Add non trivial elements iterator

Author: maxtremblay

src/matrix/mod.rs

@@ -17,6 +17,9 @@ use constructor_utils::initialize_from;
 mod gauss_jordan;
 use gauss_jordan::GaussJordan;
 
+mod non_trivial_elements;
+pub use self::non_trivial_elements::NonTrivialElements;
+
 mod nullspace;
 use nullspace::nullspace;
 

src/matrix/non_trivial_elements.rs

@@ -0,0 +1,27 @@
+use super::SparseBinMat;
+use crate::SparseBinSlice;
+
+/// An iterator over the coordinates of non trivial elements.
+///
+/// See the [`non_trivial_elements`](SparseBinMat::non_trivial_elements) method.
+#[derive(Debug, Clone)]
+pub struct NonTrivialElements<'a> {}
+
+impl<'a> NonTrivialElements<'a> {
+    pub(super) fn new(matrix: &'a SparseBinMat) -> Self {}
+
+    fn move_to_next_row(&mut self) {
+        todo!()
+    }
+}
+
+impl<'a> Iterator for NonTrivialElements<'a> {
+    type Item = (usize, usize);
+
+    fn next(&mut self) -> Option<Self::Item> {}
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+}