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Ignoring parameters
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From:
Gaal Yahas
Date:
June 16, 2005 08:56
Subject:
Ignoring parameters
Message ID:
20050616155552.GK14133@sike.forum2.org
Say I have a class method in FooClass, callable as FooClass.greet():
method greet(Class $class: ) {
say "Hello, FooClass!";
}
AFAIK, this is the only signature that would work for making &greet a
class method; but note that I'm not using $class, and I'd expect the
compiler to issue a warning in such a case.
The same problem exists with methods in classes fulfilling a role,
but which want to ignore a parameter in a required method.
What do you say about this proposed syntax?
method greet(Class undef: ) { ... }
# the interface calls for a "floor" as 1st arg
method bereaucracy(Int undef, Int $office_number) { ... }
I'm not sure how this works for named fields, but for positional ones
it should do well, and is similar to ($a, undef, $c) = LIST syntax.
--
Gaal Yahas <gaal@forum2.org>
http://gaal.livejournal.com/
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Ignoring parameters
by Gaal Yahas