import enum
from collections.abc import Callable
from typing import Any, AnyStr, Generic
from typing_extensions import TypeAlias

from .regex import Pattern

class error(Exception):
    def __init__(self, message: str, pattern: AnyStr | None = None, pos: int | None = None) -> None: ...

class RegexFlag(enum.IntFlag):
    A: int
    ASCII: int
    B: int
    BESTMATCH: int
    D: int
    DEBUG: int
    E: int
    ENHANCEMATCH: int
    F: int
    FULLCASE: int
    I: int
    IGNORECASE: int
    L: int
    LOCALE: int
    M: int
    MULTILINE: int
    P: int
    POSIX: int
    R: int
    REVERSE: int
    T: int
    TEMPLATE: int
    S: int
    DOTALL: int
    U: int
    UNICODE: int
    V0: int
    VERSION0: int
    V1: int
    VERSION1: int
    W: int
    WORD: int
    X: int
    VERBOSE: int

A: int
ASCII: int
B: int
BESTMATCH: int
D: int
DEBUG: int
E: int
ENHANCEMATCH: int
F: int
FULLCASE: int
I: int
IGNORECASE: int
L: int
LOCALE: int
M: int
MULTILINE: int
P: int
POSIX: int
R: int
REVERSE: int
T: int
TEMPLATE: int
S: int
DOTALL: int
U: int
UNICODE: int
V0: int
VERSION0: int
V1: int
VERSION1: int
W: int
WORD: int
X: int
VERBOSE: int

DEFAULT_VERSION: int

_Lexicon: TypeAlias = list[tuple[AnyStr, Callable[[Scanner[AnyStr], AnyStr], Any]]]

class Scanner(Generic[AnyStr]):
    lexicon: _Lexicon[AnyStr]
    scanner: Pattern[AnyStr]

    def __init__(self, lexicon: _Lexicon[AnyStr], flags: int = 0) -> None: ...
    def scan(self, string: AnyStr) -> tuple[list[Any], AnyStr]: ...