public override Expression VisitInt([NotNull] CalcLangParser.IntContext context)
{
// strip off the underscores
string text = context.Integer().GetText().Replace("_", "");
int numBase = 10;
if (text.StartsWith("0x"))
{
text = text.Substring(2);
numBase = 16;
}
else if (text.StartsWith("0o"))
{
text = text.Substring(2);
numBase = 8;
}
else if (text.StartsWith("0b"))
{
text = text.Substring(2);
numBase = 2;
}
(int index, int length) = ExpressionIndexAndLength(context.SourceInterval);
BigInteger result = HornerScheme(text, numBase);
if (result <= long.MaxValue)
{
return(new PrimitiveExpression(index, length, (long)result));
}
return(new PrimitiveExpression(index, length, result));
}
/// <summary>
/// Visit a parse tree produced by the <c>Int</c>
/// labeled alternative in <see cref="CalcLangParser.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 VisitInt([NotNull] CalcLangParser.IntContext context)
{
return(VisitChildren(context));
}
/// <summary>
/// Exit a parse tree produced by the <c>Int</c>
/// labeled alternative in <see cref="CalcLangParser.expression"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitInt([NotNull] CalcLangParser.IntContext context)
{
}
