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import re
from collections.abc import Iterable, Sequence
from sybil import Document, Region
from sybil.evaluators.skip import Skipper
from sybil.parsers.abstract.lexers import LexerCollection
from sybil.typing import Lexer
SKIP_ARGUMENTS_PATTERN = re.compile(r'(\w+)(?:\s+(.+)$)?')
class AbstractSkipParser:
"""
An abstract parser for skipping subsequent examples.
:param lexers:
A sequence of :any:`Lexer` objects that will be applied in turn to each
:class:`~sybil.Document` that is parsed.
"""
directive = 'skip'
def __init__(self, lexers: Sequence[Lexer]):
self.lexers = LexerCollection(lexers)
self.skipper = Skipper(self.directive)
def __call__(self, document: Document) -> Iterable[Region]:
for lexed in self.lexers(document):
arguments = lexed.lexemes['arguments']
if arguments is None:
raise ValueError(f'missing arguments to {self.directive}')
match = SKIP_ARGUMENTS_PATTERN.match(arguments)
if match is None:
raise ValueError(f'malformed arguments to {self.directive}: {arguments!r}')
yield Region(lexed.start, lexed.end, match.groups(), self.skipper)
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