incorrect regex compilation

[Sinfolke]

I honestly didn't learn the c++ and i want to use compiler just to create a quick binary file.
The part of ts file:

/**
 * Defines whether a line contains unclosed brackets.
 * @param symbol the close and open symbol. Example: {|}, '{' is opend and '}' is close symbol     
 * @param line the line to be searched in
 * @returns undefined if all brackets on a line are closed or array with amount of unclosed brackets and id of last unclosed
 */
function unclosed(symbol:string, line: string) {
    let openedBrackets = 0;
    let match;
    let id = 0;
    const splitted = symbol.split('|');
    const escapeCharactersRegex = /(\(|\)|\[|\]|\{|\}|\*|\||\$|\+|\\)/;
    const escapeStart = !!splitted[0].match(escapeCharactersRegex);
    const escapeEnd = !!splitted[1].match(escapeCharactersRegex);
    const openRegex = new RegExp(`(?<!\\\\)(?:\\\\\\\\)*${escapeStart ? '\\' : ''}${splitted[0]}`, "g");
    const closeRegex = new RegExp(`(?<!\\\\)(?:\\\\\\\\)*${escapeEnd ? '\\' : ''}${splitted[1]}`, "g");
    while ((match = openRegex.exec(line)) !== null) {
        openedBrackets++;
        id = match.index + 1;
    }
    while ((match = closeRegex.exec(line)) !== null) {
        openedBrackets--;
    }
    if (openedBrackets % 2 != 0) {
        return [openedBrackets, id];
    }
}

The output c++ file:

any unclosed(string symbol, string line)
{
    auto openedBrackets = 0;
    any match;
    auto id = 0;
    auto splitted = symbol->split(STR("|"));
    auto escapeCharactersRegex = (new RegExp(STR("(\(|\)|\[|\]|\{|\}|\*|\||\$|\+|\\")));
    auto escapeStart = !!const_(splitted)[0]->match(escapeCharactersRegex);
    auto escapeEnd = !!const_(splitted)[1]->match(escapeCharactersRegex);
    auto openRegex = std::make_shared<RegExp>(STR("(?<!\\)(?:\\\\)*") + (escapeStart) ? STR("\") : string_empty + string_empty + const_(splitted)[0] + string_empty, STR("g"));
    auto closeRegex = std::make_shared<RegExp>(STR("(?<!\\)(?:\\\\)*") + (escapeEnd) ? STR("\") : string_empty + string_empty + const_(splitted)[1] + string_empty, STR("g"));
    while ((match = openRegex->exec(line)) != nullptr)
    {
        openedBrackets++;
        id = match["index"] + 1;
    }
    while ((match = closeRegex->exec(line)) != nullptr)
    {
        openedBrackets--;
    }
    if (not_equals(openedBrackets % 2, 0)) {
        return array<js::number>{ openedBrackets, id };
    }
};

The issue is that it escaped the end quote (escapeStart) ? STR("") and so it is not considered end of string, the same is on the second line which contains almost the same pattern

[ASDAlexander77]

yes, it should have extra "\" in regex.