Mark Lawrence wrote:
> On 17/07/2010 20:38, Mick Krippendorf wrote:
>>
>> If Java were *really* a multiple dispatch language, it wouldn't be
>> necessary to repeat the accept-code for every subclass. Instead a single
>> accept method in the base class would suffice. In fact, with true
>> multiple dispatch VP wouldn't even be needed.
>
> Boilerplate, boilerplate everywhere, but not a beer to drink.
That's Java for ya.
<python>
class ASTNode:
def accept(self, visitor):
getattr(visitor, self.__class__.__name__)(self)
class IfNode(ASTNode):
... # inherits generic accept method
class ElseNode(ASTNode):
... # inherits generic accept method
class PrettyPrinter:
def IfNode(self, node):
...
def ElseNode(self, node):
...
</python>
Regards,
Mick.
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