Added to possibility to compile unit tests at maximum warning level.

Silenced (amongst others) many conversion related warnings.

unsupported/Eigen/FFT

@@ -160,7 +160,7 @@ class FFT
         dst.resize( (src.size()>>1)+1);
       else
         dst.resize(src.size());
-      fwd(&dst[0],&src[0],src.size());
+      fwd(&dst[0],&src[0],static_cast<int>(src.size()));
     }
 
     template<typename InputDerived, typename ComplexDerived>
@@ -224,7 +224,7 @@ class FFT
         dst.resize( 2*(src.size()-1) );
       else
         dst.resize( src.size() );
-      inv( &dst[0],&src[0],dst.size() );
+      inv( &dst[0],&src[0],static_cast<int>(dst.size()) );
     }
 
     // TODO: multi-dimensional FFTs

unsupported/Eigen/src/BVH/BVAlgorithms.h

@@ -74,6 +74,8 @@ struct ei_intersector_helper1
   bool intersectObject(const Object1 &obj) { return intersector.intersectObjectObject(obj, stored); }
   Object2 stored;
   Intersector &intersector;
+private:
+  ei_intersector_helper1& operator=(const ei_intersector_helper1&);
 };
 
 template<typename Volume2, typename Object2, typename Object1, typename Intersector>
@@ -216,6 +218,8 @@ struct ei_minimizer_helper2
   Scalar minimumOnObject(const Object2 &obj) { return minimizer.minimumOnObjectObject(stored, obj); }
   Object1 stored;
   Minimizer &minimizer;
+private:
+  ei_minimizer_helper2& operator=(const ei_minimizer_helper2&);
 };
 
 /**  Given two BVH's, runs the query on their cartesian product encapsulated by \a minimizer.

unsupported/Eigen/src/BVH/KdBVH.h

@@ -107,7 +107,7 @@ public:
     children.clear();
 
     objects.insert(objects.end(), begin, end);
-    int n = objects.size();
+    int n = static_cast<int>(objects.size());
 
     if(n < 2)
       return; //if we have at most one object, we don't need any internal nodes
@@ -149,7 +149,7 @@ public:
       return;
     }
 
-    int numBoxes = boxes.size();
+    int numBoxes = static_cast<int>(boxes.size());
 
     int idx = index * 2;
     if(children[idx + 1] < numBoxes) { //second index is always bigger

unsupported/Eigen/src/FFT/ei_kissfft_impl.h

@@ -247,7 +247,7 @@ struct ei_kiss_cpx_fft
       int u,k,q1,q;
       Complex * twiddles = &m_twiddles[0];
       Complex t;
-      int Norig = m_twiddles.size();
+      int Norig = static_cast<int>(m_twiddles.size());
       Complex * scratchbuf = &m_scratchBuf[0];
 
       for ( u=0; u<m; ++u ) {
@@ -262,7 +262,7 @@ struct ei_kiss_cpx_fft
           int twidx=0;
           Fout[ k ] = scratchbuf[0];
           for (q=1;q<p;++q ) {
-            twidx += fstride * k;
+            twidx += static_cast<int>(fstride) * k;
             if (twidx>=Norig) twidx-=Norig;
             t=scratchbuf[q] * twiddles[twidx];
             Fout[ k ] += t;

unsupported/Eigen/src/MatrixFunctions/MatrixExponential.h

@@ -292,7 +292,7 @@ void MatrixExponential<MatrixType>::computeUV(float)
   } else {
     const float maxnorm = 3.925724783138660f;
     m_squarings = std::max(0, (int)ceil(log2(m_l1norm / maxnorm)));
-    MatrixType A = *m_M / std::pow(Scalar(2), Scalar(m_squarings));
+    MatrixType A = *m_M / std::pow(Scalar(2), Scalar(static_cast<RealScalar>(m_squarings)));
     pade7(A);
   }
 }

unsupported/test/Complex.cpp

@@ -40,7 +40,7 @@ template <typename T>
 void take_std( std::complex<T> * dst, int n )
 {
     for (int i=0;i<n;++i)
-        dst[i] = std::complex<T>(i,i);
+        dst[i] = std::complex<T>(static_cast<float>(i),static_cast<float>(i));
     cout << dst[n-1] << endl;
 }
 

unsupported/test/FFT.cpp

@@ -46,10 +46,10 @@ complex<long double>  promote(long double x) { return complex<long double>( x);
         long double difpower=0;
         cerr <<"idx\ttruth\t\tvalue\t|dif|=\n";
         long double pi = acos((long double)-1);
-        for (size_t k0=0;k0<size_t(fftbuf.size());++k0) {
+        for (int k0=0;k0<fftbuf.size();++k0) {
             complex<long double> acc = 0;
             long double phinc = -2.*k0* pi / timebuf.size();
-            for (size_t k1=0;k1<size_t(timebuf.size());++k1) {
+            for (int k1=0;k1<timebuf.size();++k1) {
                 acc +=  promote( timebuf[k1] ) * exp( complex<long double>(0,k1*phinc) );
             }
             totalpower += norm(acc);
@@ -67,8 +67,8 @@ complex<long double>  promote(long double x) { return complex<long double>( x);
     {
         long double totalpower=0;
         long double difpower=0;
-        size_t n = min( buf1.size(),buf2.size() );
-        for (size_t k=0;k<n;++k) {
+        int n = min( buf1.size(),buf2.size() );
+        for (int k=0;k<n;++k) {
             totalpower += (norm( buf1[k] ) + norm(buf2[k]) )/2.;
             difpower += norm(buf1[k] - buf2[k]);
         }