From: ts <decoux@...>
Date: 2002-12-14T19:45:03+09:00
Subject: Re: Inheritance Question

>>>>> "a" == ahoward  <ahoward@fsl.noaa.gov> writes:

a> p ((mm + Matrix[[12]]).type) 	# >> MyMatrix
a> p ((Matrix[[12]] + mm).type) 	# >> Matrix
a> p ((mm + mm).type          ) 	# >> MyMatrix

 Now you have a big problem, because this not what ruby do

pigeon% cat b.rb
#!/usr/bin/ruby
class A < Array; end
a = A.new
p ((a+[]).class)
p (([]+a).class)
p ((a+a).class)
pigeon% 

pigeon% b.rb
Array
Array
Array
pigeon% 

a> this is exactly what i was refering to :

a> all references to 'Matrix.method' from INSIDE instance methods need to
a> bechanged to 'type.method' and all is well...

 you have written a class which break completely the way that ruby work,
 and all persons will be surprised by your strange class.

a> course *not*.  if one realizes the Object + AnOther is really
a> Object.+(AnOther) is makes perfect sense.

 it make perfect sense in *your* language, but this language *is NOT* ruby.


Guy Decoux