Procedures

Procedures are an alternative to methods. Both have the same functionality, but procedures are not attached to classes or instances. They can, however, be declared inside a class. In that case, the procedure can only be called from code within the class and can reference class properties and class-specific tokens like self and super.

You can make a procedure public (usable by other scripts) by listing it in the public section of a script and giving it an export index.

You can declare temporary variables (local to the procedure) by including a &tmp token after the procedure parameters, and following it with a list of temp variable declarations.

Syntax:

(procedure (<ProcedureName> [<ParamName1> <ParamName2> ... &tmp <TempVar1> <TempVar2> ...])
        <code>
)

Examples:

(procedure (SomeProc)
        (PrintingProc "Hello World" 60 80)
)

; This is a public procedure so any other script can use it
(public
        PrintingProc 0
)
(procedure (PrintingProc String X Y &tmp result)
        (= result (+ 1 2 3))
        (Display String dsCOORD X Y)
)

; An example of using it with a class
(class SomeClass
        (properties
                top 20
                left 0
                bottom 100
                right 40
        )
        (method (someMethod)
                (someProc)
        )

        (procedure (someProc)
                (= top 50)              ; sets SomeClass:top to 50
                (= right 100)   ; sets SomeClass:right to 100
        )
)