public override object Evaluate(NodeEvaluationContext evaluationContext)
{
var value = Node.Evaluate(evaluationContext);
if (value == DependencyProperty.UnsetValue)
{
return DependencyProperty.UnsetValue;
}
var nodeValueType = GetNodeValueType(value);
switch (nodeValueType)
{
case NodeValueType.Byte:
return -1 * (byte)value;
case NodeValueType.Int16:
return -1 * (short)value;
case NodeValueType.Int32:
return -1 * (int)value;
case NodeValueType.Int64:
return -1 * (long)value;
case NodeValueType.Single:
return -1 * (float)value;
case NodeValueType.Double:
return -1 * (double)value;
case NodeValueType.Decimal:
return -1 * (decimal)value;
}
throw new ParseException("Operator '~' cannot be applied to operand of type '{0}'.".FormatArgs(nodeValueType));
//throw exceptionHelper.Resolve("CannotNegateValue", nodeValueType);
}
public override object Evaluate(NodeEvaluationContext evaluationContext)
{
var value = Node.Evaluate(evaluationContext);
if (value == DependencyProperty.UnsetValue)
{
return DependencyProperty.UnsetValue;
}
var nodeValueType = GetNodeValueType(value);
if (!Node.IsIntegralNodeValueType(nodeValueType))
throw new ParseException("Operator '~' cannot be applied to operand of type '{0}'.".FormatArgs(nodeValueType));
//exceptionHelper.ResolveAndThrowIf(!Node.IsIntegralNodeValueType(nodeValueType), "NotIntegralType", nodeValueType);
switch (nodeValueType)
{
case NodeValueType.Byte:
return ~((byte)value);
case NodeValueType.Int16:
return ~((short)value);
case NodeValueType.Int32:
return ~((int)value);
case NodeValueType.Int64:
return ~((long)value);
}
Debug.Assert(false);
return null;
}
public override object Evaluate(NodeEvaluationContext evaluationContext)
{
Debug.Assert(evaluationContext != null);
if (!evaluationContext.HasArgument(this.index))
throw new ParseException("No argument with index {0} has been supplied.".FormatArgs(this.index));
//exceptionHelper.ResolveAndThrowIf(!evaluationContext.HasArgument(this.index), "ArgumentNotFound", this.index);
// variable values are passed inside the context for each evaluation
return evaluationContext.GetArgument(this.index);
}
public override sealed object Evaluate(NodeEvaluationContext evaluationContext)
{
var leftNodeValue = LeftNode.Evaluate(evaluationContext);
if (leftNodeValue == DependencyProperty.UnsetValue)
{
return DependencyProperty.UnsetValue;
}
var leftNodeValueType = GetNodeValueType(leftNodeValue);
if (leftNodeValueType == NodeValueType.Boolean)
{
// give base a chance to yield a result without evaluating the right node
var result = this.DetermineResultPreRightEvaluation((bool)leftNodeValue);
if (result.HasValue)
{
return result.Value;
}
}
var rightNodeValue = RightNode.Evaluate(evaluationContext);
if (rightNodeValue == DependencyProperty.UnsetValue)
{
return DependencyProperty.UnsetValue;
}
var rightNodeValueType = GetNodeValueType(rightNodeValue);
if (leftNodeValueType != NodeValueType.Boolean || rightNodeValueType != NodeValueType.Boolean)
throw new ParseException("Operator '{0}' cannot be applied to operands of type '{1}' and '{2}' because at least one is non-boolean.".FormatArgs(this.OperatorSymbols, leftNodeValueType, rightNodeValueType));
//exceptionHelper.ResolveAndThrowIf(leftNodeValueType != NodeValueType.Boolean || rightNodeValueType != NodeValueType.Boolean, "OperandsNotBoolean", this.OperatorSymbols, leftNodeValueType, rightNodeValueType);
return this.DetermineResultPostRightEvaluation((bool)leftNodeValue, (bool)rightNodeValue);
}
public override object Evaluate(NodeEvaluationContext evaluationContext)
{
var firstNodeValue = this.FirstNode.Evaluate(evaluationContext);
if (firstNodeValue == DependencyProperty.UnsetValue)
{
return DependencyProperty.UnsetValue;
}
var firstNodeValueType = GetNodeValueType(firstNodeValue);
if (firstNodeValueType != NodeValueType.Boolean)
throw new ParseException("Operator '{0}' requires that the first node be of type Boolean, but it is of type '{1}'.".FormatArgs(this.OperatorSymbols, firstNodeValueType));
//exceptionHelper.ResolveAndThrowIf(firstNodeValueType != NodeValueType.Boolean, "FirstNodeMustBeBoolean", this.OperatorSymbols, firstNodeValueType);
if ((bool)firstNodeValue)
{
return this.SecondNode.Evaluate(evaluationContext);
}
else
{
return this.ThirdNode.Evaluate(evaluationContext);
}
}
public abstract object Evaluate(NodeEvaluationContext evaluationContext);
