mirror of
https://github.com/PiBrewing/craftbeerpi4.git
synced 2024-11-10 01:17:42 +01:00
131 lines
3.3 KiB
Python
131 lines
3.3 KiB
Python
import ast
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from collections import namedtuple
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from functools import partial
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from typing import Optional
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import sys
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import astroid
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_ast_py3 = None
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try:
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import typed_ast.ast3 as _ast_py3
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except ImportError:
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pass
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PY38 = sys.version_info[:2] >= (3, 8)
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if PY38:
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# On Python 3.8, typed_ast was merged back into `ast`
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_ast_py3 = ast
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FunctionType = namedtuple("FunctionType", ["argtypes", "returns"])
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class ParserModule(
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namedtuple(
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"ParserModule",
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[
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"module",
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"unary_op_classes",
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"cmp_op_classes",
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"bool_op_classes",
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"bin_op_classes",
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"context_classes",
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],
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)
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):
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def parse(self, string: str, type_comments=True):
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if self.module is _ast_py3:
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if PY38:
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parse_func = partial(self.module.parse, type_comments=type_comments)
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else:
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parse_func = partial(
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self.module.parse, feature_version=sys.version_info.minor
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)
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else:
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parse_func = self.module.parse
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return parse_func(string)
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def parse_function_type_comment(type_comment: str) -> Optional[FunctionType]:
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"""Given a correct type comment, obtain a FunctionType object"""
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if _ast_py3 is None:
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return None
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func_type = _ast_py3.parse(type_comment, "<type_comment>", "func_type")
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return FunctionType(argtypes=func_type.argtypes, returns=func_type.returns)
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def get_parser_module(type_comments=True) -> ParserModule:
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if not type_comments:
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parser_module = ast
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else:
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parser_module = _ast_py3
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parser_module = parser_module or ast
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unary_op_classes = _unary_operators_from_module(parser_module)
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cmp_op_classes = _compare_operators_from_module(parser_module)
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bool_op_classes = _bool_operators_from_module(parser_module)
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bin_op_classes = _binary_operators_from_module(parser_module)
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context_classes = _contexts_from_module(parser_module)
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return ParserModule(
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parser_module,
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unary_op_classes,
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cmp_op_classes,
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bool_op_classes,
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bin_op_classes,
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context_classes,
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)
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def _unary_operators_from_module(module):
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return {module.UAdd: "+", module.USub: "-", module.Not: "not", module.Invert: "~"}
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def _binary_operators_from_module(module):
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binary_operators = {
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module.Add: "+",
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module.BitAnd: "&",
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module.BitOr: "|",
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module.BitXor: "^",
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module.Div: "/",
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module.FloorDiv: "//",
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module.MatMult: "@",
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module.Mod: "%",
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module.Mult: "*",
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module.Pow: "**",
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module.Sub: "-",
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module.LShift: "<<",
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module.RShift: ">>",
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}
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return binary_operators
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def _bool_operators_from_module(module):
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return {module.And: "and", module.Or: "or"}
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def _compare_operators_from_module(module):
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return {
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module.Eq: "==",
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module.Gt: ">",
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module.GtE: ">=",
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module.In: "in",
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module.Is: "is",
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module.IsNot: "is not",
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module.Lt: "<",
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module.LtE: "<=",
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module.NotEq: "!=",
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module.NotIn: "not in",
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}
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def _contexts_from_module(module):
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return {
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module.Load: astroid.Load,
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module.Store: astroid.Store,
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module.Del: astroid.Del,
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module.Param: astroid.Store,
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}
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