# The MIT License # # Copyright (c) 2015-2021 Sebastian Ramacher # # Permission is hereby granted, free of charge, to any person obtaining a copy # of this software and associated documentation files (the "Software"), to deal # in the Software without restriction, including without limitation the rights # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell # copies of the Software, and to permit persons to whom the Software is # furnished to do so, subject to the following conditions: # # The above copyright notice and this permission notice shall be included in # all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN # THE SOFTWARE. import re from typing import Optional, Iterator try: from functools import cached_property except ImportError: from backports.cached_property import cached_property # type: ignore class LazyReCompile: """Compile regular expressions on first use This class allows one to store regular expressions and compiles them on first use.""" def __init__(self, regex: str, flags: int = 0) -> None: self.regex = regex self.flags = flags @cached_property def compiled(self): return re.compile(self.regex, self.flags) def finditer(self, *args, **kwargs): return self.compiled.finditer(*args, **kwargs) def search(self, *args, **kwargs): return self.compiled.search(*args, **kwargs) def match(self, *args, **kwargs): return self.compiled.match(*args, **kwargs) def sub(self, *args, **kwargs) -> str: return self.compiled.sub(*args, **kwargs)