ifFunction

Interface equivalent for intrinsic type Function.

Implemented by

Supported methods

GetSub() As Function

You can get a plain (non-referenced) version of the value by calling the this method.

SetSub(value As Function) As Void

This method can be used for in/out function parameters. If you have a boxed object, you can change the value in the object via this method, without changing the variable reference itself.

function Main()
    f1 = Foo
    print "f1 "; Type(f1); "="; f1

    f2 = Box(Foo)
    print "f2 "; Type(f2); "="; f2

    print "adjusting f2"
    AdjustFun(f2)

    print "f2 "; Type(f2); "="; f2
    print "f2()"; "="; f2()

    f3 = f2.GetSub()
    print "f3 "; Type(f3); "="; f3
end function

function AdjustFun(f)
    f.SetSub(Bar)
end function

function Foo()
    return "--Foo--"
end function

function Bar()
    return "--Bar--"
end function
==>
f1 Function=<Function: foo>
f2 roFunction=<Function: foo>
adjusting f2
f2 roFunction=<Function: bar>
f2()=--Bar--
f3 Function=<Function: bar>