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@ -1,4 +1,8 @@
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use std::{borrow::Cow, cmp::Ordering};
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use std::{
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borrow::Cow,
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cmp::Ordering,
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ops::{Add, AddAssign, Sub, SubAssign},
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};
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use crate::{
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chars::char_is_line_ending,
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@ -16,6 +20,38 @@ pub struct Position {
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pub col: usize,
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}
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impl AddAssign for Position {
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fn add_assign(&mut self, rhs: Self) {
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self.row += rhs.row;
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self.col += rhs.col;
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}
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}
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impl SubAssign for Position {
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fn sub_assign(&mut self, rhs: Self) {
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self.row -= rhs.row;
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self.col -= rhs.col;
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}
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}
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impl Sub for Position {
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type Output = Position;
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fn sub(mut self, rhs: Self) -> Self::Output {
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self -= rhs;
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self
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}
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}
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impl Add for Position {
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type Output = Position;
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fn add(mut self, rhs: Self) -> Self::Output {
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self += rhs;
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self
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}
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}
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impl Position {
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pub const fn new(row: usize, col: usize) -> Self {
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Self { row, col }
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