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use std::fmt; #[derive(Clone, Debug, Default, PartialEq)] pub struct Location { row: usize, column: usize, } impl fmt::Display for Location { fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result { write!(f, "line {} column {}", self.row, self.column) } } impl Location { pub fn new(row: usize, column: usize) -> Self { Location { row, column } } pub fn row(&self) -> usize { self.row } pub fn column(&self) -> usize { self.column } pub fn reset(&mut self) { self.row = 1; self.column = 1; } pub fn go_right(&mut self) { self.column += 1; } pub fn newline(&mut self) { self.row += 1; self.column = 1; } }