public static bool IsQuadraticTerm(this Term term)
{
if (term == null)
{
return(false);
}
if (!term.ContainsVar())
{
return(false);
}
var cond1 = term.Op == Expression.Power;
var lst = term.Args as List <object>;
if (lst == null || lst.Count != 2)
{
return(false);
}
var isNum = LogicSharp.IsNumeric(lst[1]);
if (!isNum)
{
return(false);
}
double number;
LogicSharp.IsDouble(lst[1], out number);
var cond2 = number.Equals(2.0);
return(cond1 && cond2);
}
public void Test_containVar()
{
var variable = new Var('x');
var term = new Term(Expression.Add, new Tuple<object, object>(variable, 2));
Assert.True(term.ContainsVar(variable));
var term2 = new Term(Expression.Add, new Tuple<object, object>(term, 1.0));
Assert.True(term2.ContainsVar(variable));
}
