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Constraint-relation

Make-constraint-relation

Basic constructor macro for constraint-relation structures.

Syntax

(make-constraint-relation [:name <name>] 
                          [:args <args>])

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

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

Definition

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

Macro: make-constraint-relation

(defmacro make-constraint-relation (&rest args)
  (std::make-aggregate 'constraint-relation
                       args '((:name) (:args))
                       'make-constraint-relation
                       nil))

Function: constraint-relation

(defun constraint-relation (name args)
  (declare (xargs :guard (and (stringp name)
                              (expression-listp args))))
  (declare (xargs :guard t))
  (let ((__function__ 'constraint-relation))
    (declare (ignorable __function__))
    (b* ((name (mbe :logic (str-fix name) :exec name))
         (args (mbe :logic (expression-list-fix args)
                    :exec args)))
      (cons :relation (list name args)))))