Question

Assuming that i’ve implemented *=, = and * operators overloading, which will you prefer to use complexity wise?
Thanks.

Answer 1

Given that I’d usually implement operator * in terms of operator *= and a copy, there is no reason ever to prefer operator *.

The normal implementation of operator * (and +, -, / etc.) should usually look as follows:

T operator *(T const& left, T const& right) {
    T result = left;
    return result *= right;
}