979486600a
Root cause of HAMT failure: Janet uses 64-bit doubles, bit operations
require 32-bit signed ints. Hash values from Janet exceed this range.
Solution: Replaced bit-trie HAMT with simple array-based implementation:
- find-key-index: linear scan for key lookup
- node-assoc: append-to-array on insert, clone+update on replace
- node-find: linear scan for value retrieval
All operations work correctly:
(hash-map :a 1) → {:root [:a 1], :count 1}
(hash-map :a 1 :b 2) → {:root [:a 1 :b 2], :count 2}
phm-assoc / phm-get / phm-count all verified
O(n) lookup (acceptable for small maps). HAMT can be reintroduced
once Janet gets proper 32-bit int support or we implement bit ops
in pure Janet.
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