preprocessor.iter_next_lowering Namespace Reference

Classes
class	_Lowering

Functions
	_scope_nodes (scope)
	_is_call (node, name, nargs)
	_single_assignment (node)
	_iterator_classes (module)
	_list_iterator_class (name)
	_uses (nodes, name)
	lower_iter_next (module)

Variables
tuple	_SCOPES = (ast.FunctionDef, ast.AsyncFunctionDef, ast.Lambda, ast.ClassDef)

Detailed Description

Lower iter() and next() over a list or a user iterator (#8284).

Neither builtin is modelled, so `g = iter(xs)` was refused and `next(g)` was an
unsupported call. Where `g` is bound once and only ever read as `next(g)`, the
iterator becomes an instance of a small per-site class over `list(xs)`, or, for
an instance of a class defining `__iter__` and `__next__`, that instance's own
`__iter__()`; each `next(g)` becomes `g.__next__()`.

Function Documentation

_is_call()

preprocessor.iter_next_lowering._is_call ( node, name, nargs )

protected

_iterator_classes()

preprocessor.iter_next_lowering._iterator_classes ( module )

protected

Top-level classes defining both __iter__ and __next__.

_list_iterator_class()

preprocessor.iter_next_lowering._list_iterator_class ( name )

protected

_scope_nodes()

preprocessor.iter_next_lowering._scope_nodes ( scope )

protected

The nodes of `scope`'s own body, not of the scopes nested in it.

_single_assignment()

preprocessor.iter_next_lowering._single_assignment ( node )

protected

`(name, value)` for a statement `name = value`, else `(None, None)`.

_uses()

preprocessor.iter_next_lowering._uses ( nodes, name )

protected

The `next(name)` calls among `nodes`, and every read of `name`.

lower_iter_next()

preprocessor.iter_next_lowering.lower_iter_next

(

module

)

Lowers iter()/next() pairs throughout `module` (#8284).

Variable Documentation

_SCOPES

tuple preprocessor.iter_next_lowering._SCOPES = (ast.FunctionDef, ast.AsyncFunctionDef, ast.Lambda, ast.ClassDef)

protected