src/code/destructuring-bind.lisp

   1 ;;;; This software is part of the SBCL system. See the README file for
   2 ;;;; more information.
   3 ;;;;
   4 ;;;; This software is derived from the CMU CL system, which was
   5 ;;;; written at Carnegie Mellon University and released into the
   6 ;;;; public domain. The software is in the public domain and is
   7 ;;;; provided with absolutely no warranty. See the COPYING and CREDITS
   8 ;;;; files for more information.
   9
  10 (in-package "SB!IMPL")
  11
  12 (defmacro-mundanely destructuring-bind (lambda-list expression &body body)
  13   #!+sb-doc
  14   "Bind the variables in LAMBDA-LIST to the corresponding values in the
  15 tree structure resulting from the evaluation of EXPRESSION."
  16   ;; (THE LIST ...) is not really right, because it means that
  17   ;; the descriptive message about the lambda list won't be shown.
  18   ;; It'll just be type-error.
  19   `(binding* ,(sb!c::expand-ds-bind lambda-list
  20                                     `(the list ,expression)
  21                                     t nil)
  22              ,@body))