/// <summary>
/// Replace all occurrences of oldVar with expr, and update column cross indices
/// oldVar should now be a basic variable.
/// </summary>
protected /*sealed*/ void SubstituteOut(ClAbstractVariable oldVar, ClLinearExpression expr)
{
if (Trace)
{
FnEnterPrint(string.Format("SubstituteOut: {0}", oldVar, expr));
}
if (Trace)
{
TracePrint(this.ToString());
}
Set varset = (Set)_columns[oldVar];
foreach (ClAbstractVariable v in varset)
{
ClLinearExpression row = (ClLinearExpression)_rows[v];
row.SubstituteOut(oldVar, expr, v, this);
if (v.IsRestricted && row.Constant < 0.0)
{
_infeasibleRows.Add(v);
}
}
if (oldVar.IsExternal)
{
_externalRows.Add(oldVar);
_externalParametricVars.Remove(oldVar);
}
_columns.Remove(oldVar);
}
