* Insert date.

[ginac.git] / ginac / add.cpp

diff --git a/ginac/add.cpp b/ginac/add.cpp
index 279933d3ecb3f907e1940e4ebeee83357aefb0c1..821649d245b7e443f7de479fd05a2d7d079bd2ee 100644 (file)
--- a/ginac/add.cpp
+++ b/ginac/add.cpp
@@ -3,7 +3,7 @@
  *  Implementation of GiNaC's sums of expressions. */
 
 /*
- *  GiNaC Copyright (C) 1999-2001 Johannes Gutenberg University Mainz, Germany
+ *  GiNaC Copyright (C) 1999-2002 Johannes Gutenberg University Mainz, Germany
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
@@ -121,16 +121,16 @@ void add::print(const print_context & c, unsigned level) const
                while (it != itend) {
                
                        // If the coefficient is -1, it is replaced by a single minus sign
-                       if (it->coeff.compare(_num1) == 0) {
+                       if (it->coeff.is_equal(_ex1)) {
                                it->rest.print(c, precedence());
-                       } else if (it->coeff.compare(_num_1) == 0) {
+                       } else if (it->coeff.is_equal(_ex_1)) {
                                c.s << "-";
                                it->rest.print(c, precedence());
-                       } else if (ex_to<numeric>(it->coeff).numer().compare(_num1) == 0) {
+                       } else if (ex_to<numeric>(it->coeff).numer().is_equal(_num1)) {
                                it->rest.print(c, precedence());
                                c.s << "/";
                                ex_to<numeric>(it->coeff).denom().print(c, precedence());
-                       } else if (ex_to<numeric>(it->coeff).numer().compare(_num_1) == 0) {
+                       } else if (ex_to<numeric>(it->coeff).numer().is_equal(_num_1)) {
                                c.s << "-";
                                it->rest.print(c, precedence());
                                c.s << "/";
@@ -143,7 +143,7 @@ void add::print(const print_context & c, unsigned level) const
                
                        // Separator is "+", except if the following expression would have a leading minus sign
                        ++it;
-                       if (it != itend && !(it->coeff.compare(_num0) < 0 || (it->coeff.compare(_num1) == 0 && is_exactly_a<numeric>(it->rest) && it->rest.compare(_num0) < 0)))
+                       if (it != itend && !(it->coeff.info(info_flags::negative) || (it->coeff.is_equal(_num1) && is_exactly_a<numeric>(it->rest) && it->rest.info(info_flags::negative))))
                                c.s << "+";
                }
        
@@ -159,10 +159,8 @@ void add::print(const print_context & c, unsigned level) const
        } else if (is_a<print_python_repr>(c)) {
 
                c.s << class_name() << '(';
-               unsigned end = nops();
-               if (end)
-                       op(0).print(c);
-               for (unsigned i=1; i<end; ++i) {
+               op(0).print(c);
+               for (unsigned i=1; i<nops(); ++i) {
                        c.s << ',';
                        op(i).print(c);
                }