FUNctions

q = function(a) print(a) return a end
debug.setmetatable(q, {__add = function(a,b) print(a,b) return 1 end})
print("q: ", tostring(q), "\n")
print("q(\"Heya!\"): ", q("Heya!"), "\n")
print("q + 5: ", q + 5, "\n")
print("5 + q: ", 5 + q, "\n")

--[[--
    RESULT:
q:      function: 0x218d350

Heya!
q("Heya!"):     Heya!

function: 0x218d350     5
q + 5:  1

5       function: 0x218d350
5 + q:  1
--]]--