1.1 --- a/lemon/lp_base.h	Thu Nov 05 10:01:02 2009 +0100
     1.2 +++ b/lemon/lp_base.h	Thu Nov 05 10:23:16 2009 +0100
     1.3 @@ -943,6 +943,14 @@
     1.4      virtual int _addCol() = 0;
     1.5      virtual int _addRow() = 0;
     1.6  
     1.7 +    virtual int _addRow(Value l, ExprIterator b, ExprIterator e, Value u) {
     1.8 +      int row = _addRow();
     1.9 +      _setRowCoeffs(row, b, e);
    1.10 +      _setRowLowerBound(row, l);
    1.11 +      _setRowUpperBound(row, u);
    1.12 +      return row;
    1.13 +    }
    1.14 +
    1.15      virtual void _eraseCol(int col) = 0;
    1.16      virtual void _eraseRow(int row) = 0;
    1.17  
    1.18 @@ -1207,8 +1215,10 @@
    1.19      ///\param u is the upper bound (\ref INF means no bound)
    1.20      ///\return The created row.
    1.21      Row addRow(Value l,const Expr &e, Value u) {
    1.22 -      Row r=addRow();
    1.23 -      row(r,l,e,u);
    1.24 +      Row r;
    1.25 +      e.simplify();
    1.26 +      r._id = _addRowId(_addRow(l - *e, ExprIterator(e.comps.begin(), cols),
    1.27 +                                ExprIterator(e.comps.end(), cols), u - *e));
    1.28        return r;
    1.29      }
    1.30  
    1.31 @@ -1217,8 +1227,12 @@
    1.32      ///\param c is a linear expression (see \ref Constr)
    1.33      ///\return The created row.
    1.34      Row addRow(const Constr &c) {
    1.35 -      Row r=addRow();
    1.36 -      row(r,c);
    1.37 +      Row r;
    1.38 +      c.expr().simplify();
    1.39 +      r._id = _addRowId(_addRow(c.lowerBounded()?c.lowerBound():-INF, 
    1.40 +                                ExprIterator(c.expr().comps.begin(), cols),
    1.41 +                                ExprIterator(c.expr().comps.end(), cols),
    1.42 +                                c.upperBounded()?c.upperBound():INF));
    1.43        return r;
    1.44      }
    1.45      ///Erase a column (i.e a variable) from the LP