public override SqlObject VisitUnaryScalarExpression(AntlrSqlParser.UnaryScalarExpressionContext context)
{
Contract.Requires(context != null);
// unary_operator scalar_expression
Contract.Requires(context.ChildCount == 2);
string unaryOperatorText = context.unary_operator().GetText();
if (!CstToAstVisitor.unaryOperatorKindLookup.TryGetValue(
unaryOperatorText,
out SqlUnaryScalarOperatorKind unaryOperator))
{
throw new ArgumentOutOfRangeException($"Unknown unary operator: {unaryOperatorText}.");
}
SqlScalarExpression expression = (SqlScalarExpression)this.Visit(context.scalar_expression());
return(SqlUnaryScalarExpression.Create(unaryOperator, expression));
}
/// <summary>
/// Visit a parse tree produced by the <c>UnaryScalarExpression</c>
/// labeled alternative in <see cref="AntlrSqlParser.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 VisitUnaryScalarExpression([NotNull] AntlrSqlParser.UnaryScalarExpressionContext context)
{
return(VisitChildren(context));
}