Pure simplification pass, no behaviour change — hashes, canonical
forms, diagnostic codes, and emitted IR are byte-identical (hash-pin
and IR-pin tests unchanged and green).
ailang-check:
- strip_forall and collect_pattern_binders were triplicated verbatim
across linearity.rs / reuse_shape.rs / uniqueness.rs; hoisted each to
a single pub(crate) fn in lib.rs.
- mono.rs::pattern_binders was a fourth copy of collect_pattern_binders
(iterative style, same result for every Pattern shape); deleted, now
calls the shared fn.
- maybe_instantiate and expect_eq were single-call wrappers; inlined
at their sole call sites and removed.
ailang-core:
- collect_used_in_pattern was a verbatim duplicate of pattern_binds;
deleted, call site repointed. pattern_binds made private (no external
callers; the doc-comment's lift_letrecs claim was stale).
- is_false serde helper replaced by std::ops::Not::not at the four
skip_serializing_if sites (all plain-bool fields); helper removed.
- test-only any_nested_ctor / any_let_rec folded into one generic
any_term(t, &pred) walker.
- removed dead test helpers tmp_dir / examples_dir, orphaned when their
tests relocated to tests/workspace_pin.rs.
ailang-codegen:
- removed the write-only Emitter::types field, its populating loop, and
the now-unused CtorInfo struct it fed.
- adt_drop_symbol / adt_partial_drop_symbol differed only in a prefix
literal; folded into one adt_symbol(prefix, ...). Symbol strings
unchanged.
Net -180 LOC.
Brummel
ac9171ebf0