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comparison util/ip.lua @ 8436:ab9ddfb03d4d

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util.ip: Cache return values of all methods in one place
author Kim Alvefur <zash@zash.se>
date Fri, 01 Dec 2017 02:25:25 +0100
parents 47195f035d2f
children 021129f7b0a3
comparison
equal deleted inserted replaced
8435:47195f035d2f 8436:ab9ddfb03d4d
10 10
11 local ip_methods = {}; 11 local ip_methods = {};
12 12
13 local ip_mt = { 13 local ip_mt = {
14 __index = function (ip, key) 14 __index = function (ip, key)
15 return ip_methods[key](ip); 15 local method = ip_methods[key];
16 if not method then return nil; end
17 local ret = method(ip);
18 ip[key] = ret;
19 return ret;
16 end, 20 end,
17 __tostring = function (ip) return ip.addr; end, 21 __tostring = function (ip) return ip.addr; end,
18 __eq = function (ipA, ipB) return ipA.addr == ipB.addr; end 22 __eq = function (ipA, ipB) return ipA.addr == ipB.addr; end
19 }; 23 };
20 24