prosody
1ceee8becb1a
util/set.lua

Find changesets by keywords by author, files, the commit message, revision number or hash, or revset expression.

Software / code / prosody

Annotate

util/set.lua @ 11788:1ceee8becb1a

util.set: Add :contains_set() method
author Matthew Wild <mwild1@gmail.com>
date Sun, 12 Sep 2021 10:51:27 +0100
parent 11560:3bbb1af92514
child 12986:895a82c5d8d4
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
1522
569d58d21612 Add copyright header to those files missing one
Matthew Wild <mwild1@gmail.com>
parents: 1030
diff changeset
1 -- Prosody IM
2923
b7049746bd29 Update copyright headers for 2010
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
2 -- Copyright (C) 2008-2010 Matthew Wild
b7049746bd29 Update copyright headers for 2010
Matthew Wild <mwild1@gmail.com>
parents: 1522
diff changeset
3 -- Copyright (C) 2008-2010 Waqas Hussain
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 4908
diff changeset
4 --
1522
569d58d21612 Add copyright header to those files missing one
Matthew Wild <mwild1@gmail.com>
parents: 1030
diff changeset
5 -- This project is MIT/X11 licensed. Please see the
569d58d21612 Add copyright header to those files missing one
Matthew Wild <mwild1@gmail.com>
parents: 1030
diff changeset
6 -- COPYING file in the source package for more information.
569d58d21612 Add copyright header to those files missing one
Matthew Wild <mwild1@gmail.com>
parents: 1030
diff changeset
7 --
569d58d21612 Add copyright header to those files missing one
Matthew Wild <mwild1@gmail.com>
parents: 1030
diff changeset
8
3540
bc139431830b Monster whitespace commit (beware the whitespace monster).
Waqas Hussain <waqas20@gmail.com>
parents: 2923
diff changeset
9 local ipairs, pairs, setmetatable, next, tostring =
1028
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
10 ipairs, pairs, setmetatable, next, tostring;
10594
13d5fb74648f util.set: Fix equality metamethod in Lua 5.3
Kim Alvefur <zash@zash.se>
parents: 9488
diff changeset
11 local getmetatable = getmetatable;
1028
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
12 local t_concat = table.concat;
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
13
6777
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
14 local _ENV = nil;
8555
4f0f5b49bb03 vairious: Add annotation when an empty environment is set [luacheck]
Kim Alvefur <zash@zash.se>
parents: 8522
diff changeset
15 -- luacheck: std none
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
16
8522
073e517a1487 util.set: Add a __name field to metatable
Kim Alvefur <zash@zash.se>
parents: 6777
diff changeset
17 local set_mt = { __name = "set" };
1028
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
18 function set_mt.__call(set, _, k)
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
19 return next(set._items, k);
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
20 end
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
21
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
22 local items_mt = {};
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
23 function items_mt.__call(items, _, k)
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
24 return next(items, k);
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
25 end
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
26
9488
a96a2fbcc6c0 util.set: Add freeze metamethod
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
27 function set_mt:__freeze()
a96a2fbcc6c0 util.set: Add freeze metamethod
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
28 local a, i = {}, 1;
a96a2fbcc6c0 util.set: Add freeze metamethod
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
29 for item in self._items do
a96a2fbcc6c0 util.set: Add freeze metamethod
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
30 a[i], i = item, i+1;
a96a2fbcc6c0 util.set: Add freeze metamethod
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
31 end
a96a2fbcc6c0 util.set: Add freeze metamethod
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
32 return a;
a96a2fbcc6c0 util.set: Add freeze metamethod
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
33 end
a96a2fbcc6c0 util.set: Add freeze metamethod
Kim Alvefur <zash@zash.se>
parents: 8555
diff changeset
34
11542
c358537c0878 util.set: Add is_set() to test if an object is a set
Matthew Wild <mwild1@gmail.com>
parents: 9488
diff changeset
35 local function is_set(o)
c358537c0878 util.set: Add is_set() to test if an object is a set
Matthew Wild <mwild1@gmail.com>
parents: 9488
diff changeset
36 local mt = getmetatable(o);
c358537c0878 util.set: Add is_set() to test if an object is a set
Matthew Wild <mwild1@gmail.com>
parents: 9488
diff changeset
37 return mt == set_mt;
c358537c0878 util.set: Add is_set() to test if an object is a set
Matthew Wild <mwild1@gmail.com>
parents: 9488
diff changeset
38 end
c358537c0878 util.set: Add is_set() to test if an object is a set
Matthew Wild <mwild1@gmail.com>
parents: 9488
diff changeset
39
6777
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
40 local function new(list)
1028
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
41 local items = setmetatable({}, items_mt);
917
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
42 local set = { _items = items };
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 4908
diff changeset
43
6674
a0ce52e11122 util.set: Add luacheck annotation for methods not referencing 'self'
Matthew Wild <mwild1@gmail.com>
parents: 6673
diff changeset
44 -- We access the set through an upvalue in these methods, so ignore 'self' being unused
a0ce52e11122 util.set: Add luacheck annotation for methods not referencing 'self'
Matthew Wild <mwild1@gmail.com>
parents: 6673
diff changeset
45 --luacheck: ignore 212/self
a0ce52e11122 util.set: Add luacheck annotation for methods not referencing 'self'
Matthew Wild <mwild1@gmail.com>
parents: 6673
diff changeset
46
905
6169597d5574 util.set: Fix to make constructor work, and functions defined correctly
Matthew Wild <mwild1@gmail.com>
parents: 904
diff changeset
47 function set:add(item)
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
48 items[item] = true;
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
49 end
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 4908
diff changeset
50
905
6169597d5574 util.set: Fix to make constructor work, and functions defined correctly
Matthew Wild <mwild1@gmail.com>
parents: 904
diff changeset
51 function set:contains(item)
6169597d5574 util.set: Fix to make constructor work, and functions defined correctly
Matthew Wild <mwild1@gmail.com>
parents: 904
diff changeset
52 return items[item];
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
53 end
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 4908
diff changeset
54
11788
1ceee8becb1a util.set: Add :contains_set() method
Matthew Wild <mwild1@gmail.com>
parents: 11560
diff changeset
55 function set:contains_set(other_set)
1ceee8becb1a util.set: Add :contains_set() method
Matthew Wild <mwild1@gmail.com>
parents: 11560
diff changeset
56 for item in other_set do
1ceee8becb1a util.set: Add :contains_set() method
Matthew Wild <mwild1@gmail.com>
parents: 11560
diff changeset
57 if not self:contains(item) then
1ceee8becb1a util.set: Add :contains_set() method
Matthew Wild <mwild1@gmail.com>
parents: 11560
diff changeset
58 return false;
1ceee8becb1a util.set: Add :contains_set() method
Matthew Wild <mwild1@gmail.com>
parents: 11560
diff changeset
59 end
1ceee8becb1a util.set: Add :contains_set() method
Matthew Wild <mwild1@gmail.com>
parents: 11560
diff changeset
60 end
1ceee8becb1a util.set: Add :contains_set() method
Matthew Wild <mwild1@gmail.com>
parents: 11560
diff changeset
61 return true;
1ceee8becb1a util.set: Add :contains_set() method
Matthew Wild <mwild1@gmail.com>
parents: 11560
diff changeset
62 end
1ceee8becb1a util.set: Add :contains_set() method
Matthew Wild <mwild1@gmail.com>
parents: 11560
diff changeset
63
905
6169597d5574 util.set: Fix to make constructor work, and functions defined correctly
Matthew Wild <mwild1@gmail.com>
parents: 904
diff changeset
64 function set:items()
5817
6e087f3b8f3b util.set: :items() now returns an iterator instead of the underlying table. This is much more efficient than 'for item in set' (which still works for now). Current access to _items is generally done directly, this may change.
Matthew Wild <mwild1@gmail.com>
parents: 5814
diff changeset
65 return next, items;
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
66 end
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 4908
diff changeset
67
905
6169597d5574 util.set: Fix to make constructor work, and functions defined correctly
Matthew Wild <mwild1@gmail.com>
parents: 904
diff changeset
68 function set:remove(item)
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
69 items[item] = nil;
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
70 end
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 4908
diff changeset
71
6675
cb5b56ddabfd util.set: Rename method argument to avoid name clash [luacheck]
Matthew Wild <mwild1@gmail.com>
parents: 6674
diff changeset
72 function set:add_list(item_list)
cb5b56ddabfd util.set: Rename method argument to avoid name clash [luacheck]
Matthew Wild <mwild1@gmail.com>
parents: 6674
diff changeset
73 if item_list then
cb5b56ddabfd util.set: Rename method argument to avoid name clash [luacheck]
Matthew Wild <mwild1@gmail.com>
parents: 6674
diff changeset
74 for _, item in ipairs(item_list) do
4544
316e2b09a562 util.set: Accept nil to add_list()
Matthew Wild <mwild1@gmail.com>
parents: 3540
diff changeset
75 items[item] = true;
316e2b09a562 util.set: Accept nil to add_list()
Matthew Wild <mwild1@gmail.com>
parents: 3540
diff changeset
76 end
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
77 end
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
78 end
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 4908
diff changeset
79
905
6169597d5574 util.set: Fix to make constructor work, and functions defined correctly
Matthew Wild <mwild1@gmail.com>
parents: 904
diff changeset
80 function set:include(otherset)
5813
c888f548876b util.set: Fix :include() and :exclude() methods to iterate the input set correctly
Matthew Wild <mwild1@gmail.com>
parents: 4908
diff changeset
81 for item in otherset do
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
82 items[item] = true;
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
83 end
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
84 end
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
85
905
6169597d5574 util.set: Fix to make constructor work, and functions defined correctly
Matthew Wild <mwild1@gmail.com>
parents: 904
diff changeset
86 function set:exclude(otherset)
5813
c888f548876b util.set: Fix :include() and :exclude() methods to iterate the input set correctly
Matthew Wild <mwild1@gmail.com>
parents: 4908
diff changeset
87 for item in otherset do
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
88 items[item] = nil;
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
89 end
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
90 end
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 4908
diff changeset
91
1029
4ead03974759 util.set: Add set:empty() to discover if the set is the empty set
Matthew Wild <mwild1@gmail.com>
parents: 1028
diff changeset
92 function set:empty()
4ead03974759 util.set: Add set:empty() to discover if the set is the empty set
Matthew Wild <mwild1@gmail.com>
parents: 1028
diff changeset
93 return not next(items);
4ead03974759 util.set: Add set:empty() to discover if the set is the empty set
Matthew Wild <mwild1@gmail.com>
parents: 1028
diff changeset
94 end
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 4908
diff changeset
95
905
6169597d5574 util.set: Fix to make constructor work, and functions defined correctly
Matthew Wild <mwild1@gmail.com>
parents: 904
diff changeset
96 if list then
6169597d5574 util.set: Fix to make constructor work, and functions defined correctly
Matthew Wild <mwild1@gmail.com>
parents: 904
diff changeset
97 set:add_list(list);
6169597d5574 util.set: Fix to make constructor work, and functions defined correctly
Matthew Wild <mwild1@gmail.com>
parents: 904
diff changeset
98 end
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 4908
diff changeset
99
1028
594a07e753a0 util.set: Add metatable to sets to allow +, -, /, ==, tostring and to double as iterators
Matthew Wild <mwild1@gmail.com>
parents: 917
diff changeset
100 return setmetatable(set, set_mt);
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
101 end
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
102
6777
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
103 local function union(set1, set2)
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
104 local set = new();
917
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
105 local items = set._items;
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 4908
diff changeset
106
917
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
107 for item in pairs(set1._items) do
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
108 items[item] = true;
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
109 end
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
110
917
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
111 for item in pairs(set2._items) do
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
112 items[item] = true;
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
113 end
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 4908
diff changeset
114
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
115 return set;
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
116 end
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
117
6777
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
118 local function difference(set1, set2)
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
119 local set = new();
917
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
120 local items = set._items;
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 4908
diff changeset
121
917
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
122 for item in pairs(set1._items) do
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
123 items[item] = (not set2._items[item]) or nil;
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
124 end
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
125
917
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
126 return set;
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
127 end
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
128
6777
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
129 local function intersection(set1, set2)
917
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
130 local set = new();
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
131 local items = set._items;
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 4908
diff changeset
132
917
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
133 set1, set2 = set1._items, set2._items;
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 4908
diff changeset
134
917
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
135 for item in pairs(set1) do
f12f88b3d4a1 util.set: Rename private items container, optimise set.difference() and add set.intersection()
Matthew Wild <mwild1@gmail.com>
parents: 905
diff changeset
136 items[item] = (not not set2[item]) or nil;
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
137 end
5776
bd0ff8ae98a8 Remove all trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 4908
diff changeset
138
904
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
139 return set;
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
140 end
0205dcd0854a util.set: New util library
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
141
6777
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
142 local function xor(set1, set2)
1030
a82268d507fc util.set: Add set.xor() to get a set consisting of items not in both sets
Matthew Wild <mwild1@gmail.com>
parents: 1029
diff changeset
143 return union(set1, set2) - intersection(set1, set2);
a82268d507fc util.set: Add set.xor() to get a set consisting of items not in both sets
Matthew Wild <mwild1@gmail.com>
parents: 1029
diff changeset
144 end
a82268d507fc util.set: Add set.xor() to get a set consisting of items not in both sets
Matthew Wild <mwild1@gmail.com>
parents: 1029
diff changeset
145
6777
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
146 function set_mt.__add(set1, set2)
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
147 return union(set1, set2);
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
148 end
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
149 function set_mt.__sub(set1, set2)
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
150 return difference(set1, set2);
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
151 end
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
152 function set_mt.__div(set, func)
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
153 local new_set = new();
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
154 local items, new_items = set._items, new_set._items;
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
155 for item in pairs(items) do
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
156 local new_item = func(item);
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
157 if new_item ~= nil then
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
158 new_items[new_item] = true;
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
159 end
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
160 end
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
161 return new_set;
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
162 end
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
163 function set_mt.__eq(set1, set2)
10594
13d5fb74648f util.set: Fix equality metamethod in Lua 5.3
Kim Alvefur <zash@zash.se>
parents: 9488
diff changeset
164 if getmetatable(set1) ~= set_mt or getmetatable(set2) ~= set_mt then
13d5fb74648f util.set: Fix equality metamethod in Lua 5.3
Kim Alvefur <zash@zash.se>
parents: 9488
diff changeset
165 -- Lua 5.3+ calls this if both operands are tables, even if metatables differ
13d5fb74648f util.set: Fix equality metamethod in Lua 5.3
Kim Alvefur <zash@zash.se>
parents: 9488
diff changeset
166 return false;
13d5fb74648f util.set: Fix equality metamethod in Lua 5.3
Kim Alvefur <zash@zash.se>
parents: 9488
diff changeset
167 end
13d5fb74648f util.set: Fix equality metamethod in Lua 5.3
Kim Alvefur <zash@zash.se>
parents: 9488
diff changeset
168
6777
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
169 set1, set2 = set1._items, set2._items;
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
170 for item in pairs(set1) do
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
171 if not set2[item] then
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
172 return false;
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
173 end
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
174 end
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
175
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
176 for item in pairs(set2) do
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
177 if not set1[item] then
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
178 return false;
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
179 end
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
180 end
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
181
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
182 return true;
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
183 end
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
184 function set_mt.__tostring(set)
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
185 local s, items = { }, set._items;
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
186 for item in pairs(items) do
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
187 s[#s+1] = tostring(item);
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
188 end
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
189 return t_concat(s, ", ");
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
190 end
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
191
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
192 return {
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
193 new = new;
11542
c358537c0878 util.set: Add is_set() to test if an object is a set
Matthew Wild <mwild1@gmail.com>
parents: 9488
diff changeset
194 is_set = is_set;
6777
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
195 union = union;
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
196 difference = difference;
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
197 intersection = intersection;
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
198 xor = xor;
5de6b93d0190 util.*: Remove use of module() function, make all module functions local and return them in a table at the end
Kim Alvefur <zash@zash.se>
parents: 6675
diff changeset
199 };