class Base
{
	var value = 456
	routine Meth2(){ io.writeln( self, value ) }
}

#
# Classes to be used as mixin bases can be specified in a pair of brackets
# following the class name. Only classes without parent classes can
# be used as mixins.
#
class Mixin ( Base )
{
	var index = 123

	routine Meth(){ io.writeln( self, index, value ) }
	routine Meth2( a : string ){ io.writeln( self, index, value, a ) }
}

#
# The "Base" class will be presented only once in "Klass":
#
class Klass ( Base, Mixin )
{
	var index = 123456
	routine Meth2( a : int ){ io.writeln( self, index, value, a ) }
}

var k = Klass()

io.writeln( k.index )

k.Meth()
k.Meth2()
k.Meth2( "abc" )
k.Meth2( 789 )