Resolve warnings in coordinates

coordinates/src/bin/default_map.rs

@@ -33,12 +33,12 @@ fn main() {
 
     let filename = args
         .next()
-        .map(|p| PathBuf::from(p))
+        .map(PathBuf::from)
         .expect("A filename is required");
     let size = args
         .next()
         .and_then(|s| s.parse::<usize>().ok())
         .unwrap_or(3);
     let map: hex_map::Map<MapVal> = hex_map::Map::new_hexagonal(size);
-    hex_map::write_file(filename, map);
+    hex_map::write_file(filename, map).expect("to write file");
 }

coordinates/src/hex.rs

@@ -10,10 +10,9 @@ Luminescent Dreams Tools is distributed in the hope that it will be useful, but
 You should have received a copy of the GNU General Public License along with Lumeto. If not, see <https://www.gnu.org/licenses/>.
 */
 
-/// Ĉi-tiu modulo enhavas la elementojn por kub-koordinato.
+/// This module contains the elements of cube coordinates.
 ///
 /// This code is based on https://www.redblobgames.com/grids/hexagons/
-use crate::Error;
 use std::collections::HashSet;
 
 /// An address within the hex coordinate system
@@ -62,7 +61,7 @@ impl AxialAddr {
     pub fn is_adjacent(&self, dest: &AxialAddr) -> bool {
         dest.adjacencies()
             .collect::<Vec<AxialAddr>>()
-            .contains(&self)
+            .contains(self)
     }
 
     /// Measure the distance to a destination
@@ -79,7 +78,7 @@ impl AxialAddr {
 
         positions.push(item);
 
-        while positions.len() > 0 {
+        while !positions.is_empty() {
             let elem = positions.remove(0);
             for adj in elem.adjacencies() {
                 if self.distance(&adj) <= distance && !results.contains(&adj) {

coordinates/src/hex_map.rs

@@ -14,7 +14,6 @@ use crate::{hex::AxialAddr, Error};
 use nom::{
     bytes::complete::tag,
     character::complete::alphanumeric1,
-    error::ParseError,
     multi::many1,
     sequence::{delimited, separated_pair},
     Finish, IResult, Parser,
@@ -81,7 +80,7 @@ pub fn parse_data<'a, A: Default + From<String>>(
     }
 
     let cells = data
-        .map(|line| parse_line::<A>(&line).unwrap())
+        .map(|line| parse_line::<A>(line).unwrap())
         .collect::<Vec<(AxialAddr, A)>>();
     let cells = cells.into_iter().collect::<HashMap<AxialAddr, A>>();
     Map { cells }

coordinates/src/lib.rs

@@ -9,9 +9,9 @@ Lumeto is distributed in the hope that it will be useful, but WITHOUT ANY WARRAN
 
 You should have received a copy of the GNU General Public License along with Lumeto. If not, see <https://www.gnu.org/licenses/>.
 */
-use thiserror;
+use thiserror::Error;
 
-#[derive(Debug, thiserror::Error)]
+#[derive(Debug, Error)]
 pub enum Error {
     #[error("IO error on reading or writing: {0}")]
     IO(std::io::Error),