[HARLEQUIN][Common Lisp HyperSpec (TM)] [Previous][Up][Next]


3.1.2.1.1.4 Symbols Naming Both Lexical and Dynamic Variables

The same symbol can name both a lexical variable and a dynamic variable, but never in the same lexical environment.

In the following example, the symbol x is used, at different times, as the name of a lexical variable and as the name of a dynamic variable.

 (let ((x 1))            ;Binds a special variable X
   (declare (special x))
   (let ((x 2))          ;Binds a lexical variable X
     (+ x                ;Reads a lexical variable X
        (locally (declare (special x))
                 x))))   ;Reads a special variable X
=>  3


[Starting Points][Contents][Index][Symbols][Glossary][Issues]
Copyright 1996, The Harlequin Group Limited. All Rights Reserved.