Fix spurious extra spaces after opening parentheses and in default arguments

[etc/vim.git] / black.py

diff --git a/black.py b/black.py
index 24c57ca4aee1d54ae862e8e879a4d27f9577f029..75fbdcadd41159f0b38446288f1b05c5f1408995 100644 (file)
--- a/black.py
+++ b/black.py
@@ -20,7 +20,7 @@ from blib2to3 import pygram, pytree
 from blib2to3.pgen2 import driver, token
 from blib2to3.pgen2.parse import ParseError
 
-__version__ = "18.3a0"
+__version__ = "18.3a1"
 DEFAULT_LINE_LENGTH = 88
 # types
 syms = pygram.python_symbols
@@ -358,7 +358,7 @@ class BracketTracker:
         """Returns True if there is an yet unmatched open bracket on the line."""
         return bool(self.bracket_match)
 
-    def max_priority(self, exclude: Iterable[LeafID] = ()) -> int:
+    def max_priority(self, exclude: Iterable[LeafID] =()) -> int:
         """Returns the highest priority of a delimiter found on the line.
 
         Values are consistent with what `is_delimiter()` returns.
@@ -765,6 +765,7 @@ def whitespace(leaf: Leaf) -> str:
     DOUBLESPACE = '  '
     t = leaf.type
     p = leaf.parent
+    v = leaf.value
     if t == token.COLON:
         return NO
 
@@ -780,13 +781,48 @@ def whitespace(leaf: Leaf) -> str:
     if t == STANDALONE_COMMENT:
         return NO
 
+    if t in CLOSING_BRACKETS:
+        return NO
+
     assert p is not None, f"INTERNAL ERROR: hand-made leaf without parent: {leaf!r}"
+    prev = leaf.prev_sibling
+    if not prev:
+        prevp = preceding_leaf(p)
+        if not prevp or prevp.type in OPENING_BRACKETS:
+            return NO
+
+        if prevp.type == token.EQUAL:
+            if prevp.parent and prevp.parent.type in {
+                syms.typedargslist,
+                syms.varargslist,
+                syms.parameters,
+                syms.arglist,
+                syms.argument,
+            }:
+                return NO
+
+        elif prevp.type == token.DOUBLESTAR:
+            if prevp.parent and prevp.parent.type in {
+                syms.typedargslist,
+                syms.varargslist,
+                syms.parameters,
+                syms.arglist,
+                syms.dictsetmaker,
+            }:
+                return NO
+
+        elif prevp.type == token.COLON:
+            if prevp.parent and prevp.parent.type == syms.subscript:
+                return NO
+
+    elif prev.type in OPENING_BRACKETS:
+        return NO
+
     if p.type in {syms.parameters, syms.arglist}:
         # untyped function signatures or calls
         if t == token.RPAR:
             return NO
 
-        prev = leaf.prev_sibling
         if not prev or prev.type != token.COMMA:
             return NO
 
@@ -795,13 +831,11 @@ def whitespace(leaf: Leaf) -> str:
         if t == token.RPAR:
             return NO
 
-        prev = leaf.prev_sibling
         if prev and prev.type != token.COMMA:
             return NO
 
     elif p.type == syms.typedargslist:
         # typed function signatures
-        prev = leaf.prev_sibling
         if not prev:
             return NO
 
@@ -819,7 +853,6 @@ def whitespace(leaf: Leaf) -> str:
 
     elif p.type == syms.tname:
         # type names
-        prev = leaf.prev_sibling
         if not prev:
             prevp = preceding_leaf(p)
             if not prevp or prevp.type != token.COMMA:
@@ -830,7 +863,6 @@ def whitespace(leaf: Leaf) -> str:
         if t == token.LPAR or t == token.RPAR:
             return NO
 
-        prev = leaf.prev_sibling
         if not prev:
             if t == token.DOT:
                 prevp = preceding_leaf(p)
@@ -848,7 +880,6 @@ def whitespace(leaf: Leaf) -> str:
         if t == token.EQUAL:
             return NO
 
-        prev = leaf.prev_sibling
         if not prev:
             prevp = preceding_leaf(p)
             if not prevp or prevp.type == token.LPAR:
@@ -862,88 +893,27 @@ def whitespace(leaf: Leaf) -> str:
         return NO
 
     elif p.type == syms.dotted_name:
-        prev = leaf.prev_sibling
         if prev:
             return NO
 
         prevp = preceding_leaf(p)
-        if not prevp or prevp.type == token.AT:
+        if not prevp or prevp.type == token.AT or prevp.type == token.DOT:
             return NO
 
     elif p.type == syms.classdef:
         if t == token.LPAR:
             return NO
 
-        prev = leaf.prev_sibling
         if prev and prev.type == token.LPAR:
             return NO
 
     elif p.type == syms.subscript:
         # indexing
-        if t == token.COLON:
-            return NO
-
-        prev = leaf.prev_sibling
         if not prev or prev.type == token.COLON:
             return NO
 
-    elif p.type in {
-        syms.test,
-        syms.not_test,
-        syms.xor_expr,
-        syms.or_test,
-        syms.and_test,
-        syms.arith_expr,
-        syms.shift_expr,
-        syms.yield_expr,
-        syms.term,
-        syms.power,
-        syms.comparison,
-    }:
-        # various arithmetic and logic expressions
-        prev = leaf.prev_sibling
-        if not prev:
-            prevp = preceding_leaf(p)
-            if not prevp or prevp.type in OPENING_BRACKETS:
-                return NO
-
-            if prevp.type == token.EQUAL:
-                if prevp.parent and prevp.parent.type in {
-                    syms.varargslist, syms.parameters, syms.arglist, syms.argument
-                }:
-                    return NO
-
-        return SPACE
-
     elif p.type == syms.atom:
-        if t in CLOSING_BRACKETS:
-            return NO
-
-        prev = leaf.prev_sibling
-        if not prev:
-            prevp = preceding_leaf(p)
-            if not prevp:
-                return NO
-
-            if prevp.type in OPENING_BRACKETS:
-                return NO
-
-            if prevp.type == token.EQUAL:
-                if prevp.parent and prevp.parent.type in {
-                    syms.varargslist, syms.parameters, syms.arglist, syms.argument
-                }:
-                    return NO
-
-            if prevp.type == token.DOUBLESTAR:
-                if prevp.parent and prevp.parent.type in {
-                    syms.varargslist, syms.parameters, syms.arglist, syms.dictsetmaker
-                }:
-                    return NO
-
-        elif prev.type in OPENING_BRACKETS:
-            return NO
-
-        elif t == token.DOT:
+        if prev and t == token.DOT:
             # dots, but not the first one.
             return NO
 
@@ -953,13 +923,11 @@ def whitespace(leaf: Leaf) -> str:
         p.type == syms.subscriptlist
     ):
         # list interior, including unpacking
-        prev = leaf.prev_sibling
         if not prev:
             return NO
 
     elif p.type == syms.dictsetmaker:
         # dict and set interior, including unpacking
-        prev = leaf.prev_sibling
         if not prev:
             return NO
 
@@ -968,7 +936,6 @@ def whitespace(leaf: Leaf) -> str:
 
     elif p.type == syms.factor or p.type == syms.star_expr:
         # unary ops
-        prev = leaf.prev_sibling
         if not prev:
             prevp = preceding_leaf(p)
             if not prevp or prevp.type in OPENING_BRACKETS:
@@ -987,10 +954,17 @@ def whitespace(leaf: Leaf) -> str:
         elif t == token.NAME or t == token.NUMBER:
             return NO
 
-    elif p.type == syms.import_from and t == token.NAME:
-        prev = leaf.prev_sibling
-        if prev and prev.type == token.DOT:
-            return NO
+    elif p.type == syms.import_from:
+        if t == token.DOT:
+            if prev and prev.type == token.DOT:
+                return NO
+
+        elif t == token.NAME:
+            if v == 'import':
+                return SPACE
+
+            if prev and prev.type == token.DOT:
+                return NO
 
     elif p.type == syms.sliceop:
         return NO