Hey guys,
I have an error and I dont know why… maybe you can explain what im doing wrong
Its a scope issue, the code is like so :
[lua]
local checkPossibleMatches – forward declaration
local flag=false
flag=checkPossibleMatches(“create”)
function checkPossibleMatches(theState)
– do something
end
[/lua]
I get the following error:
gameplay.lua:604: attempt to call upvalue ‘checkPossibleMatches’ (a nil value)
Since I declared the function at the beginning, why is this error showing up?
Cheers
Roy.
When you write flag = … then you call function which you declare underneath. I think you misunderstood the concept of forward declaration. It’s to say where function will be placed - just that. Code is executed line by line so you must assign function under variable and next call it.
Should be
local checkPossibleMatches -- forward declaration local flag=false checkPossibleMatches = function(theState) -- do something end flag=checkPossibleMatches("create")Ok man thanks, I know I can simply put it above, I just though If I declare it, I can use it anywhere I want…
Roy.
You can call it but if you call, it must be already there
Example
[lua]
local func
local function doSomething()
func()
end
func = function()
print(‘hello’)
end
doSomething()
[/lua]
When you write flag = … then you call function which you declare underneath. I think you misunderstood the concept of forward declaration. It’s to say where function will be placed - just that. Code is executed line by line so you must assign function under variable and next call it.
Should be
local checkPossibleMatches -- forward declaration local flag=false checkPossibleMatches = function(theState) -- do something end flag=checkPossibleMatches("create")Ok man thanks, I know I can simply put it above, I just though If I declare it, I can use it anywhere I want…
Roy.
You can call it but if you call, it must be already there
Example
[lua]
local func
local function doSomething()
func()
end
func = function()
print(‘hello’)
end
doSomething()
[/lua]