public override void EnterEquation(CalculatorParser.EquationContext context)
{
op = context.OPERATOR().GetText();
values = new List <int>();
foreach (ITerminalNode number in context.NUMBERS())
{
values.Add(int.Parse(number.GetText()));
}
}
static void Main(string[] args)
{
AntlrInputStream inputStream = new AntlrInputStream("2 + 2");
CalculatorLexer calcLexer = new CalculatorLexer(inputStream);
CommonTokenStream commonTokenStream = new CommonTokenStream(calcLexer);
CalculatorParser calcParser = new CalculatorParser(commonTokenStream);
CalculatorParser.EquationContext equationContext = calcParser.equation();
CalculatorVisitor calcVisitor = new CalculatorVisitor();
calcVisitor.EnterEquation(equationContext);
calcVisitor.printResult();
Console.ReadLine();
}
/// <summary>
/// Visit a parse tree produced by <see cref="CalculatorParser.equation"/>.
/// <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 VisitEquation([NotNull] CalculatorParser.EquationContext context)
{
return(VisitChildren(context));
}
/// <summary>
/// Exit a parse tree produced by <see cref="CalculatorParser.equation"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitEquation([NotNull] CalculatorParser.EquationContext context)
{
}