# HG changeset patch
# User jwe
# Date 845398228 0
# Node ID 367485171742eff5e77eff15170f29ca9f76325e
# Parent  47e5f57fb4bd4d936fe4466e9b12a2beee97a9e1
[project @ 1996-10-15 16:50:27 by jwe]

diff -r 47e5f57fb4bd -r 367485171742 src/ov-base.h
--- a/src/ov-base.h	Tue Oct 15 16:44:26 1996 +0000
+++ b/src/ov-base.h	Tue Oct 15 16:50:28 1996 +0000
@@ -67,8 +67,11 @@
   void operator delete (void *p, size_t size);
 #endif
 
-  numeric_conv_fcn numeric_conversion_function (void) const
-    { return (numeric_conv_fcn) 0; }
+  type_conv_fcn numeric_conversion_function (void) const
+    { return (type_conv_fcn) 0; }
+
+  octave_value *try_narrowing_conversion (void)
+    { return (octave_value *) 0; }
 
   octave_value index (const octave_value_list& idx) const;
 
diff -r 47e5f57fb4bd -r 367485171742 src/ov-complex.cc
--- a/src/ov-complex.cc	Tue Oct 15 16:44:26 1996 +0000
+++ b/src/ov-complex.cc	Tue Oct 15 16:50:28 1996 +0000
@@ -31,7 +31,9 @@
 #include "lo-ieee.h"
 
 #include "oct-obj.h"
+#include "ops.h"
 #include "ov-complex.h"
+#include "ov-scalar.h"
 #include "gripes.h"
 #include "pr-output.h"
 
@@ -39,6 +41,17 @@
 
 const string octave_complex::t_name ("complex scalar");
 
+octave_value *
+octave_complex::try_narrowing_conversion (void)
+{
+  octave_value *retval = 0;
+
+  if (imag (scalar) == 0.0)
+    retval = new octave_scalar (::real (scalar));
+
+  return retval;
+}
+
 static inline bool
 valid_scalar_indices (const octave_value_list& args)
 {
diff -r 47e5f57fb4bd -r 367485171742 src/ov-complex.h
--- a/src/ov-complex.h	Tue Oct 15 16:44:26 1996 +0000
+++ b/src/ov-complex.h	Tue Oct 15 16:50:28 1996 +0000
@@ -70,6 +70,8 @@
   void operator delete (void *p, size_t size);
 #endif
 
+  octave_value *try_narrowing_conversion (void);
+
   octave_value index (const octave_value_list& idx) const;
 
   int rows (void) const { return 1; }
diff -r 47e5f57fb4bd -r 367485171742 src/ov-cx-mat.cc
--- a/src/ov-cx-mat.cc	Tue Oct 15 16:44:26 1996 +0000
+++ b/src/ov-cx-mat.cc	Tue Oct 15 16:50:28 1996 +0000
@@ -33,7 +33,11 @@
 
 #include "gripes.h"
 #include "oct-obj.h"
+#include "ops.h"
+#include "ov-complex.h"
 #include "ov-cx-mat.h"
+#include "ov-re-mat.h"
+#include "ov-scalar.h"
 #include "pr-output.h"
 
 int octave_complex_matrix::t_id = -1;
@@ -52,7 +56,30 @@
     matrix ((pcv < 0 && Vprefer_column_vectors) || pcv
 	    ? ComplexMatrix (v) : ComplexMatrix (v.transpose ())) { }
 
-extern void assign (Array2<Complex>&, const Array2<Complex>&);
+octave_value *
+octave_complex_matrix::try_narrowing_conversion (void)
+{
+  octave_value *retval = 0;
+
+  int nr = matrix.rows ();
+  int nc = matrix.cols ();
+
+  if (nr == 1 && nc == 1)
+    {
+      Complex c = matrix (0, 0);
+
+      if (imag (c) == 0.0)
+	retval = new octave_scalar (::real (c));
+      else
+	retval = new octave_complex (c);
+    }
+  else if (nr == 0 && nc == 0)
+    retval = new octave_matrix (Matrix ());
+  else if (matrix.all_elements_are_real ())
+    retval = new octave_matrix (::real (matrix));
+
+  return retval;
+}
 
 octave_value
 octave_complex_matrix::index (const octave_value_list& idx) const
@@ -88,6 +115,8 @@
   return retval;
 }
 
+extern void assign (Array2<Complex>&, const Array2<Complex>&);
+
 void
 octave_complex_matrix::assign (const octave_value_list& idx,
 			       const ComplexMatrix& rhs)
diff -r 47e5f57fb4bd -r 367485171742 src/ov-cx-mat.h
--- a/src/ov-cx-mat.h	Tue Oct 15 16:44:26 1996 +0000
+++ b/src/ov-cx-mat.h	Tue Oct 15 16:50:28 1996 +0000
@@ -77,6 +77,8 @@
   void operator delete (void *p, size_t size);
 #endif
 
+  octave_value *try_narrowing_conversion (void);
+
   octave_value index (const octave_value_list& idx) const;
 
   void assign (const octave_value_list& idx, const ComplexMatrix& rhs);
diff -r 47e5f57fb4bd -r 367485171742 src/ov-range.cc
--- a/src/ov-range.cc	Tue Oct 15 16:44:26 1996 +0000
+++ b/src/ov-range.cc	Tue Oct 15 16:50:28 1996 +0000
@@ -35,6 +35,7 @@
 #include "ops.h"
 #include "ov-range.h"
 #include "ov-re-mat.h"
+#include "ov-scalar.h"
 #include "pr-output.h"
 
 int octave_range::t_id = -1;
@@ -49,12 +50,34 @@
   return new octave_matrix (v.matrix_value ());
 }
 
-octave_value::numeric_conv_fcn
+octave_value::type_conv_fcn
 octave_range::numeric_conversion_function (void) const
 {
   return default_numeric_conversion_function;
 }
 
+octave_value *
+octave_range::try_narrowing_conversion (void)
+{
+  octave_value *retval = 0;
+
+  switch (range.nelem ())
+    {
+    case 1:
+      retval = new octave_scalar (range.base ());
+      break;
+
+    case 0:
+      retval = new octave_matrix (Matrix ());
+      break;
+
+    default:
+      break;
+    }
+
+  return retval;
+}
+
 double
 octave_range::double_value (bool) const
 {
diff -r 47e5f57fb4bd -r 367485171742 src/ov-range.h
--- a/src/ov-range.h	Tue Oct 15 16:44:26 1996 +0000
+++ b/src/ov-range.h	Tue Oct 15 16:50:28 1996 +0000
@@ -85,7 +85,9 @@
   void operator delete (void *p, size_t size);
 #endif
 
-  numeric_conv_fcn numeric_conversion_function (void) const;
+  type_conv_fcn numeric_conversion_function (void) const;
+
+  octave_value *try_narrowing_conversion (void);
 
   idx_vector index_vector (void) const { return idx_vector (range); }
 
diff -r 47e5f57fb4bd -r 367485171742 src/ov-re-mat.cc
--- a/src/ov-re-mat.cc	Tue Oct 15 16:44:26 1996 +0000
+++ b/src/ov-re-mat.cc	Tue Oct 15 16:50:28 1996 +0000
@@ -35,6 +35,8 @@
 #include "gripes.h"
 #include "mappers.h"
 #include "oct-obj.h"
+#include "ops.h"
+#include "ov-scalar.h"
 #include "ov-re-mat.h"
 #include "pr-output.h"
 
@@ -54,6 +56,20 @@
 
 #include <iostream.h>
 
+octave_value *
+octave_matrix::try_narrowing_conversion (void)
+{
+  octave_value *retval = 0;
+
+  int nr = matrix.rows ();
+  int nc = matrix.cols ();
+
+  if (nr == 1 && nc == 1)
+    retval = new octave_scalar (matrix (0, 0));
+
+  return retval;
+}
+
 octave_value
 octave_matrix::index (const octave_value_list& idx) const
 {
diff -r 47e5f57fb4bd -r 367485171742 src/ov-re-mat.h
--- a/src/ov-re-mat.h	Tue Oct 15 16:44:26 1996 +0000
+++ b/src/ov-re-mat.h	Tue Oct 15 16:50:28 1996 +0000
@@ -77,6 +77,8 @@
   void operator delete (void *p, size_t size);
 #endif
 
+  octave_value *try_narrowing_conversion (void);
+
   octave_value index (const octave_value_list& idx) const;
 
   void assign (const octave_value_list& idx, const Matrix& rhs);
diff -r 47e5f57fb4bd -r 367485171742 src/ov.cc
--- a/src/ov.cc	Tue Oct 15 16:44:26 1996 +0000
+++ b/src/ov.cc	Tue Oct 15 16:50:28 1996 +0000
@@ -303,7 +303,7 @@
 void
 octave_value::maybe_mutate (void)
 {
-  octave_value *tmp = rep->try_narrow_conversion ();
+  octave_value *tmp = rep->try_narrowing_conversion ();
 
   if (tmp && tmp != rep)
     {
diff -r 47e5f57fb4bd -r 367485171742 src/ov.h
--- a/src/ov.h	Tue Oct 15 16:44:26 1996 +0000
+++ b/src/ov.h	Tue Oct 15 16:50:28 1996 +0000
@@ -178,8 +178,8 @@
 
   void maybe_mutate (void);
 
-  virtual octave_value *try_narrow_conversion (void)
-    { return rep->try_narrow_conversion (); }
+  virtual octave_value *try_narrowing_conversion (void)
+    { return rep->try_narrowing_conversion (); }
 
   virtual octave_value index (const octave_value_list& idx) const
     { return rep->index (idx); }