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Allegro CL |
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 Lists
3.4.4.1.1.1 Examples of Data-directed Destructuring by Lambda ListsAn example pattern is(a b c) which destructures a list of three elements. The variable a is assigned to the first element, b to the second, etc. A more complex example is ((first . rest) . more) The important features of data-directed destructuring are its syntactic simplicity and the ability to extend it to lambda-list-directed destructuring. |