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changeset 9887:e3bd1569a68c

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in-place operation of unary ops on temporary expressions
author Jaroslav Hajek <highegg@gmail.com>
date Sun, 29 Nov 2009 21:21:42 +0100
parents cddd5c3d5f04
children cee6c63cff32
files src/ChangeLog src/pt-unop.cc
diffstat 2 files changed, 11 insertions(+), 1 deletions(-) [+]
line wrap: on
line diff
--- a/src/ChangeLog	Sun Nov 29 07:51:15 2009 +0100
+++ b/src/ChangeLog	Sun Nov 29 21:21:42 2009 +0100
@@ -1,3 +1,8 @@
+2009-11-29  Jaroslav Hajek  <highegg@gmail.com>
+
+	* pt-unop.cc (tree_prefix_expression::rvalue1): Try to use
+	octave_value::do_non_const_unary_op.
+
 2009-11-29  Jaroslav Hajek  <highegg@gmail.com>
 
 	* DLD-FUNCTIONS/urlwrite.cc (curl_handle::init): Use CURLOPT_USERPWD
--- a/src/pt-unop.cc	Sun Nov 29 07:51:15 2009 +0100
+++ b/src/pt-unop.cc	Sun Nov 29 21:21:42 2009 +0100
@@ -89,7 +89,12 @@
 
 	  if (! error_state && val.is_defined ())
 	    {
-	      retval = ::do_unary_op (etype, val);
+              // Attempt to do the operation in-place if it is unshared 
+              // (a temporary expression).
+              if (val.get_count () == 1)
+                retval = val.do_non_const_unary_op (etype);
+              else
+                retval = ::do_unary_op (etype, val);
 
 	      if (error_state)
 		retval = octave_value ();