else:
from typing import Final
-# lib2to3 fork
-from blib2to3.pytree import Node, Leaf
+from black.mode import VERSION_TO_FEATURES, Feature, TargetVersion, supports_feature
+from black.nodes import syms
from blib2to3 import pygram
from blib2to3.pgen2 import driver
from blib2to3.pgen2.grammar import Grammar
from blib2to3.pgen2.parse import ParseError
from blib2to3.pgen2.tokenize import TokenError
-
-from black.mode import TargetVersion, Feature, supports_feature
-from black.nodes import syms
+from blib2to3.pytree import Leaf, Node
ast3: Any
try:
from typed_ast import ast3
except ImportError:
- # Either our python version is too low, or we're on pypy
- if sys.version_info < (3, 7) or (sys.version_info < (3, 8) and not _IS_PYPY):
+ if sys.version_info < (3, 8) and not _IS_PYPY:
print(
- "The typed_ast package is required but not installed.\n"
- "You can upgrade to Python 3.8+ or install typed_ast with\n"
- "`python3 -m pip install typed-ast`.",
+ (
+ "The typed_ast package is required but not installed.\n"
+ "You can upgrade to Python 3.8+ or install typed_ast with\n"
+ "`python3 -m pip install typed-ast`."
+ ),
file=sys.stderr,
)
sys.exit(1)
ast3 = ast
-PY310_HINT: Final = "Consider using --target-version py310 to parse Python 3.10 code."
PY2_HINT: Final = "Python 2 support was removed in version 22.0."
if not target_versions:
# No target_version specified, so try all grammars.
return [
- # Python 3.7+
+ # Python 3.7-3.9
pygram.python_grammar_no_print_statement_no_exec_statement_async_keywords,
# Python 3.0-3.6
pygram.python_grammar_no_print_statement_no_exec_statement,
+ # Python 3.10+
+ pygram.python_grammar_soft_keywords,
]
grammars = []
- if supports_feature(target_versions, Feature.PATTERN_MATCHING):
- # Python 3.10+
- grammars.append(pygram.python_grammar_soft_keywords)
# If we have to parse both, try to parse async as a keyword first
if not supports_feature(
target_versions, Feature.ASYNC_IDENTIFIERS
if not supports_feature(target_versions, Feature.ASYNC_KEYWORDS):
# Python 3.0-3.6
grammars.append(pygram.python_grammar_no_print_statement_no_exec_statement)
+ if any(Feature.PATTERN_MATCHING in VERSION_TO_FEATURES[v] for v in target_versions):
+ # Python 3.10+
+ grammars.append(pygram.python_grammar_soft_keywords)
+
# At least one of the above branches must have been taken, because every Python
# version has exactly one of the two 'ASYNC_*' flags
return grammars
src_txt += "\n"
grammars = get_grammars(set(target_versions))
+ errors = {}
for grammar in grammars:
drv = driver.Driver(grammar)
try:
faulty_line = lines[lineno - 1]
except IndexError:
faulty_line = "<line number missing in source>"
- exc = InvalidInput(f"Cannot parse: {lineno}:{column}: {faulty_line}")
+ errors[grammar.version] = InvalidInput(
+ f"Cannot parse: {lineno}:{column}: {faulty_line}"
+ )
except TokenError as te:
# In edge cases these are raised; and typically don't have a "faulty_line".
lineno, column = te.args[1]
- exc = InvalidInput(f"Cannot parse: {lineno}:{column}: {te.args[0]}")
+ errors[grammar.version] = InvalidInput(
+ f"Cannot parse: {lineno}:{column}: {te.args[0]}"
+ )
else:
- if pygram.python_grammar_soft_keywords not in grammars and matches_grammar(
- src_txt, pygram.python_grammar_soft_keywords
- ):
- original_msg = exc.args[0]
- msg = f"{original_msg}\n{PY310_HINT}"
- raise InvalidInput(msg) from None
+ # Choose the latest version when raising the actual parsing error.
+ assert len(errors) >= 1
+ exc = errors[max(errors)]
if matches_grammar(src_txt, pygram.python_grammar) or matches_grammar(
src_txt, pygram.python_grammar_no_print_statement
def parse_single_version(
- src: str, version: Tuple[int, int]
+ src: str, version: Tuple[int, int], *, type_comments: bool
) -> Union[ast.AST, ast3.AST]:
filename = "<unknown>"
- # typed_ast is needed because of feature version limitations in the builtin ast
+ # typed-ast is needed because of feature version limitations in the builtin ast 3.8>
if sys.version_info >= (3, 8) and version >= (3,):
- return ast.parse(src, filename, feature_version=version)
- elif version >= (3,):
- if _IS_PYPY:
- return ast3.parse(src, filename)
+ return ast.parse(
+ src, filename, feature_version=version, type_comments=type_comments
+ )
+
+ if _IS_PYPY:
+ # PyPy 3.7 doesn't support type comment tracking which is not ideal, but there's
+ # not much we can do as typed-ast won't work either.
+ if sys.version_info >= (3, 8):
+ return ast3.parse(src, filename, type_comments=type_comments)
else:
+ return ast3.parse(src, filename)
+ else:
+ if type_comments:
+ # Typed-ast is guaranteed to be used here and automatically tracks type
+ # comments separately.
return ast3.parse(src, filename, feature_version=version[1])
- raise AssertionError("INTERNAL ERROR: Tried parsing unsupported Python version!")
+ else:
+ return ast.parse(src, filename)
def parse_ast(src: str) -> Union[ast.AST, ast3.AST]:
first_error = ""
for version in sorted(versions, reverse=True):
try:
- return parse_single_version(src, version)
+ return parse_single_version(src, version, type_comments=True)
except SyntaxError as e:
if not first_error:
first_error = str(e)
+ # Try to parse without type comments
+ for version in sorted(versions, reverse=True):
+ try:
+ return parse_single_version(src, version, type_comments=False)
+ except SyntaxError:
+ pass
+
raise SyntaxError(first_error)
and isinstance(node, (ast.Delete, ast3.Delete))
and isinstance(item, (ast.Tuple, ast3.Tuple))
):
- for item in item.elts:
- yield from stringify_ast(item, depth + 2)
+ for elt in item.elts:
+ yield from stringify_ast(elt, depth + 2)
elif isinstance(item, (ast.AST, ast3.AST)):
yield from stringify_ast(item, depth + 2)
projects / etc / vim.git / blobdiff