Re-organize directory structure (#4971)

See discussion in #2491

Co-authored-by: Ivan Levkivskyi <ilevkivskyi@dropbox.com>

stdlib/sre_parse.pyi

@@ -0,0 +1,101 @@
+import sys
+from sre_constants import _NamedIntConstant as _NIC, error as _Error
+from typing import Any, Dict, FrozenSet, Iterable, List, Match, Optional, Pattern as _Pattern, Tuple, Union, overload
+
+SPECIAL_CHARS: str
+REPEAT_CHARS: str
+DIGITS: FrozenSet[str]
+OCTDIGITS: FrozenSet[str]
+HEXDIGITS: FrozenSet[str]
+ASCIILETTERS: FrozenSet[str]
+WHITESPACE: FrozenSet[str]
+ESCAPES: Dict[str, Tuple[_NIC, int]]
+CATEGORIES: Dict[str, Union[Tuple[_NIC, _NIC], Tuple[_NIC, List[Tuple[_NIC, _NIC]]]]]
+FLAGS: Dict[str, int]
+GLOBAL_FLAGS: int
+
+class Verbose(Exception): ...
+
+class _State:
+    flags: int
+    groupdict: Dict[str, int]
+    groupwidths: List[Optional[int]]
+    lookbehindgroups: Optional[int]
+    def __init__(self) -> None: ...
+    @property
+    def groups(self) -> int: ...
+    def opengroup(self, name: str = ...) -> int: ...
+    def closegroup(self, gid: int, p: SubPattern) -> None: ...
+    def checkgroup(self, gid: int) -> bool: ...
+    def checklookbehindgroup(self, gid: int, source: Tokenizer) -> None: ...
+
+if sys.version_info >= (3, 8):
+    State = _State
+else:
+    Pattern = _State
+
+_OpSubpatternType = Tuple[Optional[int], int, int, SubPattern]
+_OpGroupRefExistsType = Tuple[int, SubPattern, SubPattern]
+_OpInType = List[Tuple[_NIC, int]]
+_OpBranchType = Tuple[None, List[SubPattern]]
+_AvType = Union[_OpInType, _OpBranchType, Iterable[SubPattern], _OpGroupRefExistsType, _OpSubpatternType]
+_CodeType = Tuple[_NIC, _AvType]
+
+class SubPattern:
+    data: List[_CodeType]
+    width: Optional[int]
+
+    if sys.version_info >= (3, 8):
+        state: State
+        def __init__(self, state: State, data: Optional[List[_CodeType]] = ...) -> None: ...
+    else:
+        pattern: Pattern
+        def __init__(self, pattern: Pattern, data: Optional[List[_CodeType]] = ...) -> None: ...
+    def dump(self, level: int = ...) -> None: ...
+    def __len__(self) -> int: ...
+    def __delitem__(self, index: Union[int, slice]) -> None: ...
+    def __getitem__(self, index: Union[int, slice]) -> Union[SubPattern, _CodeType]: ...
+    def __setitem__(self, index: Union[int, slice], code: _CodeType) -> None: ...
+    def insert(self, index: int, code: _CodeType) -> None: ...
+    def append(self, code: _CodeType) -> None: ...
+    def getwidth(self) -> int: ...
+
+class Tokenizer:
+    istext: bool
+    string: Any
+    decoded_string: str
+    index: int
+    next: Optional[str]
+    def __init__(self, string: Any) -> None: ...
+    def match(self, char: str) -> bool: ...
+    def get(self) -> Optional[str]: ...
+    def getwhile(self, n: int, charset: Iterable[str]) -> str: ...
+    if sys.version_info >= (3, 8):
+        def getuntil(self, terminator: str, name: str) -> str: ...
+    else:
+        def getuntil(self, terminator: str) -> str: ...
+    @property
+    def pos(self) -> int: ...
+    def tell(self) -> int: ...
+    def seek(self, index: int) -> None: ...
+    def error(self, msg: str, offset: int = ...) -> _Error: ...
+
+def fix_flags(src: Union[str, bytes], flags: int) -> int: ...
+
+_TemplateType = Tuple[List[Tuple[int, int]], List[Optional[str]]]
+_TemplateByteType = Tuple[List[Tuple[int, int]], List[Optional[bytes]]]
+if sys.version_info >= (3, 8):
+    def parse(str: str, flags: int = ..., state: Optional[State] = ...) -> SubPattern: ...
+    @overload
+    def parse_template(source: str, state: _Pattern[Any]) -> _TemplateType: ...
+    @overload
+    def parse_template(source: bytes, state: _Pattern[Any]) -> _TemplateByteType: ...
+
+else:
+    def parse(str: str, flags: int = ..., pattern: Optional[Pattern] = ...) -> SubPattern: ...
+    @overload
+    def parse_template(source: str, pattern: _Pattern[Any]) -> _TemplateType: ...
+    @overload
+    def parse_template(source: bytes, pattern: _Pattern[Any]) -> _TemplateByteType: ...
+
+def expand_template(template: _TemplateType, match: Match[Any]) -> str: ...