note audreyt <p>The dash syntax one was straightforward. This works in Perl 5:</p> <code> *{"foo-bar"} = sub { "Hello, @_!\n" }; print &{"foo-bar"}('world'); </code> <p>It might work in Perl 4 or even Perl 3, but I had not verified yet... :-)</p> <p>As for object systems: Well, the very notion of "object systems" means "interfaces as types", and it's precisely across those interfaces we bridge between calling conventions. </p> <p>Please refer to William Cook's <a href="http://userweb.cs.utexas.edu/users/wcook/Drafts/2009/DataAbstractionRevisitedTalk.pdf">slides</a> and <a href="http://userweb.cs.utexas.edu/~wcook/Drafts/2009/essay.pdf">essay</a> for more rigorous explanations of the interface/OO link.</p> <p>So in that sense, there are really no totally incompatible object systems, since any two such systems can embed one another using cross-system meta-object protocol.</p> 836349 836490