public void Visit(Expression node)
{
}
public void Visit(Expression node)
{
node.Child.Accept(this);
}
public void Visit(Expression node)
{
//if expression is literal
if (node.Child == null)
{
throw new Exception("Expression should have one and only one child");
}
node.Child.Accept(this);
ReferenceTables.SetValue(node, ReferenceTables.GetValue(node.Child));
}
public StatementUnit(Identifier identifier, Expression expression, string unitText, IStaticReturnType dataType, SourceLocation sourceLocation)
: base(identifier, dataType, unitText, sourceLocation)
{
Expression = expression;
}
private ITerminalWrapper GetValue(Expression key)
{
if (key.Child is IStaticReturnType)
{
TerminalWrapperFactory terminalWrapperFactory = new TerminalWrapperFactory();
return terminalWrapperFactory.CreateWrapper(key.Child as IStaticReturnType);
}
return GetValue(key.Child);
}
public void Visit(Expression node)
{
}
public override void ExitExpression(QLParser.ExpressionContext context)
{
IList<ElementBase> children = GetChildren();
Expression expression;
if (children.Count() == 1)
{
expression = new Expression(children[0], SourceLocation.CreateFor(context));
}
else if (children.Count() == 3)
{
ElementBase leftNode = children[0];
BinaryTreeElementBase operatorNode = (BinaryTreeElementBase)children[1];
ElementBase rightNode = children[2];
operatorNode.Left = leftNode;
operatorNode.Right = rightNode;
expression = new Expression(operatorNode, SourceLocation.CreateFor(context));
}
else
{
_astBuilderExceptions.Add(new ParserError("Expression without a child"));
return;
}
AppendToAST(expression);
}