giles 41190c6d23 ocaml: phase 6 Hashtbl.keys/values/bindings/remove/clear (+4 tests, 545 total) ...

Two new host primitives:
  _hashtbl_remove t k   -> dissoc the key from the underlying dict
  _hashtbl_clear  t     -> reset the cell to {}

Eight new OCaml-syntax helpers in runtime.sx Hashtbl module:
  bindings t            = _hashtbl_to_list t
  keys t                = List.map (fun (k, _) -> k) (...)
  values t              = List.map (fun (_, v) -> v) (...)
  to_seq t              = bindings t
  to_seq_keys / to_seq_values
  remove / clear / reset

The keys/values implementations use a 'fun pair -> match pair with
(k, _) -> k' indirection because parse-fun does not currently allow
tuple patterns directly on parameters. Same restriction we worked
around in iteration 98's let-pattern desugaring.

Also: a detour attempting to add top-level 'let (a, b) = expr'
support was started but reverted — parse-decl-let in the outer
ocaml-parse-program scope does not have access to parse-pattern
(which is local to ocaml-parse). Will need a slice + re-parse trick
later.

2026-05-09 03:59:20 +00:00

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