/// <summary>
/// A private helper method to check the type of an IExpressionNode.
/// </summary>
/// <returns>An IProperty of the operation's type.</returns>
/// <param name="node">Node.</param>
private IProperty VisitOperationNode(IExpressionNode node)
{
// evaluate the IExpressionNode's expressions
IProperty evaluationType = getEvaluation(node.GetExpressions());
// check that the operation is legit for this type
if (SemanticAnalysisConstants.LEGIT_OPERATIONS.ContainsKey(evaluationType.GetTokenType()) &&
SemanticAnalysisConstants.LEGIT_OPERATIONS [evaluationType.GetTokenType()].ContainsKey(node.Operation))
{
// if it's a logical operation, never mind the original type, the evaluation type is boolean
if (SemanticAnalysisConstants.LOGICAL_OPERATIONS.ContainsKey(node.Operation))
{
return(new BooleanProperty(SemanticAnalysisConstants.DEFAULT_BOOL_VALUE));
}
return(evaluationType);
}
return(new ErrorProperty());
}