public override Calc_node VisitNode([NotNull] CalcParser.NodeContext context)
{
Value_node node = new Value_node();
string text = context.GetText();
if (text.ToLower() == "pi" || text == "π")
{
node.isint = false;
node.fresult = Math.PI;
}
else if (text.ToLower() == "e")
{
node.isint = false;
node.fresult = Math.E;
}
else
{
try
{
node.isint = true;
node.result = Convert.ToInt32(text);
}
catch
{
node.isint = false;
node.fresult = Convert.ToDouble(text);
}
}
return(node);
}
/// <summary>
/// Visit a parse tree produced by <see cref="CalcParser.node"/>.
/// <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 VisitNode([NotNull] CalcParser.NodeContext context)
{
return(VisitChildren(context));
}
/// <summary>
/// Exit a parse tree produced by <see cref="CalcParser.node"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitNode([NotNull] CalcParser.NodeContext context)
{
}
