LibJS: Parse line continuations in string literals properly

Newlines after line continuation were inserted into the string literals. This patch makes the parser ignore the newlines after \ and also makes it so that "use strict" containing a line continuation is not a valid "use strict".
Author: https://github.com/nooga Commit: e5ddcadd3c Pull-request: https://github.com/SerenityOS/serenity/pull/3845 Issue: https://github.com/SerenityOS/serenity/issues/3816 Reviewed-by: https://github.com/linusg ✅
2025-06-10 18:10:56 +09:00 · 2020-10-25 14:46:51 +01:00 · 2020-10-25 14:46:51 +01:00 · e5ddcadd3c · 2024-07-19 01:44:24 +09:00
commit e5ddcadd3c
parent e6505a95f1
4 changed files with 18 additions and 0 deletions
--- a/Libraries/LibJS/Token.cpp
+++ b/Libraries/LibJS/Token.cpp
@ -155,6 +155,8 @@ String Token::string_value(StringValueStatus& status) const
            case '\\':
                builder.append('\\');
                break;
+            case '\n':
+                break;
            case 'x': {
                if (i + 2 >= m_value.length() - offset)
                    return encoding_failure(StringValueStatus::MalformedHexEscape);