octave_base_value::print const-ness and method overload

[Michael Goffioul]

Hi John,

Would you mind having a quick look at the patch attached? This implements disp/display overload in classdef, by using the following mapping:

- print -> disp

- print_with_name -> display

There's a ugly hack in octave_classdef::print due to the const-ness of the method. Not really proud of it, but it was more a proof of concept. The question is whether it would be better to remove the const-ness of the method (as for print_with_name) instead?

Michael.

classdef-display
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