Drop support for parsing Python 2 (#3933)

[etc/vim.git] / src / blib2to3 / pygram.py

diff --git a/src/blib2to3/pygram.py b/src/blib2to3/pygram.py
index c30c630e81685f905e104c3f56460dc00eae6f21..2b43b4c112b15c3c508767d6681129457d8a2805 100644 (file)
--- a/src/blib2to3/pygram.py
+++ b/src/blib2to3/pygram.py
@@ -63,7 +63,6 @@ class _python_symbols(Symbols):
     encoding_decl: int
     eval_input: int
     except_clause: int
     encoding_decl: int
     eval_input: int
     except_clause: int

-    exec_stmt: int

     expr: int
     expr_stmt: int
     exprlist: int
     expr: int
     expr_stmt: int
     exprlist: int


@@ -97,7 +96,6 @@ class _python_symbols(Symbols):
     pattern: int
     patterns: int
     power: int
     pattern: int
     patterns: int
     power: int

-    print_stmt: int

     raise_stmt: int
     return_stmt: int
     shift_expr: int
     raise_stmt: int
     return_stmt: int
     shift_expr: int


@@ -153,22 +151,16 @@ class _pattern_symbols(Symbols):
 
 
 python_grammar: Grammar
 
 
 python_grammar: Grammar

-python_grammar_no_print_statement: Grammar
-python_grammar_no_print_statement_no_exec_statement: Grammar
-python_grammar_no_print_statement_no_exec_statement_async_keywords: Grammar
-python_grammar_no_exec_statement: Grammar
-pattern_grammar: Grammar
+python_grammar_async_keywords: Grammar

 python_grammar_soft_keywords: Grammar
 python_grammar_soft_keywords: Grammar

-
+pattern_grammar: Grammar

 python_symbols: _python_symbols
 pattern_symbols: _pattern_symbols
 
 
 def initialize(cache_dir: Union[str, "os.PathLike[str]", None] = None) -> None:
     global python_grammar
 python_symbols: _python_symbols
 pattern_symbols: _pattern_symbols
 
 
 def initialize(cache_dir: Union[str, "os.PathLike[str]", None] = None) -> None:
     global python_grammar

-    global python_grammar_no_print_statement
-    global python_grammar_no_print_statement_no_exec_statement
-    global python_grammar_no_print_statement_no_exec_statement_async_keywords
+    global python_grammar_async_keywords

     global python_grammar_soft_keywords
     global python_symbols
     global pattern_grammar
     global python_grammar_soft_keywords
     global python_symbols
     global pattern_grammar


@@ -180,38 +172,25 @@ def initialize(cache_dir: Union[str, "os.PathLike[str]", None] = None) -> None:
         os.path.dirname(__file__), "PatternGrammar.txt"
     )
 
         os.path.dirname(__file__), "PatternGrammar.txt"
     )
 

-    # Python 2

     python_grammar = driver.load_packaged_grammar("blib2to3", _GRAMMAR_FILE, cache_dir)
     python_grammar = driver.load_packaged_grammar("blib2to3", _GRAMMAR_FILE, cache_dir)

-    python_grammar.version = (2, 0)
+    assert "print" not in python_grammar.keywords
+    assert "exec" not in python_grammar.keywords

 
     soft_keywords = python_grammar.soft_keywords.copy()
     python_grammar.soft_keywords.clear()
 
     python_symbols = _python_symbols(python_grammar)
 
 
     soft_keywords = python_grammar.soft_keywords.copy()
     python_grammar.soft_keywords.clear()
 
     python_symbols = _python_symbols(python_grammar)
 

-    # Python 2 + from __future__ import print_function
-    python_grammar_no_print_statement = python_grammar.copy()
-    del python_grammar_no_print_statement.keywords["print"]
-

     # Python 3.0-3.6
     # Python 3.0-3.6

-    python_grammar_no_print_statement_no_exec_statement = python_grammar.copy()
-    del python_grammar_no_print_statement_no_exec_statement.keywords["print"]
-    del python_grammar_no_print_statement_no_exec_statement.keywords["exec"]
-    python_grammar_no_print_statement_no_exec_statement.version = (3, 0)
+    python_grammar.version = (3, 0)

 
     # Python 3.7+
 
     # Python 3.7+

-    python_grammar_no_print_statement_no_exec_statement_async_keywords = (
-        python_grammar_no_print_statement_no_exec_statement.copy()
-    )
-    python_grammar_no_print_statement_no_exec_statement_async_keywords.async_keywords = (
-        True
-    )
-    python_grammar_no_print_statement_no_exec_statement_async_keywords.version = (3, 7)
+    python_grammar_async_keywords = python_grammar.copy()
+    python_grammar_async_keywords.async_keywords = True
+    python_grammar_async_keywords.version = (3, 7)

 
     # Python 3.10+
 
     # Python 3.10+

-    python_grammar_soft_keywords = (
-        python_grammar_no_print_statement_no_exec_statement_async_keywords.copy()
-    )
+    python_grammar_soft_keywords = python_grammar_async_keywords.copy()

     python_grammar_soft_keywords.soft_keywords = soft_keywords
     python_grammar_soft_keywords.version = (3, 10)
 
     python_grammar_soft_keywords.soft_keywords = soft_keywords
     python_grammar_soft_keywords.version = (3, 10)