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• Parse-utils

Vl-linestart-indent

Compatible with seq. If we are at the first token on a line, return its column number. Otherwise return NIL.

Signature

(vl-linestart-indent &key (tokstream 'tokstream)) 
  → 
(mv errmsg startcol new-tokstream)

Returns

errmsg — Type (not errmsg).

startcol — Type (maybe-natp startcol).

new-tokstream — Type (equal new-tokstream tokstream).

Definitions and Theorems

Function: vl-linestart-indent-fn

(defun vl-linestart-indent-fn (tokstream)
  (declare (xargs :stobjs (tokstream)))
  (declare (xargs :guard t))
  (let ((__function__ 'vl-linestart-indent))
    (declare (ignorable __function__))
    (b* ((tokens (vl-tokstream->tokens))
         ((unless (and (consp tokens)
                       (vl-token->breakp (car tokens))))
          (mv nil nil tokstream))
         (echar1 (car (vl-token->etext (car tokens))))
         (col1 (vl-echarpack->col (vl-echar-raw->pack echar1))))
      (mv nil col1 tokstream))))

Theorem: not-of-vl-linestart-indent.errmsg

(defthm not-of-vl-linestart-indent.errmsg
  (b* (((mv ?errmsg ?startcol ?new-tokstream)
        (vl-linestart-indent-fn tokstream)))
    (not errmsg))
  :rule-classes :rewrite)

Theorem: maybe-natp-of-vl-linestart-indent.startcol

(defthm maybe-natp-of-vl-linestart-indent.startcol
  (b* (((mv ?errmsg ?startcol ?new-tokstream)
        (vl-linestart-indent-fn tokstream)))
    (maybe-natp startcol))
  :rule-classes :type-prescription)

Theorem: return-type-of-vl-linestart-indent.new-tokstream

(defthm return-type-of-vl-linestart-indent.new-tokstream
  (b* (((mv ?errmsg ?startcol ?new-tokstream)
        (vl-linestart-indent-fn tokstream)))
    (equal new-tokstream tokstream))
  :rule-classes :rewrite)