* bpo-41194: Convert _ast extension to PEP 489 (GH-21293)
Convert the _ast extension module to PEP 489 "Multiphase
initialization". Replace the global _ast state with a module state.
(cherry picked from commit b1cc6ba73a)
* bpo-41204: Fix compiler warning in ast_type_init() (GH-21307)
(cherry picked from commit 1f76453173)
* bpo-41194: Pass module state in Python-ast.c (GH-21284)
Rework asdl_c.py to pass the module state to functions in
Python-ast.c, instead of using astmodulestate_global.
Handle also PyState_AddModule() failure in init_types().
(cherry picked from commit 74419f0c64)
* bpo-41194: The _ast module cannot be loaded more than once (GH-21290)
Fix a crash in the _ast module: it can no longer be loaded more than
once. It now uses a global state rather than a module state.
* Move _ast module state: use a global state instead.
* Set _astmodule.m_size to -1, so the extension cannot be loaded more
than once.
(cherry picked from commit 91e1bc18bd)
Heap types now always visit the type in tp_traverse. See added docs for details.
This reverts commit 0169d3003b.
Automerge-Triggered-By: @encukou
(cherry picked from commit 1cf15af9a6)
Co-authored-by: Pablo Galindo <Pablogsal@gmail.com>
* Re-add removed classes Suite, slice, Param, AugLoad and AugStore.
* Add docstrings for dummy classes.
* Add docstrings for attribute aliases.
* Set __module__ to "ast" instead of "_ast".
* Remove the slice type.
* Make Slice a kind of the expr type instead of the slice type.
* Replace ExtSlice(slices) with Tuple(slices, Load()).
* Replace Index(value) with a value itself.
All non-terminal nodes in AST for expressions are now of the expr type.
Summary: This mostly migrates Python-ast.c to PEP384 and removes all statics from the whole file. This modifies the generator itself that generates the Python-ast.c. It leaves in the usage of _PyObject_LookupAttr even though it's not fully PEP384 compatible (this could always be shimmed in by anyone who needs it).
When using the "=" debug functionality of f-strings, use another Constant node (or a merged constant node) instead of adding expr_text to the FormattedValue node.
