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The $\rm Object$ class is the root of the inheritance graph. Even the other basic classes (e.g., $\rm IO$ and $\rm Int$) inherit from $\rm Object$ (and thus inherit the three methods listed below). It is an error to redefine $\rm Object$. Methods with the following declarations are defined:

abort() : Object
type_name() : String
copy() : SELF_TYPE

The method $\rm abort$ flushes all output and then halts program execution with the error message $\rm \LQT abort \backslash n \RQT$.

The method $\rm type\_name$ returns a string with the name of the (run-time, dynamic) class of the object.

The method $\rm copy$ produces a $\it shallow$ copy of the object.(4)

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