From 83eb775cb0b7287da70b8203cf7acfd5fd4b9c26 Mon Sep 17 00:00:00 2001 From: Matthew Wild Date: Sun, 22 May 2016 18:18:23 +0100 Subject: util.cache: Add support for creating a proxy table to a cache, that looks and acts (mostly) like a normal table. No tests yet. --- util/cache.lua | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/util/cache.lua b/util/cache.lua index 54f3e10b..44bbfe30 100644 --- a/util/cache.lua +++ b/util/cache.lua @@ -116,6 +116,28 @@ function cache_methods:tail() return tail.key, tail.value; end +function cache_methods:table() + if not self.proxy_table then + self.proxy_table = setmetatable({}, { + __index = function (t, k) + return self:get(k); + end; + __newindex = function (t, k, v) + if not self:set(k, v) then + error("failed to insert key into cache - full"); + end + end; + __pairs = function (t) + return self:items(); + end; + __len = function (t) + return self:count(); + end; + }); + end + return self.proxy_table; +end + local function new(size, on_evict) size = assert(tonumber(size), "cache size must be a number"); size = math.floor(size); -- cgit v1.2.3