static bool scan_raw_string_delimiter()

in tree-sitter-mozcpp/src/scanner.c [26:56]

• 23 lines of code
• 10 McCabe index (conditional complexity)

static bool scan_raw_string_delimiter(Scanner *scanner, TSLexer *lexer) {
    if (scanner->delimiter_length > 0) {
        // Closing delimiter: must exactly match the opening delimiter.
        // We already checked this when scanning content, but this is how we
        // know when to stop. We can't stop at ", because R"""hello""" is valid.
        for (int i = 0; i < scanner->delimiter_length; ++i) {
            if (lexer->lookahead != scanner->delimiter[i]) {
                return false;
            }
            advance(lexer);
        }
        reset(scanner);
        return true;
    }

    // Opening delimiter: record the d-char-sequence up to (.
    // d-char is any basic character except parens, backslashes, and spaces.
    for (;;) {
        if (scanner->delimiter_length >= MAX_DELIMITER_LENGTH || lexer->eof(lexer) || lexer->lookahead == '\\' ||
            iswspace(lexer->lookahead)) {
            return false;
        }
        if (lexer->lookahead == '(') {
            // Rather than create a token for an empty delimiter, we fail and
            // let the grammar fall back to a delimiter-less rule.
            return scanner->delimiter_length > 0;
        }
        scanner->delimiter[scanner->delimiter_length++] = lexer->lookahead;
        advance(lexer);
    }
}