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Constants defined n Ravel?

Is there a way to define constants in Ravel? I have some numbers that I would like to define in one place for use in the code. They are not constraints so I do not want to define them as such since that would make it possible to change the values.

Bjoern L over 12 years ago

Martin,
You can use macros to define constants. Simply define a macro of no arguments returning the constant value. To retrieve the value, call the macro. Here is an example:
(macro PI () 3.141593)
(define edge_circumference
(transform (e) circular_edge
(e 2 * (PI) * (radius e))))
Kind regards, Björn
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Martin Biehl over 12 years ago

Thanks Bjoern for your quick reply.
Kind Regards,
Martin
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