OptionAttribute.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;
 
using CommandLine.Infrastructure;
 
namespace CommandLine
{
    [AttributeUsage(AttributeTargets.Property)]
    public sealed class OptionAttribute : BaseAttribute
    {
        private string setName;
 
        private OptionAttribute(string shortName, string longName)
        {
            if (shortName == null)
            {
                throw new ArgumentNullException("shortName");
            }
 
            if (longName == null)
            {
                throw new ArgumentNullException("longName");
            }
 
            ShortName = shortName;
            LongName = longName;
            setName = string.Empty;
            Separator = '\0';
        }
 
        public OptionAttribute()
            : this(string.Empty, string.Empty) { }
 
        public OptionAttribute(string longName)
            : this(string.Empty, longName) { }
 
        public OptionAttribute(char shortName, string longName)
            : this(shortName.ToOneCharString(), longName) { }
 
        public OptionAttribute(char shortName)
            : this(shortName.ToOneCharString(), string.Empty) { }
 
        public string LongName { get; }
 
        public string ShortName { get; }
 
        public string SetName
        {
            get => setName;
            set
            {
                if (value == null)
                {
                    throw new ArgumentNullException("value");
                }
 
                setName = value;
            }
        }
 
        public bool FlagCounter { get; set; }
 
        public char Separator { get; set; }
 
        public string Group { get; set; } = string.Empty;
    }
}