public override double VisitFunctionExp(SpreadsheetParser.FunctionExpContext context)
{
var name = context.NAME().GetText();
var result = name switch
{
"sqrt" => Math.Sqrt(Visit(context.expression())),
"log" => Math.Log10(Visit(context.expression())),
_ => 0 // if there is no function the result remains 0; maybe should throw an exception
};
return(result);
}
}
public override double VisitFunctionExp(SpreadsheetParser.FunctionExpContext context)
{
String name = context.NAME().GetText();
double result = 0;
switch (name)
{
case "sqrt":
result = Math.Sqrt(Visit(context.expression()));
break;
case "log":
result = Math.Log10(Visit(context.expression()));
break;
}
return(result);
}
/// <summary>
/// Exit a parse tree produced by the <c>functionExp</c>
/// labeled alternative in <see cref="SpreadsheetParser.expression"/>.
/// <para>The default implementation does nothing.</para>
/// </summary>
/// <param name="context">The parse tree.</param>
public virtual void ExitFunctionExp([NotNull] SpreadsheetParser.FunctionExpContext context)
{
}
/// <summary>
/// Visit a parse tree produced by the <c>functionExp</c>
/// labeled alternative in <see cref="SpreadsheetParser.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 VisitFunctionExp([NotNull] SpreadsheetParser.FunctionExpContext context)
{
return(VisitChildren(context));
}
