Every Bast* type drops <'a>: &'a str -> String, &'a Value -> Value
(deferred decision 1: plain String/Value — the tree is built once;
Arc<str> name-sharing needs a bench justification that doesn't exist).
BastDoc::new(&Value, &str) still takes references in and clones into
owned storage; the doc gains Clone. resolve_ref/resolve_typeref/
resolve_typeref_as_def return owned types.
- Engine ownership flip: AlkTypeEngine holds the owned BastDoc
(replacing bast_doc: Value + root_name: String; root_name()
delegates to the doc), killing its three per-call BastDoc::new
re-parses (aligned validate_bytes, read_field, write_field — the
review #004 M1 pattern removed by construction; phase 5 retires the
lookup_leaf_field walk itself). New public accessor root_name()
(additive). Engine Send + Sync with the owned doc, asserted in the
existing thread-share test.
- Bonus cleanup: materialize_typeref_packed's dead _field param
dropped (phase 2 left it dangling). Under ownership, keeping it
would force a deep Value clone per array element / record value /
union variant via dummy_field_for. The param, dummy_field_for, and
ty_source are gone; no behavior change (the arg was already
ignored). BastField::synthetic keeps an owned-signature
#[allow(dead_code)] definition (no remaining callers today).
- Consumers adapted: OffsetMap::compute(&BastDoc),
materialize_aligned(&BastDoc, ...) (no lifetime), BuildCtx/
ComputeCtx hold &'d BastDoc, tunion/discriminator name borrows,
lib.rs module doc. LayoutBuilder's doc_value re-parse cache is
unchanged pending phase 4.
Verification: 465 tests pass with zero test-logic changes (bast.rs
suites exercise every parser path through the public API); clippy
-D warnings clean; cargo doc zero warnings; wasm32 release build
green.
glm-5.3-flash
c583762352