Re: A question about function accessing local and global variables

[zejian ju <juzejian@...>]

2015-08-26 9:53 GMT+08:00 Nan Xiao <xiaonan830818@gmail.com>:

Hi all,

I am a little confused about the following code in Pil:

    i = 32
    local i = 0
    f = load("i = i + 1; print(i)")
    g = function () i = i + 1; print(i) end
    f() --> 33
    g() --> 1

Why does function g() always get local i, not global i? If function
g() wants to
get the global i, how does it do?

 

g is a closure defined in parent scope where local i is an upvalue.

_G.i can be used to access the global i.