1.6.10. Get the next command parameter

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NEXTPARAMETER

This macro should be used to get access to the next command parameter. This macro should NOT be used in built-in function implemenation. The functions have only a single parameter, which is indeed an expression list. To access the parameters of a function use the macros PARAMETERLIST, CAR and CDR.

When you implement a command you can get the first parameter of a command using the macro PARAMETERNODE, PARAMETERLONG, PARAMETERDOUBLE or PARAMETERSTRING (see PARAMETERXXX). If the command has more than one parameters you should use the macro NEXTPARAMETER to step to the next parameter.


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