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Allegro CL |
3 Evaluation and Compilation  3.4 Lambda Lists 3.4.4 Macro Lambda Lists 3.4.4.1 Destructuring by Lambda Lists
3.4.4.1.1 Data-directed Destructuring by Lambda ListsIn data-directed destructuring, the pattern is a sample object of the type to be decomposed. Wherever a component is to be extracted, a symbol appears in the pattern; this symbol is the name of the variable whose value will be that component. |