mirror of
https://github.com/Instagram/LibCST.git
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45 lines
1.7 KiB
Python
45 lines
1.7 KiB
Python
# Copyright (c) Facebook, Inc. and its affiliates.
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#
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# This source code is licensed under the MIT license found in the
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# LICENSE file in the root directory of this source tree.
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from typing import Any, Iterable, Mapping, Sequence
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from parso.pgen2.generator import Grammar
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from parso.python.token import TokenType
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from libcst.parser._base_parser import BaseParser
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from libcst.parser._grammar import get_nonterminal_conversions, get_terminal_conversions
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from libcst.parser._types.config import ParserConfig
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from libcst.parser._types.conversions import NonterminalConversion, TerminalConversion
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from libcst.parser._types.token import Token
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class PythonCSTParser(BaseParser[Token, TokenType, Any]):
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config: ParserConfig
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terminal_conversions: Mapping[str, TerminalConversion]
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nonterminal_conversions: Mapping[str, NonterminalConversion]
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def __init__(
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self,
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*,
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tokens: Iterable[Token],
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config: ParserConfig,
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pgen_grammar: "Grammar[TokenType]",
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start_nonterminal: str = "file_input",
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) -> None:
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super().__init__(
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tokens=tokens,
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lines=config.lines,
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pgen_grammar=pgen_grammar,
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start_nonterminal=start_nonterminal,
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)
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self.config = config
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self.terminal_conversions = get_terminal_conversions()
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self.nonterminal_conversions = get_nonterminal_conversions()
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def convert_nonterminal(self, nonterminal: str, children: Sequence[Any]) -> Any:
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return self.nonterminal_conversions[nonterminal](self.config, children)
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def convert_terminal(self, token: Token) -> Any:
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return self.terminal_conversions[token.type.name](self.config, token)
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