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Expression-sum-update

Make-expression-sum-update

Basic constructor macro for expression-sum-update structures.

Syntax

(make-expression-sum-update [:type <type>] 
                            [:target <target>] 
                            [:alternative <alternative>] 
                            [:fields <fields>])

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

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

Definition

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

Macro: make-expression-sum-update

(defmacro make-expression-sum-update (&rest args)
  (std::make-aggregate 'expression-sum-update
                       args
                       '((:type)
                         (:target)
                         (:alternative)
                         (:fields))
                       'make-expression-sum-update
                       nil))

Function: expression-sum-update

(defun expression-sum-update (type target alternative fields)
  (declare (xargs :guard (and (identifierp type)
                              (expressionp target)
                              (identifierp alternative)
                              (initializer-listp fields))))
  (declare (xargs :guard t))
  (let ((__function__ 'expression-sum-update))
    (declare (ignorable __function__))
    (b* ((type (mbe :logic (identifier-fix type)
                    :exec type))
         (target (mbe :logic (expression-fix target)
                      :exec target))
         (alternative (mbe :logic (identifier-fix alternative)
                           :exec alternative))
         (fields (mbe :logic (initializer-list-fix fields)
                      :exec fields)))
      (cons :sum-update (list type target alternative fields)))))