private StatementType AnalyseExpression(IExpressionNode node)
{
switch (node.GetNodeType())
{
case NodeType.LogicalExpression:
var logicalNode = (LogicalExpressionNode)node;
return(Analyze(logicalNode));
case NodeType.ComparisonExpression:
var comparisonNode = (ComparisonExpressionNode)node;
return(Analyze(comparisonNode));
case NodeType.ArthimetricExpression:
var arthimetric = (ArthimetricExpressionNode)node;
return(Analyze(arthimetric));
case NodeType.TextConcatination:
var textNode = (TextConcatinationNode)node;
return(Analyze(textNode));
case NodeType.Literal:
case NodeType.Identifier:
return(StatementTypeEvaluator.GetStatementType(node));
}
throw new UnknownNodeTypeException(string.Format("We don't know what to do with this node: {0}", node.GetNodeType()));
}
public ExpressionValue ParseExpressionNode(IExpressionNode node)
{
switch (node.GetNodeType())
{
case NodeType.ARTHIMETRIC_EXPRESSION:
return(ParseArthimeticNode(node as ArthimetricExpressionNode));
case NodeType.COMPARISON_EXPRESSION:
return(ParseComparisonNode(node as ComparisonExpressionNode));
case NodeType.LOGICAL_EXPRESSION:
return(ParseLogicalNode(node as LogicalExpressionNode));
case NodeType.IDENTIFIER:
return(ParseIdentifyerNode(node as IdentifierNode));
case NodeType.LITERAL:
return(ParseLiteralNode(node as LiteralNode));
default:
throw new NotImplementedException();
}
}
private bool AnalyseExpression(IExpressionNode node)
{
switch (node.GetNodeType())
{
case NodeType.LOGICAL_EXPRESSION:
case NodeType.COMPARISON_EXPRESSION:
case NodeType.ARTHIMETRIC_EXPRESSION:
var statementNode = (ExpressionNode)node;
var leftResult = AnalyseExpression(statementNode.Left);
var rightResult = AnalyseExpression(statementNode.Right);
return(leftResult == rightResult);
case NodeType.LITERAL:
return(true);
case NodeType.IDENTIFIER:
var valueNode = (IdentifierNode)node;
return(IsIdentiierInSymbolTable(valueNode));
default:
throw new UnknownNodeTypeException(string.Format("We don't know what to do with a {0} node.", node.GetNodeType()));
}
}
private StatementType AnalyseExpression(IExpressionNode node)
{
switch (node.GetNodeType())
{
case NodeType.LOGICAL_EXPRESSION:
var logicalNode = (LogicalExpressionNode)node;
return(Analyze(logicalNode));
case NodeType.COMPARISON_EXPRESSION:
var comparisonNode = (ComparisonExpressionNode)node;
return(Analyze(comparisonNode));
case NodeType.ARTHIMETRIC_EXPRESSION:
var arthimetric = (ArthimetricExpressionNode)node;
return(Analyze(arthimetric));
case NodeType.LITERAL:
case NodeType.IDENTIFIER:
return(GetStatementType(node));
}
throw new UnknownNodeTypeException(string.Format("We don't know what to do with this node: {0}", node.GetNodeType()));
}
private bool AnalyseExpression(IExpressionNode node)
{
switch (node.GetNodeType())
{
case NodeType.LogicalExpression:
case NodeType.ComparisonExpression:
case NodeType.ArthimetricExpression:
case NodeType.TextConcatination:
var statementNode = (ExpressionNode)node;
var leftResult = AnalyseExpression(statementNode.Left);
var rightResult = AnalyseExpression(statementNode.Right);
return(leftResult == rightResult);
case NodeType.Literal:
return(true);
case NodeType.Identifier:
var valueNode = (IdentifierNode)node;
return(IsIdentiierInSymbolTable(valueNode));
default:
throw new UnknownNodeTypeException(string.Format("We don't know what to do with a {0} node.", node.GetNodeType()));
}
}
