Parity push #1 — six gap fixes on top of the 11-phase plan:
- Parent-module bindings: `import a.b.c` now binds `a`, `a.b`, `a.b.c`
via py_bind_dotted_prefixes. Walks the dotted prefix chain on every
import, regardless of import_is_from_style. Plus an attribute-access
path on a MODULE that detects submodules: when the registry has any
function whose qn starts with `<mod>.<attr>.`, evaluating `mod.attr`
yields MODULE("<mod>.<attr>"). This makes `os.path.join(...)` and
similar resolve correctly.
- typing.cast(T, x) returns NAMED(T) (re-evaluating T as an annotation,
so generic subscripts and forward references both resolve). Detects
bare `cast(...)` and qualified `typing.cast(...)` forms.
- typing.assert_type(x, T) is a no-op at runtime; we type the result
as type-of(x).
- Forward references as quoted strings: `def f(x: "Foo")` strips quotes
and re-resolves the inner annotation. Also handles double-quoted and
single-quoted forms.
- Self return type substitution: methods declared returning `Self` /
`typing.Self` / `typing_extensions.Self` substitute to NAMED(receiver)
at call resolution time. Enables fluent / builder pattern chaining
to keep resolving methods after each step.
- Generic subscript stripping: annotations like `list[Foo]` strip to
`list` for v1; `Optional[Foo]` likewise. Container element-type
substitution still deferred (Phase 8+).
Generator additions:
- Allowlist now includes urllib, http, concurrent (top stdlib usage).
- `from X import *` re-export following at generation time. Modules
like os.path (a star-import shim of posixpath / ntpath / genericpath)
now have all forwarded definitions registered under their own QN.
Iterates to a fixed point with an 8-step ceiling. typeshed tree
expansion is bounded — only modules transitively reachable from the
allowlist are pulled in.
Stats: 137 modules, 904 classes (2797 methods), 886 free functions
(was 114 / 753 / 794). Generated file grows from 20K to ~22K lines.
6 new test_py_lsp.c cases. All 2874 prior tests stay green.
Martin Vogel
2e042dab0b