57 posts
Germany
Posted 09 August 2018 - 08:58 PM
EDIT: Didn't want to open another thread because this is somewhat related, have a look at my current problem all the way down.
Hi Guys,
I need to run code from a string (e.g. "if true then print("bla") end"). loadstring() doesn't work for me since I need to call functions that are not global but only exist within my program. I found a script by Lupus590 which works perfectly, but somehow tables don't work.
This prints "Hello World" like I want it to.
[namedspoiler=This doesn't work][CODE]
local foo = {["bar"] = "Hello World"}
function test(text)
print(text)
end
——————Lupus script———————-
local HOST_ENV = _ENV or getfenv() – this is global
local OUR_ENV = {}
setmetatable(OUR_ENV, {__index = HOST_ENV, OUR_ENV = OUR_ENV})
setfenv(1, OUR_ENV) – make the rest of this code use this environment
local function compile(chunk) – returns compiled chunk or nil and error message
if type(chunk) ~= "string" then
error("expected string, got ".. type(chunk), 2)
end
local function findChunkName(var)
for k,v in pairs(HOST_ENV) do
if v==var then
return k
end
end
return "Unknown chunk"
end
return load(chunk, findChunkName(chunk), "t", OUR_ENV)
end
————————————————–
compile("test(foo.bar)")()
[/CODE][/namedspoiler]
This throws an [color=#ff0000][CODE]Unknown chunk:1: attempt to index ? (a nil value)[/CODE] [/color]error
I know it's not good to use scripts that you don't understand, but I tried to and couldn't because the documentation of load() is so bad. Does anybody understand why this is happening and if there is a way to fix it?
Thanks in advance!
Bruno
Hi Guys,
I need to run code from a string (e.g. "if true then print("bla") end"). loadstring() doesn't work for me since I need to call functions that are not global but only exist within my program. I found a script by Lupus590 which works perfectly, but somehow tables don't work.
This works
local foo = "Hello World"
function test(text)
print(text)
end
------------------Lupus script----------------------
local HOST_ENV = _ENV or getfenv() -- this is global
local OUR_ENV = {}
setmetatable(OUR_ENV, {__index = HOST_ENV, OUR_ENV = OUR_ENV})
setfenv(1, OUR_ENV) -- make the rest of this code use this environment
local function compile(chunk) -- returns compiled chunk or nil and error message
if type(chunk) ~= "string" then
error("expected string, got ".. type(chunk), 2)
end
local function findChunkName(var)
for k,v in pairs(HOST_ENV) do
if v==var then
return k
end
end
return "Unknown chunk"
end
return load(chunk, findChunkName(chunk), "t", OUR_ENV)
end
--------------------------------------------------
compile("test(foo)")()
[namedspoiler=This doesn't work][CODE]
local foo = {["bar"] = "Hello World"}
function test(text)
print(text)
end
——————Lupus script———————-
local HOST_ENV = _ENV or getfenv() – this is global
local OUR_ENV = {}
setmetatable(OUR_ENV, {__index = HOST_ENV, OUR_ENV = OUR_ENV})
setfenv(1, OUR_ENV) – make the rest of this code use this environment
local function compile(chunk) – returns compiled chunk or nil and error message
if type(chunk) ~= "string" then
error("expected string, got ".. type(chunk), 2)
end
local function findChunkName(var)
for k,v in pairs(HOST_ENV) do
if v==var then
return k
end
end
return "Unknown chunk"
end
return load(chunk, findChunkName(chunk), "t", OUR_ENV)
end
————————————————–
compile("test(foo.bar)")()
[/CODE][/namedspoiler]
This throws an [color=#ff0000][CODE]Unknown chunk:1: attempt to index ? (a nil value)[/CODE] [/color]error
I know it's not good to use scripts that you don't understand, but I tried to and couldn't because the documentation of load() is so bad. Does anybody understand why this is happening and if there is a way to fix it?
Thanks in advance!
Bruno
Edited on 20 August 2018 - 06:14 PM
