| # Licensed under the LGPL: https://www.gnu.org/licenses/old-licenses/lgpl-2.1.en.html |
| # For details: https://github.com/pylint-dev/astroid/blob/main/LICENSE |
| # Copyright (c) https://github.com/pylint-dev/astroid/blob/main/CONTRIBUTORS.txt |
| |
| from __future__ import annotations |
| |
| import ast |
| from typing import NamedTuple |
| |
| from astroid.const import Context |
| |
| |
| class FunctionType(NamedTuple): |
| argtypes: list[ast.expr] |
| returns: ast.expr |
| |
| |
| class ParserModule(NamedTuple): |
| unary_op_classes: dict[type[ast.unaryop], str] |
| cmp_op_classes: dict[type[ast.cmpop], str] |
| bool_op_classes: dict[type[ast.boolop], str] |
| bin_op_classes: dict[type[ast.operator], str] |
| context_classes: dict[type[ast.expr_context], Context] |
| |
| def parse( |
| self, string: str, type_comments: bool = True, filename: str | None = None |
| ) -> ast.Module: |
| if filename: |
| return ast.parse(string, filename=filename, type_comments=type_comments) |
| return ast.parse(string, type_comments=type_comments) |
| |
| |
| def parse_function_type_comment(type_comment: str) -> FunctionType | None: |
| """Given a correct type comment, obtain a FunctionType object.""" |
| func_type = ast.parse(type_comment, "<type_comment>", "func_type") # type: ignore[attr-defined] |
| return FunctionType(argtypes=func_type.argtypes, returns=func_type.returns) |
| |
| |
| def get_parser_module(type_comments: bool = True) -> ParserModule: |
| unary_op_classes = _unary_operators_from_module() |
| cmp_op_classes = _compare_operators_from_module() |
| bool_op_classes = _bool_operators_from_module() |
| bin_op_classes = _binary_operators_from_module() |
| context_classes = _contexts_from_module() |
| |
| return ParserModule( |
| unary_op_classes, |
| cmp_op_classes, |
| bool_op_classes, |
| bin_op_classes, |
| context_classes, |
| ) |
| |
| |
| def _unary_operators_from_module() -> dict[type[ast.unaryop], str]: |
| return {ast.UAdd: "+", ast.USub: "-", ast.Not: "not", ast.Invert: "~"} |
| |
| |
| def _binary_operators_from_module() -> dict[type[ast.operator], str]: |
| return { |
| ast.Add: "+", |
| ast.BitAnd: "&", |
| ast.BitOr: "|", |
| ast.BitXor: "^", |
| ast.Div: "/", |
| ast.FloorDiv: "//", |
| ast.MatMult: "@", |
| ast.Mod: "%", |
| ast.Mult: "*", |
| ast.Pow: "**", |
| ast.Sub: "-", |
| ast.LShift: "<<", |
| ast.RShift: ">>", |
| } |
| |
| |
| def _bool_operators_from_module() -> dict[type[ast.boolop], str]: |
| return {ast.And: "and", ast.Or: "or"} |
| |
| |
| def _compare_operators_from_module() -> dict[type[ast.cmpop], str]: |
| return { |
| ast.Eq: "==", |
| ast.Gt: ">", |
| ast.GtE: ">=", |
| ast.In: "in", |
| ast.Is: "is", |
| ast.IsNot: "is not", |
| ast.Lt: "<", |
| ast.LtE: "<=", |
| ast.NotEq: "!=", |
| ast.NotIn: "not in", |
| } |
| |
| |
| def _contexts_from_module() -> dict[type[ast.expr_context], Context]: |
| return { |
| ast.Load: Context.Load, |
| ast.Store: Context.Store, |
| ast.Del: Context.Del, |
| ast.Param: Context.Store, |
| } |