From 8bf94f7afb9709438212f190d3411662d601597a Mon Sep 17 00:00:00 2001
From: sebcrozet <developer@crozet.re>
Date: Tue, 24 Dec 2019 17:37:27 +0100
Subject: [PATCH] Add matrix/slice conversions.

Fix #687.
---
 src/base/conversion.rs | 31 ++++++++++++++++++++++++++++++-
 1 file changed, 30 insertions(+), 1 deletion(-)

diff --git a/src/base/conversion.rs b/src/base/conversion.rs
index 883f3fb8..414a3406 100644
--- a/src/base/conversion.rs
+++ b/src/base/conversion.rs
@@ -21,7 +21,7 @@ use crate::base::storage::{ContiguousStorage, ContiguousStorageMut, Storage, Sto
 #[cfg(any(feature = "std", feature = "alloc"))]
 use crate::base::VecStorage;
 use crate::base::{SliceStorage, SliceStorageMut};
-use crate::base::{DefaultAllocator, Matrix, ArrayStorage, MatrixMN, MatrixSlice, MatrixSliceMut, Scalar};
+use crate::base::{DefaultAllocator, Matrix, ArrayStorage, MatrixMN, MatrixSlice, MatrixSliceMut, Scalar, DVectorSlice, DVectorSliceMut};
 use crate::constraint::DimEq;
 
 // FIXME: too bad this won't work allo slice conversions.
@@ -524,4 +524,33 @@ for MatrixSliceMut<'a, N, RSlice, CSlice, RStride, CStride>
             Matrix::from_data_statically_unchecked(data)
         }
     }
+}
+
+impl<'a, N: Scalar + Copy, R: Dim, C: Dim, S: ContiguousStorage<N, R, C>> Into<&'a [N]> for &'a Matrix<N, R, C, S> {
+    #[inline]
+    fn into(self) -> &'a [N] {
+        self.as_slice()
+    }
+}
+
+impl<'a, N: Scalar + Copy, R: Dim, C: Dim, S: ContiguousStorageMut<N, R, C>> Into<&'a mut [N]> for &'a mut Matrix<N, R, C, S> {
+    #[inline]
+    fn into(self) -> &'a mut [N] {
+        self.as_mut_slice()
+    }
+}
+
+
+impl<'a, N: Scalar + Copy> From<&'a [N]> for DVectorSlice<'a, N> {
+    #[inline]
+    fn from(slice: &'a [N]) -> Self {
+        Self::from_slice(slice, slice.len())
+    }
+}
+
+impl<'a, N: Scalar + Copy> From<&'a mut [N]> for DVectorSliceMut<'a, N> {
+    #[inline]
+    fn from(slice: &'a mut [N]) -> Self {
+        Self::from_slice(slice, slice.len())
+    }
 }
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