fix: add missing lifetimes

Author: samueltardieu

src/grid.rs

@@ -333,7 +333,7 @@ impl Grid {
 
     /// Iterate over edges.
     #[must_use]
-    pub const fn edges(&self) -> EdgesIterator {
+    pub const fn edges(&self) -> EdgesIterator<'_> {
         EdgesIterator {
             grid: self,
             x: 0,
@@ -442,7 +442,7 @@ impl Grid {
 
     /// Iterate over vertices.
     #[must_use]
-    pub fn iter(&self) -> GridIterator {
+    pub fn iter(&self) -> GridIterator<'_> {
         self.into_iter()
     }
 

src/matrix.rs

@@ -640,12 +640,12 @@ impl<C> Matrix<C> {
     }
 
     /// Return an iterator on values, first row first.
-    pub fn values(&self) -> Iter<C> {
+    pub fn values(&self) -> Iter<'_, C> {
         self.data.iter()
     }
 
     /// Return a mutable iterator on values, first row first.
-    pub fn values_mut(&mut self) -> IterMut<C> {
+    pub fn values_mut(&mut self) -> IterMut<'_, C> {
         self.data.iter_mut()
     }