		Search-engine friendly clone of the ACL2 documentation.

Expression-unary

Make-expression-unary

Basic constructor macro for expression-unary structures.

Syntax

(make-expression-unary [:op <op>] 
                       [:arg <arg>])

This is the usual way to construct expression-unary structures. It simply conses together a structure with the specified fields.

This macro generates a new expression-unary structure from scratch. See also change-expression-unary, which can "change" an existing structure, instead.

Definition

This is an ordinary make- macro introduced by fty::defprod.

Macro: make-expression-unary

(defmacro make-expression-unary (&rest args)
  (std::make-aggregate 'expression-unary
                       args '((:op) (:arg))
                       'make-expression-unary
                       nil))

Function: expression-unary

(defun expression-unary (op arg)
  (declare (xargs :guard (and (unopp op) (expressionp arg))))
  (declare (xargs :guard t))
  (let ((__function__ 'expression-unary))
    (declare (ignorable __function__))
    (b* ((op (mbe :logic (unop-fix op) :exec op))
         (arg (mbe :logic (expression-fix arg)
                   :exec arg)))
      (cons :unary (list op arg)))))