glm-5.2
c0217d91a8
POC: /workspace/alktype-builder-poc/ (18/18 tests pass, findings in
docs/research/alktype-builder-poc/findings.md). Round 2 adds the SFTP
Packet validate_bytes tests (7 new: valid Init/Read/Write/Status,
short buffer, unknown discriminator, over-maxLength Bytes).
Open questions resolved (OQ-004 through OQ-008):
- OQ-004: Discriminator::Field name is String (already implemented;
docs updated to mark resolved)
- OQ-005: Both union discriminator kinds return the same shape:
{__discriminator, ...variant-fields}. Field-name path also had a
real offset bug (returned start, not end) - fixed.
- OQ-006: builder.md Example 3 now wraps the Union in a
Schema::struct_().field("payload", ...) and merges $defs via
Definitions::merge_into (matches the engine's AlkType:Struct-at-root
constraint and the SFTP wire shape)
- OQ-007: Bytes materialization is array-of-u8 (Value::Array of
Value::Number, one entry per byte 0..=255). BytesValidator accepts
both Value::String (validate_json) and Value::Array (validate_bytes).
maxLength = max byte count. Replaces the lossy from_utf8_lossy path
that corrupted non-UTF-8 bytes and broke maxLength semantics.
- OQ-008 (new): UnionValidator now dispatches to variant schemas via
sub-validators built at factory time. AlkTypeEngine::compile calls
schema::inline_union_variant_refs before build_validator to inline
$refs in union mapping entries (necessary because union_factory
receives the union node, but $defs live at the schema root).
Production-readiness fixes in src/ (no stubs/hedges in a published crate):
- materialize.rs: Record stub -> full count-prefixed key/value pair
implementation per schema-layer.md TRecord
- materialize.rs: root_of() was broken (returned the current node, not
the schema root) -> root schema threaded through every recursive call
so resolve_ref_or_inline can resolve $refs for nested composites
- builder.rs: LengthPrefixed encoding setter was a no-op when the
keyword was already in object form -> complete the branch (updates
the encoding entry in place for both LengthPrefixed and OffsetIndirect)
- builder.rs, engine.rs: POC-referencing comments cleaned up; the
round-trip test's or_else fallback (papering over write_field being
aligned-only) replaced with direct byte writes
Documentation:
- builder.md: Example 3 updated; Discriminator::Field spec shows String;
Open Questions section updated (OQ-004 resolved)
- validation.md: AlkType:Bytes and AlkType:Union validator descriptions
updated for array-of-u8 form and variant dispatch
- open-questions.md: OQ-004/005/006/007/008 marked resolved; new
Validation theme entries
- questions/004-008: individual OQ files updated with resolutions
- findings.md: round 2 results documented
Verification:
- cargo test: 369 -> 391 tests pass (22 new: 14 materialize, 5
inline_union_variant_refs, 3 validation/builder)
- cargo clippy --all-targets: clean
- POC: 11 -> 18 tests (7 new SFTP Packet tests); all pass