namespace private_TODO
{
CONSTEXPR bool is_digit(char c)
{
    return c <= '9' && c >= '0';
}

CONSTEXPR unsigned stoi_impl(const char* str, int rec = 0, int value = 0)
{
    return rec != 0 ?
        is_digit(*str) ?
        stoi_impl(str + 1, rec--, (*str - '0') + value * 10)
        : throw "Compile-time-error: not a digit"
        : value;
}

CONSTEXPR unsigned stoi(const char* str, int maxIter)
{
    return stoi_impl(str, maxIter);
}

CONSTEXPR unsigned year(const char* str)
{
    return stoi(str, 4);
}

CONSTEXPR bool str_cmp(const char* str, const char* str2, unsigned sz)
{
    return sz != 0 ?
        *str == *str2 ? str_cmp(str + 1, str2 + 1, sz--)
            : false
        : true;
}

CONSTEXPR unsigned month(const char* str)
{
    return str_cmp(str, "Jan", 3) ? 1 :
        str_cmp(str, "Feb", 3) ? 2 :
        str_cmp(str, "Mar", 3) ? 3 :
        str_cmp(str, "Apr", 3) ? 4 :
        str_cmp(str, "May", 3) ? 5 :
        str_cmp(str, "Jun", 3) ? 6 :
        str_cmp(str, "Jul", 3) ? 7 :
        str_cmp(str, "Aug", 3) ? 8 :
        str_cmp(str, "Set", 3) ? 9 :
        str_cmp(str, "Oct", 3) ? 10 :
        str_cmp(str, "Nov", 3) ? 11 :
        str_cmp(str, "Dec", 3) ? 12 :
        throw "Compile-time error: Not a month!";
}

CONSTEXPR unsigned day(const char* str)
{
    return stoi(str, 2);
}

CONSTEXPR unsigned str_size(const char* str, unsigned value = 0)
{
    return *str != 0 ?
        str_size(str++, value++)
        : value;
}

CONSTEXPR unsigned total(const char* str)
{
    return (str_size(str) == 11 && str[3] == ' ' && str[6] == ' ') ?
        year(str + 7) * 512 + month(str) * 32 + day(str + 4)
        : throw "invalid string";
}
}

#define TODO(DATE, MESSAGE)
static_assert(::private_TODO::total(__DATE__) < ::private_TODO::total(DATE), MESSAGE)
void test()
{
    TODO("NOV 16 2017", "THIS SHOULD THROW"); //11/16/17 is when I tested
}