public override object VisitExprAnd([NotNull] MiniSQLParser.ExprAndContext context)
{
Expression left = (Expression)Visit(context.expr(0));
Expression right = (Expression)Visit(context.expr(1));
Expression obj = new Expression();
obj.LeftOperand = left;
obj.RightOperand = right;
obj.Operator = Operator.And;
// optimize expression
if (left.Operator == Operator.AtomConcreteValue &&
right.Operator == Operator.AtomConcreteValue)
{
left.ConcreteValue = obj.Calculate(null);
return(left);
}
return(obj);
}
/// <summary>
/// Exit a parse tree produced by the <c>exprAnd</c>
/// labeled alternative in <see cref="MiniSQLParser.expr"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitExprAnd([NotNull] MiniSQLParser.ExprAndContext context)
{
}
/// <summary>
/// Visit a parse tree produced by the <c>exprAnd</c>
/// labeled alternative in <see cref="MiniSQLParser.expr"/>.
/// <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 VisitExprAnd([NotNull] MiniSQLParser.ExprAndContext context)
{
return(VisitChildren(context));
}
