rustfmt

nalgebra-sparse/src/convert/impl_std_ops.rs

@@ -1,17 +1,17 @@
-use crate::coo::CooMatrix;
 use crate::convert::serial::*;
-use nalgebra::{Matrix, Scalar, Dim, ClosedAdd, DMatrix};
+use crate::coo::CooMatrix;
-use nalgebra::storage::{Storage};
-use num_traits::Zero;
-use crate::csr::CsrMatrix;
 use crate::csc::CscMatrix;
+use crate::csr::CsrMatrix;
+use nalgebra::storage::Storage;
+use nalgebra::{ClosedAdd, DMatrix, Dim, Matrix, Scalar};
+use num_traits::Zero;
 
 impl<'a, T, R, C, S> From<&'a Matrix<T, R, C, S>> for CooMatrix<T>
 where
     T: Scalar + Zero,
     R: Dim,
     C: Dim,
-    S: Storage<T, R, C>
+    S: Storage<T, R, C>,
 {
     fn from(matrix: &'a Matrix<T, R, C, S>) -> Self {
         convert_dense_coo(matrix)
@@ -29,7 +29,7 @@ where
 
 impl<'a, T> From<&'a CooMatrix<T>> for CsrMatrix<T>
 where
-    T: Scalar + Zero + ClosedAdd
+    T: Scalar + Zero + ClosedAdd,
 {
     fn from(matrix: &'a CooMatrix<T>) -> Self {
         convert_coo_csr(matrix)
@@ -38,7 +38,7 @@ where
 
 impl<'a, T> From<&'a CsrMatrix<T>> for CooMatrix<T>
 where
-    T: Scalar + Zero + ClosedAdd
+    T: Scalar + Zero + ClosedAdd,
 {
     fn from(matrix: &'a CsrMatrix<T>) -> Self {
         convert_csr_coo(matrix)
@@ -50,7 +50,7 @@ where
     T: Scalar + Zero,
     R: Dim,
     C: Dim,
-    S: Storage<T, R, C>
+    S: Storage<T, R, C>,
 {
     fn from(matrix: &'a Matrix<T, R, C, S>) -> Self {
         convert_dense_csr(matrix)
@@ -59,7 +59,7 @@ where
 
 impl<'a, T> From<&'a CsrMatrix<T>> for DMatrix<T>
 where
-    T: Scalar + Zero + ClosedAdd
+    T: Scalar + Zero + ClosedAdd,
 {
     fn from(matrix: &'a CsrMatrix<T>) -> Self {
         convert_csr_dense(matrix)
@@ -68,7 +68,7 @@ where
 
 impl<'a, T> From<&'a CooMatrix<T>> for CscMatrix<T>
 where
-    T: Scalar + Zero + ClosedAdd
+    T: Scalar + Zero + ClosedAdd,
 {
     fn from(matrix: &'a CooMatrix<T>) -> Self {
         convert_coo_csc(matrix)
@@ -77,7 +77,7 @@ where
 
 impl<'a, T> From<&'a CscMatrix<T>> for CooMatrix<T>
 where
-    T: Scalar + Zero
+    T: Scalar + Zero,
 {
     fn from(matrix: &'a CscMatrix<T>) -> Self {
         convert_csc_coo(matrix)
@@ -85,11 +85,11 @@ where
 }
 
 impl<'a, T, R, C, S> From<&'a Matrix<T, R, C, S>> for CscMatrix<T>
-    where
+where
     T: Scalar + Zero,
     R: Dim,
     C: Dim,
-        S: Storage<T, R, C>
+    S: Storage<T, R, C>,
 {
     fn from(matrix: &'a Matrix<T, R, C, S>) -> Self {
         convert_dense_csc(matrix)
@@ -97,8 +97,8 @@ impl<'a, T, R, C, S> From<&'a Matrix<T, R, C, S>> for CscMatrix<T>
 }
 
 impl<'a, T> From<&'a CscMatrix<T>> for DMatrix<T>
-    where
+where
-        T: Scalar + Zero + ClosedAdd
+    T: Scalar + Zero + ClosedAdd,
 {
     fn from(matrix: &'a CscMatrix<T>) -> Self {
         convert_csc_dense(matrix)
@@ -106,8 +106,8 @@ impl<'a, T> From<&'a CscMatrix<T>> for DMatrix<T>
 }
 
 impl<'a, T> From<&'a CscMatrix<T>> for CsrMatrix<T>
-    where
+where
-        T: Scalar
+    T: Scalar,
 {
     fn from(matrix: &'a CscMatrix<T>) -> Self {
         convert_csc_csr(matrix)
@@ -116,7 +116,7 @@ impl<'a, T> From<&'a CscMatrix<T>> for CsrMatrix<T>
 
 impl<'a, T> From<&'a CsrMatrix<T>> for CscMatrix<T>
 where
-    T: Scalar
+    T: Scalar,
 {
     fn from(matrix: &'a CsrMatrix<T>) -> Self {
         convert_csr_csc(matrix)

nalgebra-sparse/src/convert/serial.rs

@@ -7,8 +7,8 @@ use std::ops::Add;
 
 use num_traits::Zero;
 
-use nalgebra::{ClosedAdd, Dim, DMatrix, Matrix, Scalar};
 use nalgebra::storage::Storage;
+use nalgebra::{ClosedAdd, DMatrix, Dim, Matrix, Scalar};
 
 use crate::coo::CooMatrix;
 use crate::cs;
@@ -21,7 +21,7 @@ where
     T: Scalar + Zero,
     R: Dim,
     C: Dim,
-    S: Storage<T, R, C>
+    S: Storage<T, R, C>,
 {
     let mut coo = CooMatrix::new(dense.nrows(), dense.ncols());
 
@@ -52,12 +52,14 @@ where
 /// Converts a [`CooMatrix`] to a [`CsrMatrix`].
 pub fn convert_coo_csr<T>(coo: &CooMatrix<T>) -> CsrMatrix<T>
 where
-    T: Scalar + Zero
+    T: Scalar + Zero,
 {
-    let (offsets, indices, values) = convert_coo_cs(coo.nrows(),
+    let (offsets, indices, values) = convert_coo_cs(
+        coo.nrows(),
         coo.row_indices(),
         coo.col_indices(),
-                                                    coo.values());
+        coo.values(),
+    );
 
     // TODO: Avoid "try_from" since it validates the data? (requires unsafe, should benchmark
     // to see if it can be justified for performance reasons)
@@ -66,8 +68,7 @@ where
 }
 
 /// Converts a [`CsrMatrix`] to a [`CooMatrix`].
-pub fn convert_csr_coo<T: Scalar>(csr: &CsrMatrix<T>) -> CooMatrix<T>
+pub fn convert_csr_coo<T: Scalar>(csr: &CsrMatrix<T>) -> CooMatrix<T> {
-{
     let mut result = CooMatrix::new(csr.nrows(), csr.ncols());
     for (i, j, v) in csr.triplet_iter() {
         result.push(i, j, v.inlined_clone());
@@ -76,9 +77,9 @@ pub fn convert_csr_coo<T: Scalar>(csr: &CsrMatrix<T>) -> CooMatrix<T>
 }
 
 /// Converts a [`CsrMatrix`] to a dense matrix.
-pub fn convert_csr_dense<T>(csr:& CsrMatrix<T>) -> DMatrix<T>
+pub fn convert_csr_dense<T>(csr: &CsrMatrix<T>) -> DMatrix<T>
 where
-    T: Scalar + ClosedAdd + Zero
+    T: Scalar + ClosedAdd + Zero,
 {
     let mut output = DMatrix::zeros(csr.nrows(), csr.ncols());
 
@@ -95,7 +96,7 @@ where
     T: Scalar + Zero,
     R: Dim,
     C: Dim,
-    S: Storage<T, R, C>
+    S: Storage<T, R, C>,
 {
     let mut row_offsets = Vec::with_capacity(dense.nrows() + 1);
     let mut col_idx = Vec::new();
@@ -105,8 +106,8 @@ where
     // nalgebra's column-major storage. The alternative would be to perform an initial sweep
     // to count number of non-zeros per row.
     row_offsets.push(0);
-    for i in 0 .. dense.nrows() {
+    for i in 0..dense.nrows() {
-        for j in 0 .. dense.ncols() {
+        for j in 0..dense.ncols() {
             let v = dense.index((i, j));
             if v != &T::zero() {
                 col_idx.push(j);
@@ -125,12 +126,14 @@ where
 /// Converts a [`CooMatrix`] to a [`CscMatrix`].
 pub fn convert_coo_csc<T>(coo: &CooMatrix<T>) -> CscMatrix<T>
 where
-    T: Scalar + Zero
+    T: Scalar + Zero,
 {
-    let (offsets, indices, values) = convert_coo_cs(coo.ncols(),
+    let (offsets, indices, values) = convert_coo_cs(
+        coo.ncols(),
         coo.col_indices(),
         coo.row_indices(),
-                                                    coo.values());
+        coo.values(),
+    );
 
     // TODO: Avoid "try_from" since it validates the data? (requires unsafe, should benchmark
     // to see if it can be justified for performance reasons)
@@ -141,7 +144,7 @@ where
 /// Converts a [`CscMatrix`] to a [`CooMatrix`].
 pub fn convert_csc_coo<T>(csc: &CscMatrix<T>) -> CooMatrix<T>
 where
-    T: Scalar
+    T: Scalar,
 {
     let mut coo = CooMatrix::new(csc.nrows(), csc.ncols());
     for (i, j, v) in csc.triplet_iter() {
@@ -153,7 +156,7 @@ where
 /// Converts a [`CscMatrix`] to a dense matrix.
 pub fn convert_csc_dense<T>(csc: &CscMatrix<T>) -> DMatrix<T>
 where
-    T: Scalar + ClosedAdd + Zero
+    T: Scalar + ClosedAdd + Zero,
 {
     let mut output = DMatrix::zeros(csc.nrows(), csc.ncols());
 
@@ -166,19 +169,19 @@ where
 
 /// Converts a dense matrix to a [`CscMatrix`].
 pub fn convert_dense_csc<T, R, C, S>(dense: &Matrix<T, R, C, S>) -> CscMatrix<T>
-    where
+where
     T: Scalar + Zero,
     R: Dim,
     C: Dim,
-        S: Storage<T, R, C>
+    S: Storage<T, R, C>,
 {
     let mut col_offsets = Vec::with_capacity(dense.ncols() + 1);
     let mut row_idx = Vec::new();
     let mut values = Vec::new();
 
     col_offsets.push(0);
-    for j in 0 .. dense.ncols() {
+    for j in 0..dense.ncols() {
-        for i in 0 .. dense.nrows() {
+        for i in 0..dense.nrows() {
             let v = dense.index((i, j));
             if v != &T::zero() {
                 row_idx.push(i);
@@ -197,13 +200,15 @@ pub fn convert_dense_csc<T, R, C, S>(dense: &Matrix<T, R, C, S>) -> CscMatrix<T>
 /// Converts a [`CsrMatrix`] to a [`CscMatrix`].
 pub fn convert_csr_csc<T>(csr: &CsrMatrix<T>) -> CscMatrix<T>
 where
-    T: Scalar
+    T: Scalar,
 {
-    let (offsets, indices, values) = cs::transpose_cs(csr.nrows(),
+    let (offsets, indices, values) = cs::transpose_cs(
+        csr.nrows(),
         csr.ncols(),
         csr.row_offsets(),
         csr.col_indices(),
-                                                      csr.values());
+        csr.values(),
+    );
 
     // TODO: Avoid data validity check?
     CscMatrix::try_from_csc_data(csr.nrows(), csr.ncols(), offsets, indices, values)
@@ -212,27 +217,30 @@ where
 
 /// Converts a [`CscMatrix`] to a [`CsrMatrix`].
 pub fn convert_csc_csr<T>(csc: &CscMatrix<T>) -> CsrMatrix<T>
-    where
+where
-        T: Scalar
+    T: Scalar,
 {
-    let (offsets, indices, values) = cs::transpose_cs(csc.ncols(),
+    let (offsets, indices, values) = cs::transpose_cs(
+        csc.ncols(),
         csc.nrows(),
         csc.col_offsets(),
         csc.row_indices(),
-                                                      csc.values());
+        csc.values(),
+    );
 
     // TODO: Avoid data validity check?
     CsrMatrix::try_from_csr_data(csc.nrows(), csc.ncols(), offsets, indices, values)
         .expect("Internal error: Invalid CSR data during CSC->CSR conversion")
 }
 
-fn convert_coo_cs<T>(major_dim: usize,
+fn convert_coo_cs<T>(
+    major_dim: usize,
     major_indices: &[usize],
     minor_indices: &[usize],
-                     values: &[T])
+    values: &[T],
-    -> (Vec<usize>, Vec<usize>, Vec<T>)
+) -> (Vec<usize>, Vec<usize>, Vec<T>)
 where
-    T: Scalar + Zero
+    T: Scalar + Zero,
 {
     assert_eq!(major_indices.len(), minor_indices.len());
     assert_eq!(minor_indices.len(), values.len());

nalgebra-sparse/src/coo.rs

@@ -45,8 +45,7 @@ pub struct CooMatrix<T> {
     values: Vec<T>,
 }
 
-impl<T> CooMatrix<T>
+impl<T> CooMatrix<T> {
-{
     /// Construct a zero COO matrix of the given dimensions.
     ///
     /// Specifically, the collection of triplets - corresponding to explicitly stored entries -
@@ -78,11 +77,13 @@ impl<T> CooMatrix<T>
         use crate::SparseFormatErrorKind::*;
         if row_indices.len() != col_indices.len() {
             return Err(SparseFormatError::from_kind_and_msg(
-                InvalidStructure, "Number of row and col indices must be the same."
+                InvalidStructure,
+                "Number of row and col indices must be the same.",
             ));
         } else if col_indices.len() != values.len() {
             return Err(SparseFormatError::from_kind_and_msg(
-                InvalidStructure, "Number of col indices and values must be the same."
+                InvalidStructure,
+                "Number of col indices and values must be the same.",
             ));
         }
 
@@ -90,9 +91,15 @@ impl<T> CooMatrix<T>
         let col_indices_in_bounds = col_indices.iter().all(|j| *j < ncols);
 
         if !row_indices_in_bounds {
-            Err(SparseFormatError::from_kind_and_msg(IndexOutOfBounds, "Row index out of bounds."))
+            Err(SparseFormatError::from_kind_and_msg(
+                IndexOutOfBounds,
+                "Row index out of bounds.",
+            ))
         } else if !col_indices_in_bounds {
-            Err(SparseFormatError::from_kind_and_msg(IndexOutOfBounds, "Col index out of bounds."))
+            Err(SparseFormatError::from_kind_and_msg(
+                IndexOutOfBounds,
+                "Col index out of bounds.",
+            ))
         } else {
             Ok(Self {
                 nrows,

nalgebra-sparse/src/cs.rs

@@ -5,8 +5,8 @@ use num_traits::One;
 
 use nalgebra::Scalar;
 
-use crate::{SparseEntry, SparseEntryMut};
 use crate::pattern::SparsityPattern;
+use crate::{SparseEntry, SparseEntryMut};
 
 /// An abstract compressed matrix.
 ///
@@ -18,7 +18,7 @@ use crate::pattern::SparsityPattern;
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub struct CsMatrix<T> {
     sparsity_pattern: SparsityPattern,
-    values: Vec<T>
+    values: Vec<T>,
 }
 
 impl<T> CsMatrix<T> {
@@ -50,14 +50,22 @@ impl<T> CsMatrix<T> {
     #[inline]
     pub fn cs_data(&self) -> (&[usize], &[usize], &[T]) {
         let pattern = self.pattern();
-        (pattern.major_offsets(), pattern.minor_indices(), &self.values)
+        (
+            pattern.major_offsets(),
+            pattern.minor_indices(),
+            &self.values,
+        )
     }
 
     /// Returns the raw data represented as a tuple `(major_offsets, minor_indices, values)`.
     #[inline]
     pub fn cs_data_mut(&mut self) -> (&[usize], &[usize], &mut [T]) {
         let pattern = &mut self.sparsity_pattern;
-        (pattern.major_offsets(), pattern.minor_indices(), &mut self.values)
+        (
+            pattern.major_offsets(),
+            pattern.minor_indices(),
+            &mut self.values,
+        )
     }
 
     #[inline]
@@ -66,9 +74,12 @@ impl<T> CsMatrix<T> {
     }
 
     #[inline]
-    pub fn from_pattern_and_values(pattern: SparsityPattern, values: Vec<T>)
+    pub fn from_pattern_and_values(pattern: SparsityPattern, values: Vec<T>) -> Self {
-                                   -> Self {
+        assert_eq!(
-        assert_eq!(pattern.nnz(), values.len(), "Internal error: consumers should verify shape compatibility.");
+            pattern.nnz(),
+            values.len(),
+            "Internal error: consumers should verify shape compatibility."
+        );
         Self {
             sparsity_pattern: pattern,
             values,
@@ -80,7 +91,7 @@ impl<T> CsMatrix<T> {
     pub fn get_index_range(&self, row_index: usize) -> Option<Range<usize>> {
         let row_begin = *self.sparsity_pattern.major_offsets().get(row_index)?;
         let row_end = *self.sparsity_pattern.major_offsets().get(row_index + 1)?;
-        Some(row_begin .. row_end)
+        Some(row_begin..row_end)
     }
 
     pub fn take_pattern_and_values(self) -> (SparsityPattern, Vec<T>) {
@@ -105,13 +116,21 @@ impl<T> CsMatrix<T> {
         let (_, minor_indices, values) = self.cs_data();
         let minor_indices = &minor_indices[row_range.clone()];
         let values = &values[row_range];
-        get_entry_from_slices(self.pattern().minor_dim(), minor_indices, values, minor_index)
+        get_entry_from_slices(
+            self.pattern().minor_dim(),
+            minor_indices,
+            values,
+            minor_index,
+        )
     }
 
     /// Returns a mutable entry for the given major/minor indices, or `None` if the indices are out
     /// of bounds.
-    pub fn get_entry_mut(&mut self, major_index: usize, minor_index: usize)
+    pub fn get_entry_mut(
-                         -> Option<SparseEntryMut<T>> {
+        &mut self,
+        major_index: usize,
+        minor_index: usize,
+    ) -> Option<SparseEntryMut<T>> {
         let row_range = self.get_index_range(major_index)?;
         let minor_dim = self.pattern().minor_dim();
         let (_, minor_indices, values) = self.cs_data_mut();
@@ -126,7 +145,7 @@ impl<T> CsMatrix<T> {
         Some(CsLane {
             minor_indices: &minor_indices[range.clone()],
             values: &values[range],
-            minor_dim: self.pattern().minor_dim()
+            minor_dim: self.pattern().minor_dim(),
         })
     }
 
@@ -138,7 +157,7 @@ impl<T> CsMatrix<T> {
         Some(CsLaneMut {
             minor_dim,
             minor_indices: &minor_indices[range.clone()],
-            values: &mut values[range]
+            values: &mut values[range],
         })
     }
 
@@ -156,7 +175,7 @@ impl<T> CsMatrix<T> {
     pub fn filter<P>(&self, predicate: P) -> Self
     where
         T: Clone,
-        P: Fn(usize, usize, &T) -> bool
+        P: Fn(usize, usize, &T) -> bool,
     {
         let (major_dim, minor_dim) = (self.pattern().major_dim(), self.pattern().minor_dim());
         let mut new_offsets = Vec::with_capacity(self.pattern().major_dim() + 1);
@@ -180,7 +199,8 @@ impl<T> CsMatrix<T> {
             major_dim,
             minor_dim,
             new_offsets,
-            new_indices)
+            new_indices,
+        )
         .expect("Internal error: Sparsity pattern must always be valid.");
 
         Self::from_pattern_and_values(new_pattern, new_values)
@@ -189,7 +209,7 @@ impl<T> CsMatrix<T> {
     /// Returns the diagonal of the matrix as a sparse matrix.
     pub fn diagonal_as_matrix(&self) -> Self
     where
-            T: Clone
+        T: Clone,
     {
         // TODO: This might be faster with a binary search for each diagonal entry
         self.filter(|i, j, _| i == j)
@@ -199,13 +219,13 @@ impl<T> CsMatrix<T> {
 impl<T: Scalar + One> CsMatrix<T> {
     #[inline]
     pub fn identity(n: usize) -> Self {
-        let offsets: Vec<_> = (0 ..= n).collect();
+        let offsets: Vec<_> = (0..=n).collect();
-        let indices: Vec<_> = (0 .. n).collect();
+        let indices: Vec<_> = (0..n).collect();
         let values = vec![T::one(); n];
 
         // TODO: We should skip checks here
-        let pattern = SparsityPattern::try_from_offsets_and_indices(n, n, offsets, indices)
+        let pattern =
-            .unwrap();
+            SparsityPattern::try_from_offsets_and_indices(n, n, offsets, indices).unwrap();
         Self::from_pattern_and_values(pattern, values)
     }
 }
@@ -214,7 +234,8 @@ fn get_entry_from_slices<'a, T>(
     minor_dim: usize,
     minor_indices: &'a [usize],
     values: &'a [T],
-    global_minor_index: usize) -> Option<SparseEntry<'a, T>> {
+    global_minor_index: usize,
+) -> Option<SparseEntry<'a, T>> {
     let local_index = minor_indices.binary_search(&global_minor_index);
     if let Ok(local_index) = local_index {
         Some(SparseEntry::NonZero(&values[local_index]))
@@ -229,7 +250,8 @@ fn get_mut_entry_from_slices<'a, T>(
     minor_dim: usize,
     minor_indices: &'a [usize],
     values: &'a mut [T],
-    global_minor_indices: usize) -> Option<SparseEntryMut<'a, T>> {
+    global_minor_indices: usize,
+) -> Option<SparseEntryMut<'a, T>> {
     let local_index = minor_indices.binary_search(&global_minor_indices);
     if let Ok(local_index) = local_index {
         Some(SparseEntryMut::NonZero(&mut values[local_index]))
@@ -244,14 +266,14 @@ fn get_mut_entry_from_slices<'a, T>(
 pub struct CsLane<'a, T> {
     minor_dim: usize,
     minor_indices: &'a [usize],
-    values: &'a [T]
+    values: &'a [T],
 }
 
 #[derive(Debug, PartialEq, Eq)]
 pub struct CsLaneMut<'a, T> {
     minor_dim: usize,
     minor_indices: &'a [usize],
-    values: &'a mut [T]
+    values: &'a mut [T],
 }
 
 pub struct CsLaneIter<'a, T> {
@@ -266,14 +288,14 @@ impl<'a, T> CsLaneIter<'a, T> {
         Self {
             current_lane_idx: 0,
             pattern,
-            remaining_values: values
+            remaining_values: values,
         }
     }
 }
 
 impl<'a, T> Iterator for CsLaneIter<'a, T>
-    where
+where
-        T: 'a
+    T: 'a,
 {
     type Item = CsLane<'a, T>;
 
@@ -284,13 +306,13 @@ impl<'a, T> Iterator for CsLaneIter<'a, T>
         if let Some(minor_indices) = lane {
             let count = minor_indices.len();
             let values_in_lane = &self.remaining_values[..count];
-            self.remaining_values = &self.remaining_values[count ..];
+            self.remaining_values = &self.remaining_values[count..];
             self.current_lane_idx += 1;
 
             Some(CsLane {
                 minor_dim,
                 minor_indices,
-                values: values_in_lane
+                values: values_in_lane,
             })
         } else {
             None
@@ -310,14 +332,14 @@ impl<'a, T> CsLaneIterMut<'a, T> {
         Self {
             current_lane_idx: 0,
             pattern,
-            remaining_values: values
+            remaining_values: values,
         }
     }
 }
 
 impl<'a, T> Iterator for CsLaneIterMut<'a, T>
-    where
+where
-        T: 'a
+    T: 'a,
 {
     type Item = CsLaneMut<'a, T>;
 
@@ -336,7 +358,7 @@ impl<'a, T> Iterator for CsLaneIterMut<'a, T>
             Some(CsLaneMut {
                 minor_dim,
                 minor_indices,
-                values: values_in_lane
+                values: values_in_lane,
             })
         } else {
             None
@@ -375,10 +397,11 @@ macro_rules! impl_cs_lane_common_methods {
                     self.minor_dim,
                     self.minor_indices,
                     self.values,
-                    global_col_index)
+                    global_col_index,
-            }
+                )
             }
         }
+    };
 }
 
 impl_cs_lane_common_methods!(CsLane<'a, T>);
@@ -394,10 +417,12 @@ impl<'a, T> CsLaneMut<'a, T> {
     }
 
     pub fn get_entry_mut(&mut self, global_minor_index: usize) -> Option<SparseEntryMut<T>> {
-        get_mut_entry_from_slices(self.minor_dim,
+        get_mut_entry_from_slices(
+            self.minor_dim,
             self.minor_indices,
             self.values,
-                                  global_minor_index)
+            global_minor_index,
+        )
     }
 }
 
@@ -405,7 +430,7 @@ impl<'a, T> CsLaneMut<'a, T> {
 /// TODO: This doesn't belong here.
 struct UninitVec<T> {
     vec: Vec<T>,
-    len: usize
+    len: usize,
 }
 
 impl<T> UninitVec<T> {
@@ -414,7 +439,7 @@ impl<T> UninitVec<T> {
             vec: Vec::with_capacity(len),
             // We need to store len separately, because for zero-sized types,
             // Vec::with_capacity(len) does not give vec.capacity() == len
-            len
+            len,
         }
     }
 
@@ -444,10 +469,10 @@ pub fn transpose_cs<T>(
     minor_dim: usize,
     source_major_offsets: &[usize],
     source_minor_indices: &[usize],
-                   values: &[T])
+    values: &[T],
-                   -> (Vec<usize>, Vec<usize>, Vec<T>)
+) -> (Vec<usize>, Vec<usize>, Vec<T>)
 where
-    T: Scalar
+    T: Scalar,
 {
     assert_eq!(source_major_offsets.len(), major_dim + 1);
     assert_eq!(source_minor_indices.len(), values.len());
@@ -470,18 +495,20 @@ where
     // Keep track of how many entries we have placed in each target major lane
     let mut current_target_major_counts = vec![0; minor_dim];
 
-    for source_major_idx in 0 .. major_dim {
+    for source_major_idx in 0..major_dim {
         let source_lane_begin = source_major_offsets[source_major_idx];
         let source_lane_end = source_major_offsets[source_major_idx + 1];
-        let source_lane_indices = &source_minor_indices[source_lane_begin .. source_lane_end];
+        let source_lane_indices = &source_minor_indices[source_lane_begin..source_lane_end];
-        let source_lane_values = &values[source_lane_begin .. source_lane_end];
+        let source_lane_values = &values[source_lane_begin..source_lane_end];
 
         for (&source_minor_idx, val) in source_lane_indices.iter().zip(source_lane_values) {
             // Compute the offset in the target data for this particular source entry
             let target_lane_count = &mut current_target_major_counts[source_minor_idx];
             let entry_offset = target_offsets[source_minor_idx] + *target_lane_count;
             target_indices[entry_offset] = source_major_idx;
-            unsafe { target_values.set(entry_offset, val.inlined_clone()); }
+            unsafe {
+                target_values.set(entry_offset, val.inlined_clone());
+            }
             *target_lane_count += 1;
         }
     }

nalgebra-sparse/src/csc.rs

@@ -3,14 +3,14 @@
 //! This is the module-level documentation. See [`CscMatrix`] for the main documentation of the
 //! CSC implementation.
 
-use crate::{SparseFormatError, SparseFormatErrorKind, SparseEntry, SparseEntryMut};
+use crate::cs::{CsLane, CsLaneIter, CsLaneIterMut, CsLaneMut, CsMatrix};
-use crate::pattern::{SparsityPattern, SparsityPatternFormatError, SparsityPatternIter};
 use crate::csr::CsrMatrix;
-use crate::cs::{CsMatrix, CsLane, CsLaneMut, CsLaneIter, CsLaneIterMut};
+use crate::pattern::{SparsityPattern, SparsityPatternFormatError, SparsityPatternIter};
+use crate::{SparseEntry, SparseEntryMut, SparseFormatError, SparseFormatErrorKind};
 
-use std::slice::{IterMut, Iter};
-use num_traits::{One};
 use nalgebra::Scalar;
+use num_traits::One;
+use std::slice::{Iter, IterMut};
 
 /// A CSC representation of a sparse matrix.
 ///
@@ -130,7 +130,7 @@ impl<T> CscMatrix<T> {
     /// Create a zero CSC matrix with no explicitly stored entries.
     pub fn zeros(nrows: usize, ncols: usize) -> Self {
         Self {
-            cs: CsMatrix::new(ncols, nrows)
+            cs: CsMatrix::new(ncols, nrows),
         }
     }
 
@@ -196,7 +196,11 @@ impl<T> CscMatrix<T> {
         values: Vec<T>,
     ) -> Result<Self, SparseFormatError> {
         let pattern = SparsityPattern::try_from_offsets_and_indices(
-            num_cols, num_rows, col_offsets, row_indices)
+            num_cols,
+            num_rows,
+            col_offsets,
+            row_indices,
+        )
         .map_err(pattern_format_error_to_csc_error)?;
         Self::try_from_pattern_and_values(pattern, values)
     }
@@ -205,16 +209,19 @@ impl<T> CscMatrix<T> {
     ///
     /// Returns an error if the number of values does not match the number of minor indices
     /// in the pattern.
-    pub fn try_from_pattern_and_values(pattern: SparsityPattern, values: Vec<T>)
+    pub fn try_from_pattern_and_values(
-        -> Result<Self, SparseFormatError> {
+        pattern: SparsityPattern,
+        values: Vec<T>,
+    ) -> Result<Self, SparseFormatError> {
         if pattern.nnz() == values.len() {
             Ok(Self {
-                cs: CsMatrix::from_pattern_and_values(pattern, values)
+                cs: CsMatrix::from_pattern_and_values(pattern, values),
             })
         } else {
             Err(SparseFormatError::from_kind_and_msg(
                 SparseFormatErrorKind::InvalidStructure,
-                "Number of values and row indices must be the same"))
+                "Number of values and row indices must be the same",
+            ))
         }
     }
 
@@ -239,7 +246,7 @@ impl<T> CscMatrix<T> {
     pub fn triplet_iter(&self) -> CscTripletIter<T> {
         CscTripletIter {
             pattern_iter: self.pattern().entries(),
-            values_iter: self.values().iter()
+            values_iter: self.values().iter(),
         }
     }
 
@@ -270,7 +277,7 @@ impl<T> CscMatrix<T> {
         let (pattern, values) = self.cs.pattern_and_values_mut();
         CscTripletIterMut {
             pattern_iter: pattern.entries(),
-            values_mut_iter: values.iter_mut()
+            values_mut_iter: values.iter_mut(),
         }
     }
 
@@ -281,8 +288,7 @@ impl<T> CscMatrix<T> {
     /// Panics if column index is out of bounds.
     #[inline]
     pub fn col(&self, index: usize) -> CscCol<T> {
-        self.get_col(index)
+        self.get_col(index).expect("Row index must be in bounds")
-            .expect("Row index must be in bounds")
     }
 
     /// Mutable column access for the given column index.
@@ -299,23 +305,19 @@ impl<T> CscMatrix<T> {
     /// Return the column at the given column index, or `None` if out of bounds.
     #[inline]
     pub fn get_col(&self, index: usize) -> Option<CscCol<T>> {
-        self.cs
+        self.cs.get_lane(index).map(|lane| CscCol { lane })
-            .get_lane(index)
-            .map(|lane| CscCol { lane })
     }
 
     /// Mutable column access for the given column index, or `None` if out of bounds.
     #[inline]
     pub fn get_col_mut(&mut self, index: usize) -> Option<CscColMut<T>> {
-        self.cs
+        self.cs.get_lane_mut(index).map(|lane| CscColMut { lane })
-            .get_lane_mut(index)
-            .map(|lane| CscColMut { lane })
     }
 
     /// An iterator over columns in the matrix.
     pub fn col_iter(&self) -> CscColIter<T> {
         CscColIter {
-            lane_iter: CsLaneIter::new(self.pattern(), self.values())
+            lane_iter: CsLaneIter::new(self.pattern(), self.values()),
         }
     }
 
@@ -323,7 +325,7 @@ impl<T> CscMatrix<T> {
     pub fn col_iter_mut(&mut self) -> CscColIterMut<T> {
         let (pattern, values) = self.cs.pattern_and_values_mut();
         CscColIterMut {
-            lane_iter: CsLaneIterMut::new(pattern, values)
+            lane_iter: CsLaneIterMut::new(pattern, values),
         }
     }
 
@@ -397,8 +399,11 @@ impl<T> CscMatrix<T> {
     ///
     /// Each call to this function incurs the cost of a binary search among the explicitly
     /// stored row entries for the given column.
-    pub fn get_entry_mut(&mut self, row_index: usize, col_index: usize)
+    pub fn get_entry_mut(
-                         -> Option<SparseEntryMut<T>> {
+        &mut self,
+        row_index: usize,
+        col_index: usize,
+    ) -> Option<SparseEntryMut<T>> {
         self.cs.get_entry_mut(col_index, row_index)
     }
 
@@ -444,11 +449,15 @@ impl<T> CscMatrix<T> {
     pub fn filter<P>(&self, predicate: P) -> Self
     where
         T: Clone,
-        P: Fn(usize, usize, &T) -> bool
+        P: Fn(usize, usize, &T) -> bool,
     {
         // Note: Predicate uses (row, col, value), so we have to switch around since
         // cs uses (major, minor, value)
-        Self { cs: self.cs.filter(|col_idx, row_idx, v| predicate(row_idx, col_idx, v)) }
+        Self {
+            cs: self
+                .cs
+                .filter(|col_idx, row_idx, v| predicate(row_idx, col_idx, v)),
+        }
     }
 
     /// Returns a new matrix representing the upper triangular part of this matrix.
@@ -456,7 +465,7 @@ impl<T> CscMatrix<T> {
     /// The result includes the diagonal of the matrix.
     pub fn upper_triangle(&self) -> Self
     where
-        T: Clone
+        T: Clone,
     {
         self.filter(|i, j, _| i <= j)
     }
@@ -466,7 +475,7 @@ impl<T> CscMatrix<T> {
     /// The result includes the diagonal of the matrix.
     pub fn lower_triangle(&self) -> Self
     where
-        T: Clone
+        T: Clone,
     {
         self.filter(|i, j, _| i >= j)
     }
@@ -474,15 +483,17 @@ impl<T> CscMatrix<T> {
     /// Returns the diagonal of the matrix as a sparse matrix.
     pub fn diagonal_as_csc(&self) -> Self
     where
-        T: Clone
+        T: Clone,
     {
-        Self { cs: self.cs.diagonal_as_matrix() }
+        Self {
+            cs: self.cs.diagonal_as_matrix(),
+        }
     }
 }
 
 impl<T> CscMatrix<T>
-    where
+where
-        T: Scalar
+    T: Scalar,
 {
     /// Compute the transpose of the matrix.
     pub fn transpose(&self) -> CscMatrix<T> {
@@ -495,7 +506,7 @@ impl<T: Scalar + One> CscMatrix<T> {
     #[inline]
     pub fn identity(n: usize) -> Self {
         Self {
-            cs: CsMatrix::identity(n)
+            cs: CsMatrix::identity(n),
         }
     }
 }
@@ -505,30 +516,34 @@ impl<T: Scalar + One> CscMatrix<T> {
 /// This ensures that the terminology is consistent: we are talking about rows and columns,
 /// not lanes, major and minor dimensions.
 fn pattern_format_error_to_csc_error(err: SparsityPatternFormatError) -> SparseFormatError {
-    use SparsityPatternFormatError::*;
-    use SparsityPatternFormatError::DuplicateEntry as PatternDuplicateEntry;
     use SparseFormatError as E;
     use SparseFormatErrorKind as K;
+    use SparsityPatternFormatError::DuplicateEntry as PatternDuplicateEntry;
+    use SparsityPatternFormatError::*;
 
     match err {
         InvalidOffsetArrayLength => E::from_kind_and_msg(
             K::InvalidStructure,
-            "Length of col offset array is not equal to ncols + 1."),
+            "Length of col offset array is not equal to ncols + 1.",
+        ),
         InvalidOffsetFirstLast => E::from_kind_and_msg(
             K::InvalidStructure,
-            "First or last col offset is inconsistent with format specification."),
+            "First or last col offset is inconsistent with format specification.",
+        ),
         NonmonotonicOffsets => E::from_kind_and_msg(
             K::InvalidStructure,
-            "Col offsets are not monotonically increasing."),
+            "Col offsets are not monotonically increasing.",
+        ),
         NonmonotonicMinorIndices => E::from_kind_and_msg(
             K::InvalidStructure,
-            "Row indices are not monotonically increasing (sorted) within each column."),
+            "Row indices are not monotonically increasing (sorted) within each column.",
-        MinorIndexOutOfBounds => E::from_kind_and_msg(
+        ),
-            K::IndexOutOfBounds,
+        MinorIndexOutOfBounds => {
-            "Row indices are out of bounds."),
+            E::from_kind_and_msg(K::IndexOutOfBounds, "Row indices are out of bounds.")
-        PatternDuplicateEntry => E::from_kind_and_msg(
+        }
-            K::DuplicateEntry,
+        PatternDuplicateEntry => {
-            "Matrix data contains duplicate entries."),
+            E::from_kind_and_msg(K::DuplicateEntry, "Matrix data contains duplicate entries.")
+        }
     }
 }
 
@@ -536,7 +551,7 @@ fn pattern_format_error_to_csc_error(err: SparsityPatternFormatError) -> SparseF
 #[derive(Debug)]
 pub struct CscTripletIter<'a, T> {
     pattern_iter: SparsityPatternIter<'a>,
-    values_iter: Iter<'a, T>
+    values_iter: Iter<'a, T>,
 }
 
 impl<'a, T: Clone> CscTripletIter<'a, T> {
@@ -545,7 +560,7 @@ impl<'a, T: Clone> CscTripletIter<'a, T> {
     /// The triplet iterator returns references to the values. This method adapts the iterator
     /// so that the values are cloned.
     #[inline]
-    pub fn cloned_values(self) -> impl 'a + Iterator<Item=(usize, usize, T)> {
+    pub fn cloned_values(self) -> impl 'a + Iterator<Item = (usize, usize, T)> {
         self.map(|(i, j, v)| (i, j, v.clone()))
     }
 }
@@ -559,7 +574,7 @@ impl<'a, T> Iterator for CscTripletIter<'a, T> {
 
         match (next_entry, next_value) {
             (Some((i, j)), Some(v)) => Some((j, i, v)),
-            _ => None
+            _ => None,
         }
     }
 }
@@ -568,7 +583,7 @@ impl<'a, T> Iterator for CscTripletIter<'a, T> {
 #[derive(Debug)]
 pub struct CscTripletIterMut<'a, T> {
     pattern_iter: SparsityPatternIter<'a>,
-    values_mut_iter: IterMut<'a, T>
+    values_mut_iter: IterMut<'a, T>,
 }
 
 impl<'a, T> Iterator for CscTripletIterMut<'a, T> {
@@ -581,7 +596,7 @@ impl<'a, T> Iterator for CscTripletIterMut<'a, T> {
 
         match (next_entry, next_value) {
             (Some((i, j)), Some(v)) => Some((j, i, v)),
-            _ => None
+            _ => None,
         }
     }
 }
@@ -589,7 +604,7 @@ impl<'a, T> Iterator for CscTripletIterMut<'a, T> {
 /// An immutable representation of a column in a CSC matrix.
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub struct CscCol<'a, T> {
-    lane: CsLane<'a, T>
+    lane: CsLane<'a, T>,
 }
 
 /// A mutable representation of a column in a CSC matrix.
@@ -598,7 +613,7 @@ pub struct CscCol<'a, T> {
 /// to the column cannot be modified.
 #[derive(Debug, PartialEq, Eq)]
 pub struct CscColMut<'a, T> {
-    lane: CsLaneMut<'a, T>
+    lane: CsLaneMut<'a, T>,
 }
 
 /// Implement the methods common to both CscCol and CscColMut
@@ -637,7 +652,7 @@ macro_rules! impl_csc_col_common_methods {
                 self.lane.get_entry(global_row_index)
             }
         }
-    }
+    };
 }
 
 impl_csc_col_common_methods!(CscCol<'a, T>);
@@ -666,33 +681,29 @@ impl<'a, T> CscColMut<'a, T> {
 
 /// Column iterator for [CscMatrix](struct.CscMatrix.html).
 pub struct CscColIter<'a, T> {
-    lane_iter: CsLaneIter<'a, T>
+    lane_iter: CsLaneIter<'a, T>,
 }
 
 impl<'a, T> Iterator for CscColIter<'a, T> {
     type Item = CscCol<'a, T>;
 
     fn next(&mut self) -> Option<Self::Item> {
-        self.lane_iter
+        self.lane_iter.next().map(|lane| CscCol { lane })
-            .next()
-            .map(|lane| CscCol { lane })
     }
 }
 
 /// Mutable column iterator for [CscMatrix](struct.CscMatrix.html).
 pub struct CscColIterMut<'a, T> {
-    lane_iter: CsLaneIterMut<'a, T>
+    lane_iter: CsLaneIterMut<'a, T>,
 }
 
 impl<'a, T> Iterator for CscColIterMut<'a, T>
 where
-    T: 'a
+    T: 'a,
 {
     type Item = CscColMut<'a, T>;
 
     fn next(&mut self) -> Option<Self::Item> {
-        self.lane_iter
+        self.lane_iter.next().map(|lane| CscColMut { lane })
-            .next()
-            .map(|lane| CscColMut { lane })
     }
 }

nalgebra-sparse/src/csr.rs

@@ -2,15 +2,15 @@
 //!
 //! This is the module-level documentation. See [`CsrMatrix`] for the main documentation of the
 //! CSC implementation.
-use crate::{SparseFormatError, SparseFormatErrorKind, SparseEntry, SparseEntryMut};
+use crate::cs::{CsLane, CsLaneIter, CsLaneIterMut, CsLaneMut, CsMatrix};
-use crate::pattern::{SparsityPattern, SparsityPatternFormatError, SparsityPatternIter};
 use crate::csc::CscMatrix;
-use crate::cs::{CsMatrix, CsLaneIterMut, CsLaneIter, CsLane, CsLaneMut};
+use crate::pattern::{SparsityPattern, SparsityPatternFormatError, SparsityPatternIter};
+use crate::{SparseEntry, SparseEntryMut, SparseFormatError, SparseFormatErrorKind};
 
 use nalgebra::Scalar;
-use num_traits::{One};
+use num_traits::One;
 
-use std::slice::{IterMut, Iter};
+use std::slice::{Iter, IterMut};
 
 /// A CSR representation of a sparse matrix.
 ///
@@ -130,7 +130,7 @@ impl<T> CsrMatrix<T> {
     /// Create a zero CSR matrix with no explicitly stored entries.
     pub fn zeros(nrows: usize, ncols: usize) -> Self {
         Self {
-            cs: CsMatrix::new(nrows, ncols)
+            cs: CsMatrix::new(nrows, ncols),
         }
     }
 
@@ -198,7 +198,11 @@ impl<T> CsrMatrix<T> {
         values: Vec<T>,
     ) -> Result<Self, SparseFormatError> {
         let pattern = SparsityPattern::try_from_offsets_and_indices(
-            num_rows, num_cols, row_offsets, col_indices)
+            num_rows,
+            num_cols,
+            row_offsets,
+            col_indices,
+        )
         .map_err(pattern_format_error_to_csr_error)?;
         Self::try_from_pattern_and_values(pattern, values)
     }
@@ -207,16 +211,19 @@ impl<T> CsrMatrix<T> {
     ///
     /// Returns an error if the number of values does not match the number of minor indices
     /// in the pattern.
-    pub fn try_from_pattern_and_values(pattern: SparsityPattern, values: Vec<T>)
+    pub fn try_from_pattern_and_values(
-        -> Result<Self, SparseFormatError> {
+        pattern: SparsityPattern,
+        values: Vec<T>,
+    ) -> Result<Self, SparseFormatError> {
         if pattern.nnz() == values.len() {
             Ok(Self {
-                cs: CsMatrix::from_pattern_and_values(pattern, values)
+                cs: CsMatrix::from_pattern_and_values(pattern, values),
             })
         } else {
             Err(SparseFormatError::from_kind_and_msg(
                 SparseFormatErrorKind::InvalidStructure,
-                "Number of values and column indices must be the same"))
+                "Number of values and column indices must be the same",
+            ))
         }
     }
 
@@ -241,7 +248,7 @@ impl<T> CsrMatrix<T> {
     pub fn triplet_iter(&self) -> CsrTripletIter<T> {
         CsrTripletIter {
             pattern_iter: self.pattern().entries(),
-            values_iter: self.values().iter()
+            values_iter: self.values().iter(),
         }
     }
 
@@ -272,7 +279,7 @@ impl<T> CsrMatrix<T> {
         let (pattern, values) = self.cs.pattern_and_values_mut();
         CsrTripletIterMut {
             pattern_iter: pattern.entries(),
-            values_mut_iter: values.iter_mut()
+            values_mut_iter: values.iter_mut(),
         }
     }
 
@@ -283,8 +290,7 @@ impl<T> CsrMatrix<T> {
     /// Panics if row index is out of bounds.
     #[inline]
     pub fn row(&self, index: usize) -> CsrRow<T> {
-        self.get_row(index)
+        self.get_row(index).expect("Row index must be in bounds")
-            .expect("Row index must be in bounds")
     }
 
     /// Mutable row access for the given row index.
@@ -301,23 +307,19 @@ impl<T> CsrMatrix<T> {
     /// Return the row at the given row index, or `None` if out of bounds.
     #[inline]
     pub fn get_row(&self, index: usize) -> Option<CsrRow<T>> {
-        self.cs
+        self.cs.get_lane(index).map(|lane| CsrRow { lane })
-            .get_lane(index)
-            .map(|lane| CsrRow { lane })
     }
 
     /// Mutable row access for the given row index, or `None` if out of bounds.
     #[inline]
     pub fn get_row_mut(&mut self, index: usize) -> Option<CsrRowMut<T>> {
-        self.cs
+        self.cs.get_lane_mut(index).map(|lane| CsrRowMut { lane })
-            .get_lane_mut(index)
-            .map(|lane| CsrRowMut { lane })
     }
 
     /// An iterator over rows in the matrix.
     pub fn row_iter(&self) -> CsrRowIter<T> {
         CsrRowIter {
-            lane_iter: CsLaneIter::new(self.pattern(), self.values())
+            lane_iter: CsLaneIter::new(self.pattern(), self.values()),
         }
     }
 
@@ -399,8 +401,11 @@ impl<T> CsrMatrix<T> {
     ///
     /// Each call to this function incurs the cost of a binary search among the explicitly
     /// stored column entries for the given row.
-    pub fn get_entry_mut(&mut self, row_index: usize, col_index: usize)
+    pub fn get_entry_mut(
-                         -> Option<SparseEntryMut<T>> {
+        &mut self,
+        row_index: usize,
+        col_index: usize,
+    ) -> Option<SparseEntryMut<T>> {
         self.cs.get_entry_mut(row_index, col_index)
     }
 
@@ -446,9 +451,13 @@ impl<T> CsrMatrix<T> {
     pub fn filter<P>(&self, predicate: P) -> Self
     where
         T: Clone,
-            P: Fn(usize, usize, &T) -> bool
+        P: Fn(usize, usize, &T) -> bool,
     {
-        Self { cs: self.cs.filter(|row_idx, col_idx, v| predicate(row_idx, col_idx, v)) }
+        Self {
+            cs: self
+                .cs
+                .filter(|row_idx, col_idx, v| predicate(row_idx, col_idx, v)),
+        }
     }
 
     /// Returns a new matrix representing the upper triangular part of this matrix.
@@ -456,7 +465,7 @@ impl<T> CsrMatrix<T> {
     /// The result includes the diagonal of the matrix.
     pub fn upper_triangle(&self) -> Self
     where
-            T: Clone
+        T: Clone,
     {
         self.filter(|i, j, _| i <= j)
     }
@@ -466,7 +475,7 @@ impl<T> CsrMatrix<T> {
     /// The result includes the diagonal of the matrix.
     pub fn lower_triangle(&self) -> Self
     where
-            T: Clone
+        T: Clone,
     {
         self.filter(|i, j, _| i >= j)
     }
@@ -474,15 +483,17 @@ impl<T> CsrMatrix<T> {
     /// Returns the diagonal of the matrix as a sparse matrix.
     pub fn diagonal_as_csr(&self) -> Self
     where
-            T: Clone
+        T: Clone,
     {
-        Self { cs: self.cs.diagonal_as_matrix() }
+        Self {
+            cs: self.cs.diagonal_as_matrix(),
+        }
     }
 }
 
 impl<T> CsrMatrix<T>
 where
-    T: Scalar
+    T: Scalar,
 {
     /// Compute the transpose of the matrix.
     pub fn transpose(&self) -> CsrMatrix<T> {
@@ -495,7 +506,7 @@ impl<T: Scalar + One> CsrMatrix<T> {
     #[inline]
     pub fn identity(n: usize) -> Self {
         Self {
-            cs: CsMatrix::identity(n)
+            cs: CsMatrix::identity(n),
         }
     }
 }
@@ -505,30 +516,34 @@ impl<T: Scalar + One> CsrMatrix<T> {
 /// This ensures that the terminology is consistent: we are talking about rows and columns,
 /// not lanes, major and minor dimensions.
 fn pattern_format_error_to_csr_error(err: SparsityPatternFormatError) -> SparseFormatError {
-    use SparsityPatternFormatError::*;
-    use SparsityPatternFormatError::DuplicateEntry as PatternDuplicateEntry;
     use SparseFormatError as E;
     use SparseFormatErrorKind as K;
+    use SparsityPatternFormatError::DuplicateEntry as PatternDuplicateEntry;
+    use SparsityPatternFormatError::*;
 
     match err {
         InvalidOffsetArrayLength => E::from_kind_and_msg(
             K::InvalidStructure,
-            "Length of row offset array is not equal to nrows + 1."),
+            "Length of row offset array is not equal to nrows + 1.",
+        ),
         InvalidOffsetFirstLast => E::from_kind_and_msg(
             K::InvalidStructure,
-            "First or last row offset is inconsistent with format specification."),
+            "First or last row offset is inconsistent with format specification.",
+        ),
         NonmonotonicOffsets => E::from_kind_and_msg(
             K::InvalidStructure,
-            "Row offsets are not monotonically increasing."),
+            "Row offsets are not monotonically increasing.",
+        ),
         NonmonotonicMinorIndices => E::from_kind_and_msg(
             K::InvalidStructure,
-            "Column indices are not monotonically increasing (sorted) within each row."),
+            "Column indices are not monotonically increasing (sorted) within each row.",
-        MinorIndexOutOfBounds => E::from_kind_and_msg(
+        ),
-            K::IndexOutOfBounds,
+        MinorIndexOutOfBounds => {
-            "Column indices are out of bounds."),
+            E::from_kind_and_msg(K::IndexOutOfBounds, "Column indices are out of bounds.")
-        PatternDuplicateEntry => E::from_kind_and_msg(
+        }
-            K::DuplicateEntry,
+        PatternDuplicateEntry => {
-            "Matrix data contains duplicate entries."),
+            E::from_kind_and_msg(K::DuplicateEntry, "Matrix data contains duplicate entries.")
+        }
     }
 }
 
@@ -536,7 +551,7 @@ fn pattern_format_error_to_csr_error(err: SparsityPatternFormatError) -> SparseF
 #[derive(Debug)]
 pub struct CsrTripletIter<'a, T> {
     pattern_iter: SparsityPatternIter<'a>,
-    values_iter: Iter<'a, T>
+    values_iter: Iter<'a, T>,
 }
 
 impl<'a, T: Clone> CsrTripletIter<'a, T> {
@@ -545,7 +560,7 @@ impl<'a, T: Clone> CsrTripletIter<'a, T> {
     /// The triplet iterator returns references to the values. This method adapts the iterator
     /// so that the values are cloned.
     #[inline]
-    pub fn cloned_values(self) -> impl 'a + Iterator<Item=(usize, usize, T)> {
+    pub fn cloned_values(self) -> impl 'a + Iterator<Item = (usize, usize, T)> {
         self.map(|(i, j, v)| (i, j, v.clone()))
     }
 }
@@ -559,7 +574,7 @@ impl<'a, T> Iterator for CsrTripletIter<'a, T> {
 
         match (next_entry, next_value) {
             (Some((i, j)), Some(v)) => Some((i, j, v)),
-            _ => None
+            _ => None,
         }
     }
 }
@@ -568,7 +583,7 @@ impl<'a, T> Iterator for CsrTripletIter<'a, T> {
 #[derive(Debug)]
 pub struct CsrTripletIterMut<'a, T> {
     pattern_iter: SparsityPatternIter<'a>,
-    values_mut_iter: IterMut<'a, T>
+    values_mut_iter: IterMut<'a, T>,
 }
 
 impl<'a, T> Iterator for CsrTripletIterMut<'a, T> {
@@ -581,7 +596,7 @@ impl<'a, T> Iterator for CsrTripletIterMut<'a, T> {
 
         match (next_entry, next_value) {
             (Some((i, j)), Some(v)) => Some((i, j, v)),
-            _ => None
+            _ => None,
         }
     }
 }
@@ -589,7 +604,7 @@ impl<'a, T> Iterator for CsrTripletIterMut<'a, T> {
 /// An immutable representation of a row in a CSR matrix.
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub struct CsrRow<'a, T> {
-    lane: CsLane<'a, T>
+    lane: CsLane<'a, T>,
 }
 
 /// A mutable representation of a row in a CSR matrix.
@@ -598,7 +613,7 @@ pub struct CsrRow<'a, T> {
 /// to the row cannot be modified.
 #[derive(Debug, PartialEq, Eq)]
 pub struct CsrRowMut<'a, T> {
-    lane: CsLaneMut<'a, T>
+    lane: CsLaneMut<'a, T>,
 }
 
 /// Implement the methods common to both CsrRow and CsrRowMut
@@ -638,7 +653,7 @@ macro_rules! impl_csr_row_common_methods {
                 self.lane.get_entry(global_col_index)
             }
         }
-    }
+    };
 }
 
 impl_csr_row_common_methods!(CsrRow<'a, T>);
@@ -670,33 +685,29 @@ impl<'a, T> CsrRowMut<'a, T> {
 
 /// Row iterator for [CsrMatrix](struct.CsrMatrix.html).
 pub struct CsrRowIter<'a, T> {
-    lane_iter: CsLaneIter<'a, T>
+    lane_iter: CsLaneIter<'a, T>,
 }
 
 impl<'a, T> Iterator for CsrRowIter<'a, T> {
     type Item = CsrRow<'a, T>;
 
     fn next(&mut self) -> Option<Self::Item> {
-        self.lane_iter
+        self.lane_iter.next().map(|lane| CsrRow { lane })
-            .next()
-            .map(|lane| CsrRow { lane })
     }
 }
 
 /// Mutable row iterator for [CsrMatrix](struct.CsrMatrix.html).
 pub struct CsrRowIterMut<'a, T> {
-    lane_iter: CsLaneIterMut<'a, T>
+    lane_iter: CsLaneIterMut<'a, T>,
 }
 
 impl<'a, T> Iterator for CsrRowIterMut<'a, T>
 where
-    T: 'a
+    T: 'a,
 {
     type Item = CsrRowMut<'a, T>;
 
     fn next(&mut self) -> Option<Self::Item> {
-        self.lane_iter
+        self.lane_iter.next().map(|lane| CsrRowMut { lane })
-            .next()
-            .map(|lane| CsrRowMut { lane })
     }
 }

nalgebra-sparse/src/factorization/cholesky.rs

@@ -1,10 +1,10 @@
-use crate::pattern::SparsityPattern;
 use crate::csc::CscMatrix;
-use core::{mem, iter};
-use nalgebra::{Scalar, RealField, DMatrixSlice, DMatrixSliceMut, DMatrix};
-use std::fmt::{Display, Formatter};
 use crate::ops::serial::spsolve_csc_lower_triangular;
 use crate::ops::Op;
+use crate::pattern::SparsityPattern;
+use core::{iter, mem};
+use nalgebra::{DMatrix, DMatrixSlice, DMatrixSliceMut, RealField, Scalar};
+use std::fmt::{Display, Formatter};
 
 /// A symbolic sparse Cholesky factorization of a CSC matrix.
 ///
@@ -15,7 +15,7 @@ pub struct CscSymbolicCholesky {
     m_pattern: SparsityPattern,
     l_pattern: SparsityPattern,
     // u in this context is L^T, so that M = L L^T
-    u_pattern: SparsityPattern
+    u_pattern: SparsityPattern,
 }
 
 impl CscSymbolicCholesky {
@@ -28,8 +28,11 @@ impl CscSymbolicCholesky {
     ///
     /// Panics if the sparsity pattern is not square.
     pub fn factor(pattern: SparsityPattern) -> Self {
-        assert_eq!(pattern.major_dim(), pattern.minor_dim(),
+        assert_eq!(
-            "Major and minor dimensions must be the same (square matrix).");
+            pattern.major_dim(),
+            pattern.minor_dim(),
+            "Major and minor dimensions must be the same (square matrix)."
+        );
         let (l_pattern, u_pattern) = nonzero_pattern(&pattern);
         Self {
             m_pattern: pattern,
@@ -65,7 +68,7 @@ pub struct CscCholesky<T> {
     l_factor: CscMatrix<T>,
     u_pattern: SparsityPattern,
     work_x: Vec<T>,
-    work_c: Vec<usize>
+    work_c: Vec<usize>,
 }
 
 #[derive(Debug, PartialEq, Eq, Clone)]
@@ -100,16 +103,20 @@ impl<T: RealField> CscCholesky<T> {
     ///
     /// Panics if the number of values differ from the number of non-zeros of the sparsity pattern
     /// of the matrix that was symbolically factored.
-    pub fn factor_numerical(symbolic: CscSymbolicCholesky, values: &[T])
+    pub fn factor_numerical(
-        -> Result<Self, CholeskyError>
+        symbolic: CscSymbolicCholesky,
-    {
+        values: &[T],
-        assert_eq!(symbolic.l_pattern.nnz(), symbolic.u_pattern.nnz(),
+    ) -> Result<Self, CholeskyError> {
-                   "u is just the transpose of l, so should have the same nnz");
+        assert_eq!(
+            symbolic.l_pattern.nnz(),
+            symbolic.u_pattern.nnz(),
+            "u is just the transpose of l, so should have the same nnz"
+        );
 
         let l_nnz = symbolic.l_pattern.nnz();
         let l_values = vec![T::zero(); l_nnz];
-        let l_factor = CscMatrix::try_from_pattern_and_values(symbolic.l_pattern, l_values)
+        let l_factor =
-            .unwrap();
+            CscMatrix::try_from_pattern_and_values(symbolic.l_pattern, l_values).unwrap();
 
         let (nrows, ncols) = (l_factor.nrows(), l_factor.ncols());
 
@@ -229,11 +236,9 @@ impl<T: RealField> CscCholesky<T> {
 
                     {
                         let (offsets, _, values) = self.l_factor.csc_data_mut();
-                        *values
+                        *values.get_unchecked_mut(*offsets.get_unchecked(k)) = denom;
-                            .get_unchecked_mut(*offsets.get_unchecked(k)) = denom;
                     }
 
-
                     let mut col_k = self.l_factor.col_mut(k);
                     let (col_k_rows, col_k_values) = col_k.rows_and_values_mut();
                     let col_k_entries = col_k_rows.iter().zip(col_k_values);
@@ -269,19 +274,16 @@ impl<T: RealField> CscCholesky<T> {
     /// # Panics
     ///
     /// Panics if `b` is not square.
-    pub fn solve_mut<'a>(&'a self, b: impl Into<DMatrixSliceMut<'a, T>>)
+    pub fn solve_mut<'a>(&'a self, b: impl Into<DMatrixSliceMut<'a, T>>) {
-    {
         let expect_msg = "If the Cholesky factorization succeeded,\
             then the triangular solve should never fail";
         // Solve LY = B
         let mut y = b.into();
-        spsolve_csc_lower_triangular(Op::NoOp(self.l()), &mut y)
+        spsolve_csc_lower_triangular(Op::NoOp(self.l()), &mut y).expect(expect_msg);
-            .expect(expect_msg);
 
         // Solve L^T X = Y
         let mut x = y;
-        spsolve_csc_lower_triangular(Op::Transpose(self.l()), &mut x)
+        spsolve_csc_lower_triangular(Op::Transpose(self.l()), &mut x).expect(expect_msg);
-            .expect(expect_msg);
     }
 }
 
@@ -333,8 +335,8 @@ fn nonzero_pattern(m: &SparsityPattern) -> (SparsityPattern, SparsityPattern) {
         col_offsets.push(rows.len());
     }
 
-    let u_pattern =  SparsityPattern::try_from_offsets_and_indices(nrows, ncols, col_offsets, rows)
+    let u_pattern =
-        .unwrap();
+        SparsityPattern::try_from_offsets_and_indices(nrows, ncols, col_offsets, rows).unwrap();
 
     // TODO: Avoid this transpose?
     let l_pattern = u_pattern.transpose();

nalgebra-sparse/src/lib.rs

@@ -135,13 +135,13 @@
 #![deny(unused_results)]
 #![deny(missing_docs)]
 
+pub mod convert;
 pub mod coo;
 pub mod csc;
 pub mod csr;
-pub mod pattern;
-pub mod ops;
-pub mod convert;
 pub mod factorization;
+pub mod ops;
+pub mod pattern;
 
 pub(crate) mod cs;
 
@@ -151,16 +151,16 @@ pub mod proptest;
 #[cfg(feature = "compare")]
 mod matrixcompare;
 
+use num_traits::Zero;
 use std::error::Error;
 use std::fmt;
-use num_traits::Zero;
 
 /// Errors produced by functions that expect well-formed sparse format data.
 #[derive(Debug)]
 pub struct SparseFormatError {
     kind: SparseFormatErrorKind,
     // Currently we only use an underlying error for generating the `Display` impl
-    error: Box<dyn Error>
+    error: Box<dyn Error>,
 }
 
 impl SparseFormatError {
@@ -170,10 +170,7 @@ impl SparseFormatError {
     }
 
     pub(crate) fn from_kind_and_error(kind: SparseFormatErrorKind, error: Box<dyn Error>) -> Self {
-        Self {
+        Self { kind, error }
-            kind,
-            error
-        }
     }
 
     /// Helper functionality for more conveniently creating errors.
@@ -221,7 +218,7 @@ pub enum SparseEntry<'a, T> {
     /// is explicitly stored (a so-called "explicit zero").
     NonZero(&'a T),
     /// The entry is implicitly zero, i.e. it is not explicitly stored.
-    Zero
+    Zero,
 }
 
 impl<'a, T: Clone + Zero> SparseEntry<'a, T> {
@@ -232,7 +229,7 @@ impl<'a, T: Clone + Zero> SparseEntry<'a, T> {
     pub fn to_value(self) -> T {
         match self {
             SparseEntry::NonZero(value) => value.clone(),
-            SparseEntry::Zero => T::zero()
+            SparseEntry::Zero => T::zero(),
         }
     }
 }
@@ -248,7 +245,7 @@ pub enum SparseEntryMut<'a, T> {
     /// is explicitly stored (a so-called "explicit zero").
     NonZero(&'a mut T),
     /// The entry is implicitly zero i.e. it is not explicitly stored.
-    Zero
+    Zero,
 }
 
 impl<'a, T: Clone + Zero> SparseEntryMut<'a, T> {
@@ -259,7 +256,7 @@ impl<'a, T: Clone + Zero> SparseEntryMut<'a, T> {
     pub fn to_value(self) -> T {
         match self {
             SparseEntryMut::NonZero(value) => value.clone(),
-            SparseEntryMut::Zero => T::zero()
+            SparseEntryMut::Zero => T::zero(),
         }
     }
 }

nalgebra-sparse/src/matrixcompare.rs

@@ -1,9 +1,9 @@
 //! Implements core traits for use with `matrixcompare`.
-use crate::csr::CsrMatrix;
+use crate::coo::CooMatrix;
 use crate::csc::CscMatrix;
+use crate::csr::CsrMatrix;
 use matrixcompare_core;
 use matrixcompare_core::{Access, SparseAccess};
-use crate::coo::CooMatrix;
 
 macro_rules! impl_matrix_for_csr_csc {
     ($MatrixType:ident) => {
@@ -13,7 +13,9 @@ macro_rules! impl_matrix_for_csr_csc {
             }
 
             fn fetch_triplets(&self) -> Vec<(usize, usize, T)> {
-            self.triplet_iter().map(|(i, j, v)| (i, j, v.clone())).collect()
+                self.triplet_iter()
+                    .map(|(i, j, v)| (i, j, v.clone()))
+                    .collect()
             }
         }
 
@@ -30,7 +32,7 @@ macro_rules! impl_matrix_for_csr_csc {
                 Access::Sparse(self)
             }
         }
-    }
+    };
 }
 
 impl_matrix_for_csr_csc!(CsrMatrix);
@@ -42,7 +44,9 @@ impl<T: Clone> SparseAccess<T> for CooMatrix<T> {
     }
 
     fn fetch_triplets(&self) -> Vec<(usize, usize, T)> {
-        self.triplet_iter().map(|(i, j, v)| (i, j, v.clone())).collect()
+        self.triplet_iter()
+            .map(|(i, j, v)| (i, j, v.clone()))
+            .collect()
     }
 }
 

nalgebra-sparse/src/ops/impl_std_ops.rs

@@ -1,15 +1,20 @@
-use crate::csr::CsrMatrix;
 use crate::csc::CscMatrix;
+use crate::csr::CsrMatrix;
 
-use std::ops::{Add, Div, DivAssign, Mul, MulAssign, Sub, Neg};
+use crate::ops::serial::{
-use crate::ops::serial::{spadd_csr_prealloc, spadd_csc_prealloc, spadd_pattern, spmm_csr_pattern, spmm_csr_prealloc, spmm_csc_prealloc, spmm_csc_dense, spmm_csr_dense, spmm_csc_pattern};
+    spadd_csc_prealloc, spadd_csr_prealloc, spadd_pattern, spmm_csc_dense, spmm_csc_pattern,
-use nalgebra::{ClosedAdd, ClosedMul, ClosedSub, ClosedDiv, Scalar, Matrix, MatrixMN, Dim,
+    spmm_csc_prealloc, spmm_csr_dense, spmm_csr_pattern, spmm_csr_prealloc,
-               Dynamic, DefaultAllocator, U1};
+};
-use nalgebra::allocator::{Allocator};
+use crate::ops::Op;
-use nalgebra::constraint::{DimEq, ShapeConstraint};
+use nalgebra::allocator::Allocator;
-use num_traits::{Zero, One};
-use crate::ops::{Op};
 use nalgebra::base::storage::Storage;
+use nalgebra::constraint::{DimEq, ShapeConstraint};
+use nalgebra::{
+    ClosedAdd, ClosedDiv, ClosedMul, ClosedSub, DefaultAllocator, Dim, Dynamic, Matrix, MatrixMN,
+    Scalar, U1,
+};
+use num_traits::{One, Zero};
+use std::ops::{Add, Div, DivAssign, Mul, MulAssign, Neg, Sub};
 
 /// Helper macro for implementing binary operators for different matrix types
 /// See below for usage.
@@ -188,7 +193,7 @@ macro_rules! impl_neg {
     ($matrix_type:ident) => {
         impl<T> Neg for $matrix_type<T>
         where
-            T: Scalar + Neg<Output=T>
+            T: Scalar + Neg<Output = T>,
         {
             type Output = $matrix_type<T>;
 
@@ -202,7 +207,7 @@ macro_rules! impl_neg {
 
         impl<'a, T> Neg for &'a $matrix_type<T>
         where
-            T: Scalar + Neg<Output=T>
+            T: Scalar + Neg<Output = T>,
         {
             type Output = $matrix_type<T>;
 
@@ -211,10 +216,10 @@ macro_rules! impl_neg {
                 // obtain both the sparsity pattern and values from the matrix,
                 // and then modify the values before creating a new matrix from the pattern
                 // and negated values.
-                - self.clone()
+                -self.clone()
-            }
             }
         }
+    };
 }
 
 impl_neg!(CsrMatrix);

nalgebra-sparse/src/ops/mod.rs

@@ -148,13 +148,14 @@ impl<T> Op<T> {
     pub fn as_ref(&self) -> Op<&T> {
         match self {
             Op::NoOp(obj) => Op::NoOp(&obj),
-            Op::Transpose(obj) => Op::Transpose(&obj)
+            Op::Transpose(obj) => Op::Transpose(&obj),
         }
     }
 
     /// Converts the underlying data type.
     pub fn convert<U>(self) -> Op<U>
-        where T: Into<U>
+    where
+        T: Into<U>,
     {
         self.map_same_op(T::into)
     }
@@ -163,7 +164,7 @@ impl<T> Op<T> {
     pub fn map_same_op<U, F: FnOnce(T) -> U>(self, f: F) -> Op<U> {
         match self {
             Op::NoOp(obj) => Op::NoOp(f(obj)),
-            Op::Transpose(obj) => Op::Transpose(f(obj))
+            Op::Transpose(obj) => Op::Transpose(f(obj)),
         }
     }
 
@@ -181,7 +182,7 @@ impl<T> Op<T> {
     pub fn transposed(self) -> Self {
         match self {
             Op::NoOp(obj) => Op::Transpose(obj),
-            Op::Transpose(obj) => Op::NoOp(obj)
+            Op::Transpose(obj) => Op::NoOp(obj),
         }
     }
 }
@@ -191,4 +192,3 @@ impl<T> From<T> for Op<T> {
         Self::NoOp(obj)
     }
 }
-

nalgebra-sparse/src/ops/serial/cs.rs

@@ -1,14 +1,15 @@
 use crate::cs::CsMatrix;
+use crate::ops::serial::{OperationError, OperationErrorKind};
 use crate::ops::Op;
-use crate::ops::serial::{OperationErrorKind, OperationError};
-use nalgebra::{Scalar, ClosedAdd, ClosedMul, DMatrixSliceMut, DMatrixSlice};
-use num_traits::{Zero, One};
 use crate::SparseEntryMut;
+use nalgebra::{ClosedAdd, ClosedMul, DMatrixSlice, DMatrixSliceMut, Scalar};
+use num_traits::{One, Zero};
 
 fn spmm_cs_unexpected_entry() -> OperationError {
     OperationError::from_kind_and_message(
         OperationErrorKind::InvalidPattern,
-        String::from("Found unexpected entry that is not present in `c`."))
+        String::from("Found unexpected entry that is not present in `c`."),
+    )
 }
 
 /// Helper functionality for implementing CSR/CSC SPMM.
@@ -24,12 +25,12 @@ pub fn spmm_cs_prealloc<T>(
     c: &mut CsMatrix<T>,
     alpha: T,
     a: &CsMatrix<T>,
-    b: &CsMatrix<T>)
+    b: &CsMatrix<T>,
-    -> Result<(), OperationError>
+) -> Result<(), OperationError>
-    where
+where
-        T: Scalar + ClosedAdd + ClosedMul + Zero + One
+    T: Scalar + ClosedAdd + ClosedMul + Zero + One,
 {
-    for i in 0 .. c.pattern().major_dim() {
+    for i in 0..c.pattern().major_dim() {
         let a_lane_i = a.get_lane(i).unwrap();
         let mut c_lane_i = c.get_lane_mut(i).unwrap();
         for c_ij in c_lane_i.values_mut() {
@@ -42,14 +43,15 @@ pub fn spmm_cs_prealloc<T>(
             let alpha_aik = alpha.inlined_clone() * a_ik.inlined_clone();
             for (j, b_kj) in b_lane_k.minor_indices().iter().zip(b_lane_k.values()) {
                 // Determine the location in C to append the value
-                let (c_local_idx, _) = c_lane_i_cols.iter()
+                let (c_local_idx, _) = c_lane_i_cols
+                    .iter()
                     .enumerate()
                     .find(|(_, c_col)| *c_col == j)
                     .ok_or_else(spmm_cs_unexpected_entry)?;
 
                 c_lane_i_values[c_local_idx] += alpha_aik.inlined_clone() * b_kj.inlined_clone();
-                c_lane_i_cols = &c_lane_i_cols[c_local_idx ..];
+                c_lane_i_cols = &c_lane_i_cols[c_local_idx..];
-                c_lane_i_values = &mut c_lane_i_values[c_local_idx ..];
+                c_lane_i_values = &mut c_lane_i_values[c_local_idx..];
             }
         }
     }
@@ -60,17 +62,19 @@ pub fn spmm_cs_prealloc<T>(
 fn spadd_cs_unexpected_entry() -> OperationError {
     OperationError::from_kind_and_message(
         OperationErrorKind::InvalidPattern,
-        String::from("Found entry in `op(a)` that is not present in `c`."))
+        String::from("Found entry in `op(a)` that is not present in `c`."),
+    )
 }
 
 /// Helper functionality for implementing CSR/CSC SPADD.
-pub fn spadd_cs_prealloc<T>(beta: T,
+pub fn spadd_cs_prealloc<T>(
+    beta: T,
     c: &mut CsMatrix<T>,
     alpha: T,
-                             a: Op<&CsMatrix<T>>)
+    a: Op<&CsMatrix<T>>,
-                             -> Result<(), OperationError>
+) -> Result<(), OperationError>
-    where
+where
-        T: Scalar + ClosedAdd + ClosedMul + Zero + One
+    T: Scalar + ClosedAdd + ClosedMul + Zero + One,
 {
     match a {
         Op::NoOp(a) => {
@@ -88,13 +92,14 @@ pub fn spadd_cs_prealloc<T>(beta: T,
                     // TODO: Use exponential search instead of linear search.
                     // If C has substantially more entries in the row than A, then a line search
                     // will needlessly visit many entries in C.
-                    let (c_idx, _) = c_minors.iter()
+                    let (c_idx, _) = c_minors
+                        .iter()
                         .enumerate()
                         .find(|(_, c_col)| *c_col == a_col)
                         .ok_or_else(spadd_cs_unexpected_entry)?;
                     c_vals[c_idx] += alpha.inlined_clone() * a_val.inlined_clone();
-                    c_minors = &c_minors[c_idx ..];
+                    c_minors = &c_minors[c_idx..];
-                    c_vals = &mut c_vals[c_idx ..];
+                    c_vals = &mut c_vals[c_idx..];
                 }
             }
         }
@@ -110,7 +115,7 @@ pub fn spadd_cs_prealloc<T>(beta: T,
                     let a_val = a_val.inlined_clone();
                     let alpha = alpha.inlined_clone();
                     match c.get_entry_mut(j, i).unwrap() {
-                        SparseEntryMut::NonZero(c_ji) => { *c_ji += alpha * a_val }
+                        SparseEntryMut::NonZero(c_ji) => *c_ji += alpha * a_val,
                         SparseEntryMut::Zero => return Err(spadd_cs_unexpected_entry()),
                     }
                 }
@@ -124,13 +129,14 @@ pub fn spadd_cs_prealloc<T>(beta: T,
 ///
 /// The implementation essentially assumes that `a` is a CSR matrix. To use it with CSC matrices,
 /// the transposed operation must be specified for the CSC matrix.
-pub fn spmm_cs_dense<T>(beta: T,
+pub fn spmm_cs_dense<T>(
+    beta: T,
     mut c: DMatrixSliceMut<T>,
     alpha: T,
     a: Op<&CsMatrix<T>>,
-                        b: Op<DMatrixSlice<T>>)
+    b: Op<DMatrixSlice<T>>,
-    where
+) where
-        T: Scalar + ClosedAdd + ClosedMul + Zero + One
+    T: Scalar + ClosedAdd + ClosedMul + Zero + One,
 {
     match a {
         Op::NoOp(a) => {
@@ -139,17 +145,17 @@ pub fn spmm_cs_dense<T>(beta: T,
                 for (c_ij, a_row_i) in c_col_j.iter_mut().zip(a.lane_iter()) {
                     let mut dot_ij = T::zero();
                     for (&k, a_ik) in a_row_i.minor_indices().iter().zip(a_row_i.values()) {
-                        let b_contrib =
+                        let b_contrib = match b {
-                            match b {
                             Op::NoOp(ref b) => b.index((k, j)),
-                                Op::Transpose(ref b) => b.index((j, k))
+                            Op::Transpose(ref b) => b.index((j, k)),
                         };
                         dot_ij += a_ik.inlined_clone() * b_contrib.inlined_clone();
                     }
-                    *c_ij = beta.inlined_clone() * c_ij.inlined_clone() + alpha.inlined_clone() * dot_ij;
+                    *c_ij = beta.inlined_clone() * c_ij.inlined_clone()
+                        + alpha.inlined_clone() * dot_ij;
+                }
             }
         }
-        },
         Op::Transpose(a) => {
             // In this case, we have to pre-multiply C by beta
             c *= beta;
@@ -165,17 +171,16 @@ pub fn spmm_cs_dense<T>(beta: T,
                             for (c_ij, b_kj) in c_row_i.iter_mut().zip(b_row_k.iter()) {
                                 *c_ij += gamma_ki.inlined_clone() * b_kj.inlined_clone();
                             }
-                        },
+                        }
                         Op::Transpose(ref b) => {
                             let b_col_k = b.column(k);
                             for (c_ij, b_jk) in c_row_i.iter_mut().zip(b_col_k.iter()) {
                                 *c_ij += gamma_ki.inlined_clone() * b_jk.inlined_clone();
                             }
-                        },
                         }
                     }
                 }
-        },
+            }
+        }
     }
 }
-

nalgebra-sparse/src/ops/serial/csc.rs

@@ -1,9 +1,9 @@
 use crate::csc::CscMatrix;
-use crate::ops::Op;
+use crate::ops::serial::cs::{spadd_cs_prealloc, spmm_cs_dense, spmm_cs_prealloc};
-use crate::ops::serial::cs::{spmm_cs_prealloc, spmm_cs_dense, spadd_cs_prealloc};
 use crate::ops::serial::{OperationError, OperationErrorKind};
-use nalgebra::{Scalar, ClosedAdd, ClosedMul, DMatrixSliceMut, DMatrixSlice, RealField};
+use crate::ops::Op;
-use num_traits::{Zero, One};
+use nalgebra::{ClosedAdd, ClosedMul, DMatrixSlice, DMatrixSliceMut, RealField, Scalar};
+use num_traits::{One, Zero};
 
 use std::borrow::Cow;
 
@@ -12,25 +12,27 @@ use std::borrow::Cow;
 /// # Panics
 ///
 /// Panics if the dimensions of the matrices involved are not compatible with the expression.
-pub fn spmm_csc_dense<'a, T>(beta: T,
+pub fn spmm_csc_dense<'a, T>(
+    beta: T,
     c: impl Into<DMatrixSliceMut<'a, T>>,
     alpha: T,
     a: Op<&CscMatrix<T>>,
-                             b: Op<impl Into<DMatrixSlice<'a, T>>>)
+    b: Op<impl Into<DMatrixSlice<'a, T>>>,
-    where
+) where
-        T: Scalar + ClosedAdd + ClosedMul + Zero + One
+    T: Scalar + ClosedAdd + ClosedMul + Zero + One,
 {
     let b = b.convert();
     spmm_csc_dense_(beta, c.into(), alpha, a, b)
 }
 
-fn spmm_csc_dense_<T>(beta: T,
+fn spmm_csc_dense_<T>(
+    beta: T,
     c: DMatrixSliceMut<T>,
     alpha: T,
     a: Op<&CscMatrix<T>>,
-                      b: Op<DMatrixSlice<T>>)
+    b: Op<DMatrixSlice<T>>,
-    where
+) where
-        T: Scalar + ClosedAdd + ClosedMul + Zero + One
+    T: Scalar + ClosedAdd + ClosedMul + Zero + One,
 {
     assert_compatible_spmm_dims!(c, a, b);
     // Need to interpret matrix as transposed since the spmm_cs_dense function assumes CSR layout
@@ -46,19 +48,19 @@ fn spmm_csc_dense_<T>(beta: T,
 /// # Panics
 ///
 /// Panics if the dimensions of the matrices involved are not compatible with the expression.
-pub fn spadd_csc_prealloc<T>(beta: T,
+pub fn spadd_csc_prealloc<T>(
+    beta: T,
     c: &mut CscMatrix<T>,
     alpha: T,
-                             a: Op<&CscMatrix<T>>)
+    a: Op<&CscMatrix<T>>,
-                             -> Result<(), OperationError>
+) -> Result<(), OperationError>
-    where
+where
-        T: Scalar + ClosedAdd + ClosedMul + Zero + One
+    T: Scalar + ClosedAdd + ClosedMul + Zero + One,
 {
     assert_compatible_spadd_dims!(c, a);
     spadd_cs_prealloc(beta, &mut c.cs, alpha, a.map_same_op(|a| &a.cs))
 }
 
-
 /// Sparse-sparse matrix multiplication, `C <- beta * C + alpha * op(A) * op(B)`.
 ///
 /// # Errors
@@ -74,10 +76,10 @@ pub fn spmm_csc_prealloc<T>(
     c: &mut CscMatrix<T>,
     alpha: T,
     a: Op<&CscMatrix<T>>,
-    b: Op<&CscMatrix<T>>)
+    b: Op<&CscMatrix<T>>,
-    -> Result<(), OperationError>
+) -> Result<(), OperationError>
-    where
+where
-        T: Scalar + ClosedAdd + ClosedMul + Zero + One
+    T: Scalar + ClosedAdd + ClosedMul + Zero + One,
 {
     assert_compatible_spmm_dims!(c, a, b);
 
@@ -87,7 +89,7 @@ pub fn spmm_csc_prealloc<T>(
         (NoOp(ref a), NoOp(ref b)) => {
             // Note: We have to reverse the order for CSC matrices
             spmm_cs_prealloc(beta, &mut c.cs, alpha, &b.cs, &a.cs)
-        },
+        }
         _ => {
             // Currently we handle transposition by explicitly precomputing transposed matrices
             // and calling the operation again without transposition
@@ -99,7 +101,9 @@ pub fn spmm_csc_prealloc<T>(
                     (NoOp(_), NoOp(_)) => unreachable!(),
                     (Transpose(ref a), NoOp(_)) => (Owned(a.transpose()), Borrowed(b_ref)),
                     (NoOp(_), Transpose(ref b)) => (Borrowed(a_ref), Owned(b.transpose())),
-                    (Transpose(ref a), Transpose(ref b)) => (Owned(a.transpose()), Owned(b.transpose()))
+                    (Transpose(ref a), Transpose(ref b)) => {
+                        (Owned(a.transpose()), Owned(b.transpose()))
+                    }
                 }
             };
 
@@ -121,13 +125,20 @@ pub fn spmm_csc_prealloc<T>(
 /// Panics if `L` is not square, or if `L` and `B` are not dimensionally compatible.
 pub fn spsolve_csc_lower_triangular<'a, T: RealField>(
     l: Op<&CscMatrix<T>>,
-    b: impl Into<DMatrixSliceMut<'a, T>>)
+    b: impl Into<DMatrixSliceMut<'a, T>>,
-    -> Result<(), OperationError>
+) -> Result<(), OperationError> {
-{
     let b = b.into();
     let l_matrix = l.into_inner();
-    assert_eq!(l_matrix.nrows(), l_matrix.ncols(), "Matrix must be square for triangular solve.");
+    assert_eq!(
-    assert_eq!(l_matrix.nrows(), b.nrows(), "Dimension mismatch in sparse lower triangular solver.");
+        l_matrix.nrows(),
+        l_matrix.ncols(),
+        "Matrix must be square for triangular solve."
+    );
+    assert_eq!(
+        l_matrix.nrows(),
+        b.nrows(),
+        "Dimension mismatch in sparse lower triangular solver."
+    );
     match l {
         Op::NoOp(a) => spsolve_csc_lower_triangular_no_transpose(a, b),
         Op::Transpose(a) => spsolve_csc_lower_triangular_transpose(a, b),
@@ -136,16 +147,15 @@ pub fn spsolve_csc_lower_triangular<'a, T: RealField>(
 
 fn spsolve_csc_lower_triangular_no_transpose<T: RealField>(
     l: &CscMatrix<T>,
-    b: DMatrixSliceMut<T>)
+    b: DMatrixSliceMut<T>,
-    -> Result<(), OperationError>
+) -> Result<(), OperationError> {
-{
     let mut x = b;
 
     // Solve column-by-column
-    for j in 0 .. x.ncols() {
+    for j in 0..x.ncols() {
         let mut x_col_j = x.column_mut(j);
 
-        for k in 0 .. l.ncols() {
+        for k in 0..l.ncols() {
             let l_col_k = l.col(k);
 
             // Skip entries above the diagonal
@@ -163,8 +173,8 @@ fn spsolve_csc_lower_triangular_no_transpose<T: RealField>(
                     // Copy value after updating (so we don't run into the borrow checker)
                     let x_kj = x_col_j[k];
 
-                    let row_indices = &l_col_k.row_indices()[(diag_csc_index + 1) ..];
+                    let row_indices = &l_col_k.row_indices()[(diag_csc_index + 1)..];
-                    let l_values = &l_col_k.values()[(diag_csc_index + 1) ..];
+                    let l_values = &l_col_k.values()[(diag_csc_index + 1)..];
 
                     // Note: The remaining entries are below the diagonal
                     for (&i, l_ik) in row_indices.iter().zip(l_values) {
@@ -187,24 +197,26 @@ fn spsolve_csc_lower_triangular_no_transpose<T: RealField>(
 
 fn spsolve_encountered_zero_diagonal() -> Result<(), OperationError> {
     let message = "Matrix contains at least one diagonal entry that is zero.";
-    Err(OperationError::from_kind_and_message(OperationErrorKind::Singular, String::from(message)))
+    Err(OperationError::from_kind_and_message(
+        OperationErrorKind::Singular,
+        String::from(message),
+    ))
 }
 
 fn spsolve_csc_lower_triangular_transpose<T: RealField>(
     l: &CscMatrix<T>,
-    b: DMatrixSliceMut<T>)
+    b: DMatrixSliceMut<T>,
-    -> Result<(), OperationError>
+) -> Result<(), OperationError> {
-{
     let mut x = b;
 
     // Solve column-by-column
-    for j in 0 .. x.ncols() {
+    for j in 0..x.ncols() {
         let mut x_col_j = x.column_mut(j);
 
         // Due to the transposition, we're essentially solving an upper triangular system,
         // and the columns in our matrix become rows
 
-        for i in (0 .. l.ncols()).rev() {
+        for i in (0..l.ncols()).rev() {
             let l_col_i = l.col(i);
 
             // Skip entries above the diagonal
@@ -220,8 +232,8 @@ fn spsolve_csc_lower_triangular_transpose<T: RealField>(
                     // Copy value after updating (so we don't run into the borrow checker)
                     let mut x_ii = x_col_j[i];
 
-                    let row_indices = &l_col_i.row_indices()[(diag_csc_index + 1) ..];
+                    let row_indices = &l_col_i.row_indices()[(diag_csc_index + 1)..];
-                    let a_values = &l_col_i.values()[(diag_csc_index + 1) ..];
+                    let a_values = &l_col_i.values()[(diag_csc_index + 1)..];
 
                     // Note: The remaining entries are below the diagonal
                     for (&k, &l_ki) in row_indices.iter().zip(a_values) {

nalgebra-sparse/src/ops/serial/csr.rs

@@ -1,31 +1,33 @@
 use crate::csr::CsrMatrix;
-use crate::ops::{Op};
+use crate::ops::serial::cs::{spadd_cs_prealloc, spmm_cs_dense, spmm_cs_prealloc};
-use crate::ops::serial::{OperationError};
+use crate::ops::serial::OperationError;
-use nalgebra::{Scalar, DMatrixSlice, ClosedAdd, ClosedMul, DMatrixSliceMut};
+use crate::ops::Op;
-use num_traits::{Zero, One};
+use nalgebra::{ClosedAdd, ClosedMul, DMatrixSlice, DMatrixSliceMut, Scalar};
+use num_traits::{One, Zero};
 use std::borrow::Cow;
-use crate::ops::serial::cs::{spmm_cs_prealloc, spmm_cs_dense, spadd_cs_prealloc};
 
 /// Sparse-dense matrix-matrix multiplication `C <- beta * C + alpha * op(A) * op(B)`.
-pub fn spmm_csr_dense<'a, T>(beta: T,
+pub fn spmm_csr_dense<'a, T>(
+    beta: T,
     c: impl Into<DMatrixSliceMut<'a, T>>,
     alpha: T,
     a: Op<&CsrMatrix<T>>,
-                             b: Op<impl Into<DMatrixSlice<'a, T>>>)
+    b: Op<impl Into<DMatrixSlice<'a, T>>>,
-    where
+) where
-        T: Scalar + ClosedAdd + ClosedMul + Zero + One
+    T: Scalar + ClosedAdd + ClosedMul + Zero + One,
 {
     let b = b.convert();
     spmm_csr_dense_(beta, c.into(), alpha, a, b)
 }
 
-fn spmm_csr_dense_<T>(beta: T,
+fn spmm_csr_dense_<T>(
+    beta: T,
     c: DMatrixSliceMut<T>,
     alpha: T,
     a: Op<&CsrMatrix<T>>,
-                      b: Op<DMatrixSlice<T>>)
+    b: Op<DMatrixSlice<T>>,
-where
+) where
-    T: Scalar + ClosedAdd + ClosedMul + Zero + One
+    T: Scalar + ClosedAdd + ClosedMul + Zero + One,
 {
     assert_compatible_spmm_dims!(c, a, b);
     spmm_cs_dense(beta, c, alpha, a.map_same_op(|a| &a.cs), b)
@@ -41,13 +43,14 @@ where
 /// # Panics
 ///
 /// Panics if the dimensions of the matrices involved are not compatible with the expression.
-pub fn spadd_csr_prealloc<T>(beta: T,
+pub fn spadd_csr_prealloc<T>(
+    beta: T,
     c: &mut CsrMatrix<T>,
     alpha: T,
-                             a: Op<&CsrMatrix<T>>)
+    a: Op<&CsrMatrix<T>>,
-                             -> Result<(), OperationError>
+) -> Result<(), OperationError>
 where
-    T: Scalar + ClosedAdd + ClosedMul + Zero + One
+    T: Scalar + ClosedAdd + ClosedMul + Zero + One,
 {
     assert_compatible_spadd_dims!(c, a);
     spadd_cs_prealloc(beta, &mut c.cs, alpha, a.map_same_op(|a| &a.cs))
@@ -67,19 +70,17 @@ pub fn spmm_csr_prealloc<T>(
     c: &mut CsrMatrix<T>,
     alpha: T,
     a: Op<&CsrMatrix<T>>,
-    b: Op<&CsrMatrix<T>>)
+    b: Op<&CsrMatrix<T>>,
--> Result<(), OperationError>
+) -> Result<(), OperationError>
 where
-    T: Scalar + ClosedAdd + ClosedMul + Zero + One
+    T: Scalar + ClosedAdd + ClosedMul + Zero + One,
 {
     assert_compatible_spmm_dims!(c, a, b);
 
     use Op::{NoOp, Transpose};
 
     match (&a, &b) {
-        (NoOp(ref a), NoOp(ref b)) => {
+        (NoOp(ref a), NoOp(ref b)) => spmm_cs_prealloc(beta, &mut c.cs, alpha, &a.cs, &b.cs),
-            spmm_cs_prealloc(beta, &mut c.cs, alpha, &a.cs, &b.cs)
-        },
         _ => {
             // Currently we handle transposition by explicitly precomputing transposed matrices
             // and calling the operation again without transposition
@@ -93,7 +94,9 @@ where
                     (NoOp(_), NoOp(_)) => unreachable!(),
                     (Transpose(ref a), NoOp(_)) => (Owned(a.transpose()), Borrowed(b_ref)),
                     (NoOp(_), Transpose(ref b)) => (Borrowed(a_ref), Owned(b.transpose())),
-                    (Transpose(ref a), Transpose(ref b)) => (Owned(a.transpose()), Owned(b.transpose()))
+                    (Transpose(ref a), Transpose(ref b)) => {
+                        (Owned(a.transpose()), Owned(b.transpose()))
+                    }
                 }
             };
 
@@ -101,4 +104,3 @@ where
         }
     }
 }
-

nalgebra-sparse/src/ops/serial/mod.rs

@@ -10,33 +10,31 @@
 
 #[macro_use]
 macro_rules! assert_compatible_spmm_dims {
-    ($c:expr, $a:expr, $b:expr) => {
+    ($c:expr, $a:expr, $b:expr) => {{
-        {
         use crate::ops::Op::{NoOp, Transpose};
         match (&$a, &$b) {
             (NoOp(ref a), NoOp(ref b)) => {
                 assert_eq!($c.nrows(), a.nrows(), "C.nrows() != A.nrows()");
                 assert_eq!($c.ncols(), b.ncols(), "C.ncols() != B.ncols()");
                 assert_eq!(a.ncols(), b.nrows(), "A.ncols() != B.nrows()");
-                },
+            }
             (Transpose(ref a), NoOp(ref b)) => {
                 assert_eq!($c.nrows(), a.ncols(), "C.nrows() != A.ncols()");
                 assert_eq!($c.ncols(), b.ncols(), "C.ncols() != B.ncols()");
                 assert_eq!(a.nrows(), b.nrows(), "A.nrows() != B.nrows()");
-                },
+            }
             (NoOp(ref a), Transpose(ref b)) => {
                 assert_eq!($c.nrows(), a.nrows(), "C.nrows() != A.nrows()");
                 assert_eq!($c.ncols(), b.nrows(), "C.ncols() != B.nrows()");
                 assert_eq!(a.ncols(), b.ncols(), "A.ncols() != B.ncols()");
-                },
+            }
             (Transpose(ref a), Transpose(ref b)) => {
                 assert_eq!($c.nrows(), a.ncols(), "C.nrows() != A.ncols()");
                 assert_eq!($c.ncols(), b.nrows(), "C.ncols() != B.nrows()");
                 assert_eq!(a.nrows(), b.ncols(), "A.nrows() != B.ncols()");
             }
         }
-        }
+    }};
-    }
 }
 
 #[macro_use]
@@ -47,32 +45,31 @@ macro_rules! assert_compatible_spadd_dims {
             Op::NoOp(a) => {
                 assert_eq!($c.nrows(), a.nrows(), "C.nrows() != A.nrows()");
                 assert_eq!($c.ncols(), a.ncols(), "C.ncols() != A.ncols()");
-            },
+            }
             Op::Transpose(a) => {
                 assert_eq!($c.nrows(), a.ncols(), "C.nrows() != A.ncols()");
                 assert_eq!($c.ncols(), a.nrows(), "C.ncols() != A.nrows()");
             }
         }
-
+    };
-    }
 }
 
+mod cs;
 mod csc;
 mod csr;
 mod pattern;
-mod cs;
 
 pub use csc::*;
 pub use csr::*;
 pub use pattern::*;
-use std::fmt::Formatter;
 use std::fmt;
+use std::fmt::Formatter;
 
 /// A description of the error that occurred during an arithmetic operation.
 #[derive(Clone, Debug)]
 pub struct OperationError {
     error_kind: OperationErrorKind,
-    message: String
+    message: String,
 }
 
 /// The different kinds of operation errors that may occur.
@@ -92,7 +89,10 @@ pub enum OperationErrorKind {
 
 impl OperationError {
     fn from_kind_and_message(error_type: OperationErrorKind, message: String) -> Self {
-        Self { error_kind: error_type, message }
+        Self {
+            error_kind: error_type,
+            message,
+        }
     }
 
     /// The operation error kind.
@@ -110,8 +110,12 @@ impl fmt::Display for OperationError {
     fn fmt(&self, f: &mut Formatter<'_>) -> fmt::Result {
         write!(f, "Sparse matrix operation error: ")?;
         match self.kind() {
-            OperationErrorKind::InvalidPattern => { write!(f, "InvalidPattern")?; }
+            OperationErrorKind::InvalidPattern => {
-            OperationErrorKind::Singular => { write!(f, "Singular")?; }
+                write!(f, "InvalidPattern")?;
+            }
+            OperationErrorKind::Singular => {
+                write!(f, "Singular")?;
+            }
         }
         write!(f, " Message: {}", self.message)
     }

nalgebra-sparse/src/ops/serial/pattern.rs

@@ -12,11 +12,17 @@ use std::iter;
 /// # Panics
 ///
 /// Panics if the patterns do not have the same major and minor dimensions.
-pub fn spadd_pattern(a: &SparsityPattern,
+pub fn spadd_pattern(a: &SparsityPattern, b: &SparsityPattern) -> SparsityPattern {
-                     b: &SparsityPattern) -> SparsityPattern
+    assert_eq!(
-{
+        a.major_dim(),
-    assert_eq!(a.major_dim(), b.major_dim(), "Patterns must have identical major dimensions.");
+        b.major_dim(),
-    assert_eq!(a.minor_dim(), b.minor_dim(), "Patterns must have identical minor dimensions.");
+        "Patterns must have identical major dimensions."
+    );
+    assert_eq!(
+        a.minor_dim(),
+        b.minor_dim(),
+        "Patterns must have identical minor dimensions."
+    );
 
     let mut offsets = Vec::new();
     let mut indices = Vec::new();
@@ -25,7 +31,7 @@ pub fn spadd_pattern(a: &SparsityPattern,
 
     offsets.push(0);
 
-    for lane_idx in 0 .. a.major_dim() {
+    for lane_idx in 0..a.major_dim() {
         let lane_a = a.lane(lane_idx);
         let lane_b = b.lane(lane_idx);
         indices.extend(iterate_union(lane_a, lane_b));
@@ -33,8 +39,7 @@ pub fn spadd_pattern(a: &SparsityPattern,
     }
 
     // TODO: Consider circumventing format checks? (requires unsafe, should benchmark first)
-    SparsityPattern::try_from_offsets_and_indices(
+    SparsityPattern::try_from_offsets_and_indices(a.major_dim(), a.minor_dim(), offsets, indices)
-        a.major_dim(), a.minor_dim(), offsets, indices)
         .expect("Internal error: Pattern must be valid by definition")
 }
 
@@ -66,7 +71,11 @@ pub fn spmm_csc_pattern(a: &SparsityPattern, b: &SparsityPattern) -> SparsityPat
 /// Panics if the patterns, when interpreted as CSR patterns, are not compatible for
 /// matrix multiplication.
 pub fn spmm_csr_pattern(a: &SparsityPattern, b: &SparsityPattern) -> SparsityPattern {
-    assert_eq!(a.minor_dim(), b.major_dim(), "a and b must have compatible dimensions");
+    assert_eq!(
+        a.minor_dim(),
+        b.major_dim(),
+        "a and b must have compatible dimensions"
+    );
 
     let mut offsets = Vec::new();
     let mut indices = Vec::new();
@@ -78,7 +87,7 @@ pub fn spmm_csr_pattern(a: &SparsityPattern, b: &SparsityPattern) -> SparsityPat
     // (would cut memory use to 1/8, which might help reduce cache misses)
     let mut visited = vec![false; b.minor_dim()];
 
-    for i in 0 .. a.major_dim() {
+    for i in 0..a.major_dim() {
         let a_lane_i = a.lane(i);
         let c_lane_i_offset = *offsets.last().unwrap();
         for &k in a_lane_i {
@@ -93,7 +102,7 @@ pub fn spmm_csr_pattern(a: &SparsityPattern, b: &SparsityPattern) -> SparsityPat
             }
         }
 
-        let c_lane_i = &mut indices[c_lane_i_offset ..];
+        let c_lane_i = &mut indices[c_lane_i_offset..];
         c_lane_i.sort_unstable();
 
         // Reset visits so that visited[j] == false for all j for the next major lane
@@ -110,21 +119,23 @@ pub fn spmm_csr_pattern(a: &SparsityPattern, b: &SparsityPattern) -> SparsityPat
 
 /// Iterate over the union of the two sets represented by sorted slices
 /// (with unique elements)
-fn iterate_union<'a>(mut sorted_a: &'a [usize],
+fn iterate_union<'a>(
-                     mut sorted_b: &'a [usize]) -> impl Iterator<Item=usize> + 'a {
+    mut sorted_a: &'a [usize],
+    mut sorted_b: &'a [usize],
+) -> impl Iterator<Item = usize> + 'a {
     iter::from_fn(move || {
         if let (Some(a_item), Some(b_item)) = (sorted_a.first(), sorted_b.first()) {
             let item = if a_item < b_item {
-                sorted_a = &sorted_a[1 ..];
+                sorted_a = &sorted_a[1..];
                 a_item
             } else if b_item < a_item {
-                sorted_b = &sorted_b[1 ..];
+                sorted_b = &sorted_b[1..];
                 b_item
             } else {
                 // Both lists contain the same element, advance both slices to avoid
                 // duplicate entries in the result
-                sorted_a = &sorted_a[1 ..];
+                sorted_a = &sorted_a[1..];
-                sorted_b = &sorted_b[1 ..];
+                sorted_b = &sorted_b[1..];
                 a_item
             };
             Some(*item)

nalgebra-sparse/src/pattern.rs

@@ -1,8 +1,8 @@
 //! Sparsity patterns for CSR and CSC matrices.
-use crate::SparseFormatError;
-use std::fmt;
-use std::error::Error;
 use crate::cs::transpose_cs;
+use crate::SparseFormatError;
+use std::error::Error;
+use std::fmt;
 
 /// A representation of the sparsity pattern of a CSR or CSC matrix.
 ///
@@ -137,7 +137,7 @@ impl SparsityPattern {
         // minor indices within a lane are sorted, unique. In addition, each minor index
         // must be in bounds with respect to the minor dimension.
         {
-            for lane_idx in 0 .. major_dim {
+            for lane_idx in 0..major_dim {
                 let range_start = major_offsets[lane_idx];
                 let range_end = major_offsets[lane_idx + 1];
 
@@ -146,7 +146,7 @@ impl SparsityPattern {
                     return Err(NonmonotonicOffsets);
                 }
 
-                let minor_indices = &minor_indices[range_start .. range_end];
+                let minor_indices = &minor_indices[range_start..range_end];
 
                 // We test for in-bounds, uniqueness and monotonicity at the same time
                 // to ensure that we only visit each minor index once
@@ -236,12 +236,15 @@ impl SparsityPattern {
             self.minor_dim(),
             self.major_offsets(),
             self.minor_indices(),
-                     &values);
+            &values,
+        );
         // TODO: Skip checks
-        Self::try_from_offsets_and_indices(self.minor_dim(),
+        Self::try_from_offsets_and_indices(
+            self.minor_dim(),
             self.major_dim(),
             new_offsets,
-                                           new_indices)
+            new_indices,
+        )
         .expect("Internal error: Transpose should never fail.")
     }
 }
@@ -275,22 +278,25 @@ pub enum SparsityPatternFormatError {
 
 impl From<SparsityPatternFormatError> for SparseFormatError {
     fn from(err: SparsityPatternFormatError) -> Self {
-        use SparsityPatternFormatError::*;
-        use SparsityPatternFormatError::DuplicateEntry as PatternDuplicateEntry;
         use crate::SparseFormatErrorKind;
         use crate::SparseFormatErrorKind::*;
+        use SparsityPatternFormatError::DuplicateEntry as PatternDuplicateEntry;
+        use SparsityPatternFormatError::*;
         match err {
             InvalidOffsetArrayLength
             | InvalidOffsetFirstLast
             | NonmonotonicOffsets
-            | NonmonotonicMinorIndices
+            | NonmonotonicMinorIndices => {
-                => SparseFormatError::from_kind_and_error(InvalidStructure, Box::from(err)),
+                SparseFormatError::from_kind_and_error(InvalidStructure, Box::from(err))
-            MinorIndexOutOfBounds
+            }
-                => SparseFormatError::from_kind_and_error(IndexOutOfBounds,
+            MinorIndexOutOfBounds => {
-                                                          Box::from(err)),
+                SparseFormatError::from_kind_and_error(IndexOutOfBounds, Box::from(err))
-            PatternDuplicateEntry
+            }
-                => SparseFormatError::from_kind_and_error(SparseFormatErrorKind::DuplicateEntry,
+            PatternDuplicateEntry => SparseFormatError::from_kind_and_error(
-                                                          Box::from(err)),
+                #[allow(unused_qualifications)]
+                SparseFormatErrorKind::DuplicateEntry,
+                Box::from(err),
+            ),
         }
     }
 }
@@ -300,22 +306,25 @@ impl fmt::Display for SparsityPatternFormatError {
         match self {
             SparsityPatternFormatError::InvalidOffsetArrayLength => {
                 write!(f, "Length of offset array is not equal to (major_dim + 1).")
-            },
+            }
             SparsityPatternFormatError::InvalidOffsetFirstLast => {
                 write!(f, "First or last offset is incompatible with format.")
-            },
+            }
             SparsityPatternFormatError::NonmonotonicOffsets => {
                 write!(f, "Offsets are not monotonically increasing.")
-            },
+            }
             SparsityPatternFormatError::MinorIndexOutOfBounds => {
                 write!(f, "A minor index is out of bounds.")
-            },
+            }
             SparsityPatternFormatError::DuplicateEntry => {
                 write!(f, "Input data contains duplicate entries.")
-            },
+            }
             SparsityPatternFormatError::NonmonotonicMinorIndices => {
-                write!(f, "Minor indices are not monotonically increasing within each lane.")
+                write!(
-            },
+                    f,
+                    "Minor indices are not monotonically increasing within each lane."
+                )
+            }
         }
     }
 }
@@ -335,12 +344,12 @@ pub struct SparsityPatternIter<'a> {
 impl<'a> SparsityPatternIter<'a> {
     fn from_pattern(pattern: &'a SparsityPattern) -> Self {
         let first_lane_end = pattern.major_offsets().get(1).unwrap_or(&0);
-        let minors_in_first_lane = &pattern.minor_indices()[0 .. *first_lane_end];
+        let minors_in_first_lane = &pattern.minor_indices()[0..*first_lane_end];
         Self {
             major_offsets: pattern.major_offsets(),
             minor_indices: pattern.minor_indices(),
             current_lane_idx: 0,
-            remaining_minors_in_lane: minors_in_first_lane
+            remaining_minors_in_lane: minors_in_first_lane,
         }
     }
 }
@@ -374,12 +383,11 @@ impl<'a> Iterator for SparsityPatternIter<'a> {
                     let lower = self.major_offsets[self.current_lane_idx];
                     let upper = self.major_offsets[self.current_lane_idx + 1];
                     if upper > lower {
-                        self.remaining_minors_in_lane = &self.minor_indices[(lower + 1) .. upper];
+                        self.remaining_minors_in_lane = &self.minor_indices[(lower + 1)..upper];
-                        return Some((self.current_lane_idx, self.minor_indices[lower]))
+                        return Some((self.current_lane_idx, self.minor_indices[lower]));
                     }
                 }
             }
         }
     }
 }
-

nalgebra-sparse/src/proptest.rs

@@ -11,20 +11,22 @@
 mod proptest_patched;
 
 use crate::coo::CooMatrix;
-use proptest::prelude::*;
+use crate::csc::CscMatrix;
-use proptest::collection::{vec, hash_map, btree_set};
-use nalgebra::{Scalar, Dim};
-use std::cmp::min;
-use std::iter::{repeat};
-use proptest::sample::{Index};
 use crate::csr::CsrMatrix;
 use crate::pattern::SparsityPattern;
-use crate::csc::CscMatrix;
 use nalgebra::proptest::DimRange;
+use nalgebra::{Dim, Scalar};
+use proptest::collection::{btree_set, hash_map, vec};
+use proptest::prelude::*;
+use proptest::sample::Index;
+use std::cmp::min;
+use std::iter::repeat;
 
-fn dense_row_major_coord_strategy(nrows: usize, ncols: usize, nnz: usize)
+fn dense_row_major_coord_strategy(
-    -> impl Strategy<Value=Vec<(usize, usize)>>
+    nrows: usize,
-{
+    ncols: usize,
+    nnz: usize,
+) -> impl Strategy<Value = Vec<(usize, usize)>> {
     assert!(nnz <= nrows * ncols);
     let mut booleans = vec![true; nnz];
     booleans.append(&mut vec![false; (nrows * ncols) - nnz]);
@@ -38,8 +40,7 @@ fn dense_row_major_coord_strategy(nrows: usize, ncols: usize, nnz: usize)
     //     // Need to shuffle to make sure they are randomly distributed
     //     .prop_shuffle()
 
-    proptest_patched::Shuffle(Just(booleans))
+    proptest_patched::Shuffle(Just(booleans)).prop_map(move |booleans| {
-        .prop_map(move |booleans| {
         booleans
             .into_iter()
             .enumerate()
@@ -60,11 +61,12 @@ fn dense_row_major_coord_strategy(nrows: usize, ncols: usize, nnz: usize)
 /// A strategy for generating `nnz` triplets.
 ///
 /// This strategy should generally only be used when `nnz` is close to `nrows * ncols`.
-fn dense_triplet_strategy<T>(value_strategy: T,
+fn dense_triplet_strategy<T>(
+    value_strategy: T,
     nrows: usize,
     ncols: usize,
-                             nnz: usize)
+    nnz: usize,
-                             -> impl Strategy<Value=Vec<(usize, usize, T::Value)>>
+) -> impl Strategy<Value = Vec<(usize, usize, T::Value)>>
 where
     T: Strategy + Clone + 'static,
     T::Value: Scalar,
@@ -100,13 +102,12 @@ where
         })
         // Assign values to each coordinate pair in order to generate a list of triplets
         .prop_flat_map(move |coords| {
-            vec![value_strategy.clone(); coords.len()]
+            vec![value_strategy.clone(); coords.len()].prop_map(move |values| {
-                .prop_map(move |values| {
+                coords
-                    coords.clone().into_iter()
+                    .clone()
+                    .into_iter()
                     .zip(values)
-                        .map(|((i, j), v)| {
+                    .map(|((i, j), v)| (i, j, v))
-                            (i, j, v)
-                        })
                     .collect::<Vec<_>>()
             })
         })
@@ -116,25 +117,23 @@ where
 ///
 /// This strategy should generally only be used when `nnz << nrows * ncols`. If `nnz` is too
 /// close to `nrows * ncols` it may fail due to excessive rejected samples.
-fn sparse_triplet_strategy<T>(value_strategy: T,
+fn sparse_triplet_strategy<T>(
+    value_strategy: T,
     nrows: usize,
     ncols: usize,
-                             nnz: usize)
+    nnz: usize,
-                             -> impl Strategy<Value=Vec<(usize, usize, T::Value)>>
+) -> impl Strategy<Value = Vec<(usize, usize, T::Value)>>
-    where
+where
     T: Strategy + Clone + 'static,
     T::Value: Scalar,
 {
     // Have to handle the zero case: proptest doesn't like empty ranges (i.e. 0 .. 0)
-    let row_index_strategy = if nrows > 0 { 0 .. nrows } else { 0 .. 1 };
+    let row_index_strategy = if nrows > 0 { 0..nrows } else { 0..1 };
-    let col_index_strategy = if ncols > 0 { 0 .. ncols } else { 0 .. 1 };
+    let col_index_strategy = if ncols > 0 { 0..ncols } else { 0..1 };
     let coord_strategy = (row_index_strategy, col_index_strategy);
     hash_map(coord_strategy, value_strategy.clone(), nnz)
         .prop_map(|hash_map| {
-            let triplets: Vec<_> = hash_map
+            let triplets: Vec<_> = hash_map.into_iter().map(|((i, j), v)| (i, j, v)).collect();
-                .into_iter()
-                .map(|((i, j), v)| (i, j, v))
-                .collect();
             triplets
         })
         // Although order in the hash map is unspecified, it's not necessarily *random*
@@ -153,18 +152,23 @@ pub fn coo_no_duplicates<T>(
     value_strategy: T,
     rows: impl Into<DimRange>,
     cols: impl Into<DimRange>,
-    max_nonzeros: usize) -> impl Strategy<Value=CooMatrix<T::Value>>
+    max_nonzeros: usize,
+) -> impl Strategy<Value = CooMatrix<T::Value>>
 where
     T: Strategy + Clone + 'static,
     T::Value: Scalar,
 {
-    (rows.into().to_range_inclusive(), cols.into().to_range_inclusive())
+    (
+        rows.into().to_range_inclusive(),
+        cols.into().to_range_inclusive(),
+    )
         .prop_flat_map(move |(nrows, ncols)| {
             let max_nonzeros = min(max_nonzeros, nrows * ncols);
-            let size_range = 0 ..= max_nonzeros;
+            let size_range = 0..=max_nonzeros;
             let value_strategy = value_strategy.clone();
 
-            size_range.prop_flat_map(move |nnz| {
+            size_range
+                .prop_flat_map(move |nnz| {
                     let value_strategy = value_strategy.clone();
                     if nnz as f64 > 0.10 * (nrows as f64) * (ncols as f64) {
                         // If the number of nnz is sufficiently dense, then use the dense
@@ -202,17 +206,18 @@ pub fn coo_with_duplicates<T>(
     rows: impl Into<DimRange>,
     cols: impl Into<DimRange>,
     max_nonzeros: usize,
-                 max_duplicates: usize)
+    max_duplicates: usize,
-    -> impl Strategy<Value=CooMatrix<T::Value>>
+) -> impl Strategy<Value = CooMatrix<T::Value>>
 where
     T: Strategy + Clone + 'static,
     T::Value: Scalar,
 {
     let coo_strategy = coo_no_duplicates(value_strategy.clone(), rows, cols, max_nonzeros);
-    let duplicate_strategy = vec((any::<Index>(), value_strategy.clone()), 0 ..= max_duplicates);
+    let duplicate_strategy = vec((any::<Index>(), value_strategy.clone()), 0..=max_duplicates);
     (coo_strategy, duplicate_strategy)
         .prop_flat_map(|(coo, duplicates)| {
-            let mut triplets: Vec<(usize, usize, T::Value)> = coo.triplet_iter()
+            let mut triplets: Vec<(usize, usize, T::Value)> = coo
+                .triplet_iter()
                 .map(|(i, j, v)| (i, j, v.clone()))
                 .collect();
             if !triplets.is_empty() {
@@ -238,9 +243,13 @@ where
         })
 }
 
-fn sparsity_pattern_from_row_major_coords<I>(nmajor: usize, nminor: usize, coords: I) -> SparsityPattern
+fn sparsity_pattern_from_row_major_coords<I>(
+    nmajor: usize,
+    nminor: usize,
+    coords: I,
+) -> SparsityPattern
 where
-    I: Iterator<Item=(usize, usize)> + ExactSizeIterator,
+    I: Iterator<Item = (usize, usize)> + ExactSizeIterator,
 {
     let mut minors = Vec::with_capacity(coords.len());
     let mut offsets = Vec::with_capacity(nmajor + 1);
@@ -248,8 +257,11 @@ where
     offsets.push(0);
     for (idx, (i, j)) in coords.enumerate() {
         assert!(i >= current_major);
-        assert!(i < nmajor && j < nminor, "Generated coords are out of bounds");
+        assert!(
-        while current_major < i{
+            i < nmajor && j < nminor,
+            "Generated coords are out of bounds"
+        );
+        while current_major < i {
             offsets.push(idx);
             current_major += 1;
         }
@@ -264,10 +276,7 @@ where
     assert_eq!(offsets.first().unwrap(), &0);
     assert_eq!(offsets.len(), nmajor + 1);
 
-    SparsityPattern::try_from_offsets_and_indices(nmajor,
+    SparsityPattern::try_from_offsets_and_indices(nmajor, nminor, offsets, minors)
-                                                  nminor,
-                                                  offsets,
-                                                  minors)
         .expect("Internal error: Generated sparsity pattern is invalid")
 }
 
@@ -275,14 +284,17 @@ where
 pub fn sparsity_pattern(
     major_lanes: impl Into<DimRange>,
     minor_lanes: impl Into<DimRange>,
-    max_nonzeros: usize)
+    max_nonzeros: usize,
--> impl Strategy<Value=SparsityPattern>
+) -> impl Strategy<Value = SparsityPattern> {
-{
+    (
-    (major_lanes.into().to_range_inclusive(), minor_lanes.into().to_range_inclusive())
+        major_lanes.into().to_range_inclusive(),
+        minor_lanes.into().to_range_inclusive(),
+    )
         .prop_flat_map(move |(nmajor, nminor)| {
             let max_nonzeros = min(nmajor * nminor, max_nonzeros);
-            (Just(nmajor), Just(nminor), 0 ..= max_nonzeros)
+            (Just(nmajor), Just(nminor), 0..=max_nonzeros)
-        }).prop_flat_map(move |(nmajor, nminor, nnz)| {
+        })
+        .prop_flat_map(move |(nmajor, nminor, nnz)| {
             if 10 * nnz < nmajor * nminor {
                 // If nnz is small compared to a dense matrix, then use a sparse sampling strategy
                 btree_set((0..nmajor, 0..nminor), nnz)
@@ -297,24 +309,30 @@ pub fn sparsity_pattern(
                     .prop_map(move |coords| {
                         let coords = coords.into_iter();
                         sparsity_pattern_from_row_major_coords(nmajor, nminor, coords)
-                    }).boxed()
+                    })
+                    .boxed()
             }
         })
 }
 
 /// A strategy for generating CSR matrices.
-pub fn csr<T>(value_strategy: T,
+pub fn csr<T>(
+    value_strategy: T,
     rows: impl Into<DimRange>,
     cols: impl Into<DimRange>,
-              max_nonzeros: usize)
+    max_nonzeros: usize,
-    -> impl Strategy<Value=CsrMatrix<T::Value>>
+) -> impl Strategy<Value = CsrMatrix<T::Value>>
 where
     T: Strategy + Clone + 'static,
     T::Value: Scalar,
 {
     let rows = rows.into();
     let cols = cols.into();
-    sparsity_pattern(rows.lower_bound().value() ..= rows.upper_bound().value(), cols.lower_bound().value() ..= cols.upper_bound().value(), max_nonzeros)
+    sparsity_pattern(
+        rows.lower_bound().value()..=rows.upper_bound().value(),
+        cols.lower_bound().value()..=cols.upper_bound().value(),
+        max_nonzeros,
+    )
     .prop_flat_map(move |pattern| {
         let nnz = pattern.nnz();
         let values = vec![value_strategy.clone(); nnz];
@@ -327,18 +345,23 @@ where
 }
 
 /// A strategy for generating CSC matrices.
-pub fn csc<T>(value_strategy: T,
+pub fn csc<T>(
+    value_strategy: T,
     rows: impl Into<DimRange>,
     cols: impl Into<DimRange>,
-              max_nonzeros: usize)
+    max_nonzeros: usize,
-              -> impl Strategy<Value=CscMatrix<T::Value>>
+) -> impl Strategy<Value = CscMatrix<T::Value>>
-    where
+where
     T: Strategy + Clone + 'static,
     T::Value: Scalar,
 {
     let rows = rows.into();
     let cols = cols.into();
-    sparsity_pattern(cols.lower_bound().value() ..= cols.upper_bound().value(), rows.lower_bound().value() ..= rows.upper_bound().value(), max_nonzeros)
+    sparsity_pattern(
+        cols.lower_bound().value()..=cols.upper_bound().value(),
+        rows.lower_bound().value()..=rows.upper_bound().value(),
+        max_nonzeros,
+    )
     .prop_flat_map(move |pattern| {
         let nnz = pattern.nnz();
         let values = vec![value_strategy.clone(); nnz];

nalgebra-sparse/src/proptest/proptest_patched.rs

@@ -22,18 +22,18 @@
 
 */
 
-use proptest::strategy::{Strategy, Shuffleable, NewTree, ValueTree};
-use proptest::test_runner::{TestRunner, TestRng};
-use std::cell::Cell;
 use proptest::num;
 use proptest::prelude::Rng;
+use proptest::strategy::{NewTree, Shuffleable, Strategy, ValueTree};
+use proptest::test_runner::{TestRng, TestRunner};
+use std::cell::Cell;
 
 #[derive(Clone, Debug)]
 #[must_use = "strategies do nothing unless used"]
 pub struct Shuffle<S>(pub(super) S);
 
 impl<S: Strategy> Strategy for Shuffle<S>
-    where
+where
     S::Value: Shuffleable,
 {
     type Tree = ShuffleValueTree<S::Tree>;
@@ -60,7 +60,7 @@ pub struct ShuffleValueTree<V> {
 }
 
 impl<V: ValueTree> ShuffleValueTree<V>
-    where
+where
     V::Value: Shuffleable,
 {
     fn init_dist(&self, dflt: usize) -> usize {
@@ -79,7 +79,7 @@ impl<V: ValueTree> ShuffleValueTree<V>
 }
 
 impl<V: ValueTree> ValueTree for ShuffleValueTree<V>
-    where
+where
     V::Value: Shuffleable,
 {
     type Value = V::Value;

nalgebra-sparse/tests/common/mod.rs

@@ -1,15 +1,15 @@
-use proptest::strategy::Strategy;
-use nalgebra_sparse::csr::CsrMatrix;
-use nalgebra_sparse::proptest::{csr, csc};
 use nalgebra_sparse::csc::CscMatrix;
-use std::ops::RangeInclusive;
+use nalgebra_sparse::csr::CsrMatrix;
-use std::convert::{TryFrom};
+use nalgebra_sparse::proptest::{csc, csr};
+use proptest::strategy::Strategy;
+use std::convert::TryFrom;
 use std::fmt::Debug;
+use std::ops::RangeInclusive;
 
 #[macro_export]
 macro_rules! assert_panics {
     ($e:expr) => {{
-        use std::panic::{catch_unwind};
+        use std::panic::catch_unwind;
         use std::stringify;
         let expr_string = stringify!($e);
 
@@ -22,37 +22,56 @@ macro_rules! assert_panics {
 
         let result = catch_unwind(|| $e);
         if result.is_ok() {
-            panic!("assert_panics!({}) failed: the expression did not panic.", expr_string);
+            panic!(
+                "assert_panics!({}) failed: the expression did not panic.",
+                expr_string
+            );
         }
     }};
 }
 
 pub const PROPTEST_MATRIX_DIM: RangeInclusive<usize> = 0..=6;
 pub const PROPTEST_MAX_NNZ: usize = 40;
-pub const PROPTEST_I32_VALUE_STRATEGY: RangeInclusive<i32> = -5 ..= 5;
+pub const PROPTEST_I32_VALUE_STRATEGY: RangeInclusive<i32> = -5..=5;
 
 pub fn value_strategy<T>() -> RangeInclusive<T>
 where
     T: TryFrom<i32>,
-    T::Error: Debug
+    T::Error: Debug,
 {
-    let (start, end) = (PROPTEST_I32_VALUE_STRATEGY.start(), PROPTEST_I32_VALUE_STRATEGY.end());
+    let (start, end) = (
-    T::try_from(*start).unwrap() ..= T::try_from(*end).unwrap()
+        PROPTEST_I32_VALUE_STRATEGY.start(),
+        PROPTEST_I32_VALUE_STRATEGY.end(),
+    );
+    T::try_from(*start).unwrap()..=T::try_from(*end).unwrap()
 }
 
-pub fn non_zero_i32_value_strategy() -> impl Strategy<Value=i32> {
+pub fn non_zero_i32_value_strategy() -> impl Strategy<Value = i32> {
-    let (start, end) = (PROPTEST_I32_VALUE_STRATEGY.start(), PROPTEST_I32_VALUE_STRATEGY.end());
+    let (start, end) = (
+        PROPTEST_I32_VALUE_STRATEGY.start(),
+        PROPTEST_I32_VALUE_STRATEGY.end(),
+    );
     assert!(start < &0);
     assert!(end > &0);
     // Note: we don't use RangeInclusive for the second range, because then we'd have different
     // types, which would require boxing
-    (*start .. 0).prop_union(1 .. *end + 1)
+    (*start..0).prop_union(1..*end + 1)
 }
 
-pub fn csr_strategy() -> impl Strategy<Value=CsrMatrix<i32>> {
+pub fn csr_strategy() -> impl Strategy<Value = CsrMatrix<i32>> {
-    csr(PROPTEST_I32_VALUE_STRATEGY, PROPTEST_MATRIX_DIM, PROPTEST_MATRIX_DIM, PROPTEST_MAX_NNZ)
+    csr(
+        PROPTEST_I32_VALUE_STRATEGY,
+        PROPTEST_MATRIX_DIM,
+        PROPTEST_MATRIX_DIM,
+        PROPTEST_MAX_NNZ,
+    )
 }
 
-pub fn csc_strategy() -> impl Strategy<Value=CscMatrix<i32>> {
+pub fn csc_strategy() -> impl Strategy<Value = CscMatrix<i32>> {
-    csc(PROPTEST_I32_VALUE_STRATEGY, PROPTEST_MATRIX_DIM, PROPTEST_MATRIX_DIM, PROPTEST_MAX_NNZ)
+    csc(
+        PROPTEST_I32_VALUE_STRATEGY,
+        PROPTEST_MATRIX_DIM,
+        PROPTEST_MATRIX_DIM,
+        PROPTEST_MAX_NNZ,
+    )
 }

nalgebra-sparse/tests/unit_tests/convert_serial.rs

@@ -1,17 +1,16 @@
-use nalgebra_sparse::coo::CooMatrix;
-use nalgebra_sparse::convert::serial::{convert_coo_dense, convert_coo_csr,
-                                       convert_dense_coo, convert_csr_dense,
-                                       convert_csr_coo, convert_dense_csr,
-                                       convert_csc_coo, convert_coo_csc,
-                                       convert_csc_dense, convert_dense_csc,
-                                       convert_csr_csc, convert_csc_csr};
-use nalgebra_sparse::proptest::{coo_with_duplicates, coo_no_duplicates, csr, csc};
-use nalgebra::proptest::matrix;
-use proptest::prelude::*;
-use nalgebra::DMatrix;
-use nalgebra_sparse::csr::CsrMatrix;
-use nalgebra_sparse::csc::CscMatrix;
 use crate::common::csc_strategy;
+use nalgebra::proptest::matrix;
+use nalgebra::DMatrix;
+use nalgebra_sparse::convert::serial::{
+    convert_coo_csc, convert_coo_csr, convert_coo_dense, convert_csc_coo, convert_csc_csr,
+    convert_csc_dense, convert_csr_coo, convert_csr_csc, convert_csr_dense, convert_dense_coo,
+    convert_dense_csc, convert_dense_csr,
+};
+use nalgebra_sparse::coo::CooMatrix;
+use nalgebra_sparse::csc::CscMatrix;
+use nalgebra_sparse::csr::CsrMatrix;
+use nalgebra_sparse::proptest::{coo_no_duplicates, coo_with_duplicates, csc, csr};
+use proptest::prelude::*;
 
 #[test]
 fn test_convert_dense_coo() {
@@ -41,15 +40,16 @@ fn test_convert_dense_coo() {
         // Here we implicitly test that the coo matrix is indeed constructed from column-major
         // iteration of the dense matrix.
         let dense = DMatrix::from_row_slice(2, 3, entries);
-        let coo_no_dup = CooMatrix::try_from_triplets(2, 3,
+        let coo_no_dup =
-                                                      vec![0, 1, 0],
+            CooMatrix::try_from_triplets(2, 3, vec![0, 1, 0], vec![0, 1, 2], vec![1, 5, 3])
-                                                      vec![0, 1, 2],
-                                                      vec![1, 5, 3])
                 .unwrap();
-        let coo_dup = CooMatrix::try_from_triplets(2, 3,
+        let coo_dup = CooMatrix::try_from_triplets(
+            2,
+            3,
             vec![0, 1, 0, 1],
             vec![0, 1, 2, 1],
-                                                   vec![1, -2, 3, 7])
+            vec![1, -2, 3, 7],
+        )
         .unwrap();
 
         assert_eq!(CooMatrix::from(&dense), coo_no_dup);
@@ -76,8 +76,9 @@ fn test_convert_coo_csr() {
             4,
             vec![0, 1, 2, 5],
             vec![1, 3, 0, 2, 3],
-            vec![2, 4, 1, 1, 2]
+            vec![2, 4, 1, 1, 2],
-        ).unwrap();
+        )
+        .unwrap();
 
         assert_eq!(convert_coo_csr(&coo), expected_csr);
     }
@@ -101,8 +102,9 @@ fn test_convert_coo_csr() {
             4,
             vec![0, 1, 2, 5],
             vec![1, 3, 0, 2, 3],
-            vec![5, 4, 1, 1, 4]
+            vec![5, 4, 1, 1, 4],
-        ).unwrap();
+        )
+        .unwrap();
 
         assert_eq!(convert_coo_csr(&coo), expected_csr);
     }
@@ -115,16 +117,18 @@ fn test_convert_csr_coo() {
         4,
         vec![0, 1, 2, 5],
         vec![1, 3, 0, 2, 3],
-        vec![5, 4, 1, 1, 4]
+        vec![5, 4, 1, 1, 4],
-    ).unwrap();
+    )
+    .unwrap();
 
     let expected_coo = CooMatrix::try_from_triplets(
         3,
         4,
         vec![0, 1, 2, 2, 2],
         vec![1, 3, 0, 2, 3],
-        vec![5, 4, 1, 1, 4]
+        vec![5, 4, 1, 1, 4],
-    ).unwrap();
+    )
+    .unwrap();
 
     assert_eq!(convert_csr_coo(&csr), expected_coo);
 }
@@ -148,8 +152,9 @@ fn test_convert_coo_csc() {
             4,
             vec![0, 1, 2, 3, 5],
             vec![2, 0, 2, 1, 2],
-            vec![1, 2, 1, 4, 2]
+            vec![1, 2, 1, 4, 2],
-        ).unwrap();
+        )
+        .unwrap();
 
         assert_eq!(convert_coo_csc(&coo), expected_csc);
     }
@@ -173,8 +178,9 @@ fn test_convert_coo_csc() {
             4,
             vec![0, 1, 2, 3, 5],
             vec![2, 0, 2, 1, 2],
-            vec![1, 5, 1, 4, 4]
+            vec![1, 5, 1, 4, 4],
-        ).unwrap();
+        )
+        .unwrap();
 
         assert_eq!(convert_coo_csc(&coo), expected_csc);
     }
@@ -187,16 +193,18 @@ fn test_convert_csc_coo() {
         4,
         vec![0, 1, 2, 3, 5],
         vec![2, 0, 2, 1, 2],
-        vec![1, 2, 1, 4, 2]
+        vec![1, 2, 1, 4, 2],
-    ).unwrap();
+    )
+    .unwrap();
 
     let expected_coo = CooMatrix::try_from_triplets(
         3,
         4,
         vec![2, 0, 2, 1, 2],
         vec![0, 1, 2, 3, 3],
-        vec![1, 2, 1, 4, 2]
+        vec![1, 2, 1, 4, 2],
-    ).unwrap();
+    )
+    .unwrap();
 
     assert_eq!(convert_csc_coo(&csc), expected_coo);
 }
@@ -209,7 +217,8 @@ fn test_convert_csr_csc_bidirectional() {
         vec![0, 3, 4, 6],
         vec![1, 2, 3, 0, 1, 3],
         vec![5, 3, 2, 2, 1, 4],
-    ).unwrap();
+    )
+    .unwrap();
 
     let csc = CscMatrix::try_from_csc_data(
         3,
@@ -217,7 +226,8 @@ fn test_convert_csr_csc_bidirectional() {
         vec![0, 1, 3, 4, 6],
         vec![1, 0, 2, 0, 0, 2],
         vec![2, 5, 1, 3, 2, 4],
-    ).unwrap();
+    )
+    .unwrap();
 
     assert_eq!(convert_csr_csc(&csr), csc);
     assert_eq!(convert_csc_csr(&csc), csr);
@@ -231,7 +241,8 @@ fn test_convert_csr_dense_bidirectional() {
         vec![0, 3, 4, 6],
         vec![1, 2, 3, 0, 1, 3],
         vec![5, 3, 2, 2, 1, 4],
-    ).unwrap();
+    )
+    .unwrap();
 
     #[rustfmt::skip]
     let dense = DMatrix::from_row_slice(3, 4, &[
@@ -252,7 +263,8 @@ fn test_convert_csc_dense_bidirectional() {
         vec![0, 1, 3, 4, 6],
         vec![1, 0, 2, 0, 0, 2],
         vec![2, 5, 1, 3, 2, 4],
-    ).unwrap();
+    )
+    .unwrap();
 
     #[rustfmt::skip]
     let dense = DMatrix::from_row_slice(3, 4, &[
@@ -265,29 +277,29 @@ fn test_convert_csc_dense_bidirectional() {
     assert_eq!(convert_dense_csc(&dense), csc);
 }
 
-fn coo_strategy() -> impl Strategy<Value=CooMatrix<i32>> {
+fn coo_strategy() -> impl Strategy<Value = CooMatrix<i32>> {
-    coo_with_duplicates(-5 ..= 5, 0..=6usize, 0..=6usize, 40, 2)
+    coo_with_duplicates(-5..=5, 0..=6usize, 0..=6usize, 40, 2)
 }
 
-fn coo_no_duplicates_strategy() -> impl Strategy<Value=CooMatrix<i32>> {
+fn coo_no_duplicates_strategy() -> impl Strategy<Value = CooMatrix<i32>> {
-    coo_no_duplicates(-5 ..= 5, 0..=6usize, 0..=6usize, 40)
+    coo_no_duplicates(-5..=5, 0..=6usize, 0..=6usize, 40)
 }
 
-fn csr_strategy() -> impl Strategy<Value=CsrMatrix<i32>> {
+fn csr_strategy() -> impl Strategy<Value = CsrMatrix<i32>> {
-    csr(-5 ..= 5, 0..=6usize, 0..=6usize, 40)
+    csr(-5..=5, 0..=6usize, 0..=6usize, 40)
 }
 
 /// Avoid generating explicit zero values so that it is possible to reason about sparsity patterns
-fn non_zero_csr_strategy() -> impl Strategy<Value=CsrMatrix<i32>> {
+fn non_zero_csr_strategy() -> impl Strategy<Value = CsrMatrix<i32>> {
-    csr(1 ..= 5, 0..=6usize, 0..=6usize, 40)
+    csr(1..=5, 0..=6usize, 0..=6usize, 40)
 }
 
 /// Avoid generating explicit zero values so that it is possible to reason about sparsity patterns
-fn non_zero_csc_strategy() -> impl Strategy<Value=CscMatrix<i32>> {
+fn non_zero_csc_strategy() -> impl Strategy<Value = CscMatrix<i32>> {
-    csc(1 ..= 5, 0..=6usize, 0..=6usize, 40)
+    csc(1..=5, 0..=6usize, 0..=6usize, 40)
 }
 
-fn dense_strategy() -> impl Strategy<Value=DMatrix<i32>> {
+fn dense_strategy() -> impl Strategy<Value = DMatrix<i32>> {
     matrix(-5..=5, 0..=6, 0..=6)
 }
 

nalgebra-sparse/tests/unit_tests/coo.rs

@@ -1,7 +1,7 @@
-use nalgebra_sparse::{SparseFormatErrorKind};
-use nalgebra_sparse::coo::CooMatrix;
-use nalgebra::DMatrix;
 use crate::assert_panics;
+use nalgebra::DMatrix;
+use nalgebra_sparse::coo::CooMatrix;
+use nalgebra_sparse::SparseFormatErrorKind;
 
 #[test]
 fn coo_construction_for_valid_data() {
@@ -10,8 +10,8 @@ fn coo_construction_for_valid_data() {
 
     {
         // Zero matrix
-        let coo = CooMatrix::<i32>::try_from_triplets(3, 2, Vec::new(), Vec::new(), Vec::new())
+        let coo =
-            .unwrap();
+            CooMatrix::<i32>::try_from_triplets(3, 2, Vec::new(), Vec::new(), Vec::new()).unwrap();
         assert_eq!(coo.nrows(), 3);
         assert_eq!(coo.ncols(), 2);
         assert!(coo.triplet_iter().next().is_none());
@@ -27,8 +27,8 @@ fn coo_construction_for_valid_data() {
         let i = vec![0, 1, 0, 0, 2];
         let j = vec![0, 2, 1, 3, 3];
         let v = vec![2, 3, 7, 3, 1];
-        let coo = CooMatrix::<i32>::try_from_triplets(3, 5, i.clone(), j.clone(), v.clone())
+        let coo =
-            .unwrap();
+            CooMatrix::<i32>::try_from_triplets(3, 5, i.clone(), j.clone(), v.clone()).unwrap();
         assert_eq!(coo.nrows(), 3);
         assert_eq!(coo.ncols(), 5);
 
@@ -59,8 +59,8 @@ fn coo_construction_for_valid_data() {
         let i = vec![0, 1, 0, 0, 0, 0, 2, 1];
         let j = vec![0, 2, 0, 1, 0, 3, 3, 2];
         let v = vec![2, 3, 4, 7, 1, 3, 1, 5];
-        let coo = CooMatrix::<i32>::try_from_triplets(3, 5, i.clone(), j.clone(), v.clone())
+        let coo =
-            .unwrap();
+            CooMatrix::<i32>::try_from_triplets(3, 5, i.clone(), j.clone(), v.clone()).unwrap();
         assert_eq!(coo.nrows(), 3);
         assert_eq!(coo.ncols(), 5);
 
@@ -92,25 +92,37 @@ fn coo_try_from_triplets_reports_out_of_bounds_indices() {
     {
         // 0x0 matrix
         let result = CooMatrix::<i32>::try_from_triplets(0, 0, vec![0], vec![0], vec![2]);
-        assert!(matches!(result.unwrap_err().kind(), SparseFormatErrorKind::IndexOutOfBounds));
+        assert!(matches!(
+            result.unwrap_err().kind(),
+            SparseFormatErrorKind::IndexOutOfBounds
+        ));
     }
 
     {
         // 1x1 matrix, row out of bounds
         let result = CooMatrix::<i32>::try_from_triplets(1, 1, vec![1], vec![0], vec![2]);
-        assert!(matches!(result.unwrap_err().kind(), SparseFormatErrorKind::IndexOutOfBounds));
+        assert!(matches!(
+            result.unwrap_err().kind(),
+            SparseFormatErrorKind::IndexOutOfBounds
+        ));
     }
 
     {
         // 1x1 matrix, col out of bounds
         let result = CooMatrix::<i32>::try_from_triplets(1, 1, vec![0], vec![1], vec![2]);
-        assert!(matches!(result.unwrap_err().kind(), SparseFormatErrorKind::IndexOutOfBounds));
+        assert!(matches!(
+            result.unwrap_err().kind(),
+            SparseFormatErrorKind::IndexOutOfBounds
+        ));
     }
 
     {
         // 1x1 matrix, row and col out of bounds
         let result = CooMatrix::<i32>::try_from_triplets(1, 1, vec![1], vec![1], vec![2]);
-        assert!(matches!(result.unwrap_err().kind(), SparseFormatErrorKind::IndexOutOfBounds));
+        assert!(matches!(
+            result.unwrap_err().kind(),
+            SparseFormatErrorKind::IndexOutOfBounds
+        ));
     }
 
     {
@@ -119,7 +131,10 @@ fn coo_try_from_triplets_reports_out_of_bounds_indices() {
         let j = vec![0, 2, 1, 3, 3];
         let v = vec![2, 3, 7, 3, 1];
         let result = CooMatrix::<i32>::try_from_triplets(3, 5, i, j, v);
-        assert!(matches!(result.unwrap_err().kind(), SparseFormatErrorKind::IndexOutOfBounds));
+        assert!(matches!(
+            result.unwrap_err().kind(),
+            SparseFormatErrorKind::IndexOutOfBounds
+        ));
     }
 
     {
@@ -128,7 +143,10 @@ fn coo_try_from_triplets_reports_out_of_bounds_indices() {
         let j = vec![0, 2, 1, 5, 3];
         let v = vec![2, 3, 7, 3, 1];
         let result = CooMatrix::<i32>::try_from_triplets(3, 5, i, j, v);
-        assert!(matches!(result.unwrap_err().kind(), SparseFormatErrorKind::IndexOutOfBounds));
+        assert!(matches!(
+            result.unwrap_err().kind(),
+            SparseFormatErrorKind::IndexOutOfBounds
+        ));
     }
 }
 
@@ -137,16 +155,55 @@ fn coo_try_from_triplets_panics_on_mismatched_vectors() {
     // Check that try_from_triplets panics when the triplet vectors have different lengths
     macro_rules! assert_errs {
         ($result:expr) => {
-            assert!(matches!($result.unwrap_err().kind(), SparseFormatErrorKind::InvalidStructure))
+            assert!(matches!(
-        }
+                $result.unwrap_err().kind(),
+                SparseFormatErrorKind::InvalidStructure
+            ))
+        };
     }
 
-    assert_errs!(CooMatrix::<i32>::try_from_triplets(3, 5, vec![1, 2], vec![0], vec![0]));
+    assert_errs!(CooMatrix::<i32>::try_from_triplets(
-    assert_errs!(CooMatrix::<i32>::try_from_triplets(3, 5, vec![1], vec![0, 0], vec![0]));
+        3,
-    assert_errs!(CooMatrix::<i32>::try_from_triplets(3, 5, vec![1], vec![0], vec![0, 1]));
+        5,
-    assert_errs!(CooMatrix::<i32>::try_from_triplets(3, 5, vec![1, 2], vec![0, 1], vec![0]));
+        vec![1, 2],
-    assert_errs!(CooMatrix::<i32>::try_from_triplets(3, 5, vec![1], vec![0, 1], vec![0, 1]));
+        vec![0],
-    assert_errs!(CooMatrix::<i32>::try_from_triplets(3, 5, vec![1, 1], vec![0], vec![0, 1]));
+        vec![0]
+    ));
+    assert_errs!(CooMatrix::<i32>::try_from_triplets(
+        3,
+        5,
+        vec![1],
+        vec![0, 0],
+        vec![0]
+    ));
+    assert_errs!(CooMatrix::<i32>::try_from_triplets(
+        3,
+        5,
+        vec![1],
+        vec![0],
+        vec![0, 1]
+    ));
+    assert_errs!(CooMatrix::<i32>::try_from_triplets(
+        3,
+        5,
+        vec![1, 2],
+        vec![0, 1],
+        vec![0]
+    ));
+    assert_errs!(CooMatrix::<i32>::try_from_triplets(
+        3,
+        5,
+        vec![1],
+        vec![0, 1],
+        vec![0, 1]
+    ));
+    assert_errs!(CooMatrix::<i32>::try_from_triplets(
+        3,
+        5,
+        vec![1, 1],
+        vec![0],
+        vec![0, 1]
+    ));
 }
 
 #[test]
@@ -157,10 +214,16 @@ fn coo_push_valid_entries() {
     assert_eq!(coo.triplet_iter().collect::<Vec<_>>(), vec![(0, 0, &1)]);
 
     coo.push(0, 0, 2);
-    assert_eq!(coo.triplet_iter().collect::<Vec<_>>(), vec![(0, 0, &1), (0, 0, &2)]);
+    assert_eq!(
+        coo.triplet_iter().collect::<Vec<_>>(),
+        vec![(0, 0, &1), (0, 0, &2)]
+    );
 
     coo.push(2, 2, 3);
-    assert_eq!(coo.triplet_iter().collect::<Vec<_>>(), vec![(0, 0, &1), (0, 0, &2), (2, 2, &3)]);
+    assert_eq!(
+        coo.triplet_iter().collect::<Vec<_>>(),
+        vec![(0, 0, &1), (0, 0, &2), (2, 2, &3)]
+    );
 }
 
 #[test]

nalgebra-sparse/tests/unit_tests/csc.rs

@@ -1,6 +1,6 @@
+use nalgebra::DMatrix;
 use nalgebra_sparse::csc::CscMatrix;
 use nalgebra_sparse::SparseFormatErrorKind;
-use nalgebra::DMatrix;
 
 use proptest::prelude::*;
 use proptest::sample::subsequence;
@@ -42,7 +42,10 @@ fn csc_matrix_valid_data() {
         assert_eq!(matrix.col_mut(0).row_indices(), &[]);
         assert_eq!(matrix.col_mut(0).values(), &[]);
         assert_eq!(matrix.col_mut(0).values_mut(), &[]);
-        assert_eq!(matrix.col_mut(0).rows_and_values_mut(), ([].as_ref(), [].as_mut()));
+        assert_eq!(
+            matrix.col_mut(0).rows_and_values_mut(),
+            ([].as_ref(), [].as_mut())
+        );
 
         assert_eq!(matrix.col(1).nrows(), 2);
         assert_eq!(matrix.col(1).nnz(), 0);
@@ -53,7 +56,10 @@ fn csc_matrix_valid_data() {
         assert_eq!(matrix.col_mut(1).row_indices(), &[]);
         assert_eq!(matrix.col_mut(1).values(), &[]);
         assert_eq!(matrix.col_mut(1).values_mut(), &[]);
-        assert_eq!(matrix.col_mut(1).rows_and_values_mut(), ([].as_ref(), [].as_mut()));
+        assert_eq!(
+            matrix.col_mut(1).rows_and_values_mut(),
+            ([].as_ref(), [].as_mut())
+        );
 
         assert_eq!(matrix.col(2).nrows(), 2);
         assert_eq!(matrix.col(2).nnz(), 0);
@@ -64,7 +70,10 @@ fn csc_matrix_valid_data() {
         assert_eq!(matrix.col_mut(2).row_indices(), &[]);
         assert_eq!(matrix.col_mut(2).values(), &[]);
         assert_eq!(matrix.col_mut(2).values_mut(), &[]);
-        assert_eq!(matrix.col_mut(2).rows_and_values_mut(), ([].as_ref(), [].as_mut()));
+        assert_eq!(
+            matrix.col_mut(2).rows_and_values_mut(),
+            ([].as_ref(), [].as_mut())
+        );
 
         assert!(matrix.get_col(3).is_none());
         assert!(matrix.get_col_mut(3).is_none());
@@ -81,11 +90,9 @@ fn csc_matrix_valid_data() {
         let offsets = vec![0, 2, 2, 5];
         let indices = vec![0, 5, 1, 2, 3];
         let values = vec![0, 1, 2, 3, 4];
-        let mut matrix = CscMatrix::try_from_csc_data(6,
+        let mut matrix =
-                                                      3,
+            CscMatrix::try_from_csc_data(6, 3, offsets.clone(), indices.clone(), values.clone())
-                                                      offsets.clone(),
+                .unwrap();
-                                                      indices.clone(),
-                                                      values.clone()).unwrap();
 
         assert_eq!(matrix.nrows(), 6);
         assert_eq!(matrix.ncols(), 3);
@@ -95,10 +102,20 @@ fn csc_matrix_valid_data() {
         assert_eq!(matrix.values(), &[0, 1, 2, 3, 4]);
 
         let expected_triplets = vec![(0, 0, 0), (5, 0, 1), (1, 2, 2), (2, 2, 3), (3, 2, 4)];
-        assert_eq!(matrix.triplet_iter().map(|(i, j, v)| (i, j, *v)).collect::<Vec<_>>(),
+        assert_eq!(
-                   expected_triplets);
+            matrix
-        assert_eq!(matrix.triplet_iter_mut().map(|(i, j, v)| (i, j, *v)).collect::<Vec<_>>(),
+                .triplet_iter()
-                   expected_triplets);
+                .map(|(i, j, v)| (i, j, *v))
+                .collect::<Vec<_>>(),
+            expected_triplets
+        );
+        assert_eq!(
+            matrix
+                .triplet_iter_mut()
+                .map(|(i, j, v)| (i, j, *v))
+                .collect::<Vec<_>>(),
+            expected_triplets
+        );
 
         assert_eq!(matrix.col(0).nrows(), 6);
         assert_eq!(matrix.col(0).nnz(), 2);
@@ -109,7 +126,10 @@ fn csc_matrix_valid_data() {
         assert_eq!(matrix.col_mut(0).row_indices(), &[0, 5]);
         assert_eq!(matrix.col_mut(0).values(), &[0, 1]);
         assert_eq!(matrix.col_mut(0).values_mut(), &[0, 1]);
-        assert_eq!(matrix.col_mut(0).rows_and_values_mut(), ([0, 5].as_ref(), [0, 1].as_mut()));
+        assert_eq!(
+            matrix.col_mut(0).rows_and_values_mut(),
+            ([0, 5].as_ref(), [0, 1].as_mut())
+        );
 
         assert_eq!(matrix.col(1).nrows(), 6);
         assert_eq!(matrix.col(1).nnz(), 0);
@@ -120,7 +140,10 @@ fn csc_matrix_valid_data() {
         assert_eq!(matrix.col_mut(1).row_indices(), &[]);
         assert_eq!(matrix.col_mut(1).values(), &[]);
         assert_eq!(matrix.col_mut(1).values_mut(), &[]);
-        assert_eq!(matrix.col_mut(1).rows_and_values_mut(), ([].as_ref(), [].as_mut()));
+        assert_eq!(
+            matrix.col_mut(1).rows_and_values_mut(),
+            ([].as_ref(), [].as_mut())
+        );
 
         assert_eq!(matrix.col(2).nrows(), 6);
         assert_eq!(matrix.col(2).nnz(), 3);
@@ -131,7 +154,10 @@ fn csc_matrix_valid_data() {
         assert_eq!(matrix.col_mut(2).row_indices(), &[1, 2, 3]);
         assert_eq!(matrix.col_mut(2).values(), &[2, 3, 4]);
         assert_eq!(matrix.col_mut(2).values_mut(), &[2, 3, 4]);
-        assert_eq!(matrix.col_mut(2).rows_and_values_mut(), ([1, 2, 3].as_ref(), [2, 3, 4].as_mut()));
+        assert_eq!(
+            matrix.col_mut(2).rows_and_values_mut(),
+            ([1, 2, 3].as_ref(), [2, 3, 4].as_mut())
+        );
 
         assert!(matrix.get_col(3).is_none());
         assert!(matrix.get_col_mut(3).is_none());
@@ -146,11 +172,13 @@ fn csc_matrix_valid_data() {
 
 #[test]
 fn csc_matrix_try_from_invalid_csc_data() {
-
     {
         // Empty offset array (invalid length)
         let matrix = CscMatrix::try_from_csc_data(0, 0, Vec::new(), Vec::new(), Vec::<u32>::new());
-        assert_eq!(matrix.unwrap_err().kind(), &SparseFormatErrorKind::InvalidStructure);
+        assert_eq!(
+            matrix.unwrap_err().kind(),
+            &SparseFormatErrorKind::InvalidStructure
+        );
     }
 
     {
@@ -160,7 +188,10 @@ fn csc_matrix_try_from_invalid_csc_data() {
         let values = vec![0, 1, 2, 3, 4];
 
         let matrix = CscMatrix::try_from_csc_data(6, 3, offsets, indices, values);
-        assert_eq!(matrix.unwrap_err().kind(), &SparseFormatErrorKind::InvalidStructure);
+        assert_eq!(
+            matrix.unwrap_err().kind(),
+            &SparseFormatErrorKind::InvalidStructure
+        );
     }
 
     {
@@ -169,7 +200,10 @@ fn csc_matrix_try_from_invalid_csc_data() {
         let indices = vec![0, 5, 1, 2, 3];
         let values = vec![0, 1, 2, 3, 4];
         let matrix = CscMatrix::try_from_csc_data(6, 3, offsets, indices, values);
-        assert_eq!(matrix.unwrap_err().kind(), &SparseFormatErrorKind::InvalidStructure);
+        assert_eq!(
+            matrix.unwrap_err().kind(),
+            &SparseFormatErrorKind::InvalidStructure
+        );
     }
 
     {
@@ -178,7 +212,10 @@ fn csc_matrix_try_from_invalid_csc_data() {
         let indices = vec![0, 5, 1, 2, 3];
         let values = vec![0, 1, 2, 3, 4];
         let matrix = CscMatrix::try_from_csc_data(6, 3, offsets, indices, values);
-        assert_eq!(matrix.unwrap_err().kind(), &SparseFormatErrorKind::InvalidStructure);
+        assert_eq!(
+            matrix.unwrap_err().kind(),
+            &SparseFormatErrorKind::InvalidStructure
+        );
     }
 
     {
@@ -187,7 +224,10 @@ fn csc_matrix_try_from_invalid_csc_data() {
         let indices = vec![0, 5, 1, 2, 3];
         let values = vec![0, 1, 2, 3, 4];
         let matrix = CscMatrix::try_from_csc_data(6, 3, offsets, indices, values);
-        assert_eq!(matrix.unwrap_err().kind(), &SparseFormatErrorKind::InvalidStructure);
+        assert_eq!(
+            matrix.unwrap_err().kind(),
+            &SparseFormatErrorKind::InvalidStructure
+        );
     }
 
     {
@@ -196,7 +236,10 @@ fn csc_matrix_try_from_invalid_csc_data() {
         let indices = vec![0, 1, 2, 3, 4];
         let values = vec![0, 1, 2, 3, 4];
         let matrix = CscMatrix::try_from_csc_data(6, 3, offsets, indices, values);
-        assert_eq!(matrix.unwrap_err().kind(), &SparseFormatErrorKind::InvalidStructure);
+        assert_eq!(
+            matrix.unwrap_err().kind(),
+            &SparseFormatErrorKind::InvalidStructure
+        );
     }
 
     {
@@ -205,7 +248,10 @@ fn csc_matrix_try_from_invalid_csc_data() {
         let indices = vec![0, 2, 3, 1, 4];
         let values = vec![0, 1, 2, 3, 4];
         let matrix = CscMatrix::try_from_csc_data(6, 3, offsets, indices, values);
-        assert_eq!(matrix.unwrap_err().kind(), &SparseFormatErrorKind::InvalidStructure);
+        assert_eq!(
+            matrix.unwrap_err().kind(),
+            &SparseFormatErrorKind::InvalidStructure
+        );
     }
 
     {
@@ -214,7 +260,10 @@ fn csc_matrix_try_from_invalid_csc_data() {
         let indices = vec![0, 6, 1, 2, 3];
         let values = vec![0, 1, 2, 3, 4];
         let matrix = CscMatrix::try_from_csc_data(6, 3, offsets, indices, values);
-        assert_eq!(matrix.unwrap_err().kind(), &SparseFormatErrorKind::IndexOutOfBounds);
+        assert_eq!(
+            matrix.unwrap_err().kind(),
+            &SparseFormatErrorKind::IndexOutOfBounds
+        );
     }
 
     {
@@ -223,9 +272,11 @@ fn csc_matrix_try_from_invalid_csc_data() {
         let indices = vec![0, 5, 2, 2, 3];
         let values = vec![0, 1, 2, 3, 4];
         let matrix = CscMatrix::try_from_csc_data(6, 3, offsets, indices, values);
-        assert_eq!(matrix.unwrap_err().kind(), &SparseFormatErrorKind::DuplicateEntry);
+        assert_eq!(
+            matrix.unwrap_err().kind(),
+            &SparseFormatErrorKind::DuplicateEntry
+        );
     }
-
 }
 
 #[test]
@@ -239,11 +290,7 @@ fn csc_disassemble_avoids_clone_when_owned() {
     let offsets_ptr = offsets.as_ptr();
     let indices_ptr = indices.as_ptr();
     let values_ptr = values.as_ptr();
-    let matrix = CscMatrix::try_from_csc_data(6,
+    let matrix = CscMatrix::try_from_csc_data(6, 3, offsets, indices, values).unwrap();
-                                              3,
-                                              offsets,
-                                              indices,
-                                              values).unwrap();
 
     let (offsets, indices, values) = matrix.disassemble();
     assert_eq!(offsets.as_ptr(), offsets_ptr);

nalgebra-sparse/tests/unit_tests/csr.rs

@@ -1,6 +1,6 @@
+use nalgebra::DMatrix;
 use nalgebra_sparse::csr::CsrMatrix;
 use nalgebra_sparse::SparseFormatErrorKind;
-use nalgebra::DMatrix;
 
 use proptest::prelude::*;
 use proptest::sample::subsequence;
@@ -9,7 +9,6 @@ use crate::common::csr_strategy;
 
 use std::collections::HashSet;
 
-
 #[test]
 fn csr_matrix_valid_data() {
     // Construct matrix from valid data and check that selected methods return results
@@ -43,7 +42,10 @@ fn csr_matrix_valid_data() {
         assert_eq!(matrix.row_mut(0).col_indices(), &[]);
         assert_eq!(matrix.row_mut(0).values(), &[]);
         assert_eq!(matrix.row_mut(0).values_mut(), &[]);
-        assert_eq!(matrix.row_mut(0).cols_and_values_mut(), ([].as_ref(), [].as_mut()));
+        assert_eq!(
+            matrix.row_mut(0).cols_and_values_mut(),
+            ([].as_ref(), [].as_mut())
+        );
 
         assert_eq!(matrix.row(1).ncols(), 2);
         assert_eq!(matrix.row(1).nnz(), 0);
@@ -54,7 +56,10 @@ fn csr_matrix_valid_data() {
         assert_eq!(matrix.row_mut(1).col_indices(), &[]);
         assert_eq!(matrix.row_mut(1).values(), &[]);
         assert_eq!(matrix.row_mut(1).values_mut(), &[]);
-        assert_eq!(matrix.row_mut(1).cols_and_values_mut(), ([].as_ref(), [].as_mut()));
+        assert_eq!(
+            matrix.row_mut(1).cols_and_values_mut(),
+            ([].as_ref(), [].as_mut())
+        );
 
         assert_eq!(matrix.row(2).ncols(), 2);
         assert_eq!(matrix.row(2).nnz(), 0);
@@ -65,7 +70,10 @@ fn csr_matrix_valid_data() {
         assert_eq!(matrix.row_mut(2).col_indices(), &[]);
         assert_eq!(matrix.row_mut(2).values(), &[]);
         assert_eq!(matrix.row_mut(2).values_mut(), &[]);
-        assert_eq!(matrix.row_mut(2).cols_and_values_mut(), ([].as_ref(), [].as_mut()));
+        assert_eq!(
+            matrix.row_mut(2).cols_and_values_mut(),
+            ([].as_ref(), [].as_mut())
+        );
 
         assert!(matrix.get_row(3).is_none());
         assert!(matrix.get_row_mut(3).is_none());
@@ -82,11 +90,9 @@ fn csr_matrix_valid_data() {
         let offsets = vec![0, 2, 2, 5];
         let indices = vec![0, 5, 1, 2, 3];
         let values = vec![0, 1, 2, 3, 4];
-        let mut matrix = CsrMatrix::try_from_csr_data(3,
+        let mut matrix =
-                                                      6,
+            CsrMatrix::try_from_csr_data(3, 6, offsets.clone(), indices.clone(), values.clone())
-                                                      offsets.clone(),
+                .unwrap();
-                                                      indices.clone(),
-                                                      values.clone()).unwrap();
 
         assert_eq!(matrix.nrows(), 3);
         assert_eq!(matrix.ncols(), 6);
@@ -96,10 +102,20 @@ fn csr_matrix_valid_data() {
         assert_eq!(matrix.values(), &[0, 1, 2, 3, 4]);
 
         let expected_triplets = vec![(0, 0, 0), (0, 5, 1), (2, 1, 2), (2, 2, 3), (2, 3, 4)];
-        assert_eq!(matrix.triplet_iter().map(|(i, j, v)| (i, j, *v)).collect::<Vec<_>>(),
+        assert_eq!(
-                   expected_triplets);
+            matrix
-        assert_eq!(matrix.triplet_iter_mut().map(|(i, j, v)| (i, j, *v)).collect::<Vec<_>>(),
+                .triplet_iter()
-                   expected_triplets);
+                .map(|(i, j, v)| (i, j, *v))
+                .collect::<Vec<_>>(),
+            expected_triplets
+        );
+        assert_eq!(
+            matrix
+                .triplet_iter_mut()
+                .map(|(i, j, v)| (i, j, *v))
+                .collect::<Vec<_>>(),
+            expected_triplets
+        );
 
         assert_eq!(matrix.row(0).ncols(), 6);
         assert_eq!(matrix.row(0).nnz(), 2);
@@ -110,7 +126,10 @@ fn csr_matrix_valid_data() {
         assert_eq!(matrix.row_mut(0).col_indices(), &[0, 5]);
         assert_eq!(matrix.row_mut(0).values(), &[0, 1]);
         assert_eq!(matrix.row_mut(0).values_mut(), &[0, 1]);
-        assert_eq!(matrix.row_mut(0).cols_and_values_mut(), ([0, 5].as_ref(), [0, 1].as_mut()));
+        assert_eq!(
+            matrix.row_mut(0).cols_and_values_mut(),
+            ([0, 5].as_ref(), [0, 1].as_mut())
+        );
 
         assert_eq!(matrix.row(1).ncols(), 6);
         assert_eq!(matrix.row(1).nnz(), 0);
@@ -121,7 +140,10 @@ fn csr_matrix_valid_data() {
         assert_eq!(matrix.row_mut(1).col_indices(), &[]);
         assert_eq!(matrix.row_mut(1).values(), &[]);
         assert_eq!(matrix.row_mut(1).values_mut(), &[]);
-        assert_eq!(matrix.row_mut(1).cols_and_values_mut(), ([].as_ref(), [].as_mut()));
+        assert_eq!(
+            matrix.row_mut(1).cols_and_values_mut(),
+            ([].as_ref(), [].as_mut())
+        );
 
         assert_eq!(matrix.row(2).ncols(), 6);
         assert_eq!(matrix.row(2).nnz(), 3);
@@ -132,7 +154,10 @@ fn csr_matrix_valid_data() {
         assert_eq!(matrix.row_mut(2).col_indices(), &[1, 2, 3]);
         assert_eq!(matrix.row_mut(2).values(), &[2, 3, 4]);
         assert_eq!(matrix.row_mut(2).values_mut(), &[2, 3, 4]);
-        assert_eq!(matrix.row_mut(2).cols_and_values_mut(), ([1, 2, 3].as_ref(), [2, 3, 4].as_mut()));
+        assert_eq!(
+            matrix.row_mut(2).cols_and_values_mut(),
+            ([1, 2, 3].as_ref(), [2, 3, 4].as_mut())
+        );
 
         assert!(matrix.get_row(3).is_none());
         assert!(matrix.get_row_mut(3).is_none());
@@ -147,11 +172,13 @@ fn csr_matrix_valid_data() {
 
 #[test]
 fn csr_matrix_try_from_invalid_csr_data() {
-
     {
         // Empty offset array (invalid length)
         let matrix = CsrMatrix::try_from_csr_data(0, 0, Vec::new(), Vec::new(), Vec::<u32>::new());
-        assert_eq!(matrix.unwrap_err().kind(), &SparseFormatErrorKind::InvalidStructure);
+        assert_eq!(
+            matrix.unwrap_err().kind(),
+            &SparseFormatErrorKind::InvalidStructure
+        );
     }
 
     {
@@ -161,7 +188,10 @@ fn csr_matrix_try_from_invalid_csr_data() {
         let values = vec![0, 1, 2, 3, 4];
 
         let matrix = CsrMatrix::try_from_csr_data(3, 6, offsets, indices, values);
-        assert_eq!(matrix.unwrap_err().kind(), &SparseFormatErrorKind::InvalidStructure);
+        assert_eq!(
+            matrix.unwrap_err().kind(),
+            &SparseFormatErrorKind::InvalidStructure
+        );
     }
 
     {
@@ -170,7 +200,10 @@ fn csr_matrix_try_from_invalid_csr_data() {
         let indices = vec![0, 5, 1, 2, 3];
         let values = vec![0, 1, 2, 3, 4];
         let matrix = CsrMatrix::try_from_csr_data(3, 6, offsets, indices, values);
-        assert_eq!(matrix.unwrap_err().kind(), &SparseFormatErrorKind::InvalidStructure);
+        assert_eq!(
+            matrix.unwrap_err().kind(),
+            &SparseFormatErrorKind::InvalidStructure
+        );
     }
 
     {
@@ -179,7 +212,10 @@ fn csr_matrix_try_from_invalid_csr_data() {
         let indices = vec![0, 5, 1, 2, 3];
         let values = vec![0, 1, 2, 3, 4];
         let matrix = CsrMatrix::try_from_csr_data(3, 6, offsets, indices, values);
-        assert_eq!(matrix.unwrap_err().kind(), &SparseFormatErrorKind::InvalidStructure);
+        assert_eq!(
+            matrix.unwrap_err().kind(),
+            &SparseFormatErrorKind::InvalidStructure
+        );
     }
 
     {
@@ -188,7 +224,10 @@ fn csr_matrix_try_from_invalid_csr_data() {
         let indices = vec![0, 5, 1, 2, 3];
         let values = vec![0, 1, 2, 3, 4];
         let matrix = CsrMatrix::try_from_csr_data(3, 6, offsets, indices, values);
-        assert_eq!(matrix.unwrap_err().kind(), &SparseFormatErrorKind::InvalidStructure);
+        assert_eq!(
+            matrix.unwrap_err().kind(),
+            &SparseFormatErrorKind::InvalidStructure
+        );
     }
 
     {
@@ -197,7 +236,10 @@ fn csr_matrix_try_from_invalid_csr_data() {
         let indices = vec![0, 1, 2, 3, 4];
         let values = vec![0, 1, 2, 3, 4];
         let matrix = CsrMatrix::try_from_csr_data(3, 6, offsets, indices, values);
-        assert_eq!(matrix.unwrap_err().kind(), &SparseFormatErrorKind::InvalidStructure);
+        assert_eq!(
+            matrix.unwrap_err().kind(),
+            &SparseFormatErrorKind::InvalidStructure
+        );
     }
 
     {
@@ -206,7 +248,10 @@ fn csr_matrix_try_from_invalid_csr_data() {
         let indices = vec![0, 2, 3, 1, 4];
         let values = vec![0, 1, 2, 3, 4];
         let matrix = CsrMatrix::try_from_csr_data(3, 6, offsets, indices, values);
-        assert_eq!(matrix.unwrap_err().kind(), &SparseFormatErrorKind::InvalidStructure);
+        assert_eq!(
+            matrix.unwrap_err().kind(),
+            &SparseFormatErrorKind::InvalidStructure
+        );
     }
 
     {
@@ -215,7 +260,10 @@ fn csr_matrix_try_from_invalid_csr_data() {
         let indices = vec![0, 6, 1, 2, 3];
         let values = vec![0, 1, 2, 3, 4];
         let matrix = CsrMatrix::try_from_csr_data(3, 6, offsets, indices, values);
-        assert_eq!(matrix.unwrap_err().kind(), &SparseFormatErrorKind::IndexOutOfBounds);
+        assert_eq!(
+            matrix.unwrap_err().kind(),
+            &SparseFormatErrorKind::IndexOutOfBounds
+        );
     }
 
     {
@@ -224,9 +272,11 @@ fn csr_matrix_try_from_invalid_csr_data() {
         let indices = vec![0, 5, 2, 2, 3];
         let values = vec![0, 1, 2, 3, 4];
         let matrix = CsrMatrix::try_from_csr_data(3, 6, offsets, indices, values);
-        assert_eq!(matrix.unwrap_err().kind(), &SparseFormatErrorKind::DuplicateEntry);
+        assert_eq!(
+            matrix.unwrap_err().kind(),
+            &SparseFormatErrorKind::DuplicateEntry
+        );
     }
-
 }
 
 #[test]
@@ -240,11 +290,7 @@ fn csr_disassemble_avoids_clone_when_owned() {
     let offsets_ptr = offsets.as_ptr();
     let indices_ptr = indices.as_ptr();
     let values_ptr = values.as_ptr();
-    let matrix = CsrMatrix::try_from_csr_data(3,
+    let matrix = CsrMatrix::try_from_csr_data(3, 6, offsets, indices, values).unwrap();
-                                              6,
-                                              offsets,
-                                              indices,
-                                              values).unwrap();
 
     let (offsets, indices, values) = matrix.disassemble();
     assert_eq!(offsets.as_ptr(), offsets_ptr);

nalgebra-sparse/tests/unit_tests/mod.rs

@@ -1,8 +1,8 @@
-mod coo;
 mod cholesky;
+mod convert_serial;
+mod coo;
+mod csc;
+mod csr;
 mod ops;
 mod pattern;
-mod csr;
-mod csc;
-mod convert_serial;
 mod proptest;

nalgebra-sparse/tests/unit_tests/ops.rs

@@ -1,13 +1,19 @@
-use crate::common::{csc_strategy, csr_strategy, PROPTEST_MATRIX_DIM, PROPTEST_MAX_NNZ, PROPTEST_I32_VALUE_STRATEGY, non_zero_i32_value_strategy, value_strategy};
+use crate::common::{
-use nalgebra_sparse::ops::serial::{spmm_csr_dense, spmm_csc_dense, spadd_pattern, spadd_csr_prealloc, spadd_csc_prealloc, spmm_csr_prealloc, spmm_csc_prealloc, spsolve_csc_lower_triangular, spmm_csr_pattern};
+    csc_strategy, csr_strategy, non_zero_i32_value_strategy, value_strategy,
-use nalgebra_sparse::ops::{Op};
+    PROPTEST_I32_VALUE_STRATEGY, PROPTEST_MATRIX_DIM, PROPTEST_MAX_NNZ,
-use nalgebra_sparse::csr::CsrMatrix;
+};
 use nalgebra_sparse::csc::CscMatrix;
-use nalgebra_sparse::proptest::{csc, csr, sparsity_pattern};
+use nalgebra_sparse::csr::CsrMatrix;
+use nalgebra_sparse::ops::serial::{
+    spadd_csc_prealloc, spadd_csr_prealloc, spadd_pattern, spmm_csc_dense, spmm_csc_prealloc,
+    spmm_csr_dense, spmm_csr_pattern, spmm_csr_prealloc, spsolve_csc_lower_triangular,
+};
+use nalgebra_sparse::ops::Op;
 use nalgebra_sparse::pattern::SparsityPattern;
+use nalgebra_sparse::proptest::{csc, csr, sparsity_pattern};
 
-use nalgebra::{DMatrix, Scalar, DMatrixSliceMut, DMatrixSlice};
 use nalgebra::proptest::{matrix, vector};
+use nalgebra::{DMatrix, DMatrixSlice, DMatrixSliceMut, Scalar};
 
 use proptest::prelude::*;
 
@@ -17,19 +23,15 @@ use std::panic::catch_unwind;
 
 /// Represents the sparsity pattern of a CSR matrix as a dense matrix with 0/1
 fn dense_csr_pattern(pattern: &SparsityPattern) -> DMatrix<i32> {
-    let boolean_csr = CsrMatrix::try_from_pattern_and_values(
+    let boolean_csr =
-            pattern.clone(),
+        CsrMatrix::try_from_pattern_and_values(pattern.clone(), vec![1; pattern.nnz()]).unwrap();
-            vec![1; pattern.nnz()])
-        .unwrap();
     DMatrix::from(&boolean_csr)
 }
 
 /// Represents the sparsity pattern of a CSC matrix as a dense matrix with 0/1
 fn dense_csc_pattern(pattern: &SparsityPattern) -> DMatrix<i32> {
-    let boolean_csc = CscMatrix::try_from_pattern_and_values(
+    let boolean_csc =
-        pattern.clone(),
+        CscMatrix::try_from_pattern_and_values(pattern.clone(), vec![1; pattern.nnz()]).unwrap();
-        vec![1; pattern.nnz()])
-        .unwrap();
     DMatrix::from(&boolean_csc)
 }
 
@@ -53,7 +55,7 @@ struct SpmmCscDenseArgs<T: Scalar> {
 
 /// Returns matrices C, A and B with compatible dimensions such that it can be used
 /// in an `spmm` operation `C = beta * C + alpha * trans(A) * trans(B)`.
-fn spmm_csr_dense_args_strategy() -> impl Strategy<Value=SpmmCsrDenseArgs<i32>> {
+fn spmm_csr_dense_args_strategy() -> impl Strategy<Value = SpmmCsrDenseArgs<i32>> {
     let max_nnz = PROPTEST_MAX_NNZ;
     let value_strategy = PROPTEST_I32_VALUE_STRATEGY;
     let c_rows = PROPTEST_MATRIX_DIM;
@@ -62,14 +64,23 @@ fn spmm_csr_dense_args_strategy() -> impl Strategy<Value=SpmmCsrDenseArgs<i32>>
     let trans_strategy = trans_strategy();
     let c_matrix_strategy = matrix(value_strategy.clone(), c_rows, c_cols);
 
-    (c_matrix_strategy, common_dim, trans_strategy.clone(), trans_strategy.clone())
+    (
+        c_matrix_strategy,
+        common_dim,
+        trans_strategy.clone(),
+        trans_strategy.clone(),
+    )
         .prop_flat_map(move |(c, common_dim, trans_a, trans_b)| {
-            let a_shape =
+            let a_shape = if trans_a {
-                if trans_a { (common_dim, c.nrows()) }
+                (common_dim, c.nrows())
-                else { (c.nrows(), common_dim) };
+            } else {
-            let b_shape =
+                (c.nrows(), common_dim)
-                if trans_b { (c.ncols(), common_dim) }
+            };
-                else { (common_dim, c.ncols()) };
+            let b_shape = if trans_b {
+                (c.ncols(), common_dim)
+            } else {
+                (common_dim, c.ncols())
+            };
             let a = csr(value_strategy.clone(), a_shape.0, a_shape.1, max_nnz);
             let b = matrix(value_strategy.clone(), b_shape.0, b_shape.1);
 
@@ -78,29 +89,35 @@ fn spmm_csr_dense_args_strategy() -> impl Strategy<Value=SpmmCsrDenseArgs<i32>>
             let beta = value_strategy.clone();
 
             (Just(c), beta, alpha, Just(trans_a), a, Just(trans_b), b)
-        }).prop_map(|(c, beta, alpha, trans_a, a, trans_b, b)| {
+        })
-            SpmmCsrDenseArgs {
+        .prop_map(
+            |(c, beta, alpha, trans_a, a, trans_b, b)| SpmmCsrDenseArgs {
                 c,
                 beta,
                 alpha,
-                a: if trans_a { Op::Transpose(a) } else { Op::NoOp(a) },
+                a: if trans_a {
-                b: if trans_b { Op::Transpose(b) } else { Op::NoOp(b) },
+                    Op::Transpose(a)
-            }
+                } else {
-        })
+                    Op::NoOp(a)
+                },
+                b: if trans_b {
+                    Op::Transpose(b)
+                } else {
+                    Op::NoOp(b)
+                },
+            },
+        )
 }
 
 /// Returns matrices C, A and B with compatible dimensions such that it can be used
 /// in an `spmm` operation `C = beta * C + alpha * trans(A) * trans(B)`.
-fn spmm_csc_dense_args_strategy() -> impl Strategy<Value=SpmmCscDenseArgs<i32>> {
+fn spmm_csc_dense_args_strategy() -> impl Strategy<Value = SpmmCscDenseArgs<i32>> {
-    spmm_csr_dense_args_strategy()
+    spmm_csr_dense_args_strategy().prop_map(|args| SpmmCscDenseArgs {
-        .prop_map(|args| {
-            SpmmCscDenseArgs {
         c: args.c,
         beta: args.beta,
         alpha: args.alpha,
         a: args.a.map_same_op(|a| CscMatrix::from(&a)),
-                b: args.b
+        b: args.b,
-            }
     })
 }
 
@@ -120,7 +137,7 @@ struct SpaddCscArgs<T> {
     a: Op<CscMatrix<T>>,
 }
 
-fn spadd_csr_prealloc_args_strategy() -> impl Strategy<Value=SpaddCsrArgs<i32>> {
+fn spadd_csr_prealloc_args_strategy() -> impl Strategy<Value = SpaddCsrArgs<i32>> {
     let value_strategy = PROPTEST_I32_VALUE_STRATEGY;
 
     spadd_pattern_strategy()
@@ -131,63 +148,80 @@ fn spadd_csr_prealloc_args_strategy() -> impl Strategy<Value=SpaddCsrArgs<i32>>
             let c_values = vec![value_strategy.clone(); c_pattern.nnz()];
             let alpha = value_strategy.clone();
             let beta = value_strategy.clone();
-            (Just(c_pattern), Just(a_pattern), c_values, a_values, alpha, beta, trans_strategy())
+            (
-        }).prop_map(|(c_pattern, a_pattern, c_values, a_values, alpha, beta, trans_a)| {
+                Just(c_pattern),
+                Just(a_pattern),
+                c_values,
+                a_values,
+                alpha,
+                beta,
+                trans_strategy(),
+            )
+        })
+        .prop_map(
+            |(c_pattern, a_pattern, c_values, a_values, alpha, beta, trans_a)| {
                 let c = CsrMatrix::try_from_pattern_and_values(c_pattern, c_values).unwrap();
                 let a = CsrMatrix::try_from_pattern_and_values(a_pattern, a_values).unwrap();
 
-            let a = if trans_a { Op::Transpose(a.transpose()) } else { Op::NoOp(a) };
+                let a = if trans_a {
+                    Op::Transpose(a.transpose())
+                } else {
+                    Op::NoOp(a)
+                };
                 SpaddCsrArgs { c, beta, alpha, a }
-        })
+            },
+        )
 }
 
-fn spadd_csc_prealloc_args_strategy() -> impl Strategy<Value=SpaddCscArgs<i32>> {
+fn spadd_csc_prealloc_args_strategy() -> impl Strategy<Value = SpaddCscArgs<i32>> {
-    spadd_csr_prealloc_args_strategy()
+    spadd_csr_prealloc_args_strategy().prop_map(|args| SpaddCscArgs {
-        .prop_map(|args| SpaddCscArgs {
         c: CscMatrix::from(&args.c),
         beta: args.beta,
         alpha: args.alpha,
-            a: args.a.map_same_op(|a| CscMatrix::from(&a))
+        a: args.a.map_same_op(|a| CscMatrix::from(&a)),
     })
 }
 
-fn dense_strategy() -> impl Strategy<Value=DMatrix<i32>> {
+fn dense_strategy() -> impl Strategy<Value = DMatrix<i32>> {
-    matrix(PROPTEST_I32_VALUE_STRATEGY, PROPTEST_MATRIX_DIM, PROPTEST_MATRIX_DIM)
+    matrix(
+        PROPTEST_I32_VALUE_STRATEGY,
+        PROPTEST_MATRIX_DIM,
+        PROPTEST_MATRIX_DIM,
+    )
 }
 
-fn trans_strategy() -> impl Strategy<Value=bool> + Clone {
+fn trans_strategy() -> impl Strategy<Value = bool> + Clone {
     proptest::bool::ANY
 }
 
 /// Wraps the values of the given strategy in `Op`, producing both transposed and non-transposed
 /// values.
-fn op_strategy<S: Strategy>(strategy: S) -> impl Strategy<Value=Op<S::Value>> {
+fn op_strategy<S: Strategy>(strategy: S) -> impl Strategy<Value = Op<S::Value>> {
     let is_transposed = proptest::bool::ANY;
-    (strategy, is_transposed)
+    (strategy, is_transposed).prop_map(|(obj, is_trans)| {
-        .prop_map(|(obj, is_trans)| if is_trans {
+        if is_trans {
             Op::Transpose(obj)
         } else {
             Op::NoOp(obj)
+        }
     })
 }
 
-fn pattern_strategy() -> impl Strategy<Value=SparsityPattern> {
+fn pattern_strategy() -> impl Strategy<Value = SparsityPattern> {
     sparsity_pattern(PROPTEST_MATRIX_DIM, PROPTEST_MATRIX_DIM, PROPTEST_MAX_NNZ)
 }
 
 /// Constructs pairs (a, b) where a and b have the same dimensions
-fn spadd_pattern_strategy() -> impl Strategy<Value=(SparsityPattern, SparsityPattern)> {
+fn spadd_pattern_strategy() -> impl Strategy<Value = (SparsityPattern, SparsityPattern)> {
-    pattern_strategy()
+    pattern_strategy().prop_flat_map(|a| {
-        .prop_flat_map(|a| {
         let b = sparsity_pattern(a.major_dim(), a.minor_dim(), PROPTEST_MAX_NNZ);
         (Just(a), b)
     })
 }
 
 /// Constructs pairs (a, b) where a and b have compatible dimensions for a matrix product
-fn spmm_csr_pattern_strategy() -> impl Strategy<Value=(SparsityPattern, SparsityPattern)> {
+fn spmm_csr_pattern_strategy() -> impl Strategy<Value = (SparsityPattern, SparsityPattern)> {
-    pattern_strategy()
+    pattern_strategy().prop_flat_map(|a| {
-        .prop_flat_map(|a| {
         let b = sparsity_pattern(a.minor_dim(), PROPTEST_MATRIX_DIM, PROPTEST_MAX_NNZ);
         (Just(a), b)
     })
@@ -211,65 +245,76 @@ struct SpmmCscArgs<T> {
     b: Op<CscMatrix<T>>,
 }
 
-fn spmm_csr_prealloc_args_strategy() -> impl Strategy<Value=SpmmCsrArgs<i32>> {
+fn spmm_csr_prealloc_args_strategy() -> impl Strategy<Value = SpmmCsrArgs<i32>> {
     spmm_csr_pattern_strategy()
         .prop_flat_map(|(a_pattern, b_pattern)| {
             let a_values = vec![PROPTEST_I32_VALUE_STRATEGY; a_pattern.nnz()];
             let b_values = vec![PROPTEST_I32_VALUE_STRATEGY; b_pattern.nnz()];
             let c_pattern = spmm_csr_pattern(&a_pattern, &b_pattern);
             let c_values = vec![PROPTEST_I32_VALUE_STRATEGY; c_pattern.nnz()];
-            let a = a_values.prop_map(move |values|
+            let a = a_values.prop_map(move |values| {
-                CsrMatrix::try_from_pattern_and_values(a_pattern.clone(), values).unwrap());
+                CsrMatrix::try_from_pattern_and_values(a_pattern.clone(), values).unwrap()
-            let b = b_values.prop_map(move |values|
+            });
-                CsrMatrix::try_from_pattern_and_values(b_pattern.clone(), values).unwrap());
+            let b = b_values.prop_map(move |values| {
-            let c = c_values.prop_map(move |values|
+                CsrMatrix::try_from_pattern_and_values(b_pattern.clone(), values).unwrap()
-                CsrMatrix::try_from_pattern_and_values(c_pattern.clone(), values).unwrap());
+            });
+            let c = c_values.prop_map(move |values| {
+                CsrMatrix::try_from_pattern_and_values(c_pattern.clone(), values).unwrap()
+            });
             let alpha = PROPTEST_I32_VALUE_STRATEGY;
             let beta = PROPTEST_I32_VALUE_STRATEGY;
             (c, beta, alpha, trans_strategy(), a, trans_strategy(), b)
         })
-        .prop_map(|(c, beta, alpha, trans_a, a, trans_b, b)| {
+        .prop_map(
-            SpmmCsrArgs::<i32> {
+            |(c, beta, alpha, trans_a, a, trans_b, b)| SpmmCsrArgs::<i32> {
                 c,
                 beta,
                 alpha,
-                a: if trans_a { Op::Transpose(a.transpose()) } else { Op::NoOp(a) },
+                a: if trans_a {
-                b: if trans_b { Op::Transpose(b.transpose()) } else { Op::NoOp(b) }
+                    Op::Transpose(a.transpose())
-            }
+                } else {
-        })
+                    Op::NoOp(a)
+                },
+                b: if trans_b {
+                    Op::Transpose(b.transpose())
+                } else {
+                    Op::NoOp(b)
+                },
+            },
+        )
 }
 
-fn spmm_csc_prealloc_args_strategy() -> impl Strategy<Value=SpmmCscArgs<i32>> {
+fn spmm_csc_prealloc_args_strategy() -> impl Strategy<Value = SpmmCscArgs<i32>> {
     // Note: Converting from CSR is simple, but might be significantly slower than
     // writing a common implementation that can be shared between CSR and CSC args
-    spmm_csr_prealloc_args_strategy()
+    spmm_csr_prealloc_args_strategy().prop_map(|args| SpmmCscArgs {
-        .prop_map(|args| {
-            SpmmCscArgs {
         c: CscMatrix::from(&args.c),
         beta: args.beta,
         alpha: args.alpha,
         a: args.a.map_same_op(|a| CscMatrix::from(&a)),
-                b: args.b.map_same_op(|b| CscMatrix::from(&b))
+        b: args.b.map_same_op(|b| CscMatrix::from(&b)),
-            }
     })
 }
 
-fn csc_invertible_diagonal() -> impl Strategy<Value=CscMatrix<f64>> {
+fn csc_invertible_diagonal() -> impl Strategy<Value = CscMatrix<f64>> {
-    let non_zero_values = value_strategy::<f64>()
+    let non_zero_values =
-        .prop_filter("Only non-zeros values accepted", |x| x != &0.0);
+        value_strategy::<f64>().prop_filter("Only non-zeros values accepted", |x| x != &0.0);
 
-    vector(non_zero_values, PROPTEST_MATRIX_DIM)
+    vector(non_zero_values, PROPTEST_MATRIX_DIM).prop_map(|d| {
-        .prop_map(|d| {
         let mut matrix = CscMatrix::identity(d.len());
         matrix.values_mut().clone_from_slice(&d.as_slice());
         matrix
     })
 }
 
-fn csc_square_with_non_zero_diagonals() -> impl Strategy<Value=CscMatrix<f64>> {
+fn csc_square_with_non_zero_diagonals() -> impl Strategy<Value = CscMatrix<f64>> {
-    csc_invertible_diagonal()
+    csc_invertible_diagonal().prop_flat_map(|d| {
-        .prop_flat_map(|d| {
+        csc(
-            csc(value_strategy::<f64>(), d.nrows(), d.nrows(), PROPTEST_MAX_NNZ)
+            value_strategy::<f64>(),
+            d.nrows(),
+            d.nrows(),
+            PROPTEST_MAX_NNZ,
+        )
         .prop_map(move |mut c| {
             for (i, j, v) in c.triplet_iter_mut() {
                 if i == j {
@@ -285,12 +330,13 @@ fn csc_square_with_non_zero_diagonals() -> impl Strategy<Value=CscMatrix<f64>> {
 }
 
 /// Helper function to help us call dense GEMM with our `Op` type
-fn dense_gemm<'a>(beta: i32,
+fn dense_gemm<'a>(
+    beta: i32,
     c: impl Into<DMatrixSliceMut<'a, i32>>,
     alpha: i32,
     a: Op<impl Into<DMatrixSlice<'a, i32>>>,
-                  b: Op<impl Into<DMatrixSlice<'a, i32>>>)
+    b: Op<impl Into<DMatrixSlice<'a, i32>>>,
-{
+) {
     let mut c = c.into();
     let a = a.convert();
     let b = b.convert();
@@ -300,7 +346,7 @@ fn dense_gemm<'a>(beta: i32,
         (NoOp(a), NoOp(b)) => c.gemm(alpha, &a, &b, beta),
         (Transpose(a), NoOp(b)) => c.gemm(alpha, &a.transpose(), &b, beta),
         (NoOp(a), Transpose(b)) => c.gemm(alpha, &a, &b.transpose(), beta),
-        (Transpose(a), Transpose(b)) => c.gemm(alpha, &a.transpose(), &b.transpose(), beta)
+        (Transpose(a), Transpose(b)) => c.gemm(alpha, &a.transpose(), &b.transpose(), beta),
     }
 }
 

nalgebra-sparse/tests/unit_tests/pattern.rs

@@ -7,10 +7,8 @@ fn sparsity_pattern_valid_data() {
 
     {
         // A pattern with zero explicitly stored entries
-        let pattern = SparsityPattern::try_from_offsets_and_indices(3,
+        let pattern =
-                                                                    2,
+            SparsityPattern::try_from_offsets_and_indices(3, 2, vec![0, 0, 0, 0], Vec::new())
-                                                                    vec![0, 0, 0, 0],
-                                                                    Vec::new())
                 .unwrap();
 
         assert_eq!(pattern.major_dim(), 3);
@@ -46,8 +44,10 @@ fn sparsity_pattern_valid_data() {
         assert_eq!(pattern.lane(0), &[0, 5]);
         assert_eq!(pattern.lane(1), &[]);
         assert_eq!(pattern.lane(2), &[1, 2, 3]);
-        assert_eq!(pattern.entries().collect::<Vec<_>>(),
+        assert_eq!(
-                   vec![(0, 0), (0, 5), (2, 1), (2, 2), (2, 3)]);
+            pattern.entries().collect::<Vec<_>>(),
+            vec![(0, 0), (0, 5), (2, 1), (2, 2), (2, 3)]
+        );
 
         let (offsets2, indices2) = pattern.disassemble();
         assert_eq!(offsets2, offsets);
@@ -60,7 +60,10 @@ fn sparsity_pattern_try_from_invalid_data() {
     {
         // Empty offset array (invalid length)
         let pattern = SparsityPattern::try_from_offsets_and_indices(0, 0, Vec::new(), Vec::new());
-        assert_eq!(pattern, Err(SparsityPatternFormatError::InvalidOffsetArrayLength));
+        assert_eq!(
+            pattern,
+            Err(SparsityPatternFormatError::InvalidOffsetArrayLength)
+        );
     }
 
     {
@@ -69,7 +72,10 @@ fn sparsity_pattern_try_from_invalid_data() {
         let indices = vec![0, 1, 2, 3, 5];
 
         let pattern = SparsityPattern::try_from_offsets_and_indices(3, 6, offsets, indices);
-        assert!(matches!(pattern, Err(SparsityPatternFormatError::InvalidOffsetArrayLength)));
+        assert!(matches!(
+            pattern,
+            Err(SparsityPatternFormatError::InvalidOffsetArrayLength)
+        ));
     }
 
     {
@@ -77,7 +83,10 @@ fn sparsity_pattern_try_from_invalid_data() {
         let offsets = vec![1, 2, 2, 5];
         let indices = vec![0, 5, 1, 2, 3];
         let pattern = SparsityPattern::try_from_offsets_and_indices(3, 6, offsets, indices);
-        assert!(matches!(pattern, Err(SparsityPatternFormatError::InvalidOffsetFirstLast)));
+        assert!(matches!(
+            pattern,
+            Err(SparsityPatternFormatError::InvalidOffsetFirstLast)
+        ));
     }
 
     {
@@ -85,7 +94,10 @@ fn sparsity_pattern_try_from_invalid_data() {
         let offsets = vec![0, 2, 2, 4];
         let indices = vec![0, 5, 1, 2, 3];
         let pattern = SparsityPattern::try_from_offsets_and_indices(3, 6, offsets, indices);
-        assert!(matches!(pattern, Err(SparsityPatternFormatError::InvalidOffsetFirstLast)));
+        assert!(matches!(
+            pattern,
+            Err(SparsityPatternFormatError::InvalidOffsetFirstLast)
+        ));
     }
 
     {
@@ -93,7 +105,10 @@ fn sparsity_pattern_try_from_invalid_data() {
         let offsets = vec![0, 2, 2];
         let indices = vec![0, 5, 1, 2, 3];
         let pattern = SparsityPattern::try_from_offsets_and_indices(3, 6, offsets, indices);
-        assert!(matches!(pattern, Err(SparsityPatternFormatError::InvalidOffsetArrayLength)));
+        assert!(matches!(
+            pattern,
+            Err(SparsityPatternFormatError::InvalidOffsetArrayLength)
+        ));
     }
 
     {
@@ -101,7 +116,10 @@ fn sparsity_pattern_try_from_invalid_data() {
         let offsets = vec![0, 3, 2, 5];
         let indices = vec![0, 1, 2, 3, 4];
         let pattern = SparsityPattern::try_from_offsets_and_indices(3, 6, offsets, indices);
-        assert_eq!(pattern, Err(SparsityPatternFormatError::NonmonotonicOffsets));
+        assert_eq!(
+            pattern,
+            Err(SparsityPatternFormatError::NonmonotonicOffsets)
+        );
     }
 
     {
@@ -109,7 +127,10 @@ fn sparsity_pattern_try_from_invalid_data() {
         let offsets = vec![0, 2, 2, 5];
         let indices = vec![0, 2, 3, 1, 4];
         let pattern = SparsityPattern::try_from_offsets_and_indices(3, 6, offsets, indices);
-        assert_eq!(pattern, Err(SparsityPatternFormatError::NonmonotonicMinorIndices));
+        assert_eq!(
+            pattern,
+            Err(SparsityPatternFormatError::NonmonotonicMinorIndices)
+        );
     }
 
     {
@@ -117,7 +138,10 @@ fn sparsity_pattern_try_from_invalid_data() {
         let offsets = vec![0, 2, 2, 5];
         let indices = vec![0, 6, 1, 2, 3];
         let pattern = SparsityPattern::try_from_offsets_and_indices(3, 6, offsets, indices);
-        assert_eq!(pattern, Err(SparsityPatternFormatError::MinorIndexOutOfBounds));
+        assert_eq!(
+            pattern,
+            Err(SparsityPatternFormatError::MinorIndexOutOfBounds)
+        );
     }
 
     {

nalgebra-sparse/tests/unit_tests/proptest.rs

@@ -6,25 +6,27 @@ fn coo_no_duplicates_generates_admissible_matrices() {
 
 #[cfg(feature = "slow-tests")]
 mod slow {
-    use nalgebra_sparse::proptest::{coo_with_duplicates, coo_no_duplicates, csr, csc, sparsity_pattern};
     use nalgebra::DMatrix;
+    use nalgebra_sparse::proptest::{
+        coo_no_duplicates, coo_with_duplicates, csc, csr, sparsity_pattern,
+    };
 
-    use proptest::test_runner::TestRunner;
-    use proptest::strategy::ValueTree;
     use itertools::Itertools;
+    use proptest::strategy::ValueTree;
+    use proptest::test_runner::TestRunner;
 
     use proptest::prelude::*;
 
+    use nalgebra_sparse::csr::CsrMatrix;
     use std::collections::HashSet;
     use std::iter::repeat;
     use std::ops::RangeInclusive;
-    use nalgebra_sparse::csr::CsrMatrix;
 
-    fn generate_all_possible_matrices(value_range: RangeInclusive<i32>,
+    fn generate_all_possible_matrices(
+        value_range: RangeInclusive<i32>,
         rows_range: RangeInclusive<usize>,
-                                      cols_range: RangeInclusive<usize>)
+        cols_range: RangeInclusive<usize>,
-                                      -> HashSet<DMatrix<i32>>
+    ) -> HashSet<DMatrix<i32>> {
-    {
         // Enumerate all possible combinations
         let mut all_combinations = HashSet::new();
         for nrows in rows_range {
@@ -48,7 +50,11 @@ mod slow {
                         .take(n_values)
                         .multi_cartesian_product();
                     for matrix_values in values_iter {
-                        all_combinations.insert(DMatrix::from_row_slice(nrows, ncols, &matrix_values));
+                        all_combinations.insert(DMatrix::from_row_slice(
+                            nrows,
+                            ncols,
+                            &matrix_values,
+                        ));
                     }
                 }
             }
@@ -80,12 +86,14 @@ mod slow {
         // Enumerate all possible combinations
         let all_combinations = generate_all_possible_matrices(values, rows, cols);
 
-        let visited_combinations = sample_matrix_output_space(strategy,
+        let visited_combinations =
-                                                              &mut runner,
+            sample_matrix_output_space(strategy, &mut runner, num_generated_matrices);
-                                                              num_generated_matrices);
 
         assert_eq!(visited_combinations.len(), all_combinations.len());
-        assert_eq!(visited_combinations, all_combinations, "Did not sample all possible values.");
+        assert_eq!(
+            visited_combinations, all_combinations,
+            "Did not sample all possible values."
+        );
     }
 
     #[cfg(feature = "slow-tests")]
@@ -113,9 +121,8 @@ mod slow {
         // `coo_with_duplicates`)
         let all_combinations = generate_all_possible_matrices(values, rows, cols);
 
-        let visited_combinations = sample_matrix_output_space(strategy,
+        let visited_combinations =
-                                                              &mut runner,
+            sample_matrix_output_space(strategy, &mut runner, num_generated_matrices);
-                                                              num_generated_matrices);
 
         // Here we cannot verify that the set of visited combinations is *equal* to
         // all possible outcomes with the given constraints, however the
@@ -143,12 +150,14 @@ mod slow {
 
         let all_combinations = generate_all_possible_matrices(values, rows, cols);
 
-        let visited_combinations = sample_matrix_output_space(strategy,
+        let visited_combinations =
-                                                              &mut runner,
+            sample_matrix_output_space(strategy, &mut runner, num_generated_matrices);
-                                                              num_generated_matrices);
 
         assert_eq!(visited_combinations.len(), all_combinations.len());
-        assert_eq!(visited_combinations, all_combinations, "Did not sample all possible values.");
+        assert_eq!(
+            visited_combinations, all_combinations,
+            "Did not sample all possible values."
+        );
     }
 
     #[cfg(feature = "slow-tests")]
@@ -169,12 +178,14 @@ mod slow {
 
         let all_combinations = generate_all_possible_matrices(values, rows, cols);
 
-        let visited_combinations = sample_matrix_output_space(strategy,
+        let visited_combinations =
-                                                              &mut runner,
+            sample_matrix_output_space(strategy, &mut runner, num_generated_matrices);
-                                                              num_generated_matrices);
 
         assert_eq!(visited_combinations.len(), all_combinations.len());
-        assert_eq!(visited_combinations, all_combinations, "Did not sample all possible values.");
+        assert_eq!(
+            visited_combinations, all_combinations,
+            "Did not sample all possible values."
+        );
     }
 
     #[cfg(feature = "slow-tests")]
@@ -206,13 +217,14 @@ mod slow {
         assert_eq!(visited_patterns, all_possible_patterns);
     }
 
-    fn sample_matrix_output_space<S>(strategy: S,
+    fn sample_matrix_output_space<S>(
+        strategy: S,
         runner: &mut TestRunner,
-                                     num_samples: usize)
+        num_samples: usize,
-        -> HashSet<DMatrix<i32>>
+    ) -> HashSet<DMatrix<i32>>
     where
         S: Strategy,
-        DMatrix<i32>: for<'b> From<&'b S::Value>
+        DMatrix<i32>: for<'b> From<&'b S::Value>,
     {
         sample_strategy(strategy, runner)
             .take(num_samples)
@@ -220,8 +232,10 @@ mod slow {
             .collect()
     }
 
-    fn sample_strategy<'a, S: 'a + Strategy>(strategy: S, runner: &'a mut TestRunner)
+    fn sample_strategy<'a, S: 'a + Strategy>(
-            -> impl 'a + Iterator<Item=S::Value> {
+        strategy: S,
+        runner: &'a mut TestRunner,
+    ) -> impl 'a + Iterator<Item = S::Value> {
         repeat(()).map(move |_| {
             let tree = strategy
                 .new_tree(runner)