Function parse_char_class_char

common/peg-parser.cpp:181–220

}

static std::pair<uint32_t, size_t> parse_char_class_char(const std::string & content, size_t pos) {
    if (content[pos] == '\\' && pos + 1 < content.length()) {
        switch (content[pos + 1]) {
            case 'x': {
                auto result = parse_hex_escape(content, pos + 2, 2);
                if (result.second > 0) {
                    return {result.first, 2 + result.second};
                }
                // Invalid escape, treat as literal 'x'
                return {static_cast<uint32_t>('x'), 2};
            }
            case 'u': {
                auto result = parse_hex_escape(content, pos + 2, 4);
                if (result.second > 0) {
                    return {result.first, 2 + result.second};
                }
                // Invalid escape, treat as literal 'u'
                return {static_cast<uint32_t>('u'), 2};
            }
            case 'U': {
                auto result = parse_hex_escape(content, pos + 2, 8);
                if (result.second > 0) {
                    return {result.first, 2 + result.second};
                }
                // Invalid escape, treat as literal 'U'
                return {static_cast<uint32_t>('U'), 2};
            }
            case 'n':  return {'\n', 2};
            case 't':  return {'\t', 2};
            case 'r':  return {'\r', 2};
            case '\\': return {'\\', 2};
            case ']':  return {']', 2};
            case '[':  return {'[', 2};
            default:   return {static_cast<uint32_t>(content[pos + 1]), 2};
        }
    }

    // Regular character - return as codepoint
    return {static_cast<uint32_t>(static_cast<unsigned char>(content[pos])), 1};
}

static std::pair<std::vector<common_peg_chars_parser::char_range>, bool> parse_char_classes(const std::string & classes) {
    std::vector<common_peg_chars_parser::char_range> ranges;