public sealed override object Evaluate(NodeEvaluationContext evaluationContext)
{
var leftNodeValue = LeftNode.Evaluate(evaluationContext);
if (leftNodeValue == DependencyProperty.UnsetValue)
{
return(DependencyProperty.UnsetValue);
}
NodeValueType 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);
}
}
object rightNodeValue = RightNode.Evaluate(evaluationContext);
if (rightNodeValue == DependencyProperty.UnsetValue)
{
return(DependencyProperty.UnsetValue);
}
NodeValueType rightNodeValueType = GetNodeValueType(rightNodeValue);
exceptionHelper.ResolveAndThrowIf(leftNodeValueType != NodeValueType.Boolean || rightNodeValueType != NodeValueType.Boolean, "OperandsNotBoolean", OperatorSymbols, leftNodeValueType, rightNodeValueType);
return(this.DetermineResultPostRightEvaluation((bool)leftNodeValue, (bool)rightNodeValue));
}
public override object Evaluate(NodeEvaluationContext evaluationContext)
{
var value = Node.Evaluate(evaluationContext);
if (value == DependencyProperty.UnsetValue)
{
return(DependencyProperty.UnsetValue);
}
var nodeValueType = GetNodeValueType(value);
exceptionHelper.ResolveAndThrowIf(!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);
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 object Evaluate(NodeEvaluationContext evaluationContext)
{
var value = Node.Evaluate(evaluationContext);
if (value == DependencyProperty.UnsetValue)
{
return(DependencyProperty.UnsetValue);
}
var nodeValueType = GetNodeValueType(value);
exceptionHelper.ResolveAndThrowIf(nodeValueType != NodeValueType.Boolean, "NotBooleanType", nodeValueType);
return(!((bool)value));
}
public override object Evaluate(NodeEvaluationContext evaluationContext)
{
var value = Node.Evaluate(evaluationContext);
if (value == DependencyProperty.UnsetValue)
{
return(DependencyProperty.UnsetValue);
}
var nodeValueType = GetNodeValueType(value);
var canCast = (IsNumericalNodeValueType(nodeValueType) && IsNumericalNodeValueType(this.targetType)) ||
(nodeValueType == NodeValueType.Boolean && this.targetType == NodeValueType.Boolean) ||
(nodeValueType == NodeValueType.String && this.targetType == NodeValueType.String);
exceptionHelper.ResolveAndThrowIf(!canCast, "CannotCast", nodeValueType, this.targetType);
switch (nodeValueType)
{
case NodeValueType.Boolean:
return(this.Cast((bool)value));
case NodeValueType.String:
return(this.Cast(value as string));
case NodeValueType.Byte:
return(this.Cast((byte)value));
case NodeValueType.Int16:
return(this.Cast((short)value));
case NodeValueType.Int32:
return(this.Cast((int)value));
case NodeValueType.Int64:
return(this.Cast((long)value));
case NodeValueType.Single:
return(this.Cast((float)value));
case NodeValueType.Double:
return(this.Cast((double)value));
case NodeValueType.Decimal:
return(this.Cast((decimal)value));
}
Debug.Assert(false);
return(null);
}
public override object Evaluate(NodeEvaluationContext evaluationContext)
{
var leftNodeValue = LeftNode.Evaluate(evaluationContext);
if (leftNodeValue == DependencyProperty.UnsetValue)
{
return(DependencyProperty.UnsetValue);
}
var rightNodeValue = RightNode.Evaluate(evaluationContext);
if (rightNodeValue == DependencyProperty.UnsetValue)
{
return(DependencyProperty.UnsetValue);
}
var leftNodeValueType = GetNodeValueType(leftNodeValue);
var rightNodeValueType = GetNodeValueType(rightNodeValue);
// right operand must always be Int32
exceptionHelper.ResolveAndThrowIf(!IsNumericalNodeValueType(leftNodeValueType) || rightNodeValueType != NodeValueType.Int32, "NodeValuesNotSupportedTypes", OperatorSymbols, leftNodeValueType, rightNodeValueType);
switch (leftNodeValueType)
{
case NodeValueType.Byte:
return(this.DoByte((byte)leftNodeValue, (int)rightNodeValue));
case NodeValueType.Int16:
return(this.DoInt16((short)leftNodeValue, (int)rightNodeValue));
case NodeValueType.Int32:
return(this.DoInt32((int)leftNodeValue, (int)rightNodeValue));
case NodeValueType.Int64:
return(this.DoInt64((long)leftNodeValue, (int)rightNodeValue));
}
Debug.Assert(false);
return(null);
}
public override object Evaluate(NodeEvaluationContext evaluationContext)
{
var firstNodeValue = this.FirstNode.Evaluate(evaluationContext);
if (firstNodeValue == DependencyProperty.UnsetValue)
{
return(DependencyProperty.UnsetValue);
}
var firstNodeValueType = GetNodeValueType(firstNodeValue);
exceptionHelper.ResolveAndThrowIf(firstNodeValueType != NodeValueType.Boolean, "FirstNodeMustBeBoolean", this.OperatorSymbols, firstNodeValueType);
if ((bool)firstNodeValue)
{
return(this.SecondNode.Evaluate(evaluationContext));
}
else
{
return(this.ThirdNode.Evaluate(evaluationContext));
}
}
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 exceptionHelper.Resolve("CannotNegateValue", nodeValueType);
}
public sealed override object Evaluate(NodeEvaluationContext evaluationContext)
{
var leftNodeValue = LeftNode.Evaluate(evaluationContext);
var rightNodeValue = RightNode.Evaluate(evaluationContext);
if (leftNodeValue == DependencyProperty.UnsetValue || rightNodeValue == DependencyProperty.UnsetValue)
{
return(DependencyProperty.UnsetValue);
}
var leftNodeValueType = GetNodeValueType(leftNodeValue);
var rightNodeValueType = GetNodeValueType(rightNodeValue);
// determine the type to which we will need to widen any narrower value
var maxNodeValueType = (NodeValueType)Math.Max((int)leftNodeValueType, (int)rightNodeValueType);
// we have to convert rather than just cast because the value is boxed
var convertibleLeftNodeValue = leftNodeValue as IConvertible;
var convertibleRightNodeValue = rightNodeValue as IConvertible;
Debug.Assert(convertibleLeftNodeValue != null || maxNodeValueType == NodeValueType.String);
Debug.Assert(convertibleRightNodeValue != null || maxNodeValueType == NodeValueType.String);
var succeeded = false;
object result = null;
switch (maxNodeValueType)
{
case NodeValueType.String:
succeeded = this.DoString(convertibleLeftNodeValue == null ? null : convertibleLeftNodeValue.ToString(null), convertibleRightNodeValue == null ? null : convertibleRightNodeValue.ToString(null), out result);
break;
case NodeValueType.Boolean:
succeeded = this.DoBoolean(convertibleLeftNodeValue.ToBoolean(null), convertibleRightNodeValue.ToBoolean(null), out result);
break;
case NodeValueType.Byte:
succeeded = this.DoByte(convertibleLeftNodeValue.ToByte(null), convertibleRightNodeValue.ToByte(null), out result);
break;
case NodeValueType.Int16:
succeeded = this.DoInt16(convertibleLeftNodeValue.ToInt16(null), convertibleRightNodeValue.ToInt16(null), out result);
break;
case NodeValueType.Int32:
succeeded = this.DoInt32(convertibleLeftNodeValue.ToInt32(null), convertibleRightNodeValue.ToInt32(null), out result);
break;
case NodeValueType.Int64:
succeeded = this.DoInt64(convertibleLeftNodeValue.ToInt64(null), convertibleRightNodeValue.ToInt64(null), out result);
break;
case NodeValueType.Single:
succeeded = this.DoSingle(convertibleLeftNodeValue.ToSingle(null), convertibleRightNodeValue.ToSingle(null), out result);
break;
case NodeValueType.Double:
succeeded = this.DoDouble(convertibleLeftNodeValue.ToDouble(null), convertibleRightNodeValue.ToDouble(null), out result);
break;
case NodeValueType.Decimal:
succeeded = this.DoDecimal(convertibleLeftNodeValue.ToDecimal(null), convertibleRightNodeValue.ToDecimal(null), out result);
break;
case NodeValueType.ValueType:
succeeded = this.DoValueType(leftNodeValue, rightNodeValue, out result);
break;
case NodeValueType.ReferenceType:
succeeded = this.DoReferenceType(leftNodeValue, rightNodeValue, out result);
break;
}
exceptionHelper.ResolveAndThrowIf(!succeeded, "OperatorNotSupportedWithOperands", OperatorSymbols, leftNodeValueType, rightNodeValueType);
return(result);
}
public override object Evaluate(NodeEvaluationContext evaluationContext)
{
return(this.value);
}
public abstract object Evaluate(NodeEvaluationContext evaluationContext);