/// <summary>
/// Creates a message for the parse result.
/// </summary>
/// <remarks>Displays where the parsing succeeded or failed, as well as any named failures if the parsing failed.</remarks>
public static string ToMessage(this IParseResult result)
{
if (result.Success)
{
return(string.Format(CultureInfo.InvariantCulture, "success at {0}", result.NextPosition.GetLineColumn()));
}
else
{
StringBuilder stringBuilder = new StringBuilder();
stringBuilder.AppendFormat(CultureInfo.InvariantCulture, "failure at {0}", result.NextPosition.GetLineColumn());
foreach (var namedFailureGroup in result.GetNamedFailures().Distinct()
.GroupBy(x => x.Position.GetLineColumn())
.OrderByDescending(x => x.Key.LineNumber).ThenByDescending(x => x.Key.ColumnNumber)
.Select(x => new { Position = x.Key, Names = x.Select(y => y.Name).Distinct().ToArray() }))
{
stringBuilder.AppendFormat(CultureInfo.InvariantCulture,
"; expected {0} at {1}", string.Join(" or ", namedFailureGroup.Names), namedFailureGroup.Position);
}
return(stringBuilder.ToString());
}
}
