Fix Matrix PartialEq bug and add some generalization (#692)

Fix Matrix PartialEq bug and add some generalization

src/base/matrix.rs

@@ -1344,18 +1344,19 @@ where
     S: Storage<N, R, C>,
 {}
 
-impl<N, R: Dim, C: Dim, S> PartialEq for Matrix<N, R, C, S>
+impl<N, R, R2, C, C2, S, S2> PartialEq<Matrix<N, R2, C2, S2>> for Matrix<N, R, C, S>
 where
-    N: Scalar,
+    N: Scalar + PartialEq,
+    C: Dim,
+    C2: Dim,
+    R: Dim,
+    R2: Dim,
     S: Storage<N, R, C>,
+    S2: Storage<N, R2, C2>
 {
     #[inline]
-    fn eq(&self, right: &Matrix<N, R, C, S>) -> bool {
-        assert!(
-            self.shape() == right.shape(),
-            "Matrix equality test dimension mismatch."
-        );
-        self.iter().zip(right.iter()).all(|(l, r)| l == r)
+    fn eq(&self, right: &Matrix<N, R2, C2, S2>) -> bool {
+        self.shape() == right.shape() && self.iter().zip(right.iter()).all(|(l, r)| l == r)
     }
 }
 

tests/core/matrix.rs

@@ -1,12 +1,15 @@
 use num::{One, Zero};
 use std::cmp::Ordering;
 
-use na::dimension::{U15, U8};
+use na::dimension::{U15, U8, U2, U4};
 use na::{
     self, DMatrix, DVector, Matrix2, Matrix2x3, Matrix2x4, Matrix3, Matrix3x2, Matrix3x4, Matrix4,
     Matrix4x3, Matrix4x5, Matrix5, Matrix6, MatrixMN, RowVector3, RowVector4, RowVector5,
     Vector1, Vector2, Vector3, Vector4, Vector5, Vector6,
 };
+use typenum::{UInt, UTerm};
+use serde_json::error::Category::Data;
+use typenum::bit::{B0, B1};
 
 #[test]
 fn iter() {
@@ -1047,3 +1050,62 @@ mod finite_dim_inner_space_tests {
         true
     }
 }
+
+#[test]
+fn partial_eq_shape_mismatch() {
+    let a = Matrix2::new(1, 2, 3, 4);
+    let b = Matrix2x3::new(1, 2, 3, 4, 5, 6);
+    assert_ne!(a, b);
+    assert_ne!(b, a);
+}
+
+#[test]
+fn partial_eq_different_types() {
+    // Ensure comparability of several types of Matrices
+    let dynamic_mat = DMatrix::from_row_slice(2, 4, &[1, 2, 3, 4, 5, 6, 7, 8]);
+    let static_mat = Matrix2x4::new(1, 2, 3, 4, 5, 6, 7, 8);
+
+    let mut typenum_static_mat = MatrixMN::<u8, typenum::U1024, U4>::zeros();
+    let mut slice = typenum_static_mat.slice_mut((0,0), (2, 4));
+    slice += static_mat;
+
+    let fslice_of_dmat = dynamic_mat.fixed_slice::<U2, U2>(0, 0);
+    let dslice_of_dmat = dynamic_mat.slice((0, 0), (2, 2));
+    let fslice_of_smat = static_mat.fixed_slice::<U2, U2>(0, 0);
+    let dslice_of_smat = static_mat.slice((0, 0), (2, 2));
+
+    assert_eq!(dynamic_mat, static_mat);
+    assert_eq!(static_mat, dynamic_mat);
+
+    assert_eq!(dynamic_mat, slice);
+    assert_eq!(slice, dynamic_mat);
+
+    assert_eq!(static_mat, slice);
+    assert_eq!(slice, static_mat);
+
+    assert_eq!(fslice_of_dmat, dslice_of_dmat);
+    assert_eq!(dslice_of_dmat, fslice_of_dmat);
+
+    assert_eq!(fslice_of_dmat, fslice_of_smat);
+    assert_eq!(fslice_of_smat, fslice_of_dmat);
+
+    assert_eq!(fslice_of_dmat, dslice_of_smat);
+    assert_eq!(dslice_of_smat, fslice_of_dmat);
+
+    assert_eq!(dslice_of_dmat, fslice_of_smat);
+    assert_eq!(fslice_of_smat, dslice_of_dmat);
+
+    assert_eq!(dslice_of_dmat, dslice_of_smat);
+    assert_eq!(dslice_of_smat, dslice_of_dmat);
+
+    assert_eq!(fslice_of_smat, dslice_of_smat);
+    assert_eq!(dslice_of_smat, fslice_of_smat);
+
+    assert_ne!(dynamic_mat, dslice_of_smat);
+    assert_ne!(dslice_of_smat, dynamic_mat);
+
+    // TODO - implement those comparisons
+    // assert_ne!(static_mat, typenum_static_mat);
+    //assert_ne!(typenum_static_mat, static_mat);
+
+}

tests/core/serde.rs

@@ -14,7 +14,8 @@ macro_rules! test_serde(
         fn $test() {
             let v: $ty<f32> = rand::random();
             let serialized = serde_json::to_string(&v).unwrap();
-            assert_eq!(v, serde_json::from_str(&serialized).unwrap());
+            let deserialized: $ty<f32> = serde_json::from_str(&serialized).unwrap();
+            assert_eq!(v, deserialized);
         }
     )*}
 );
@@ -23,7 +24,8 @@ macro_rules! test_serde(
 fn serde_dmatrix() {
     let v: DMatrix<f32> = DMatrix::new_random(3, 4);
     let serialized = serde_json::to_string(&v).unwrap();
-    assert_eq!(v, serde_json::from_str(&serialized).unwrap());
+    let deserialized: DMatrix<f32> = serde_json::from_str(&serialized).unwrap();
+    assert_eq!(v, deserialized);
 }
 
 test_serde!(