Need help understanding testcomplete vbscript code

[Cujo]

I am looking through some existing code. What does this below piece code means? what exactly eval is doing here? i read that eval is used to evaluate any expression. 

Public Function Perform(moduleCode, input, output)
     Perform = eval(moduleCode & "(input, output)")
End Function

[tristaanogre]

What is listed in your code is not unique to TestComplete... all it is doing is simply evaluating a string that contains the parameters passed in from the function.  I'm guessing, from what I'm seeing, is "moduleCode" is some sort of function call and the "eval" is simply executing it.

[Marsha_R]

This site is a good reference for many languages.  

https://www.w3schools.com/asp/func_eval.asp

[shankar_r · Accepted solution]

I can give you an example with the code you are having.

Assume you code in Unit1

'Run the testit function
Public Function testit
	Call Perform("Unit1.testmyCode", "hi", "hello")
End Function

Public Function testmyCode(param1,param2)
	Log.Message("This is param 1 - " & param1)
	Log.Message("This is param 2 - " & param2)
End Function

Public Function Perform(moduleCode, input, output)
     Perform = eval(moduleCode & "(input, output)")
End Function

You will get output as below,

This is param 1 - hi 11:55:22 Normal 0.00
This is param 2 - hello 11:55:22 Normal 0.05