local __TS__ParseInt
do
    local parseIntBasePattern = "0123456789aAbBcCdDeEfFgGhHiIjJkKlLmMnNoOpPqQrRsStTvVwWxXyYzZ"
    function __TS__ParseInt(numberString, base)
        if base == nil then
            base = 10
            local hexMatch = __TS__Match(numberString, "^%s*-?0[xX]")
            if hexMatch ~= nil then
                base = 16
                numberString = (__TS__Match(hexMatch, "-")) and "-" .. __TS__StringSubstring(
                    numberString,
                    string.len(hexMatch)
                ) or __TS__StringSubstring(
                    numberString,
                    string.len(hexMatch)
                )
            end
        end
        if base < 2 or base > 36 then
            return 0 / 0
        end
        local allowedDigits = base <= 10 and __TS__StringSubstring(parseIntBasePattern, 0, base) or __TS__StringSubstring(parseIntBasePattern, 0, 10 + 2 * (base - 10))
        local pattern = ("^%s*(-?[" .. allowedDigits) .. "]*)"
        local number = tonumber((__TS__Match(numberString, pattern)), base)
        if number == nil then
            return 0 / 0
        end
        if number >= 0 then
            return math.floor(number)
        else
            return math.ceil(number)
        end
    end
end