Using a constant to define another one

General
1

In a project, I create a folder (using the application name) in the ApplicationData folder. Then I store two service data files.

I set that folder’s name in a constant and while I was there, I added two other constants for the two service data files.

I wanted to prefix these two files using the constant I filled to create the folder, appending a specific name and the file extension just like:

kIdiotProof = "Idiot Proof" * kIPServFile = kIdiotProof + " - Data.txt" * kIPPrefs = kIdiotProof + " - Prefs.prefs" *

  • without the double quotes

This compiles just fine, but the results are *:

"kIdiotProof + - Data.txt" "kIPPrefs = kIdiotProof + - Prefs.prefs"
Not exactly what I want.

What is wrong ?

2

a constant is a constant, it can’t be a result of some operation.

But you can create a prebuild script that redefine you computed constant

3

Thank you Antonio for your kind answer.

Any tip on how I can do that ?

4

You can use a computed property to do the same thing (or a method)

5

I can explore these…

Thanks shao

6

The script could be like this: (in this example the constants are all in a Module named Module1)

constantValue("Module1.kIPServFile")=constantValue("Module1.kIdiotProof")+ " - Data.txt" constantValue("Module1.kIPPrefs")=constantValue("Module1.kIdiotProof")+ " - Prefs.prefs"

As Shao wrote, in this case maybe is better a method:

function IPServFile() as string return kIdiotProof+ " - Data.txt" end function
and so on

The script suggestion is still valid especially if the constant value is computed base on some “build time” condition.

7

Thank you.