ErrorExtensions.cs

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// Copyright 2005-2015 Giacomo Stelluti Scala & Contributors. All rights reserved. See License.md in the project root for license information.
 
using System.Collections.Generic;
using System.Linq;
 
using CommandLine.Core;
using CommandLine.Infrastructure;
 
namespace CommandLine
{
    internal static class ErrorExtensions
    {
        public static ParserResult<T> ToParserResult<T>(this IEnumerable<Error> errors, T instance)
        {
            return errors.Any()
                       ? new NotParsed<T>(instance.GetType()
                                                  .ToTypeInfo(),
                                          errors
                                         )
                       : (ParserResult<T>)new Parsed<T>(instance);
        }
 
        public static IEnumerable<Error> OnlyMeaningfulOnes(this IEnumerable<Error> errors)
        {
            return errors
                   .Where(e => !e.StopsProcessing)
                   .Where(e => !(e.Tag == ErrorType.UnknownOptionError &&
                                 ((UnknownOptionError)e).Token.EqualsOrdinalIgnoreCase("help"))
                         );
        }
    }
}