debug/setupvalue

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(Undo revision 19209 by Yupi2 (talk))
m (Another correction)
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|type=number
 
|type=number
 
|name=up
 
|name=up
|desc=The index upwards from the function f.
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|desc=The index from the function 'f'.
 
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}}
 
{{Arg
 
{{Arg

Revision as of 14:36, 21 January 2015

 debug.setupvalue( )

Contents

Description

Sets the variable indexed by 'up' from function 'f' to 'newValue'.

Arguments

function f

The function to index the upvalue from.

Arguments

number up

The index from the function 'f'.

Arguments

any newValue=nil

The value to set the upvalue to.

Returns

string

Returns nil if there is no upvalue with the given index, otherwise it returns the upvalue's name.

Examples

Example

An example demonstrating a function overwrite.

local function my_isfunction(f)
	return type(f) == "function" or f == "coolguy"	
end

print(debug.setupvalue(hook.Add, 1, my_isfunction))

Output:

isfunction
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