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The classes <code>t</code> and <code>null</code> are widely exploited in Lisp OO programming. |
The classes <code>t</code> and <code>null</code> are widely exploited in Lisp OO programming. |
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=={{header|ComponentPascal}}== |
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<lang ComponentPascal> |
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MODULE ObjectNil; |
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IMPORT StdLog; |
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TYPE |
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Object = POINTER TO ObjectDesc; |
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ObjectDesc = RECORD |
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END; |
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VAR |
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x: Object; |
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BEGIN |
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IF x = NIL THEN |
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StdLog.String("x is NIL");StdLog.Ln |
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END |
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END ObjectNil. |
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</lang> |
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=={{header|D}}== |
=={{header|D}}== |
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