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Branch

Make-branch

Basic constructor macro for branch structures.

Syntax

(make-branch [:condition <condition>] 
             [:action <action>])

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

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

Definition

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

Macro: make-branch

(defmacro make-branch (&rest args)
  (std::make-aggregate 'branch
                       args '((:condition) (:action))
                       'make-branch
                       nil))

Function: branch

(defun branch (condition action)
  (declare (xargs :guard (and (expressionp condition)
                              (expressionp action))))
  (declare (xargs :guard t))
  (let ((__function__ 'branch))
    (declare (ignorable __function__))
    (b* ((condition (mbe :logic (expression-fix condition)
                         :exec condition))
         (action (mbe :logic (expression-fix action)
                      :exec action)))
      (list (cons 'condition condition)
            (cons 'action action)))))