Support 3.11 / PEP 654 syntax (#3016)

[etc/vim.git] / src / blib2to3 / pgen2 / pgen.py

diff --git a/src/blib2to3/pgen2/pgen.py b/src/blib2to3/pgen2/pgen.py
index 13ec51d1878f51bd73d9d09778dc5a5a4726ea6c..631682a77c9b65654ddf8cd90579fa4337895a99 100644 (file)
--- a/src/blib2to3/pgen2/pgen.py
+++ b/src/blib2to3/pgen2/pgen.py
@@ -8,7 +8,6 @@ from typing import (
     Any,
     Dict,
     IO,
     Any,
     Dict,
     IO,

-    Iterable,

     Iterator,
     List,
     Optional,
     Iterator,
     List,
     Optional,


@@ -116,12 +115,17 @@ class ParserGenerator(object):
             assert label[0] in ('"', "'"), label
             value = eval(label)
             if value[0].isalpha():
             assert label[0] in ('"', "'"), label
             value = eval(label)
             if value[0].isalpha():

+                if label[0] == '"':
+                    keywords = c.soft_keywords
+                else:
+                    keywords = c.keywords
+

                 # A keyword
                 # A keyword

-                if value in c.keywords:
-                    return c.keywords[value]
+                if value in keywords:
+                    return keywords[value]

                 else:
                     c.labels.append((token.NAME, value))
                 else:
                     c.labels.append((token.NAME, value))

-                    c.keywords[value] = ilabel
+                    keywords[value] = ilabel

                     return ilabel
             else:
                 # An operator (any non-numeric token)
                     return ilabel
             else:
                 # An operator (any non-numeric token)


@@ -168,8 +172,7 @@ class ParserGenerator(object):
                 if symbol in inverse:
                     raise ValueError(
                         "rule %s is ambiguous; %s is in the first sets of %s as well"
                 if symbol in inverse:
                     raise ValueError(
                         "rule %s is ambiguous; %s is in the first sets of %s as well"

-                        " as %s"
-                        % (name, symbol, label, inverse[symbol])
+                        " as %s" % (name, symbol, label, inverse[symbol])

                     )
                 inverse[symbol] = label
         self.first[name] = totalset
                     )
                 inverse[symbol] = label
         self.first[name] = totalset