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use std::fmt;
use std::cmp::Ordering;
#[derive(Copy,Clone)]
pub struct Position {
pub line: u32,
pub column: u32,
}
impl Position {
pub fn new( line: u32, column: u32 ) -> Self {
Self {
line, column,
}
}
pub fn none() -> Self {
Self {
line: 0,
column: 0,
}
}
pub fn is_none(&self) -> bool {
self.line == 0 || self.column == 0
}
}
impl fmt::Debug for Position {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
if self.is_none() {
write!(f, "none")
} else {
write!(f, "{}:{}", self.line, self.column )
}
}
}
impl PartialOrd for Position {
fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
let ord = self.line.partial_cmp( &other.line );
if Some(Ordering::Equal) == ord {
self.column.partial_cmp( &other.column )
} else {
ord
}
}
}
impl Ord for Position {
fn cmp(&self, other: &Self) -> Ordering {
let ord = self.line.cmp( &other.line );
if Ordering::Equal == ord {
self.column.cmp( &other.column )
} else {
ord
}
}
}
impl PartialEq for Position {
fn eq(&self, other: &Self) -> bool {
self.line == other.line && self.column == other.column
}
}
impl Eq for Position {}
#[derive(Copy,Clone)]
pub struct Range {
start: Position,
end: Position,
}
impl Range {
pub fn new( start: Position, end: Position ) -> Self {
Self {
start, end,
}
}
pub fn include(&mut self, pos: &Position ) {
if *pos < self.start {
self.start = pos.clone();
}
if *pos > self.end {
self.end = pos.clone();
}
}
}
impl fmt::Debug for Range {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "{:?}-{:?}", self.start, self.end )
}
}
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