From ff4e44a8ed808384684bb477348ad08d7af2ffb1 Mon Sep 17 00:00:00 2001
From: Jack Wrenn <me@jswrenn.com>
Date: Tue, 6 Nov 2018 19:46:28 -0500
Subject: [PATCH] Introduces a `from_vec` constructor for `MatrixMN`.

Addresses #378.

The implementation of `from_vec` simply wraps a call to
`from_iterator_generic`. Because the standard library's implementation
of `into_iter` is specialized for the `.into_iter().collect<Vec<_>>()`
case (see https://github.com/rust-lang/rust/issues/46084#issuecomment-345524508),
this is equivalent to re-using the original Vec as storage.
---
 src/base/construction.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/base/construction.rs b/src/base/construction.rs
index 52e99cd7..9c10fbe5 100644
--- a/src/base/construction.rs
+++ b/src/base/construction.rs
@@ -257,6 +257,13 @@ where DefaultAllocator: Allocator<N, R, C>
     {
         Self::from_fn_generic(nrows, ncols, |_, _| distribution.sample(rng))
     }
+
+    /// Creates a matrix backed by a given vector.
+    #[inline]
+    #[cfg(feature = "std")]
+    pub fn from_vec(nrows: R, ncols: C, data: Vec<N>) -> Self {
+        Self::from_iterator_generic(nrows, ncols, data)
+    }
 }
 
 impl<N, D: Dim> MatrixN<N, D>