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DarkBASIC Professional Discussion / #CONSTANT question

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Vandetta
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Posted: 22nd Dec 2002 13:18
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Is it possible to assign a value to a constant from a value returned from a function? Example:

#CONSTANT MyConst TIMER()

If not, is it possible to make a variable that can only be written to once?
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IanM
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Posted: 22nd Dec 2002 13:20
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No. All #constant does is a simple text substitution. Using your example, everywhere you use MyConst in your code will be replaced during compilation by TIMER().

If you want a write-once variable, you are going to have to control it yourself - maybe in a function.
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n3t3r453r
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Posted: 22nd Dec 2002 13:40
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OK. And are there any other preprocessor functions in DBpro, like in C/CPP such as #error or pragma or #define and ect.?
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IanM
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Posted: 22nd Dec 2002 13:44
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Just #constant and #incldue at the moment I think.

I would be great to have a proper pre-processor so that you could have different sections of code, depending on compiler options. And if it was a stand-alone pre-processor, it could easily be used with DBv1 too.
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