[boost] ublas: matrix< double > = matrix< complex >

From: Toon Knapen (toon.knapen_at_[hidden])
Date: 2002-04-24 14:21:52

I made following change to numerics/ublas/functional.h to be able to assign 
matrices of complex to a matrix of reals.

Joerg, would you mind integrating it in the CVS ?

Index: functional.h
===================================================================
RCS file: /cvsroot/boost/boost/boost/numeric/ublas/Attic/functional.h,v
retrieving revision 1.1.2.10
diff -u -r1.1.2.10 functional.h
--- functional.h        26 Mar 2002 10:11:26 -0000      1.1.2.10
+++ functional.h        24 Apr 2002 13:16:39 -0000
@@ -160,6 +160,16 @@
     struct assign_tag {};
     struct computed_assign_tag {};

+    template < typename T1, typename T2 >
+    inline
+    void convert_and_assign(T1& target, const T2& source)
+    { target = source ; }
+
+    template <>
+    inline
+    void convert_and_assign(double& target, const std::complex< double >& 
source)
+    { target = source.real() ; }
+
     template<class T1, class T2>
     struct scalar_assign:
         public scalar_binary_functor<T1, T2> {
@@ -169,7 +179,7 @@

         NUMERICS_INLINE
         void operator () (argument1_type &t1, const argument2_type &t2) 
const {
-            t1 = t2;
+            convert_and_assign(t1,t2);
         }
     };
     template<class T1, class T2>