util.cache: Add support for creating a proxy table to a cache, that looks and acts (mostly) like a normal table. No tests yet.
--- a/util/cache.lua Sun May 22 14:39:14 2016 +0200
+++ b/util/cache.lua Sun May 22 18:18:23 2016 +0100
@@ -116,6 +116,28 @@
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);