moonbitlang / core / 2200

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push

github

fix(queue): handle self-transfer as no-op and improve documentation

Queue::transfer(q, q) previously caused the queue to become empty due to
calling self.clear() when self and dst were the same object. This change
adds a physical_equal check to make self-transfer a no-op, matching the
semantic expectation that "transfer elements to self" leaves the queue
unchanged.

Also improved Queue type documentation to explain the layout and why
both `first` and `last` pointers are kept (O(1) push and pop).

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

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