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from black.nodes import ASSIGNMENTS, OPENING_BRACKETS, CLOSING_BRACKETS
from black.nodes import Visitor, syms, first_child_is_arith, ensure_visible
from black.nodes import is_docstring, is_empty_tuple, is_one_tuple, is_one_tuple_between
from black.nodes import ASSIGNMENTS, OPENING_BRACKETS, CLOSING_BRACKETS
from black.nodes import Visitor, syms, first_child_is_arith, ensure_visible
from black.nodes import is_docstring, is_empty_tuple, is_one_tuple, is_one_tuple_between
+from black.nodes import is_name_token, is_lpar_token, is_rpar_token
from black.nodes import is_walrus_assignment, is_yield, is_vararg, is_multiline_string
from black.nodes import is_stub_suite, is_stub_body, is_atom_with_invisible_parens
from black.nodes import wrap_in_parentheses
from black.nodes import is_walrus_assignment, is_yield, is_vararg, is_multiline_string
from black.nodes import is_stub_suite, is_stub_body, is_atom_with_invisible_parens
from black.nodes import wrap_in_parentheses
from black.numerics import normalize_numeric_literal
from black.strings import get_string_prefix, fix_docstring
from black.strings import normalize_string_prefix, normalize_string_quotes
from black.numerics import normalize_numeric_literal
from black.strings import get_string_prefix, fix_docstring
from black.strings import normalize_string_prefix, normalize_string_quotes
-from black.trans import Transformer, CannotTransform, StringMerger
-from black.trans import StringSplitter, StringParenWrapper, StringParenStripper
-from black.mode import Mode
-from black.mode import Feature
+from black.trans import Transformer, CannotTransform, StringMerger, StringSplitter
+from black.trans import StringParenWrapper, StringParenStripper, hug_power_op
+from black.mode import Mode, Feature, Preview
from blib2to3.pytree import Node, Leaf
from blib2to3.pgen2 import token
from blib2to3.pytree import Node, Leaf
from blib2to3.pgen2 import token
in ways that will no longer stringify to valid Python code on the tree.
"""
in ways that will no longer stringify to valid Python code on the tree.
"""
- def __init__(self, mode: Mode, remove_u_prefix: bool = False ) -> None:
+ def __init__(self, mode: Mode) -> None:
- self.remove_u_prefix = remove_u_prefix
self.current_line: Line
self.__post_init__()
self.current_line: Line
self.__post_init__()
normalize_prefix(node, inside_brackets=any_open_brackets)
if self.mode.string_normalization and node.type == token.STRING:
normalize_prefix(node, inside_brackets=any_open_brackets)
if self.mode.string_normalization and node.type == token.STRING:
- node.value = normalize_string_prefix(
- node.value, remove_u_prefix=self.remove_u_prefix
- )
+ node.value = normalize_string_prefix(node.value)
node.value = normalize_string_quotes(node.value)
if node.type == token.NUMBER:
normalize_numeric_literal(node)
node.value = normalize_string_quotes(node.value)
if node.type == token.NUMBER:
normalize_numeric_literal(node)
"""Visit a statement.
This implementation is shared for `if`, `while`, `for`, `try`, `except`,
"""Visit a statement.
This implementation is shared for `if`, `while`, `for`, `try`, `except`,
- `def`, `with`, `class`, `assert`, `match`, `case` and assignments.
+ `def`, `with`, `class`, `assert`, and assignments.
The relevant Python language `keywords` for a given statement will be
NAME leaves within it. This methods puts those on a separate line.
The relevant Python language `keywords` for a given statement will be
NAME leaves within it. This methods puts those on a separate line.
"""
normalize_invisible_parens(node, parens_after=parens)
for child in node.children:
"""
normalize_invisible_parens(node, parens_after=parens)
for child in node.children:
- if child.type == token.NAME and child.value in keywords: # type: ignore
+ if is_name_token(child) and child.value in keywords:
yield from self.line()
yield from self.visit(child)
yield from self.line()
yield from self.visit(child)
+ def visit_match_case(self, node: Node) -> Iterator[Line]:
+ """Visit either a match or case statement."""
+ normalize_invisible_parens(node, parens_after=set())
+
+ yield from self.line()
+ for child in node.children:
+ yield from self.visit(child)
+
def visit_suite(self, node: Node) -> Iterator[Line]:
"""Visit a suite."""
if self.mode.is_pyi and is_stub_suite(node):
def visit_suite(self, node: Node) -> Iterator[Line]:
"""Visit a suite."""
if self.mode.is_pyi and is_stub_suite(node):
if is_docstring(leaf) and "\\\n" not in leaf.value:
# We're ignoring docstrings with backslash newline escapes because changing
# indentation of those changes the AST representation of the code.
if is_docstring(leaf) and "\\\n" not in leaf.value:
# We're ignoring docstrings with backslash newline escapes because changing
# indentation of those changes the AST representation of the code.
- docstring = normalize_string_prefix(leaf.value, self.remove_u_prefix )
+ docstring = normalize_string_prefix(leaf.value)
prefix = get_string_prefix(docstring)
docstring = docstring[len(prefix) :] # Remove the prefix
quote_char = docstring[0]
prefix = get_string_prefix(docstring)
docstring = docstring[len(prefix) :] # Remove the prefix
quote_char = docstring[0]
self.visit_decorated = self.visit_decorators
# PEP 634
self.visit_decorated = self.visit_decorators
# PEP 634
- self.visit_match_stmt = partial(v, keywords={"match"}, parens=Ø)
- self.visit_case_block = partial(v, keywords={"case"}, parens=Ø)
+ self.visit_match_stmt = self.visit_match_case
+ self.visit_case_block = self.visit_match_case
and not (line.inside_brackets and line.contains_standalone_comments())
):
# Only apply basic string preprocessing, since lines shouldn't be split here.
and not (line.inside_brackets and line.contains_standalone_comments())
):
# Only apply basic string preprocessing, since lines shouldn't be split here.
- if mode.experimental_string_processing :
+ if Preview.string_processing in mode :
transformers = [string_merge, string_paren_strip]
else:
transformers = []
transformers = [string_merge, string_paren_strip]
else:
transformers = []
# via type ... https://github.com/mypyc/mypyc/issues/884
rhs = type("rhs", (), {"__call__": _rhs})()
# via type ... https://github.com/mypyc/mypyc/issues/884
rhs = type("rhs", (), {"__call__": _rhs})()
- if mode.experimental_string_processing :
+ if Preview.string_processing in mode :
if line.inside_brackets:
transformers = [
string_merge,
if line.inside_brackets:
transformers = [
string_merge,
transformers = [delimiter_split, standalone_comment_split, rhs]
else:
transformers = [rhs]
transformers = [delimiter_split, standalone_comment_split, rhs]
else:
transformers = [rhs]
+ # It's always safe to attempt hugging of power operations and pretty much every line
+ # could match.
+ transformers.append(hug_power_op)
for transform in transformers:
# We are accumulating lines in `result` because we might want to abort
for transform in transformers:
# We are accumulating lines in `result` because we might want to abort
elif node.type == syms.import_from:
# "import from" nodes store parentheses directly as part of
# the statement
elif node.type == syms.import_from:
# "import from" nodes store parentheses directly as part of
# the statement
- if child.type == token.LPAR:
+ if is_lpar_token(child):
+ assert is_rpar_token(node.children[-1])
# make parentheses invisible
# make parentheses invisible
- child.value = "" # type: ignore
- node.children[-1].value = "" # type: ignore
+ child.value = ""
+ node.children[-1].value = ""
elif child.type != token.STAR:
# insert invisible parentheses
node.insert_child(index, Leaf(token.LPAR, ""))
elif child.type != token.STAR:
# insert invisible parentheses
node.insert_child(index, Leaf(token.LPAR, ""))
first = node.children[0]
last = node.children[-1]
first = node.children[0]
last = node.children[-1]
- if first.type == token.LPAR and last.type == token.RPAR :
+ if is_lpar_token(first) and is_rpar_token(last) :
middle = node.children[1]
# make parentheses invisible
middle = node.children[1]
# make parentheses invisible
- first.value = "" # type: ignore
- last.value = "" # type: ignore
+ first.value = ""
+ last.value = ""
maybe_make_parens_invisible_in_atom(middle, parent=parent)
if is_atom_with_invisible_parens(middle):
maybe_make_parens_invisible_in_atom(middle, parent=parent)
if is_atom_with_invisible_parens(middle):
if (
prev
and prev.type == token.COMMA
if (
prev
and prev.type == token.COMMA
+ and leaf.opening_bracket is not None
and not is_one_tuple_between(
leaf.opening_bracket, leaf, line.leaves
)
and not is_one_tuple_between(
leaf.opening_bracket, leaf, line.leaves
)
if (
prev
and prev.type == token.COMMA
if (
prev
and prev.type == token.COMMA
+ and leaf.opening_bracket is not None
and not is_one_tuple_between(leaf.opening_bracket, leaf, line.leaves)
):
# Never omit bracket pairs with trailing commas.
and not is_one_tuple_between(leaf.opening_bracket, leaf, line.leaves)
):
# Never omit bracket pairs with trailing commas.
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