Umple E012 Class Indirectly Subclass of Self
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E012 Class Indirectly Subclass of Self
Umple semantic error reported when a class is designated as a subclass of itself, through some other class.
The inheritance hierarchy cannot have cycles. It must be a strict tree. It is therefore not allowed to make a cycle or loop, in which a class is indirectly a subclass of itself.
Example
// This example generates the error message
class A {
isA C;
}
class B {
isA A;
}
class C {
isA B;
}
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Solution to The Above So the Message No Longer Appears
// The following shows how to avoid the error
class A {
}
class B {
isA A;
}
class C {
isA B;
}
Load the above code into UmpleOnline