/// <summary>
/// Builds the specified value from the specified expression node.
/// </summary>
/// <param name="expression">The expression node.</param>
/// <returns>
/// The value.
/// </returns>
public Complex Build(Node expression)
{
switch (expression)
{
case BinaryOperatorNode bn:
switch (bn.NodeType)
{
case NodeTypes.Add: return(Build(bn.Left) + Build(bn.Right));
case NodeTypes.Subtract: return(Build(bn.Left) - Build(bn.Right));
case NodeTypes.Multiply: return(Build(bn.Left) * Build(bn.Right));
case NodeTypes.Divide: return(HelperFunctions.SafeDivide(Build(bn.Left), Build(bn.Right), FudgeFactor));
case NodeTypes.Modulo: return(Build(bn.Left).Real % Build(bn.Right).Real);
case NodeTypes.LessThan: return(Build(bn.Left).Real < Build(bn.Right).Real ? 1.0 : 0.0);
case NodeTypes.GreaterThan: return(Build(bn.Left).Real > Build(bn.Right).Real ? 1.0 : 0.0);
case NodeTypes.LessThanOrEqual: return(Build(bn.Left).Real <= Build(bn.Right).Real ? 1.0 : 0.0);
case NodeTypes.GreaterThanOrEqual: return(Build(bn.Left).Real >= Build(bn.Right).Real ? 1.0 : 0.0);
case NodeTypes.Equals: return(HelperFunctions.Equals(Build(bn.Left), Build(bn.Right), RelativeTolerance, AbsoluteTolerance) ? 1.0 : 0.0);
case NodeTypes.NotEquals: return(HelperFunctions.Equals(Build(bn.Left), Build(bn.Right), RelativeTolerance, AbsoluteTolerance) ? 0.0 : 1.0);
case NodeTypes.And: return(Build(bn.Left).Real > 0.5 && Build(bn.Right).Real > 0.5 ? 1.0 : 0.0);
case NodeTypes.Or: return(Build(bn.Left).Real > 0.5 || Build(bn.Right).Real > 0.5 ? 1.0 : 0.0);
case NodeTypes.Xor: return(Build(bn.Left).Real > 0.5 ^ Build(bn.Right).Real > 0.5 ? 1.0 : 0.0);
case NodeTypes.Pow: return(HelperFunctions.Power(Build(bn.Left), Build(bn.Right)));
}
break;
case UnaryOperatorNode un:
switch (un.NodeType)
{
case NodeTypes.Plus: return(Build(un.Argument));
case NodeTypes.Minus: return(-Build(un.Argument));
case NodeTypes.Not: return(Build(un.Argument).Real > 0.5 ? 0.0 : 1.0);
}
break;
case TernaryOperatorNode tn:
return(Build(tn.Condition).Real > 0.5 ? Build(tn.IfTrue) : Build(tn.IfFalse));
case FunctionNode fn:
var fargs = new FunctionFoundEventArgs <Complex>(this, fn);
OnFunctionFound(fargs);
if (!fargs.Created)
{
throw new SpiceSharpException($"Could not recognized function {fn.Name}");
}
return(fargs.Result);
case ConstantNode cn:
return(cn.Literal);
case VariableNode vn:
var vargs = new VariableFoundEventArgs <Complex>(this, vn);
OnVariableFound(vargs);
if (!vargs.Created)
{
throw new SpiceSharpException($"Could not recognized variable {vn.Name}");
}
return(vargs.Result);
}
return(BuildNode(expression));
}
/// <summary> /// Called when a variable was found. /// </summary> /// <param name="args">The event arguments.</param> protected virtual void OnVariableFound(VariableFoundEventArgs <Complex> args) => VariableFound?.Invoke(this, args);
