TSa Thomas.Sandlass-at-barco.com |Perl 6| wrote:
Then, since classes are open, the programmer can easily say
CGI does CGI::Simple;
That would be
class CGI is also { does CGI::Simple }
and means that CGI::Simple is a role, meant to serve as an interface
specification. It's not, it is a whole class that works on its own.
Also the direction is backwards. It won't let you pass the CGI::Simple
to the function expecting a CGI.
A syntax is needed for this express concept: "accept B as a substitute
for A", without changing A.
--John
