Björn De Meyer wrote:
you can still say
function fie()
local x=123
f = function() return %x end
x=456
print(f())
end
But that one seems to behave exactly the same as when not
using the %, namely it will print 456. Because of the lexical scoping
the x in the anonymous function is the local x of fie(). The value of
x is only "taken" when f() is called.
Looks like % is just accepted for compatibility,
but otherwise ignored (except the global upvalue message)
So your example creates a closure with or without the "%".
See:
function fie()
local x=789
f = function() return x end --global f
x=123
end
fie() -- call function which creates function f
print(f()) -- prints 123
x=456
print(f()) -- still prints 123
Eero