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• Parser-states

Position-inc-column

Increment a position by a number of columns.

Signature

(position-inc-column columns pos) → new-pos

Arguments

columns — Guard (natp columns).

pos — Guard (positionp pos).

Returns

new-pos — Type (positionp new-pos).

The line number is unchanged.

Definitions and Theorems

Function: position-inc-column$inline

(defun position-inc-column$inline (columns pos)
  (declare (xargs :guard (and (natp columns) (positionp pos))))
  (change-position
       pos
       :column (+ (the unsigned-byte (position->column pos))
                  (the unsigned-byte columns))))

Theorem: positionp-of-position-inc-column

(defthm positionp-of-position-inc-column
  (b* ((new-pos (position-inc-column$inline columns pos)))
    (positionp new-pos))
  :rule-classes :rewrite)

Theorem: position-inc-column$inline-of-position-fix-pos

(defthm position-inc-column$inline-of-position-fix-pos
  (equal (position-inc-column$inline columns (position-fix pos))
         (position-inc-column$inline columns pos)))

Theorem: position-inc-column$inline-position-equiv-congruence-on-pos

(defthm position-inc-column$inline-position-equiv-congruence-on-pos
  (implies (position-equiv pos pos-equiv)
           (equal (position-inc-column$inline columns pos)
                  (position-inc-column$inline columns pos-equiv)))
  :rule-classes :congruence)