Prototypes

Prototype.<type> name(<parameter>, [, <parameter> [= DefaultValue]...])

For advanced programmers. Prototype allows to declare a type which will map a function. It's useful when used with a variable, to do a function pointer (the variable value will be the address the function to call, and can be changed at will).

The last parameters can have a default value (need to be a constant expression), so if these parameters are omitted when the function is called, the default value will be used.

Example

  Prototype ProtoMax(Value, Print = #False)

  Procedure Max1(Value, Print)
    Debug "Max1 : " + Value
  EndProcedure

  Procedure Max2(Value, Print)
    Debug "Max2 : " + Value
  EndProcedure

  Max.ProtoMax = @Max1() ; Set the function pointer
  Max(10)

  Max.ProtoMax = @Max2() ; Change the function pointer
  Max(20) ; the function call doesn't change