Titlebook: Interpreting LISP; Programming and Data Gary D. Knott Book 2017Latest edition Gary D. Knott 2017 lisp.programming.language.software.functio

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Defining Special Forms,unnamed-special-form-typed-pointer to the dotted-pair of the input arguments is returned, so that the result will, upon later use, be interpreted as a special form rather than a function. An unnamed-special-form-typed-pointer has the typecode 15.

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The Label Special Form,l forms this way in practice. But this leaves a theoretical difficulty about the LAMBDA operator, namely, we must use SETQ and assign a name in order to define a recursive function. Thus not every desired function can, in theory, be written in place as a λ-expression. In order to remove this difficu

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Binding Actual Values to Formal Arguments,rguments to formal arguments and to honor the contexts thus established during the time that a related λ-expression is being evaluated. There are several ways to do this. The earliest approach, which was employed in the original LISP Interpreter for the IBM 704 and 709, was to maintain a so-called a

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Arguments and Results Are Typed-Pointers,ointer to that result S-expression or function is returned. When the final result is computed, the typed-pointer to the final result is used to reach the pointed-to data object, which is then inspected in order to print out its complete lexical representation as the final deliverable.

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List Notation, parentheses and the dots occur at lower levels. Any element Si that qualifies may itself be written in either list notation or dotted-pair notation. But, remember, not every nonatomic S-expression is representable as a list.

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Book 2017Latest edition applications. This short primer contains a careful description of the data structures manipulated by Lisp functions. These data structures and others, notably hash tables, are also used in constructing a Lisp interpreter.  .Interpreting Lisp. will be of special interest to those learning and using

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S-Expressions, Indeed, as mentioned earlier, LISP derives its name from the phrase “list processing.” Atoms and nonatomic S-expressions, taken together, form the class of data objects whose members are called S-expressions. The term S-expression is short for the phrase symbolic expression.

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More About Typed-Pointers,w, at least potentially, the name or lexical expression associated with any value being manipulated, and every such value is represented by a typed-pointer to some complete representation of that value.

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