\', '$') || match('\\', '`') || match('\\', '\\'))
consume();
consume();
}