From e59b38abef4dec8e37037284760607d3e108958f Mon Sep 17 00:00:00 2001
From: Christoph Hertzberg <chtz@informatik.uni-bremen.de>
Date: Wed, 13 Nov 2013 16:47:02 +0100
Subject: Implement boolean reductions for zero-sized objects

---
 test/zerosized.cpp | 31 ++++++++++++++++++++++++++++---
 1 file changed, 28 insertions(+), 3 deletions(-)

(limited to 'test/zerosized.cpp')

diff --git a/test/zerosized.cpp b/test/zerosized.cpp
index 6905e584e..da7dd0481 100644
--- a/test/zerosized.cpp
+++ b/test/zerosized.cpp
@@ -9,12 +9,26 @@
 
 #include "main.h"
 
+
+template<typename MatrixType> void zeroReduction(const MatrixType& m) {
+  // Reductions that must hold for zero sized objects
+  VERIFY(m.all());
+  VERIFY(!m.any());
+  VERIFY(m.prod()==1);
+  VERIFY(m.sum()==0);
+  VERIFY(m.count()==0);
+  VERIFY(m.allFinite());
+  VERIFY(!m.hasNaN());
+}
+
+
 template<typename MatrixType> void zeroSizedMatrix()
 {
   MatrixType t1;
 
-  if (MatrixType::SizeAtCompileTime == Dynamic)
+  if (MatrixType::SizeAtCompileTime == Dynamic || MatrixType::SizeAtCompileTime == 0)
   {
+    zeroReduction(t1);
     if (MatrixType::RowsAtCompileTime == Dynamic)
       VERIFY(t1.rows() == 0);
     if (MatrixType::ColsAtCompileTime == Dynamic)
@@ -22,9 +36,13 @@ template<typename MatrixType> void zeroSizedMatrix()
 
     if (MatrixType::RowsAtCompileTime == Dynamic && MatrixType::ColsAtCompileTime == Dynamic)
     {
+
       MatrixType t2(0, 0);
       VERIFY(t2.rows() == 0);
       VERIFY(t2.cols() == 0);
+
+      zeroReduction(t2);
+      VERIFY(t1==t2);
     }
   }
 }
@@ -33,11 +51,15 @@ template<typename VectorType> void zeroSizedVector()
 {
   VectorType t1;
 
-  if (VectorType::SizeAtCompileTime == Dynamic)
+  if (VectorType::SizeAtCompileTime == Dynamic || VectorType::SizeAtCompileTime==0)
   {
+    zeroReduction(t1);
     VERIFY(t1.size() == 0);
     VectorType t2(DenseIndex(0)); // DenseIndex disambiguates with 0-the-null-pointer (error with gcc 4.4 and MSVC8)
     VERIFY(t2.size() == 0);
+    zeroReduction(t2);
+
+    VERIFY(t1==t2);
   }
 }
 
@@ -51,9 +73,12 @@ void test_zerosized()
   zeroSizedMatrix<Matrix<float, Dynamic, 0, 0, 0, 0> >();
   zeroSizedMatrix<Matrix<float, 0, Dynamic, 0, 0, 0> >();
   zeroSizedMatrix<Matrix<float, Dynamic, Dynamic, 0, 0, 0> >();
-  
+  zeroSizedMatrix<Matrix<float, 0, 4> >();
+  zeroSizedMatrix<Matrix<float, 4, 0> >();
+
   zeroSizedVector<Vector2d>();
   zeroSizedVector<Vector3i>();
   zeroSizedVector<VectorXf>();
   zeroSizedVector<Matrix<float, 0, 1> >();
+  zeroSizedVector<Matrix<float, 1, 0> >();
 }
-- 
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