"""
import sys
-from typing import (
- Generic,
- Iterator,
- List,
- Optional,
- Set,
- Tuple,
- TypeVar,
- Union,
-)
+from typing import Generic, Iterator, List, Optional, Set, Tuple, TypeVar, Union
if sys.version_info >= (3, 8):
from typing import Final
from mypy_extensions import mypyc_attr
-# lib2to3 fork
-from blib2to3.pytree import Node, Leaf, type_repr, NL
-from blib2to3 import pygram
-from blib2to3.pgen2 import token
-
from black.cache import CACHE_DIR
from black.strings import has_triple_quotes
-
+from blib2to3 import pygram
+from blib2to3.pgen2 import token
+from blib2to3.pytree import NL, Leaf, Node, type_repr
pygram.initialize(CACHE_DIR)
syms: Final = pygram.python_symbols
return container
-def first_leaf_column(node: Node) -> Optional[int]:
- """Returns the column of the first leaf child of a node."""
- for child in node.children:
- if isinstance(child, Leaf):
- return child.column
- return None
+def first_leaf_of(node: LN) -> Optional[Leaf]:
+ """Returns the first leaf of the node tree."""
+ if isinstance(node, Leaf):
+ return node
+ if node.children:
+ return first_leaf_of(node.children[0])
+ else:
+ return None
def is_arith_like(node: LN) -> bool:
def is_string_token(nl: NL) -> TypeGuard[Leaf]:
return nl.type == token.STRING
+
+
+def is_number_token(nl: NL) -> TypeGuard[Leaf]:
+ return nl.type == token.NUMBER
+
+
+def is_part_of_annotation(leaf: Leaf) -> bool:
+ """Returns whether this leaf is part of type annotations."""
+ ancestor = leaf.parent
+ while ancestor is not None:
+ if ancestor.prev_sibling and ancestor.prev_sibling.type == token.RARROW:
+ return True
+ if ancestor.parent and ancestor.parent.type == syms.tname:
+ return True
+ ancestor = ancestor.parent
+ return False