CODEWITHSUNDEEP
ruby
Cedric H.
Cedric H.

Reputation: 8288

Ruby operator overloading

I have a specific class C and I would like to overload some math operators.

I already overloaded +, i, *, and / so that I can do things like

a = C.new
b = C.new
a + b
a + 2
a + 2.0

To treat the last three cases, I am systematically testing for the type of the operand: is it C, Fixnum or Float, other possibilities are rejected. My first question is: is it the right way to do that?

Next I also want to be able to do

2.0 + A

How should I do it? Should I provide a conversion of some sort? Can these two problems be solved by the same method?

Upvotes: 2

Views: 3889

Answers (1)

iHiD
iHiD

Reputation: 2438

I believe the answer to "ruby operator overloading question" addresses both your points by using is_a? and coerce.

With regards to your first point. The normal approach in Ruby is to use respond_to? where possible, rather than checking for type. If for some reason you specifically need to check for type, then using is_a? is the correct way.

Upvotes: 4

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