public override int VisitOperand([NotNull] OperandContext context)
{
ITerminalNode digit = context.DIGIT();
return(digit != null
? int.Parse(digit.GetText())
: HandleGroup(context.operand(), context.OPERATOR()));
}
/// <summary>
/// Visit a parse tree produced by <see cref="CalculatorParser.operand"/>.
/// <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 VisitOperand([NotNull] CalculatorParser.OperandContext context)
{
return(VisitChildren(context));
}
