1"""Vendoered from
2https://github.com/pypa/packaging/blob/main/packaging/_structures.py
3"""
4# Copyright (c) Donald Stufft and individual contributors.
5# All rights reserved.
6
7# Redistribution and use in source and binary forms, with or without
8# modification, are permitted provided that the following conditions are met:
9
10# 1. Redistributions of source code must retain the above copyright notice,
11# this list of conditions and the following disclaimer.
12
13# 2. Redistributions in binary form must reproduce the above copyright
14# notice, this list of conditions and the following disclaimer in the
15# documentation and/or other materials provided with the distribution.
16
17# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
18# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
19# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
20# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
21# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
23# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
24# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28
29class InfinityType:
30 def __repr__(self) -> str:
31 return "Infinity"
32
33 def __hash__(self) -> int:
34 return hash(repr(self))
35
36 def __lt__(self, other: object) -> bool:
37 return False
38
39 def __le__(self, other: object) -> bool:
40 return False
41
42 def __eq__(self, other: object) -> bool:
43 return isinstance(other, self.__class__)
44
45 def __ne__(self, other: object) -> bool:
46 return not isinstance(other, self.__class__)
47
48 def __gt__(self, other: object) -> bool:
49 return True
50
51 def __ge__(self, other: object) -> bool:
52 return True
53
54 def __neg__(self: object) -> "NegativeInfinityType":
55 return NegativeInfinity
56
57
58Infinity = InfinityType()
59
60
61class NegativeInfinityType:
62 def __repr__(self) -> str:
63 return "-Infinity"
64
65 def __hash__(self) -> int:
66 return hash(repr(self))
67
68 def __lt__(self, other: object) -> bool:
69 return True
70
71 def __le__(self, other: object) -> bool:
72 return True
73
74 def __eq__(self, other: object) -> bool:
75 return isinstance(other, self.__class__)
76
77 def __ne__(self, other: object) -> bool:
78 return not isinstance(other, self.__class__)
79
80 def __gt__(self, other: object) -> bool:
81 return False
82
83 def __ge__(self, other: object) -> bool:
84 return False
85
86 def __neg__(self: object) -> InfinityType:
87 return Infinity
88
89
90NegativeInfinity = NegativeInfinityType()