With -builtin, alternate constructor aliases such as pair = new_pair
were emitted as pure Python code. Pyrefly could not resolve the internal
new_ entry points imported from the native module, so these assignments
caused type checking to fail.
Register alternate constructor wrappers under their public names in the
low-level module. Do not expose internal new_ names or generate Python
assignments to provide the public names.
This covers explicitly renamed constructors, named constructor template
instantiations and implicit constructors for renamed C structs.
Add a Python 3.14 CI build with -builtin -typehints to exercise the
generated type hints with Pyrefly.
Assisted-by: Codex (GPT-5.6 Sol)
William S Fulton