public override int VisitAdditionSubtraction(GrammarParser.AdditionSubtractionContext context)
{
int l = Left(context), r = Right(context);
int ans = 0;
if (context.operation.Type == GrammarLexer.MINUS_SIGN)
{
ans = l - r;
Console.WriteLine($"minus {ans}");
}
else if (context.operation.Type == GrammarLexer.PLUS_SIGN)
{
ans = l + r;
Console.WriteLine($"plus {ans}");
}
return(ans);
}
/// <summary>
/// Visit a parse tree produced by the <c>AdditionSubtraction</c>
/// labeled alternative in <see cref="GrammarParser.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 VisitAdditionSubtraction([NotNull] GrammarParser.AdditionSubtractionContext context)
{
return(VisitChildren(context));
}
/// <summary>
/// Exit a parse tree produced by the <c>AdditionSubtraction</c>
/// labeled alternative in <see cref="GrammarParser.expression"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitAdditionSubtraction([NotNull] GrammarParser.AdditionSubtractionContext context)
{
}