/// <summary>
/// If the value is an operand, returns it, otherwise creates the right kind of operand
/// </summary>
/// <param name="value"></param>
/// <returns></returns>
public static IOperand EnsureOperand(IConvertible value)
{
if (value is IOperand)
{
return((IOperand)value);
}
else if (value is string)
{
//TODO: parse quotes and return a string liteeral if need be
return(Equations.CreateVariable((string)value));
}
else
{
return(Equations.CreateLiteral(value));
}
}
public void Clone_()
{
//var variable = Equations.CreateVariable<int>("x");
var variable = Equations.CreateVariable("x");
var lit = Equations.CreateLiteral <int>("120");
//var clause = Equations.CreateClause<int>(lit, variable, "-");
var clause = new Difference(lit, variable);
var exp = Equations.CreateEquation <int>(clause);
exp.SetVariable("x", 5);
Assert.AreEqual(115, exp.Value, "Built an equation by hand and it worked");
//clause.Operator = Equations.CreateOperator("*");
//Assert.AreEqual(600, exp.Value, "Built an equation by hand and it worked");
var litClone = lit.Clone();
Assert.AreEqual(120, litClone.Value, "Literal cloned ok");
var clauseClone = clause.Clone();
var cloneVars = clauseClone.Variables.FirstOrDefault();
Assert.IsTrue(cloneVars != null, "Clone has variables");
// 120 - x + 3
clauseClone.AddOperand(3);
var newExp = Equations.CreateEquation <int>(clauseClone);
newExp.SetVariable("x", 2);
Assert.AreEqual(121, newExp.Value, "Cloned & chained worked");
Assert.AreEqual(115, exp.Value, "Original unaffected");
var exp3 = Equations.CreateEquation <double>("10/(2*x+3-y*1.5*(3+5))+22.5");
Assert.AreEqual(10 / (2 * 5 + 3 - 3 * 1.5 * (3 + 5)) + 22.5, exp3.GetValue(5, 3), "long equation");
}
