Metatables

Returns the raw metatable.

local mt = getrawmetatable(game)
print(mt)

Replaces the raw metatable.

local object = {}
setrawmetatable(object, { __index = function() return 1 end })
print(object.anything)

Hooks a metamethod and returns the original.

local old
old = hookmetamethod(game, "__namecall", function(self, ...)
    return old(self, ...)
end)

Reads or sets a table read-only state.

local t = {}
setreadonly(t, true)
print(isreadonly(t))

Makes a table read-only or writable.

local t = {}
makereadonly(t)
print(isreadonly(t))
makewriteable(t)
print(isreadonly(t))

Returns the current __namecall method name.

hookmetamethod(game, "__namecall", function(self, ...)
    print(getnamecallmethod())
    return self
end)

Sets the current namecall method for the active metamethod call.

hookmetamethod(game, "__namecall", function(self, ...)
    setnamecallmethod("Custom")
    return self
end)

Returns a field from an object's raw metatable.

local object = setmetatable({}, { __index = function() return 1 end })
print(getmetafield(object, "__index") ~= nil)

Returns true when an object's raw metatable contains the field.

print(hasmetafield(setmetatable({}, { __index = function() end }), "__index"))

Returns true when the object has a metatable.

print(hasmetatable(setmetatable({}, {}))) -- true

Returns true when a table is not read-only.

local t = {}
makereadonly(t)
print(iswritable(t)) -- false
makewriteable(t)
print(iswritable(t)) -- true