commandline/src/CommandLine/Core/OptionSpecification.cs at 84346bd7a2fda33b304b61d1cb06c1ced41e8607 · commandlineparser/commandline · GitHub

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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 System.Collections.Generic;
using System.Linq;
using CSharpx;

namespace CommandLine.Core
{
    sealed class OptionSpecification : Specification
    {
        public OptionSpecification(string shortName, string longName, bool required, string setName, Maybe<int> min, Maybe<int> max,
            char separator, Maybe<object> defaultValue, string helpText, string metaValue, IEnumerable<string> enumValues,
            Type conversionType, TargetType targetType, string group, bool flagCounter = false, bool hidden = false)
            : base(SpecificationType.Option,
                 required, min, max, defaultValue, helpText, metaValue, enumValues, conversionType, conversionType == typeof(int) && flagCounter ? TargetType.Switch : targetType, hidden)
        {
            this.ShortName = shortName;
            this.LongName = longName;
            this.Separator = separator;
            this.SetName = setName;
            this.Group = group;
            this.FlagCounter = flagCounter;
        }

        public static OptionSpecification FromAttribute(OptionAttribute attribute, Type conversionType, IEnumerable<string> enumValues)
        {
            return new OptionSpecification(
                attribute.ShortName,
                attribute.LongName,
                attribute.Required,
                attribute.SetName,
                attribute.Min == -1 ? Maybe.Nothing<int>() : Maybe.Just(attribute.Min),
                attribute.Max == -1 ? Maybe.Nothing<int>() : Maybe.Just(attribute.Max),
                attribute.Separator,
                attribute.Default.ToMaybe(),
                attribute.HelpText,
                attribute.MetaValue,
                enumValues,
                conversionType,
                conversionType.ToTargetType(),
                attribute.Group,
                attribute.FlagCounter,
                attribute.Hidden);
        }

        public static OptionSpecification NewSwitch(string shortName, string longName, bool required, string helpText, string metaValue, bool hidden = false)
        {
            return new OptionSpecification(shortName, longName, required, string.Empty, Maybe.Nothing<int>(), Maybe.Nothing<int>(),
                '\0', Maybe.Nothing<object>(), helpText, metaValue, Enumerable.Empty<string>(), typeof(bool), TargetType.Switch, string.Empty, false, hidden);
        }

        public string ShortName { get; }

        public string LongName { get; }

        public char Separator { get; }

        public string SetName { get; }

        public string Group { get; }

        /// <summary>
        /// Whether this is an int option that counts how many times a flag was set rather than taking a value on the command line
        /// </summary>
        public bool FlagCounter { get; }
    }
}