diff options
Diffstat (limited to 'tools/cru-py/cru/parsing.py')
-rw-r--r-- | tools/cru-py/cru/parsing.py | 155 |
1 files changed, 85 insertions, 70 deletions
diff --git a/tools/cru-py/cru/parsing.py b/tools/cru-py/cru/parsing.py index be7bbf4..a9eee04 100644 --- a/tools/cru-py/cru/parsing.py +++ b/tools/cru-py/cru/parsing.py @@ -1,70 +1,85 @@ -from abc import ABCMeta, abstractmethod
-from typing import TypeVar, Generic, NoReturn, Callable
-
-from cru.excp import CruException, CRU_EXCEPTION_ATTR_DEF_REGISTRY
-
-R = TypeVar("R")
-
-
-class ParseException(CruException):
- LINE_NUMBER_KEY = "line_number"
-
- CRU_EXCEPTION_ATTR_DEF_REGISTRY.register_with(LINE_NUMBER_KEY, "Line number of the error.")
-
-
-class Parser(Generic[R], metaclass=ABCMeta):
- def __init__(self, name: str) -> None:
- self._name = name
-
- @property
- def name(self) -> str:
- return self._name
-
- @abstractmethod
- def parse(self, s: str) -> R:
- raise NotImplementedError()
-
- def raise_parse_exception(self, s: str, line_number: int | None = None) -> NoReturn:
- a = f" at line {line_number}" if line_number is not None else ""
- raise ParseException(f"Parser {self.name} failed{a}, {s}")
-
-
-class SimpleLineConfigParser(Parser[list[tuple[str, str]]]):
- def __init__(self) -> None:
- super().__init__(type(self).__name__)
-
- def _parse(self, s: str, f: Callable[[str, str], None]) -> None:
- for ln, line in enumerate(s.splitlines()):
- line_number = ln + 1
- # check if it's a comment
- if line.strip().startswith("#"):
- continue
- # check if there is a '='
- if line.find("=") == -1:
- self.raise_parse_exception(f"There is even no '='!", line_number)
- # split at first '='
- key, value = line.split("=", 1)
- key = key.strip()
- value = value.strip()
- f(key, value)
-
- def parse(self, s: str) -> list[tuple[str, str]]:
- items = []
- self._parse(s, lambda key, value: items.append((key, value)))
- return items
-
- def parse_to_dict(self, s: str, /, allow_override: bool = False) -> tuple[dict[str, str], list[tuple[str, str]]]:
- d = {}
- duplicate = []
-
- def add(key: str, value: str) -> None:
- if key in d:
- if allow_override:
- duplicate.append((key, d[key]))
- d[key] = value
- else:
- self.raise_parse_exception(f"Key '{key}' already exists!", None)
- d[key] = value
-
- self._parse(s, add)
- return d, duplicate
+from abc import ABCMeta, abstractmethod +from typing import TypeVar, Generic, NoReturn, Callable + +from ._error import CruException + +_T = TypeVar("_T") + + +class ParseException(CruException): + def __init__( + self, message, text: str, line_number: int | None = None, *args, **kwargs + ): + super().__init__(message, *args, **kwargs) + self._text = text + self._line_number = line_number + + @property + def text(self) -> str: + return self._text + + @property + def line_number(self) -> int | None: + return self._line_number + + +class Parser(Generic[_T], metaclass=ABCMeta): + def __init__(self, name: str) -> None: + self._name = name + + @property + def name(self) -> str: + return self._name + + @abstractmethod + def parse(self, s: str) -> _T: + raise NotImplementedError() + + def raise_parse_exception( + self, text: str, line_number: int | None = None + ) -> NoReturn: + a = f" at line {line_number}" if line_number is not None else "" + raise ParseException(f"Parser {self.name} failed{a}.", text, line_number) + + +class SimpleLineConfigParser(Parser[list[tuple[str, str]]]): + def __init__(self) -> None: + super().__init__(type(self).__name__) + + def _parse(self, s: str, callback: Callable[[str, str], None]) -> None: + for ln, line in enumerate(s.splitlines()): + line_number = ln + 1 + # check if it's a comment + if line.strip().startswith("#"): + continue + # check if there is a '=' + if line.find("=") == -1: + self.raise_parse_exception("There is even no '='!", line_number) + # split at first '=' + key, value = line.split("=", 1) + key = key.strip() + value = value.strip() + callback(key, value) + + def parse(self, s: str) -> list[tuple[str, str]]: + items = [] + self._parse(s, lambda key, value: items.append((key, value))) + return items + + def parse_to_dict( + self, s: str, /, allow_override: bool = False + ) -> tuple[dict[str, str], list[tuple[str, str]]]: + result: dict[str, str] = {} + duplicate: list[tuple[str, str]] = [] + + def add(key: str, value: str) -> None: + if key in result: + if allow_override: + duplicate.append((key, result[key])) + result[key] = value + else: + self.raise_parse_exception(f"Key '{key}' already exists!", None) + result[key] = value + + self._parse(s, add) + return result, duplicate |