Re: A question about function accessing local and global variables

[Nan Xiao <xiaonan830818@...>]

Hi Jonathan, Luiz, Zejian,

I see! Thanks very much for all your comments!
Best Regards
Nan Xiao


On Wed, Aug 26, 2015 at 10:36 AM, zejian ju <juzejian@gmail.com> wrote:
>
>
> 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.
>