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1
How could I use the metamethods of other metatables?
Let's say I have table which, when parsed into a String, will return the name property of the table.
local Table_mt = {
__index = Table,
__tostring = function(tab)
return tab.name
end
}
How could I make another table (with a separate metatable) use the __tostring() metamethod of this metatable, and add a touch of it's own? For example, it would return what Table's tostring method plus a number
local otherTable_mt=
{
__index = otherTable,
__tostring = function(tab)
return MYSTERY..tab.number; --MYSTERY is the call on the __tostring() of Table_mt
end
}
0
You could temporarily set the metatable of tab to the one of Table and then reset it, but I feel like that is a bit too far randomsmileyface 375 — 8y
1 answer
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0
Just index and call the __tostring function of Table_mt as usual. Metatables act like any other table.
local tab = {name = "hello!"}
local Table_mt = {
__index = Table,
__tostring = function(tab)
return tab.name
end
}
local otherTable_mt = {
__index = otherTable,
__tostring = function(tab)
return Table_mt.__tostring(tab)..69 -- appends 69 to the string
end
}
setmetatable(tab, otherTable_mt)
print(tab)
prints:
hello!69