From a6901dd007ee4417a071a7f73233dd35d796f273 Mon Sep 17 00:00:00 2001
From: Henry Weller <http://cfd.direct>
Date: Wed, 30 Mar 2016 18:16:47 +0100
Subject: [PATCH] MatrixSpace: Add support for block conversion into
 VectorSpace

---
 src/OpenFOAM/primitives/MatrixSpace/MatrixSpaceI.H | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/OpenFOAM/primitives/MatrixSpace/MatrixSpaceI.H b/src/OpenFOAM/primitives/MatrixSpace/MatrixSpaceI.H
index 2aa3a4d52b..ff636aa933 100644
--- a/src/OpenFOAM/primitives/MatrixSpace/MatrixSpaceI.H
+++ b/src/OpenFOAM/primitives/MatrixSpace/MatrixSpaceI.H
@@ -388,7 +388,17 @@ Foam::MatrixSpace<Form, Cmpt, Mrows, Ncols>::
 Block<SubTensor, BRowStart, BColStart>::
 operator()() const
 {
-    return *this;
+    SubTensor st;
+
+    for (direction i=0; i<SubTensor::mRows; ++i)
+    {
+        for (direction j=0; j<SubTensor::nCols; ++j)
+        {
+            st[i*SubTensor::nCols + j] = operator()(i, j);
+        }
+    }
+
+    return st;
 }