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• Basic-printing

Vl-indent

(vl-indent n &key (ps 'ps)) indents to column n.

Signature

(vl-indent n &key (ps 'ps)) → ps

Arguments

n — Guard (natp n).

In text mode we indent by printing spaces; in HTML mode we instead print   characters. Note that this function has no effect if we are already past column n.

Definitions and Theorems

Function: vl-indent-fn

(defun
 vl-indent-fn (n ps)
 (declare (xargs :stobjs (ps)))
 (declare (xargs :guard (natp n)))
 (declare (type unsigned-byte n))
 (let
  ((__function__ 'vl-indent))
  (declare (ignorable __function__))
  (b*
   ((rchars (vl-ps->rchars))
    ((the unsigned-byte col) (vl-ps->col))
    (htmlp (vl-ps->htmlp))
    ((the unsigned-byte n) (lnfix n)))
   (cond
    ((>= col n) ps)
    (htmlp
     (vl-ps-seq (vl-ps-update-rchars (make-list-ac (- n col)
                                                   " " rchars))
                (vl-ps-update-col n)))
    (t
     (vl-ps-seq
       (vl-ps-update-rchars (make-list-ac (- n col) #\Space rchars))
       (vl-ps-update-col n)))))))

Theorem: vl-indent-fn-of-nfix-n

(defthm vl-indent-fn-of-nfix-n
        (equal (vl-indent-fn (nfix n) ps)
               (vl-indent-fn n ps)))

Theorem: vl-indent-fn-nat-equiv-congruence-on-n

(defthm vl-indent-fn-nat-equiv-congruence-on-n
        (implies (acl2::nat-equiv n n-equiv)
                 (equal (vl-indent-fn n ps)
                        (vl-indent-fn n-equiv ps)))
        :rule-classes :congruence)