* Minor optimization: swap instead of assign.

diff --git a/ginac/matrix.cpp b/ginac/matrix.cpp
index e24f644741d6be1745c610020d314b5c338cf7ac..4c25d12bce11caf2266b9c4c6ccade7a6a37a659 100644 (file)
--- a/ginac/matrix.cpp
+++ b/ginac/matrix.cpp
@@ -1205,7 +1205,7 @@ ex matrix::determinant_minor() const
                                        Pkey[j] = Pkey[j-1]+1;
                } while(fc);
                // next column, so change the role of A and B:
                                        Pkey[j] = Pkey[j-1]+1;
                } while(fc);
                // next column, so change the role of A and B:

-               A = B;
+               A.swap(B);

                B.clear();
        }
        
                B.clear();
        }