Thanks Niels, but what if a java class is not available for rewrite? Say, it is
from an external library.
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On Tue, Mar 17, 2015 at 10:01 PM, Niels van Klaveren
<niels.vanklave...@gmail.com> wrote:
> If a java class implements Iterable, it automatically supports seq.
> On Tuesday, March 17, 2015 at 11:34:17 AM UTC+1, juvenn wrote:
>>
>> Dear all,
>>
>> Given a node type from singly linked list:
>>
>> class Node {
>> int val;
>> Node next;
>> }
>>
>> How do I extend it so `(seq node)` will return a sequence of values? And
>> generally first, rest, and next will work on node too.
>>
>> While in Java, we could define the class to implement Iterable to achieve
>> this. In Clojure we do have `extend-type`, but it seems not accepting
>> interfaces to extend, nor do I find protocol for seqable.
>>
>> So generally, given a class defined in Java, assuming it is not available
>> for rewrite, how shall we extend the class to participate in sequence
>> operations in Clojure?
>>
>> Thanks in advance!
>>
>> —
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>>
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