C++ (Cpp) Integer::neg示例

RCP<const Number> Integer::pow_negint(const Integer &other) const {
    RCP<const Number> tmp = powint(*other.neg());
    if (is_a<Integer>(*tmp)) {
        mpq_class q(sgn(rcp_static_cast<const Integer>(tmp)->i), abs(rcp_static_cast<const Integer>(tmp)->i));
        return make_rcp<const Rational>(q);
    } else {
        throw std::runtime_error("powint returned non-integer");
    }
}

示例#2

显示文件

RCP<const Number> Integer::pow_negint(const Integer &other) const
{
    RCP<const Number> tmp = powint(*other.neg());
    if (is_a<Integer>(*tmp)) {
        const integer_class &j = down_cast<const Integer &>(*tmp).i;
#if SYMENGINE_INTEGER_CLASS == SYMENGINE_BOOSTMP
        // boost::multiprecision::cpp_rational lacks an (int, cpp_int)
        // constructor. must use cpp_rational(cpp_int,cpp_int)
        rational_class q(integer_class(mp_sign(j)), mp_abs(j));
#else
        rational_class q(mp_sign(j), mp_abs(j));
#endif
        return Rational::from_mpq(std::move(q));
    } else {
        throw SymEngineException("powint returned non-integer");
    }
}