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authorblackhao <13851610112@163.com>2025-08-22 02:51:50 -0500
committerblackhao <13851610112@163.com>2025-08-22 02:51:50 -0500
commit4aab4087dc97906d0b9890035401175cdaab32d4 (patch)
tree4e2e9d88a711ec5b1cfa02e8ac72a55183b99123 /.venv/lib/python3.12/site-packages/~ip/_vendor/pyparsing/util.py
parentafa8f50d1d21c721dabcb31ad244610946ab65a3 (diff)
2.0
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+# util.py
+import inspect
+import warnings
+import types
+import collections
+import itertools
+from functools import lru_cache, wraps
+from typing import Callable, List, Union, Iterable, TypeVar, cast
+
+_bslash = chr(92)
+C = TypeVar("C", bound=Callable)
+
+
+class __config_flags:
+ """Internal class for defining compatibility and debugging flags"""
+
+ _all_names: List[str] = []
+ _fixed_names: List[str] = []
+ _type_desc = "configuration"
+
+ @classmethod
+ def _set(cls, dname, value):
+ if dname in cls._fixed_names:
+ warnings.warn(
+ f"{cls.__name__}.{dname} {cls._type_desc} is {str(getattr(cls, dname)).upper()}"
+ f" and cannot be overridden",
+ stacklevel=3,
+ )
+ return
+ if dname in cls._all_names:
+ setattr(cls, dname, value)
+ else:
+ raise ValueError(f"no such {cls._type_desc} {dname!r}")
+
+ enable = classmethod(lambda cls, name: cls._set(name, True))
+ disable = classmethod(lambda cls, name: cls._set(name, False))
+
+
+@lru_cache(maxsize=128)
+def col(loc: int, strg: str) -> int:
+ """
+ Returns current column within a string, counting newlines as line separators.
+ The first column is number 1.
+
+ Note: the default parsing behavior is to expand tabs in the input string
+ before starting the parsing process. See
+ :class:`ParserElement.parse_string` for more
+ information on parsing strings containing ``<TAB>`` s, and suggested
+ methods to maintain a consistent view of the parsed string, the parse
+ location, and line and column positions within the parsed string.
+ """
+ s = strg
+ return 1 if 0 < loc < len(s) and s[loc - 1] == "\n" else loc - s.rfind("\n", 0, loc)
+
+
+@lru_cache(maxsize=128)
+def lineno(loc: int, strg: str) -> int:
+ """Returns current line number within a string, counting newlines as line separators.
+ The first line is number 1.
+
+ Note - the default parsing behavior is to expand tabs in the input string
+ before starting the parsing process. See :class:`ParserElement.parse_string`
+ for more information on parsing strings containing ``<TAB>`` s, and
+ suggested methods to maintain a consistent view of the parsed string, the
+ parse location, and line and column positions within the parsed string.
+ """
+ return strg.count("\n", 0, loc) + 1
+
+
+@lru_cache(maxsize=128)
+def line(loc: int, strg: str) -> str:
+ """
+ Returns the line of text containing loc within a string, counting newlines as line separators.
+ """
+ last_cr = strg.rfind("\n", 0, loc)
+ next_cr = strg.find("\n", loc)
+ return strg[last_cr + 1 : next_cr] if next_cr >= 0 else strg[last_cr + 1 :]
+
+
+class _UnboundedCache:
+ def __init__(self):
+ cache = {}
+ cache_get = cache.get
+ self.not_in_cache = not_in_cache = object()
+
+ def get(_, key):
+ return cache_get(key, not_in_cache)
+
+ def set_(_, key, value):
+ cache[key] = value
+
+ def clear(_):
+ cache.clear()
+
+ self.size = None
+ self.get = types.MethodType(get, self)
+ self.set = types.MethodType(set_, self)
+ self.clear = types.MethodType(clear, self)
+
+
+class _FifoCache:
+ def __init__(self, size):
+ self.not_in_cache = not_in_cache = object()
+ cache = {}
+ keyring = [object()] * size
+ cache_get = cache.get
+ cache_pop = cache.pop
+ keyiter = itertools.cycle(range(size))
+
+ def get(_, key):
+ return cache_get(key, not_in_cache)
+
+ def set_(_, key, value):
+ cache[key] = value
+ i = next(keyiter)
+ cache_pop(keyring[i], None)
+ keyring[i] = key
+
+ def clear(_):
+ cache.clear()
+ keyring[:] = [object()] * size
+
+ self.size = size
+ self.get = types.MethodType(get, self)
+ self.set = types.MethodType(set_, self)
+ self.clear = types.MethodType(clear, self)
+
+
+class LRUMemo:
+ """
+ A memoizing mapping that retains `capacity` deleted items
+
+ The memo tracks retained items by their access order; once `capacity` items
+ are retained, the least recently used item is discarded.
+ """
+
+ def __init__(self, capacity):
+ self._capacity = capacity
+ self._active = {}
+ self._memory = collections.OrderedDict()
+
+ def __getitem__(self, key):
+ try:
+ return self._active[key]
+ except KeyError:
+ self._memory.move_to_end(key)
+ return self._memory[key]
+
+ def __setitem__(self, key, value):
+ self._memory.pop(key, None)
+ self._active[key] = value
+
+ def __delitem__(self, key):
+ try:
+ value = self._active.pop(key)
+ except KeyError:
+ pass
+ else:
+ while len(self._memory) >= self._capacity:
+ self._memory.popitem(last=False)
+ self._memory[key] = value
+
+ def clear(self):
+ self._active.clear()
+ self._memory.clear()
+
+
+class UnboundedMemo(dict):
+ """
+ A memoizing mapping that retains all deleted items
+ """
+
+ def __delitem__(self, key):
+ pass
+
+
+def _escape_regex_range_chars(s: str) -> str:
+ # escape these chars: ^-[]
+ for c in r"\^-[]":
+ s = s.replace(c, _bslash + c)
+ s = s.replace("\n", r"\n")
+ s = s.replace("\t", r"\t")
+ return str(s)
+
+
+def _collapse_string_to_ranges(
+ s: Union[str, Iterable[str]], re_escape: bool = True
+) -> str:
+ def is_consecutive(c):
+ c_int = ord(c)
+ is_consecutive.prev, prev = c_int, is_consecutive.prev
+ if c_int - prev > 1:
+ is_consecutive.value = next(is_consecutive.counter)
+ return is_consecutive.value
+
+ is_consecutive.prev = 0 # type: ignore [attr-defined]
+ is_consecutive.counter = itertools.count() # type: ignore [attr-defined]
+ is_consecutive.value = -1 # type: ignore [attr-defined]
+
+ def escape_re_range_char(c):
+ return "\\" + c if c in r"\^-][" else c
+
+ def no_escape_re_range_char(c):
+ return c
+
+ if not re_escape:
+ escape_re_range_char = no_escape_re_range_char
+
+ ret = []
+ s = "".join(sorted(set(s)))
+ if len(s) > 3:
+ for _, chars in itertools.groupby(s, key=is_consecutive):
+ first = last = next(chars)
+ last = collections.deque(
+ itertools.chain(iter([last]), chars), maxlen=1
+ ).pop()
+ if first == last:
+ ret.append(escape_re_range_char(first))
+ else:
+ sep = "" if ord(last) == ord(first) + 1 else "-"
+ ret.append(
+ f"{escape_re_range_char(first)}{sep}{escape_re_range_char(last)}"
+ )
+ else:
+ ret = [escape_re_range_char(c) for c in s]
+
+ return "".join(ret)
+
+
+def _flatten(ll: list) -> list:
+ ret = []
+ for i in ll:
+ if isinstance(i, list):
+ ret.extend(_flatten(i))
+ else:
+ ret.append(i)
+ return ret
+
+
+def _make_synonym_function(compat_name: str, fn: C) -> C:
+ # In a future version, uncomment the code in the internal _inner() functions
+ # to begin emitting DeprecationWarnings.
+
+ # Unwrap staticmethod/classmethod
+ fn = getattr(fn, "__func__", fn)
+
+ # (Presence of 'self' arg in signature is used by explain_exception() methods, so we take
+ # some extra steps to add it if present in decorated function.)
+ if "self" == list(inspect.signature(fn).parameters)[0]:
+
+ @wraps(fn)
+ def _inner(self, *args, **kwargs):
+ # warnings.warn(
+ # f"Deprecated - use {fn.__name__}", DeprecationWarning, stacklevel=3
+ # )
+ return fn(self, *args, **kwargs)
+
+ else:
+
+ @wraps(fn)
+ def _inner(*args, **kwargs):
+ # warnings.warn(
+ # f"Deprecated - use {fn.__name__}", DeprecationWarning, stacklevel=3
+ # )
+ return fn(*args, **kwargs)
+
+ _inner.__doc__ = f"""Deprecated - use :class:`{fn.__name__}`"""
+ _inner.__name__ = compat_name
+ _inner.__annotations__ = fn.__annotations__
+ if isinstance(fn, types.FunctionType):
+ _inner.__kwdefaults__ = fn.__kwdefaults__
+ elif isinstance(fn, type) and hasattr(fn, "__init__"):
+ _inner.__kwdefaults__ = fn.__init__.__kwdefaults__
+ else:
+ _inner.__kwdefaults__ = None
+ _inner.__qualname__ = fn.__qualname__
+ return cast(C, _inner)
+
+
+def replaced_by_pep8(fn: C) -> Callable[[Callable], C]:
+ """
+ Decorator for pre-PEP8 compatibility synonyms, to link them to the new function.
+ """
+ return lambda other: _make_synonym_function(other.__name__, fn)