Function atoi

common/src/config_parse.cpp:25–39

}

constexpr int atoi(std::string_view s) {
    int mult = 1, res = 0;
    switch (s.front()) {
        case '-':
            mult = -1;
        case '+':
            s = substr(s, 1);
            break;
    }

    for (auto c: s)
        res = res * 10 + ctoi(c);

    return mult * res;
}

static_assert(atoi("0") == 0);
static_assert(atoi("+10") == 10);