On Mon, 21 Aug 2006, Mark Stosberg wrote: > In S12, we see a number examples of: > > class Dog is Mammal > http://dev.perl.org/perl6/doc/design/syn/S12.html > > However, it's not clear if it is necessary to preload Mammal for Dog > to function properly here, or what that syntax would be. > > Testing with current version of pugs, this doesn't happen. Adding > "use Mammal" before this syntax seems to fix it, but doesn't seem like > it should be necessary, especially since "use Mammal" has traditionally > implied as "has-a" relationship. > > Mark
If "is Mammal" were to cause an implicit "use Mammal", then I would expect this to happen only conditionally, such as if no "Mammal" has yet been declared in some already used (or the current) file (it may be declared in a file not named "Mammal". Even then, I don't know if this implicit 'use' action would be a good idea, as it may be a source of bugs. -- Darren Duncan
