Re: Overloaded operators

Peithon wrote:


General rule is that you should make the operators similar in behaviour to
the builtin operators, this is the "principle of least surprise". The
exception is when the behaviour is drastically different, like e.g.
operators << and >> for streams or to some extent even operator+ for
strings, in such cases you can also change the behaviour, because above
principle doesn't apply anyway.

Now, operator+, how should it work? Just take as an example the way that an
integer behaves, then substitute with your class and modify the operators
accordingly till the code compiles and the results fit.

 template<typename T>
 void test_plus(T const& a, T const& b) {
     T t1(a+b);
     T t2(a+a);
     T t4(a+b+a);
 }

The above code will compile for T=int or T=float, just take it as base for
your tests.

Uli

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