1package ast
 2
 3type Source struct {
 4	Name  string
 5	Input string
 6}
 7
 8type Position struct {
 9	Start  int     // The starting position, in runes, of this token in the input.
10	End    int     // The end position, in runes, of this token in the input.
11	Line   int     // The line number at the start of this item.
12	Column int     // The line number at the start of this item.
13	Src    *Source // The source document this token belongs to
14}