package orsetto

A value conceptually annotated with its position in the input.

Scanners use imp value to create a value form with a distinguished implicit position, i.e. not located in the input stream.

Scanners use dn form to get the value wrapped in form.

Scanners use mv value form to make a form containing value attributed with the same position as form.

Scanners use span a b value to make a form containing value attributed to the span of positions from a to b.