use std::collections::HashMap;
use std::fmt;

use crate::ast::ItemId;

#[derive(Debug, Clone, Copy, PartialEq)]
pub struct Location {
  pub line_num: usize,
  pub char_num: usize
}

impl fmt::Display for Location {
  fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
    write!(f, "{}:{}", self.line_num, self.char_num)
  }
}

pub struct SourceMap {
  map: HashMap<ItemId, Location>
}

impl SourceMap {
  pub fn new() -> SourceMap {
    SourceMap { map: HashMap::new() }
  }
}