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comparison util/set.lua @ 9488:a96a2fbcc6c0

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util.set: Add freeze metamethod
author Kim Alvefur <zash@zash.se>
date Fri, 12 Oct 2018 00:51:56 +0200
parents 4f0f5b49bb03
children 13d5fb74648f c358537c0878
comparison
equal deleted inserted replaced
9487:4e38121a349d 9488:a96a2fbcc6c0
19 end 19 end
20 20
21 local items_mt = {}; 21 local items_mt = {};
22 function items_mt.__call(items, _, k) 22 function items_mt.__call(items, _, k)
23 return next(items, k); 23 return next(items, k);
24 end
25
26 function set_mt:__freeze()
27 local a, i = {}, 1;
28 for item in self._items do
29 a[i], i = item, i+1;
30 end
31 return a;
24 end 32 end
25 33
26 local function new(list) 34 local function new(list)
27 local items = setmetatable({}, items_mt); 35 local items = setmetatable({}, items_mt);
28 local set = { _items = items }; 36 local set = { _items = items };