private object VisitCast([NotNull] KoraliumParser.Scalar_expressionContext context)
{
var innerScalar = Visit(context.casted) as ScalarExpression;
var toType = context.castedidentifier.Text.ToLower();
return(new CastExpression()
{
ScalarExpression = innerScalar,
ToType = toType
});
}
/// <summary>
/// Exit a parse tree produced by <see cref="KoraliumParser.scalar_expression"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitScalar_expression([NotNull] KoraliumParser.Scalar_expressionContext context)
{
}
/// <summary>
/// Visit a parse tree produced by <see cref="KoraliumParser.scalar_expression"/>.
/// <para>
/// The default implementation returns the result of calling <see cref="AbstractParseTreeVisitor{Result}.VisitChildren(IRuleNode)"/>
/// on <paramref name="context"/>.
/// </para>
/// </summary>
/// <param name="context">The parse tree.</param>
/// <return>The visitor result.</return>
public virtual Result VisitScalar_expression([NotNull] KoraliumParser.Scalar_expressionContext context)
{
return(VisitChildren(context));
}
public override object VisitScalar_expression([NotNull] KoraliumParser.Scalar_expressionContext context)
{
if (context.inner != null)
{
return(Visit(context.inner) as ScalarExpression);
}
if (context.casted != null)
{
return(VisitCast(context));
}
var columnReferenceNode = context.column_reference();
if (columnReferenceNode != null)
{
return(Visit(columnReferenceNode) as ScalarExpression);
}
var literalNode = context.literal_value();
if (literalNode != null)
{
return(Visit(literalNode) as ScalarExpression);
}
var functionCallNode = context.function_call();
if (functionCallNode != null)
{
return(Visit(functionCallNode) as ScalarExpression);
}
var operationTypeNode = context.binary_operation_type();
if (operationTypeNode != null)
{
var binaryOperationType = operationTypeNode.GetText();
BinaryType binaryType = BinaryType.Add;
switch (binaryOperationType)
{
case "+":
binaryType = BinaryType.Add;
break;
case "-":
binaryType = BinaryType.Subtract;
break;
case "*":
binaryType = BinaryType.Multiply;
break;
case "/":
binaryType = BinaryType.Divide;
break;
case "%":
binaryType = BinaryType.Modulo;
break;
case "&":
binaryType = BinaryType.BitwiseAnd;
break;
case "|":
binaryType = BinaryType.BitwiseOr;
break;
case "^":
binaryType = BinaryType.BitwiseXor;
break;
}
return(new BinaryExpression()
{
Left = Visit(context.left) as ScalarExpression,
Right = Visit(context.right) as ScalarExpression,
Type = binaryType
});
}
var variableReferenceNode = context.variable_reference();
if (variableReferenceNode != null)
{
return(Visit(variableReferenceNode) as VariableReference);
}
throw new NotImplementedException();
}