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"""
pint.delegates.txt_defparser.block
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Classes for Pint Blocks, which are defined by:
@<block name>
<content>
@end
:copyright: 2022 by Pint Authors, see AUTHORS for more details.
:license: BSD, see LICENSE for more details.
"""
from __future__ import annotations
from dataclasses import dataclass
from typing import Generic, TypeVar
from ..base_defparser import PintParsedStatement, ParserConfig
from ..._vendor import flexparser as fp
@dataclass(frozen=True)
class EndDirectiveBlock(PintParsedStatement):
"""An EndDirectiveBlock is simply an "@end" statement."""
@classmethod
def from_string(cls, s: str) -> fp.FromString[EndDirectiveBlock]:
if s == "@end":
return cls()
return None
OPST = TypeVar("OPST", bound="PintParsedStatement")
IPST = TypeVar("IPST", bound="PintParsedStatement")
DefT = TypeVar("DefT")
@dataclass(frozen=True)
class DirectiveBlock(
Generic[DefT, OPST, IPST], fp.Block[OPST, IPST, EndDirectiveBlock, ParserConfig]
):
"""Directive blocks have beginning statement starting with a @ character.
and ending with a "@end" (captured using a EndDirectiveBlock).
Subclass this class for convenience.
"""
closing: EndDirectiveBlock
def derive_definition(self) -> DefT:
...
|
