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Options.cs
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Options.cs
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//
// Options.cs
//
// Authors:
// Jonathan Pryor <jpryor@novell.com>, <Jonathan.Pryor@microsoft.com>
// Federico Di Gregorio <fog@initd.org>
// Rolf Bjarne Kvinge <rolf@xamarin.com>
//
// Copyright (C) 2008 Novell (http://www.novell.com)
// Copyright (C) 2009 Federico Di Gregorio.
// Copyright (C) 2012 Xamarin Inc (http://www.xamarin.com)
// Copyright (C) 2017 Microsoft Corporation (http://www.microsoft.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
// Compile With:
// mcs -debug+ -r:System.Core Options.cs -o:Mono.Options.dll -t:library
// mcs -debug+ -d:LINQ -r:System.Core Options.cs -o:Mono.Options.dll -t:library
//
// The LINQ version just changes the implementation of
// OptionSet.Parse(IEnumerable<string>), and confers no semantic changes.
//
// A Getopt::Long-inspired option parsing library for C#.
//
// Mono.Options.OptionSet is built upon a key/value table, where the
// key is a option format string and the value is a delegate that is
// invoked when the format string is matched.
//
// Option format strings:
// Regex-like BNF Grammar:
// name: .+
// type: [=:]
// sep: ( [^{}]+ | '{' .+ '}' )?
// aliases: ( name type sep ) ( '|' name type sep )*
//
// Each '|'-delimited name is an alias for the associated action. If the
// format string ends in a '=', it has a required value. If the format
// string ends in a ':', it has an optional value. If neither '=' or ':'
// is present, no value is supported. `=' or `:' need only be defined on one
// alias, but if they are provided on more than one they must be consistent.
//
// Each alias portion may also end with a "key/value separator", which is used
// to split option values if the option accepts > 1 value. If not specified,
// it defaults to '=' and ':'. If specified, it can be any character except
// '{' and '}' OR the *string* between '{' and '}'. If no separator should be
// used (i.e. the separate values should be distinct arguments), then "{}"
// should be used as the separator.
//
// Options are extracted either from the current option by looking for
// the option name followed by an '=' or ':', or is taken from the
// following option IFF:
// - The current option does not contain a '=' or a ':'
// - The current option requires a value (i.e. not a Option type of ':')
//
// The `name' used in the option format string does NOT include any leading
// option indicator, such as '-', '--', or '/'. All three of these are
// permitted/required on any named option.
//
// Option bundling is permitted so long as:
// - '-' is used to start the option group
// - all of the bundled options are a single character
// - at most one of the bundled options accepts a value, and the value
// provided starts from the next character to the end of the string.
//
// This allows specifying '-a -b -c' as '-abc', and specifying '-D name=value'
// as '-Dname=value'.
//
// Option processing is disabled by specifying "--". All options after "--"
// are returned by OptionSet.Parse() unchanged and unprocessed.
//
// Unprocessed options are returned from OptionSet.Parse().
//
// Examples:
// int verbose = 0;
// OptionSet p = new OptionSet ()
// .Add ("v", v => ++verbose)
// .Add ("name=|value=", v => Console.WriteLine (v));
// p.Parse (new string[]{"-v", "--v", "/v", "-name=A", "/name", "B", "extra"});
//
// The above would parse the argument string array, and would invoke the
// lambda expression three times, setting `verbose' to 3 when complete.
// It would also print out "A" and "B" to standard output.
// The returned array would contain the string "extra".
//
// C# 3.0 collection initializers are supported and encouraged:
// var p = new OptionSet () {
// { "h|?|help", v => ShowHelp () },
// };
//
// System.ComponentModel.TypeConverter is also supported, allowing the use of
// custom data types in the callback type; TypeConverter.ConvertFromString()
// is used to convert the value option to an instance of the specified
// type:
//
// var p = new OptionSet () {
// { "foo=", (Foo f) => Console.WriteLine (f.ToString ()) },
// };
//
// Random other tidbits:
// - Boolean options (those w/o '=' or ':' in the option format string)
// are explicitly enabled if they are followed with '+', and explicitly
// disabled if they are followed with '-':
// string a = null;
// var p = new OptionSet () {
// { "a", s => a = s },
// };
// p.Parse (new string[]{"-a"}); // sets v != null
// p.Parse (new string[]{"-a+"}); // sets v != null
// p.Parse (new string[]{"-a-"}); // sets v == null
//
//
// Mono.Options.CommandSet allows easily having separate commands and
// associated command options, allowing creation of a *suite* along the
// lines of **git**(1), **svn**(1), etc.
//
// CommandSet allows intermixing plain text strings for `--help` output,
// Option values -- as supported by OptionSet -- and Command instances,
// which have a name, optional help text, and an optional OptionSet.
//
// var suite = new CommandSet ("suite-name") {
// // Use strings and option values, as with OptionSet
// "usage: suite-name COMMAND [OPTIONS]+",
// { "v:", "verbosity", (int? v) => Verbosity = v.HasValue ? v.Value : Verbosity+1 },
// // Commands may also be specified
// new Command ("command-name", "command help") {
// Options = new OptionSet {/*...*/},
// Run = args => { /*...*/},
// },
// new MyCommandSubclass (),
// };
// return suite.Run (new string[]{...});
//
// CommandSet provides a `help` command, and forwards `help COMMAND`
// to the registered Command instance by invoking Command.Invoke()
// with `--help` as an option.
//
using System;
using System.Collections;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Globalization;
using System.IO;
#if PCL
using System.Reflection;
#else
using System.Runtime.Serialization;
using System.Security.Permissions;
#endif
using System.Text;
using System.Text.RegularExpressions;
#if LINQ
using System.Linq;
#endif
#if TEST
using NDesk.Options;
#endif
#if PCL
using MessageLocalizerConverter = System.Func<string, string>;
#else
using MessageLocalizerConverter = System.Converter<string, string>;
#endif
#if NDESK_OPTIONS
namespace NDesk.Options
#else
namespace Mono.Options
#endif
{
static class StringCoda {
public static IEnumerable<string> WrappedLines(string self, params int[] widths) {
IEnumerable<int> w = widths;
return WrappedLines(self, w);
}
public static IEnumerable<string> WrappedLines(string self, IEnumerable<int> widths) {
if (widths == null)
throw new ArgumentNullException("widths");
return CreateWrappedLinesIterator(self, widths);
}
private static IEnumerable<string> CreateWrappedLinesIterator(string self, IEnumerable<int> widths) {
if (string.IsNullOrEmpty(self)) {
yield return string.Empty;
yield break;
}
using (IEnumerator<int> ewidths = widths.GetEnumerator()) {
bool? hw = null;
int width = GetNextWidth(ewidths, int.MaxValue, ref hw);
int start = 0, end;
do {
end = GetLineEnd(start, width, self);
// endCorrection is 1 if the line end is '\n', and might be 2 if the line end is '\r\n'.
int endCorrection = 1;
if (end >= 2 && self.Substring(end - 2, 2).Equals("\r\n"))
endCorrection = 2;
char c = self[end - endCorrection];
if (char.IsWhiteSpace(c))
end -= endCorrection;
bool needContinuation = end != self.Length && !IsEolChar(c);
string continuation = "";
if (needContinuation) {
--end;
continuation = "-";
}
string line = self.Substring(start, end - start) + continuation;
yield return line;
start = end;
if (char.IsWhiteSpace(c))
start += endCorrection;
width = GetNextWidth(ewidths, width, ref hw);
} while (start < self.Length);
}
}
private static int GetNextWidth(IEnumerator<int> ewidths, int curWidth, ref bool? eValid) {
if (!eValid.HasValue || (eValid.HasValue && eValid.Value)) {
curWidth = (eValid = ewidths.MoveNext()).Value ? ewidths.Current : curWidth;
// '.' is any character, - is for a continuation
const string minWidth = ".-";
if (curWidth < minWidth.Length)
throw new ArgumentOutOfRangeException("widths",
string.Format("Element must be >= {0}, was {1}.", minWidth.Length, curWidth));
return curWidth;
}
// no more elements, use the last element.
return curWidth;
}
private static bool IsEolChar(char c) {
return !char.IsLetterOrDigit(c);
}
private static int GetLineEnd(int start, int length, string description) {
int end = System.Math.Min(start + length, description.Length);
int sep = -1;
for (int i = start; i < end; ++i) {
if (i + 2 <= description.Length && description.Substring(i, 2).Equals("\r\n"))
return i + 2;
if (description[i] == '\n')
return i + 1;
if (IsEolChar(description[i]))
sep = i + 1;
}
if (sep == -1 || end == description.Length)
return end;
return sep;
}
}
public class OptionValueCollection : IList, IList<string> {
List<string> values = new List<string>();
OptionContext c;
internal OptionValueCollection(OptionContext c) {
this.c = c;
}
#region ICollection
void ICollection.CopyTo(Array array, int index) { (values as ICollection).CopyTo(array, index); }
bool ICollection.IsSynchronized { get { return (values as ICollection).IsSynchronized; } }
object ICollection.SyncRoot { get { return (values as ICollection).SyncRoot; } }
#endregion
#region ICollection<T>
public void Add(string item) { values.Add(item); }
public void Clear() { values.Clear(); }
public bool Contains(string item) { return values.Contains(item); }
public void CopyTo(string[] array, int arrayIndex) { values.CopyTo(array, arrayIndex); }
public bool Remove(string item) { return values.Remove(item); }
public int Count { get { return values.Count; } }
public bool IsReadOnly { get { return false; } }
#endregion
#region IEnumerable
IEnumerator IEnumerable.GetEnumerator() { return values.GetEnumerator(); }
#endregion
#region IEnumerable<T>
public IEnumerator<string> GetEnumerator() { return values.GetEnumerator(); }
#endregion
#region IList
int IList.Add(object value) { return (values as IList).Add(value); }
bool IList.Contains(object value) { return (values as IList).Contains(value); }
int IList.IndexOf(object value) { return (values as IList).IndexOf(value); }
void IList.Insert(int index, object value) { (values as IList).Insert(index, value); }
void IList.Remove(object value) { (values as IList).Remove(value); }
void IList.RemoveAt(int index) { (values as IList).RemoveAt(index); }
bool IList.IsFixedSize { get { return false; } }
object IList.this[int index] { get { return this[index]; } set { (values as IList)[index] = value; } }
#endregion
#region IList<T>
public int IndexOf(string item) { return values.IndexOf(item); }
public void Insert(int index, string item) { values.Insert(index, item); }
public void RemoveAt(int index) { values.RemoveAt(index); }
private void AssertValid(int index) {
if (c.Option == null)
throw new InvalidOperationException("OptionContext.Option is null.");
if (index >= c.Option.MaxValueCount)
throw new ArgumentOutOfRangeException("index");
if (c.Option.OptionValueType == OptionValueType.Required &&
index >= values.Count)
throw new OptionException(string.Format(
c.OptionSet.MessageLocalizer("Missing required value for option '{0}'."), c.OptionName),
c.OptionName);
}
public string this[int index] {
get {
AssertValid(index);
return index >= values.Count ? null : values[index];
}
set {
values[index] = value;
}
}
#endregion
public List<string> ToList() {
return new List<string>(values);
}
public string[] ToArray() {
return values.ToArray();
}
public override string ToString() {
return string.Join(", ", values.ToArray());
}
}
public class OptionContext {
private Option option;
private string name;
private int index;
private OptionSet set;
private OptionValueCollection c;
public OptionContext(OptionSet set) {
this.set = set;
this.c = new OptionValueCollection(this);
}
public Option Option {
get { return option; }
set { option = value; }
}
public string OptionName {
get { return name; }
set { name = value; }
}
public int OptionIndex {
get { return index; }
set { index = value; }
}
public OptionSet OptionSet {
get { return set; }
}
public OptionValueCollection OptionValues {
get { return c; }
}
}
public enum OptionValueType {
None,
Optional,
Required,
}
public abstract class Option {
string prototype, description;
string[] names;
OptionValueType type;
int count;
string[] separators;
bool hidden;
protected Option(string prototype, string description)
: this(prototype, description, 1, false) {
}
protected Option(string prototype, string description, int maxValueCount)
: this(prototype, description, maxValueCount, false) {
}
protected Option(string prototype, string description, int maxValueCount, bool hidden) {
if (prototype == null)
throw new ArgumentNullException("prototype");
if (prototype.Length == 0)
throw new ArgumentException("Cannot be the empty string.", "prototype");
if (maxValueCount < 0)
throw new ArgumentOutOfRangeException("maxValueCount");
this.prototype = prototype;
this.description = description;
this.count = maxValueCount;
this.names = (this is OptionSet.Category)
// append GetHashCode() so that "duplicate" categories have distinct
// names, e.g. adding multiple "" categories should be valid.
? new[] { prototype + this.GetHashCode() }
: prototype.Split('|');
if (this is OptionSet.Category || this is CommandOption)
return;
this.type = ParsePrototype();
this.hidden = hidden;
if (this.count == 0 && type != OptionValueType.None)
throw new ArgumentException(
"Cannot provide maxValueCount of 0 for OptionValueType.Required or " +
"OptionValueType.Optional.",
"maxValueCount");
if (this.type == OptionValueType.None && maxValueCount > 1)
throw new ArgumentException(
string.Format("Cannot provide maxValueCount of {0} for OptionValueType.None.", maxValueCount),
"maxValueCount");
if (Array.IndexOf(names, "<>") >= 0 &&
((names.Length == 1 && this.type != OptionValueType.None) ||
(names.Length > 1 && this.MaxValueCount > 1)))
throw new ArgumentException(
"The default option handler '<>' cannot require values.",
"prototype");
}
public string Prototype { get { return prototype; } }
public string Description { get { return description; } }
public OptionValueType OptionValueType { get { return type; } }
public int MaxValueCount { get { return count; } }
public bool Hidden { get { return hidden; } }
public string[] GetNames() {
return (string[])names.Clone();
}
public string[] GetValueSeparators() {
if (separators == null)
return new string[0];
return (string[])separators.Clone();
}
protected static T Parse<T>(string value, OptionContext c) {
Type tt = typeof(T);
#if PCL
TypeInfo ti = tt.GetTypeInfo ();
#else
Type ti = tt;
#endif
bool nullable =
ti.IsValueType &&
ti.IsGenericType &&
!ti.IsGenericTypeDefinition &&
ti.GetGenericTypeDefinition() == typeof(Nullable<>);
#if PCL
Type targetType = nullable ? tt.GenericTypeArguments [0] : tt;
#else
Type targetType = nullable ? tt.GetGenericArguments()[0] : tt;
#endif
T t = default(T);
try {
if (value != null) {
#if PCL
if (targetType.GetTypeInfo ().IsEnum)
t = (T) Enum.Parse (targetType, value, true);
else
t = (T) Convert.ChangeType (value, targetType);
#else
TypeConverter conv = TypeDescriptor.GetConverter(targetType);
t = (T)conv.ConvertFromString(value);
#endif
}
} catch (Exception e) {
throw new OptionException(
string.Format(
c.OptionSet.MessageLocalizer("Could not convert string `{0}' to type {1} for option `{2}'."),
value, targetType.Name, c.OptionName),
c.OptionName, e);
}
return t;
}
internal string[] Names { get { return names; } }
internal string[] ValueSeparators { get { return separators; } }
static readonly char[] NameTerminator = new char[] { '=', ':' };
private OptionValueType ParsePrototype() {
char type = '\0';
List<string> seps = new List<string>();
for (int i = 0; i < names.Length; ++i) {
string name = names[i];
if (name.Length == 0)
throw new ArgumentException("Empty option names are not supported.", "prototype");
int end = name.IndexOfAny(NameTerminator);
if (end == -1)
continue;
names[i] = name.Substring(0, end);
if (type == '\0' || type == name[end])
type = name[end];
else
throw new ArgumentException(
string.Format("Conflicting option types: '{0}' vs. '{1}'.", type, name[end]),
"prototype");
AddSeparators(name, end, seps);
}
if (type == '\0')
return OptionValueType.None;
if (count <= 1 && seps.Count != 0)
throw new ArgumentException(
string.Format("Cannot provide key/value separators for Options taking {0} value(s).", count),
"prototype");
if (count > 1) {
if (seps.Count == 0)
this.separators = new string[] { ":", "=" };
else if (seps.Count == 1 && seps[0].Length == 0)
this.separators = null;
else
this.separators = seps.ToArray();
}
return type == '=' ? OptionValueType.Required : OptionValueType.Optional;
}
private static void AddSeparators(string name, int end, ICollection<string> seps) {
int start = -1;
for (int i = end + 1; i < name.Length; ++i) {
switch (name[i]) {
case '{':
if (start != -1)
throw new ArgumentException(
string.Format("Ill-formed name/value separator found in \"{0}\".", name),
"prototype");
start = i + 1;
break;
case '}':
if (start == -1)
throw new ArgumentException(
string.Format("Ill-formed name/value separator found in \"{0}\".", name),
"prototype");
seps.Add(name.Substring(start, i - start));
start = -1;
break;
default:
if (start == -1)
seps.Add(name[i].ToString());
break;
}
}
if (start != -1)
throw new ArgumentException(
string.Format("Ill-formed name/value separator found in \"{0}\".", name),
"prototype");
}
public void Invoke(OptionContext c) {
OnParseComplete(c);
c.OptionName = null;
c.Option = null;
c.OptionValues.Clear();
}
protected abstract void OnParseComplete(OptionContext c);
internal void InvokeOnParseComplete(OptionContext c) {
OnParseComplete(c);
}
public override string ToString() {
return Prototype;
}
}
public abstract class ArgumentSource {
protected ArgumentSource() {
}
public abstract string[] GetNames();
public abstract string Description { get; }
public abstract bool GetArguments(string value, out IEnumerable<string> replacement);
#if !PCL || NETSTANDARD1_3
public static IEnumerable<string> GetArgumentsFromFile(string file) {
return GetArguments(File.OpenText(file), true);
}
#endif
public static IEnumerable<string> GetArguments(TextReader reader) {
return GetArguments(reader, false);
}
// Cribbed from mcs/driver.cs:LoadArgs(string)
static IEnumerable<string> GetArguments(TextReader reader, bool close) {
try {
StringBuilder arg = new StringBuilder();
string line;
while ((line = reader.ReadLine()) != null) {
int t = line.Length;
for (int i = 0; i < t; i++) {
char c = line[i];
if (c == '"' || c == '\'') {
char end = c;
for (i++; i < t; i++) {
c = line[i];
if (c == end)
break;
arg.Append(c);
}
} else if (c == ' ') {
if (arg.Length > 0) {
yield return arg.ToString();
arg.Length = 0;
}
} else
arg.Append(c);
}
if (arg.Length > 0) {
yield return arg.ToString();
arg.Length = 0;
}
}
} finally {
if (close)
reader.Dispose();
}
}
}
#if !PCL || NETSTANDARD1_3
internal class ResponseFileSource : ArgumentSource {
public override string[] GetNames() {
return new string[] { "@file" };
}
public override string Description {
get { return "Read response file for more options."; }
}
public override bool GetArguments(string value, out IEnumerable<string> replacement) {
if (string.IsNullOrEmpty(value) || !value.StartsWith("@")) {
replacement = null;
return false;
}
replacement = ArgumentSource.GetArgumentsFromFile(value.Substring(1));
return true;
}
}
#endif
#if !PCL
[Serializable]
#endif
internal class OptionException : Exception {
private string option;
public OptionException() {
}
public OptionException(string message, string optionName)
: base(message) {
this.option = optionName;
}
public OptionException(string message, string optionName, Exception innerException)
: base(message, innerException) {
this.option = optionName;
}
#if !PCL
protected OptionException(SerializationInfo info, StreamingContext context)
: base(info, context) {
this.option = info.GetString("OptionName");
}
#endif
public string OptionName {
get { return this.option; }
}
#if !PCL
#pragma warning disable 618 // SecurityPermissionAttribute is obsolete
[SecurityPermission(SecurityAction.LinkDemand, SerializationFormatter = true)]
#pragma warning restore 618
public override void GetObjectData(SerializationInfo info, StreamingContext context) {
base.GetObjectData(info, context);
info.AddValue("OptionName", option);
}
#endif
}
public delegate void OptionAction<TKey, TValue>(TKey key, TValue value);
public class OptionSet : KeyedCollection<string, Option> {
public OptionSet()
: this(null) {
}
public OptionSet(MessageLocalizerConverter localizer) {
this.roSources = new ReadOnlyCollection<ArgumentSource>(sources);
this.localizer = localizer;
if (this.localizer == null) {
this.localizer = delegate (string f) {
return f;
};
}
}
MessageLocalizerConverter localizer;
public MessageLocalizerConverter MessageLocalizer {
get { return localizer; }
internal set { localizer = value; }
}
List<ArgumentSource> sources = new List<ArgumentSource>();
ReadOnlyCollection<ArgumentSource> roSources;
public ReadOnlyCollection<ArgumentSource> ArgumentSources {
get { return roSources; }
}
protected override string GetKeyForItem(Option item) {
if (item == null)
throw new ArgumentNullException("option");
if (item.Names != null && item.Names.Length > 0)
return item.Names[0];
// This should never happen, as it's invalid for Option to be
// constructed w/o any names.
throw new InvalidOperationException("Option has no names!");
}
[Obsolete("Use KeyedCollection.this[string]")]
protected Option GetOptionForName(string option) {
if (option == null)
throw new ArgumentNullException("option");
try {
return base[option];
} catch (KeyNotFoundException) {
return null;
}
}
protected override void InsertItem(int index, Option item) {
base.InsertItem(index, item);
AddImpl(item);
}
protected override void RemoveItem(int index) {
Option p = Items[index];
base.RemoveItem(index);
// KeyedCollection.RemoveItem() handles the 0th item
for (int i = 1; i < p.Names.Length; ++i) {
Dictionary.Remove(p.Names[i]);
}
}
protected override void SetItem(int index, Option item) {
base.SetItem(index, item);
AddImpl(item);
}
private void AddImpl(Option option) {
if (option == null)
throw new ArgumentNullException("option");
List<string> added = new List<string>(option.Names.Length);
try {
// KeyedCollection.InsertItem/SetItem handle the 0th name.
for (int i = 1; i < option.Names.Length; ++i) {
Dictionary.Add(option.Names[i], option);
added.Add(option.Names[i]);
}
} catch (Exception) {
foreach (string name in added)
Dictionary.Remove(name);
throw;
}
}
public OptionSet Add(string header) {
if (header == null)
throw new ArgumentNullException("header");
Add(new Category(header));
return this;
}
internal sealed class Category : Option {
// Prototype starts with '=' because this is an invalid prototype
// (see Option.ParsePrototype(), and thus it'll prevent Category
// instances from being accidentally used as normal options.
public Category(string description)
: base("=:Category:= " + description, description) {
}
protected override void OnParseComplete(OptionContext c) {
throw new NotSupportedException("Category.OnParseComplete should not be invoked.");
}
}
public new OptionSet Add(Option option) {
base.Add(option);
return this;
}
sealed class ActionOption : Option {
Action<OptionValueCollection> action;
public ActionOption(string prototype, string description, int count, Action<OptionValueCollection> action)
: this(prototype, description, count, action, false) {
}
public ActionOption(string prototype, string description, int count, Action<OptionValueCollection> action, bool hidden)
: base(prototype, description, count, hidden) {
if (action == null)
throw new ArgumentNullException("action");
this.action = action;
}
protected override void OnParseComplete(OptionContext c) {
action(c.OptionValues);
}
}
public OptionSet Add(string prototype, Action<string> action) {
return Add(prototype, null, action);
}
public OptionSet Add(string prototype, string description, Action<string> action) {
return Add(prototype, description, action, false);
}
public OptionSet Add(string prototype, string description, Action<string> action, bool hidden) {
if (action == null)
throw new ArgumentNullException("action");
Option p = new ActionOption(prototype, description, 1,
delegate (OptionValueCollection v) { action(v[0]); }, hidden);
base.Add(p);
return this;
}
public OptionSet Add(string prototype, OptionAction<string, string> action) {
return Add(prototype, null, action);
}
public OptionSet Add(string prototype, string description, OptionAction<string, string> action) {
return Add(prototype, description, action, false);
}
public OptionSet Add(string prototype, string description, OptionAction<string, string> action, bool hidden) {
if (action == null)
throw new ArgumentNullException("action");
Option p = new ActionOption(prototype, description, 2,
delegate (OptionValueCollection v) { action(v[0], v[1]); }, hidden);
base.Add(p);
return this;
}
sealed class ActionOption<T> : Option {
Action<T> action;
public ActionOption(string prototype, string description, Action<T> action)
: base(prototype, description, 1) {
if (action == null)
throw new ArgumentNullException("action");
this.action = action;
}
protected override void OnParseComplete(OptionContext c) {
action(Parse<T>(c.OptionValues[0], c));
}
}
sealed class ActionOption<TKey, TValue> : Option {
OptionAction<TKey, TValue> action;
public ActionOption(string prototype, string description, OptionAction<TKey, TValue> action)
: base(prototype, description, 2) {
if (action == null)
throw new ArgumentNullException("action");
this.action = action;
}
protected override void OnParseComplete(OptionContext c) {
action(
Parse<TKey>(c.OptionValues[0], c),
Parse<TValue>(c.OptionValues[1], c));
}
}
public OptionSet Add<T>(string prototype, Action<T> action) {
return Add(prototype, null, action);
}
public OptionSet Add<T>(string prototype, string description, Action<T> action) {
return Add(new ActionOption<T>(prototype, description, action));
}
public OptionSet Add<TKey, TValue>(string prototype, OptionAction<TKey, TValue> action) {
return Add(prototype, null, action);
}
public OptionSet Add<TKey, TValue>(string prototype, string description, OptionAction<TKey, TValue> action) {
return Add(new ActionOption<TKey, TValue>(prototype, description, action));
}
public OptionSet Add(ArgumentSource source) {
if (source == null)
throw new ArgumentNullException("source");
sources.Add(source);
return this;
}
protected virtual OptionContext CreateOptionContext() {
return new OptionContext(this);
}
public List<string> Parse(IEnumerable<string> arguments) {
if (arguments == null)
throw new ArgumentNullException("arguments");
OptionContext c = CreateOptionContext();
c.OptionIndex = -1;
bool process = true;
List<string> unprocessed = new List<string>();
Option def = Contains("<>") ? this["<>"] : null;
ArgumentEnumerator ae = new ArgumentEnumerator(arguments);
foreach (string argument in ae) {
++c.OptionIndex;
if (argument == "--") {
process = false;
continue;
}
if (!process) {
Unprocessed(unprocessed, def, c, argument);
continue;
}
if (AddSource(ae, argument))
continue;
if (!Parse(argument, c))
Unprocessed(unprocessed, def, c, argument);
}
if (c.Option != null)
c.Option.Invoke(c);
return unprocessed;
}
class ArgumentEnumerator : IEnumerable<string> {
List<IEnumerator<string>> sources = new List<IEnumerator<string>>();
public ArgumentEnumerator(IEnumerable<string> arguments) {
sources.Add(arguments.GetEnumerator());
}
public void Add(IEnumerable<string> arguments) {
sources.Add(arguments.GetEnumerator());
}