library-mirrors/middleclass
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Support inheriting __gc, __mode, __metatable

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Do not directly set metatable of an instance dict to super's
instance dict so that special metamethods do not affect it.
This commit is contained in:
mpeterv 2015-11-19 13:41:38 +03:00
parent 0f9d5c8e61
commit beee81e36a
1 changed files with 4 additions and 3 deletions
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7
middleclass.lua
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@ -35,7 +35,7 @@ local function _setClassDictionariesMetatables(aClass)
local super = aClass.super
if super then
local superStatic = super.static
setmetatable(dict, super.__instanceDict)
setmetatable(dict, { __index = super.__instanceDict })
setmetatable(aClass.static, { __index = function(_,k) return rawget(dict,k) or superStatic[k] end })
else
setmetatable(aClass.static, { __index = function(_,k) return dict[k] end })
@ -43,8 +43,9 @@ local function _setClassDictionariesMetatables(aClass)
end
local all_metamethods_list = { '__add', '__band', '__bor', '__bxor', '__bnot', '__call', '__concat',
'__div', '__eq', '__ipairs', '__idiv', '__le', '__len', '__lt', '__mod',
'__mul', '__pairs', '__pow', '__shl', '__shr', '__sub', '__tostring', '__unm' }
'__div', '__eq', '__gc', '__ipairs', '__idiv', '__le', '__len', '__lt',
'__metatable', '__mod', '__mode', '__mul', '__pairs', '__pow', '__shl',
'__shr', '__sub', '__tostring', '__unm' }
local all_metamethods = {}