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(slib.info)Values

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Values
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  `(require 'values)'

 - Function: values obj ...
     `values' takes any number of arguments, and passes (returns) them
     to its continuation.

 - Function: call-with-values thunk proc
     THUNK must be a procedure of no arguments, and PROC must be a
     procedure.  `call-with-values' calls THUNK with a continuation
     that, when passed some values, calls PROC with those values as
     arguments.

     Except for continuations created by the `call-with-values'
     procedure, all continuations take exactly one value, as now; the
     effect of passing no value or more than one value to continuations
     that were not created by the `call-with-values' procedure is
     unspecified.