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erlang: proplists module (get_value/get_all_values/is_defined/lookup/delete) (874/874)
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proplists BIFs in lib/erlang/lists-ext.sx (now lists + proplists).
Bare-atom shorthand {A,true}, first-match lookups, get_value default
undefined, lookup -> tuple | none. lists_ext suite 91 -> 103.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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giles
2026-06-30 14:00:13 +00:00
parent 394d5790ad
commit 3d8607a40a
5 changed files with 165 additions and 7 deletions
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plans/erlang-on-sx.md
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@@ -159,6 +159,8 @@ The Phase 9 opcodes are registered, tested, and bridged SX↔OCaml, but inert: n
_Newest first._
- **2026-06-30 stdlib hardening — `proplists` module** — Added `proplists:get_value/2,3`, `get_all_values/2`, `is_defined/2`, `lookup/2`, `delete/2` to `lib/erlang/lists-ext.sx` (header widened to "lists + proplists"). Property-list semantics: a bare atom `A` is shorthand for `{A, true}`, a tuple's first element is the key, lookups use the first match. `lookup` returns the tuple (or `{Key,true}`) or `none`; `get_value` defaults to `undefined`. The `lists_ext` suite (counter trio `er-lx-*`, now spanning both modules) 91→**103** (+12). Conformance **862 → 874/874**. loops/erlang only.
- **2026-06-30 stdlib hardening — `lists` flatmap/filtermap/mapfoldl/search** — Added `flatmap/2`, `filtermap/2` (`true` keep / `false` drop / `{true, V}` transform), `mapfoldl/3` (returns `{MappedList, AccFinal}`), `search/2` (`{value, E}` | `false`) to `lib/erlang/lists-ext.sx`. `lists_ext` suite 83→**91** (+8). Conformance **854 → 862/862**. The `lists` module is now broadly covered (sort/usort/keylists/fold/partition/while/flatten/min/max/zip/slicing/flatmap/filtermap/mapfoldl/search on top of the originals). loops/erlang only.
- **2026-06-30 stdlib hardening — `lists` slicing** — Added `sublist/2`, `sublist/3`, `nthtail/2`, `split/2`, `droplast/1` to `lib/erlang/lists-ext.sx`. `sublist` is lenient (clamps to list length); `nthtail/2` and `split/2` are strict (`badarg` when the list is shorter than N, matching the stdlib); `droplast/1` raises on `[]`. `lists_ext` suite 70→**83** (+13). Conformance **841 → 854/854**. loops/erlang only.