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Reflections on metaclass programming in SOM
<span title="">1994</span>
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<a target="_blank" rel="noopener" href="https://fatcat.wiki/container/6y3m32grtnfktkp2oo6oqjbvta" style="color: black;">Proceedings of the ninth annual conference on Object-oriented programming systems, language, and applications - OOPSLA '94</a>
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This paper reports on the evolution of metaclass programming in SOM (the IBM System Object Model). Initially, SOM's use of explicit men&asses introduced metaclass incompatibilities. This was cured by having SOM dynamically derive an appropriate metaclass by interpreting the "metaclass declaration" as a constraint. In effect, inheritance is given a new dimension, because the constraint is also inherited. The derived metaclass is the least solution to all these constraints. Subsequently, this
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... led to the possibility of metaclasses conflicting over the need to assign meaning to a method. The cure for this problem is a framework that facilitates the programming of metaclasses that cooperate on the assignment of meaning to methods.
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