Fix arithmetic stability issue (#2817)

[etc/vim.git] / src / black / nodes.py

diff --git a/src/black/nodes.py b/src/black/nodes.py
index 8bf1934bc2aec77fe33aea205c915bdeabb907e6..7466670be5a9864669790b0bd6948217441c435b 100644 (file)
--- a/src/black/nodes.py
+++ b/src/black/nodes.py
@@ -19,11 +19,15 @@ if sys.version_info >= (3, 8):
     from typing import Final
 else:
     from typing_extensions import Final
     from typing import Final
 else:
     from typing_extensions import Final

+if sys.version_info >= (3, 10):
+    from typing import TypeGuard
+else:
+    from typing_extensions import TypeGuard

 
 from mypy_extensions import mypyc_attr
 
 # lib2to3 fork
 
 from mypy_extensions import mypyc_attr
 
 # lib2to3 fork

-from blib2to3.pytree import Node, Leaf, type_repr
+from blib2to3.pytree import Node, Leaf, type_repr, NL

 from blib2to3 import pygram
 from blib2to3.pgen2 import token
 
 from blib2to3 import pygram
 from blib2to3.pgen2 import token
 


@@ -255,16 +259,6 @@ def whitespace(leaf: Leaf, *, complex_subscript: bool) -> str:  # noqa: C901
         ):
             return NO
 
         ):
             return NO
 

-        elif (
-            prevp.type == token.RIGHTSHIFT
-            and prevp.parent
-            and prevp.parent.type == syms.shift_expr
-            and prevp.prev_sibling
-            and prevp.prev_sibling.type == token.NAME
-            and prevp.prev_sibling.value == "print"  # type: ignore
-        ):
-            # Python 2 print chevron
-            return NO

         elif prevp.type == token.AT and p.parent and p.parent.type == syms.decorator:
             # no space in decorators
             return NO
         elif prevp.type == token.AT and p.parent and p.parent.type == syms.decorator:
             # no space in decorators
             return NO


@@ -312,12 +306,7 @@ def whitespace(leaf: Leaf, *, complex_subscript: bool) -> str:  # noqa: C901
             return NO
 
         if not prev:
             return NO
 
         if not prev:

-            if t == token.DOT:
-                prevp = preceding_leaf(p)
-                if not prevp or prevp.type != token.NUMBER:
-                    return NO
-
-            elif t == token.LSQB:
+            if t == token.DOT or t == token.LSQB:

                 return NO
 
         elif prev.type != token.COMMA:
                 return NO
 
         elif prev.type != token.COMMA:


@@ -542,15 +531,14 @@ def first_leaf_column(node: Node) -> Optional[int]:
     return None
 
 
     return None
 
 

-def first_child_is_arith(node: Node) -> bool:
-    """Whether first child is an arithmetic or a binary arithmetic expression"""
-    expr_types = {
+def is_arith_like(node: LN) -> bool:
+    """Whether node is an arithmetic or a binary arithmetic expression"""
+    return node.type in {

         syms.arith_expr,
         syms.shift_expr,
         syms.xor_expr,
         syms.and_expr,
     }
         syms.arith_expr,
         syms.shift_expr,
         syms.xor_expr,
         syms.and_expr,
     }

-    return bool(node.children and node.children[0].type in expr_types)

 
 
 def is_docstring(leaf: Leaf) -> bool:
 
 
 def is_docstring(leaf: Leaf) -> bool:


@@ -687,7 +675,7 @@ def is_yield(node: LN) -> bool:
     if node.type == syms.yield_expr:
         return True
 
     if node.type == syms.yield_expr:
         return True
 

-    if node.type == token.NAME and node.value == "yield":  # type: ignore
+    if is_name_token(node) and node.value == "yield":

         return True
 
     if node.type != syms.atom:
         return True
 
     if node.type != syms.atom:


@@ -854,3 +842,19 @@ def ensure_visible(leaf: Leaf) -> None:
         leaf.value = "("
     elif leaf.type == token.RPAR:
         leaf.value = ")"
         leaf.value = "("
     elif leaf.type == token.RPAR:
         leaf.value = ")"

+
+
+def is_name_token(nl: NL) -> TypeGuard[Leaf]:
+    return nl.type == token.NAME
+
+
+def is_lpar_token(nl: NL) -> TypeGuard[Leaf]:
+    return nl.type == token.LPAR
+
+
+def is_rpar_token(nl: NL) -> TypeGuard[Leaf]:
+    return nl.type == token.RPAR
+
+
+def is_string_token(nl: NL) -> TypeGuard[Leaf]:
+    return nl.type == token.STRING