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44 lines
1.6 KiB
Python
44 lines
1.6 KiB
Python
# parser.py
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#
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# Copyright 2021 James Westman <james@jwestman.net>
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#
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# This file is free software; you can redistribute it and/or modify it
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# under the terms of the GNU Lesser General Public License as
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# published by the Free Software Foundation; either version 3 of the
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# License, or (at your option) any later version.
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#
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# This file is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# SPDX-License-Identifier: LGPL-3.0-or-later
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from .errors import MultipleErrors, PrintableError
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from .language import OBJECT_CONTENT_HOOKS, UI, Template
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from .parse_tree import *
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from .tokenizer import TokenType
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def parse(
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tokens: T.List[Token],
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) -> T.Tuple[T.Optional[UI], T.Optional[MultipleErrors], T.List[PrintableError]]:
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"""Parses a list of tokens into an abstract syntax tree."""
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try:
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ctx = ParseContext(tokens)
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AnyOf(UI).parse(ctx)
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ast_node = ctx.last_group.to_ast() if ctx.last_group else None
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errors = [*ctx.errors, *ast_node.errors]
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warnings = [*ctx.warnings, *ast_node.warnings]
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return (ast_node, MultipleErrors(errors) if len(errors) else None, warnings)
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except MultipleErrors as e:
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return (None, e, [])
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except CompileError as e:
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return (None, MultipleErrors([e]), [])
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