5
// Jonathan Pryor <jpryor@novell.com>
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// Copyright (C) 2008 Novell (http://www.novell.com)
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// Permission is hereby granted, free of charge, to any person obtaining
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// a copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to
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// permit persons to whom the Software is furnished to do so, subject to
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// the following conditions:
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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// gmcs -debug+ -r:System.Core Options.cs -o:NDesk.Options.dll
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// gmcs -debug+ -d:LINQ -r:System.Core Options.cs -o:NDesk.Options.dll
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// The LINQ version just changes the implementation of
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// OptionSet.Parse(IEnumerable<string>), and confers no semantic changes.
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// A Getopt::Long-inspired option parsing library for C#.
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// NDesk.Options.OptionSet is built upon a key/value table, where the
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// key is a option format string and the value is a delegate that is
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// invoked when the format string is matched.
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// Option format strings:
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// Regex-like BNF Grammar:
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// sep: ( [^{}]+ | '{' .+ '}' )?
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// aliases: ( name type sep ) ( '|' name type sep )*
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// Each '|'-delimited name is an alias for the associated action. If the
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// format string ends in a '=', it has a required value. If the format
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// string ends in a ':', it has an optional value. If neither '=' or ':'
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// is present, no value is supported. `=' or `:' need only be defined on one
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// alias, but if they are provided on more than one they must be consistent.
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// Each alias portion may also end with a "key/value separator", which is used
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// to split option values if the option accepts > 1 value. If not specified,
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// it defaults to '=' and ':'. If specified, it can be any character except
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// '{' and '}' OR the *string* between '{' and '}'. If no separator should be
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// used (i.e. the separate values should be distinct arguments), then "{}"
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// should be used as the separator.
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// Options are extracted either from the current option by looking for
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// the option name followed by an '=' or ':', or is taken from the
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// following option IFF:
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// - The current option does not contain a '=' or a ':'
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// - The current option requires a value (i.e. not a Option type of ':')
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// The `name' used in the option format string does NOT include any leading
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// option indicator, such as '-', '--', or '/'. All three of these are
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// permitted/required on any named option.
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// Option bundling is permitted so long as:
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// - '-' is used to start the option group
75
// - all of the bundled options are a single character
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// - at most one of the bundled options accepts a value, and the value
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// provided starts from the next character to the end of the string.
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// This allows specifying '-a -b -c' as '-abc', and specifying '-D name=value'
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// Option processing is disabled by specifying "--". All options after "--"
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// are returned by OptionSet.Parse() unchanged and unprocessed.
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// Unprocessed options are returned from OptionSet.Parse().
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// OptionSet p = new OptionSet ()
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// .Add ("v", v => ++verbose)
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// .Add ("name=|value=", v => Console.WriteLine (v));
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// p.Parse (new string[]{"-v", "--v", "/v", "-name=A", "/name", "B", "extra"});
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// The above would parse the argument string array, and would invoke the
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// lambda expression three times, setting `verbose' to 3 when complete.
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// It would also print out "A" and "B" to standard output.
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// The returned array would contain the string "extra".
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// C# 3.0 collection initializers are supported and encouraged:
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// var p = new OptionSet () {
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// { "h|?|help", v => ShowHelp () },
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// System.ComponentModel.TypeConverter is also supported, allowing the use of
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// custom data types in the callback type; TypeConverter.ConvertFromString()
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// is used to convert the value option to an instance of the specified
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// var p = new OptionSet () {
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// { "foo=", (Foo f) => Console.WriteLine (f.ToString ()) },
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// Random other tidbits:
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// - Boolean options (those w/o '=' or ':' in the option format string)
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// are explicitly enabled if they are followed with '+', and explicitly
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// disabled if they are followed with '-':
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// var p = new OptionSet () {
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// { "a", s => a = s },
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// p.Parse (new string[]{"-a"}); // sets v != null
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// p.Parse (new string[]{"-a+"}); // sets v != null
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// p.Parse (new string[]{"-a-"}); // sets v == null
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using System.Collections;
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using System.Collections.Generic;
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using System.Collections.ObjectModel;
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using System.ComponentModel;
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using System.Globalization;
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using System.Runtime.Serialization;
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using System.Security.Permissions;
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using System.Text.RegularExpressions;
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namespace NDesk.Options
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namespace Mono.Options
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public class OptionValueCollection : IList, IList<string> {
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List<string> values = new List<string> ();
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internal OptionValueCollection (OptionContext c)
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void ICollection.CopyTo (Array array, int index) {(values as ICollection).CopyTo (array, index);}
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bool ICollection.IsSynchronized {get {return (values as ICollection).IsSynchronized;}}
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object ICollection.SyncRoot {get {return (values as ICollection).SyncRoot;}}
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#region ICollection<T>
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public void Add (string item) {values.Add (item);}
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public void Clear () {values.Clear ();}
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public bool Contains (string item) {return values.Contains (item);}
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public void CopyTo (string[] array, int arrayIndex) {values.CopyTo (array, arrayIndex);}
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public bool Remove (string item) {return values.Remove (item);}
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public int Count {get {return values.Count;}}
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public bool IsReadOnly {get {return false;}}
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IEnumerator IEnumerable.GetEnumerator () {return values.GetEnumerator ();}
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#region IEnumerable<T>
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public IEnumerator<string> GetEnumerator () {return values.GetEnumerator ();}
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int IList.Add (object value) {return (values as IList).Add (value);}
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bool IList.Contains (object value) {return (values as IList).Contains (value);}
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int IList.IndexOf (object value) {return (values as IList).IndexOf (value);}
190
void IList.Insert (int index, object value) {(values as IList).Insert (index, value);}
191
void IList.Remove (object value) {(values as IList).Remove (value);}
192
void IList.RemoveAt (int index) {(values as IList).RemoveAt (index);}
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bool IList.IsFixedSize {get {return false;}}
194
object IList.this [int index] {get {return this [index];} set {(values as IList)[index] = value;}}
198
public int IndexOf (string item) {return values.IndexOf (item);}
199
public void Insert (int index, string item) {values.Insert (index, item);}
200
public void RemoveAt (int index) {values.RemoveAt (index);}
202
private void AssertValid (int index)
204
if (c.Option == null)
205
throw new InvalidOperationException ("OptionContext.Option is null.");
206
if (index >= c.Option.MaxValueCount)
207
throw new ArgumentOutOfRangeException ("index");
208
if (c.Option.OptionValueType == OptionValueType.Required &&
209
index >= values.Count)
210
throw new OptionException (string.Format (
211
c.OptionSet.MessageLocalizer ("Missing required value for option '{0}'."), c.OptionName),
215
public string this [int index] {
218
return index >= values.Count ? null : values [index];
221
values [index] = value;
226
public List<string> ToList ()
228
return new List<string> (values);
231
public string[] ToArray ()
233
return values.ToArray ();
236
public override string ToString ()
238
return string.Join (", ", values.ToArray ());
242
public class OptionContext {
243
private Option option;
246
private OptionSet set;
247
private OptionValueCollection c;
249
public OptionContext (OptionSet set)
252
this.c = new OptionValueCollection (this);
255
public Option Option {
257
set {option = value;}
260
public string OptionName {
265
public int OptionIndex {
270
public OptionSet OptionSet {
274
public OptionValueCollection OptionValues {
279
public enum OptionValueType {
285
public abstract class Option {
286
string prototype, description;
288
OptionValueType type;
292
protected Option (string prototype, string description)
293
: this (prototype, description, 1)
297
protected Option (string prototype, string description, int maxValueCount)
299
if (prototype == null)
300
throw new ArgumentNullException ("prototype");
301
if (prototype.Length == 0)
302
throw new ArgumentException ("Cannot be the empty string.", "prototype");
303
if (maxValueCount < 0)
304
throw new ArgumentOutOfRangeException ("maxValueCount");
306
this.prototype = prototype;
307
this.names = prototype.Split ('|');
308
this.description = description;
309
this.count = maxValueCount;
310
this.type = ParsePrototype ();
312
if (this.count == 0 && type != OptionValueType.None)
313
throw new ArgumentException (
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"Cannot provide maxValueCount of 0 for OptionValueType.Required or " +
315
"OptionValueType.Optional.",
317
if (this.type == OptionValueType.None && maxValueCount > 1)
318
throw new ArgumentException (
319
string.Format ("Cannot provide maxValueCount of {0} for OptionValueType.None.", maxValueCount),
321
if (Array.IndexOf (names, "<>") >= 0 &&
322
((names.Length == 1 && this.type != OptionValueType.None) ||
323
(names.Length > 1 && this.MaxValueCount > 1)))
324
throw new ArgumentException (
325
"The default option handler '<>' cannot require values.",
329
public string Prototype {get {return prototype;}}
330
public string Description {get {return description;}}
331
public OptionValueType OptionValueType {get {return type;}}
332
public int MaxValueCount {get {return count;}}
334
public string[] GetNames ()
336
return (string[]) names.Clone ();
339
public string[] GetValueSeparators ()
341
if (separators == null)
342
return new string [0];
343
return (string[]) separators.Clone ();
346
protected static T Parse<T> (string value, OptionContext c)
348
Type tt = typeof (T);
349
bool nullable = tt.IsValueType && tt.IsGenericType &&
350
!tt.IsGenericTypeDefinition &&
351
tt.GetGenericTypeDefinition () == typeof (Nullable<>);
352
Type targetType = nullable ? tt.GetGenericArguments () [0] : typeof (T);
353
TypeConverter conv = TypeDescriptor.GetConverter (targetType);
357
t = (T) conv.ConvertFromString (value);
359
catch (Exception e) {
360
throw new OptionException (
362
c.OptionSet.MessageLocalizer ("Could not convert string `{0}' to type {1} for option `{2}'."),
363
value, targetType.Name, c.OptionName),
369
internal string[] Names {get {return names;}}
370
internal string[] ValueSeparators {get {return separators;}}
372
static readonly char[] NameTerminator = new char[]{'=', ':'};
374
private OptionValueType ParsePrototype ()
377
List<string> seps = new List<string> ();
378
for (int i = 0; i < names.Length; ++i) {
379
string name = names [i];
380
if (name.Length == 0)
381
throw new ArgumentException ("Empty option names are not supported.", "prototype");
383
int end = name.IndexOfAny (NameTerminator);
386
names [i] = name.Substring (0, end);
387
if (type == '\0' || type == name [end])
390
throw new ArgumentException (
391
string.Format ("Conflicting option types: '{0}' vs. '{1}'.", type, name [end]),
393
AddSeparators (name, end, seps);
397
return OptionValueType.None;
399
if (count <= 1 && seps.Count != 0)
400
throw new ArgumentException (
401
string.Format ("Cannot provide key/value separators for Options taking {0} value(s).", count),
405
this.separators = new string[]{":", "="};
406
else if (seps.Count == 1 && seps [0].Length == 0)
407
this.separators = null;
409
this.separators = seps.ToArray ();
412
return type == '=' ? OptionValueType.Required : OptionValueType.Optional;
415
private static void AddSeparators (string name, int end, ICollection<string> seps)
418
for (int i = end+1; i < name.Length; ++i) {
422
throw new ArgumentException (
423
string.Format ("Ill-formed name/value separator found in \"{0}\".", name),
429
throw new ArgumentException (
430
string.Format ("Ill-formed name/value separator found in \"{0}\".", name),
432
seps.Add (name.Substring (start, i-start));
437
seps.Add (name [i].ToString ());
442
throw new ArgumentException (
443
string.Format ("Ill-formed name/value separator found in \"{0}\".", name),
447
public void Invoke (OptionContext c)
452
c.OptionValues.Clear ();
455
protected abstract void OnParseComplete (OptionContext c);
457
public override string ToString ()
464
public class OptionException : Exception {
465
private string option;
467
public OptionException ()
471
public OptionException (string message, string optionName)
474
this.option = optionName;
477
public OptionException (string message, string optionName, Exception innerException)
478
: base (message, innerException)
480
this.option = optionName;
483
protected OptionException (SerializationInfo info, StreamingContext context)
484
: base (info, context)
486
this.option = info.GetString ("OptionName");
489
public string OptionName {
490
get {return this.option;}
493
[SecurityPermission (SecurityAction.LinkDemand, SerializationFormatter = true)]
494
public override void GetObjectData (SerializationInfo info, StreamingContext context)
496
base.GetObjectData (info, context);
497
info.AddValue ("OptionName", option);
501
public delegate void OptionAction<TKey, TValue> (TKey key, TValue value);
503
public class OptionSet : KeyedCollection<string, Option>
506
: this (delegate (string f) {return f;})
510
public OptionSet (Converter<string, string> localizer)
512
this.localizer = localizer;
515
Converter<string, string> localizer;
517
public Converter<string, string> MessageLocalizer {
518
get {return localizer;}
521
protected override string GetKeyForItem (Option item)
524
throw new ArgumentNullException ("option");
525
if (item.Names != null && item.Names.Length > 0)
526
return item.Names [0];
527
// This should never happen, as it's invalid for Option to be
528
// constructed w/o any names.
529
throw new InvalidOperationException ("Option has no names!");
532
[Obsolete ("Use KeyedCollection.this[string]")]
533
protected Option GetOptionForName (string option)
536
throw new ArgumentNullException ("option");
538
return base [option];
540
catch (KeyNotFoundException) {
545
protected override void InsertItem (int index, Option item)
547
base.InsertItem (index, item);
551
protected override void RemoveItem (int index)
553
base.RemoveItem (index);
554
Option p = Items [index];
555
// KeyedCollection.RemoveItem() handles the 0th item
556
for (int i = 1; i < p.Names.Length; ++i) {
557
Dictionary.Remove (p.Names [i]);
561
protected override void SetItem (int index, Option item)
563
base.SetItem (index, item);
568
private void AddImpl (Option option)
571
throw new ArgumentNullException ("option");
572
List<string> added = new List<string> (option.Names.Length);
574
// KeyedCollection.InsertItem/SetItem handle the 0th name.
575
for (int i = 1; i < option.Names.Length; ++i) {
576
Dictionary.Add (option.Names [i], option);
577
added.Add (option.Names [i]);
581
foreach (string name in added)
582
Dictionary.Remove (name);
587
public new OptionSet Add (Option option)
593
sealed class ActionOption : Option {
594
Action<OptionValueCollection> action;
596
public ActionOption (string prototype, string description, int count, Action<OptionValueCollection> action)
597
: base (prototype, description, count)
600
throw new ArgumentNullException ("action");
601
this.action = action;
604
protected override void OnParseComplete (OptionContext c)
606
action (c.OptionValues);
610
public OptionSet Add (string prototype, Action<string> action)
612
return Add (prototype, null, action);
615
public OptionSet Add (string prototype, string description, Action<string> action)
618
throw new ArgumentNullException ("action");
619
Option p = new ActionOption (prototype, description, 1,
620
delegate (OptionValueCollection v) { action (v [0]); });
625
public OptionSet Add (string prototype, OptionAction<string, string> action)
627
return Add (prototype, null, action);
630
public OptionSet Add (string prototype, string description, OptionAction<string, string> action)
633
throw new ArgumentNullException ("action");
634
Option p = new ActionOption (prototype, description, 2,
635
delegate (OptionValueCollection v) {action (v [0], v [1]);});
640
sealed class ActionOption<T> : Option {
643
public ActionOption (string prototype, string description, Action<T> action)
644
: base (prototype, description, 1)
647
throw new ArgumentNullException ("action");
648
this.action = action;
651
protected override void OnParseComplete (OptionContext c)
653
action (Parse<T> (c.OptionValues [0], c));
657
sealed class ActionOption<TKey, TValue> : Option {
658
OptionAction<TKey, TValue> action;
660
public ActionOption (string prototype, string description, OptionAction<TKey, TValue> action)
661
: base (prototype, description, 2)
664
throw new ArgumentNullException ("action");
665
this.action = action;
668
protected override void OnParseComplete (OptionContext c)
671
Parse<TKey> (c.OptionValues [0], c),
672
Parse<TValue> (c.OptionValues [1], c));
676
public OptionSet Add<T> (string prototype, Action<T> action)
678
return Add (prototype, null, action);
681
public OptionSet Add<T> (string prototype, string description, Action<T> action)
683
return Add (new ActionOption<T> (prototype, description, action));
686
public OptionSet Add<TKey, TValue> (string prototype, OptionAction<TKey, TValue> action)
688
return Add (prototype, null, action);
691
public OptionSet Add<TKey, TValue> (string prototype, string description, OptionAction<TKey, TValue> action)
693
return Add (new ActionOption<TKey, TValue> (prototype, description, action));
696
protected virtual OptionContext CreateOptionContext ()
698
return new OptionContext (this);
702
public List<string> Parse (IEnumerable<string> arguments)
705
OptionContext c = CreateOptionContext ();
707
var def = GetOptionForName ("<>");
709
from argument in arguments
710
where ++c.OptionIndex >= 0 && (process || def != null)
714
: !Parse (argument, c)
716
? Unprocessed (null, def, c, argument)
720
? Unprocessed (null, def, c, argument)
724
List<string> r = unprocessed.ToList ();
725
if (c.Option != null)
730
public List<string> Parse (IEnumerable<string> arguments)
732
OptionContext c = CreateOptionContext ();
735
List<string> unprocessed = new List<string> ();
736
Option def = Contains ("<>") ? this ["<>"] : null;
737
foreach (string argument in arguments) {
739
if (argument == "--") {
744
Unprocessed (unprocessed, def, c, argument);
747
if (!Parse (argument, c))
748
Unprocessed (unprocessed, def, c, argument);
750
if (c.Option != null)
756
private static bool Unprocessed (ICollection<string> extra, Option def, OptionContext c, string argument)
759
extra.Add (argument);
762
c.OptionValues.Add (argument);
768
private readonly Regex ValueOption = new Regex (
769
@"^(?<flag>--|-|/)(?<name>[^:=]+)((?<sep>[:=])(?<value>.*))?$");
771
protected bool GetOptionParts (string argument, out string flag, out string name, out string sep, out string value)
773
if (argument == null)
774
throw new ArgumentNullException ("argument");
776
flag = name = sep = value = null;
777
Match m = ValueOption.Match (argument);
781
flag = m.Groups ["flag"].Value;
782
name = m.Groups ["name"].Value;
783
if (m.Groups ["sep"].Success && m.Groups ["value"].Success) {
784
sep = m.Groups ["sep"].Value;
785
value = m.Groups ["value"].Value;
790
protected virtual bool Parse (string argument, OptionContext c)
792
if (c.Option != null) {
793
ParseValue (argument, c);
798
if (!GetOptionParts (argument, out f, out n, out s, out v))
804
c.OptionName = f + n;
806
switch (p.OptionValueType) {
807
case OptionValueType.None:
808
c.OptionValues.Add (n);
811
case OptionValueType.Optional:
812
case OptionValueType.Required:
818
// no match; is it a bool option?
819
if (ParseBool (argument, n, c))
821
// is it a bundled option?
822
if (ParseBundledValue (f, string.Concat (n + s + v), c))
828
private void ParseValue (string option, OptionContext c)
831
foreach (string o in c.Option.ValueSeparators != null
832
? option.Split (c.Option.ValueSeparators, StringSplitOptions.None)
833
: new string[]{option}) {
834
c.OptionValues.Add (o);
836
if (c.OptionValues.Count == c.Option.MaxValueCount ||
837
c.Option.OptionValueType == OptionValueType.Optional)
839
else if (c.OptionValues.Count > c.Option.MaxValueCount) {
840
throw new OptionException (localizer (string.Format (
841
"Error: Found {0} option values when expecting {1}.",
842
c.OptionValues.Count, c.Option.MaxValueCount)),
847
private bool ParseBool (string option, string n, OptionContext c)
851
if (n.Length >= 1 && (n [n.Length-1] == '+' || n [n.Length-1] == '-') &&
852
Contains ((rn = n.Substring (0, n.Length-1)))) {
854
string v = n [n.Length-1] == '+' ? option : null;
855
c.OptionName = option;
857
c.OptionValues.Add (v);
864
private bool ParseBundledValue (string f, string n, OptionContext c)
868
for (int i = 0; i < n.Length; ++i) {
870
string opt = f + n [i].ToString ();
871
string rn = n [i].ToString ();
872
if (!Contains (rn)) {
875
throw new OptionException (string.Format (localizer (
876
"Cannot bundle unregistered option '{0}'."), opt), opt);
879
switch (p.OptionValueType) {
880
case OptionValueType.None:
881
Invoke (c, opt, n, p);
883
case OptionValueType.Optional:
884
case OptionValueType.Required: {
885
string v = n.Substring (i+1);
888
ParseValue (v.Length != 0 ? v : null, c);
892
throw new InvalidOperationException ("Unknown OptionValueType: " + p.OptionValueType);
898
private static void Invoke (OptionContext c, string name, string value, Option option)
902
c.OptionValues.Add (value);
906
private const int OptionWidth = 29;
908
public void WriteOptionDescriptions (TextWriter o)
910
foreach (Option p in this) {
912
if (!WriteOptionPrototype (o, p, ref written))
915
if (written < OptionWidth)
916
o.Write (new string (' ', OptionWidth - written));
919
o.Write (new string (' ', OptionWidth));
923
string prefix = new string (' ', OptionWidth+2);
924
foreach (string line in GetLines (localizer (GetDescription (p.Description)))) {
933
bool WriteOptionPrototype (TextWriter o, Option p, ref int written)
935
string[] names = p.Names;
937
int i = GetNextOptionIndex (names, 0);
938
if (i == names.Length)
941
if (names [i].Length == 1) {
942
Write (o, ref written, " -");
943
Write (o, ref written, names [0]);
946
Write (o, ref written, " --");
947
Write (o, ref written, names [0]);
950
for ( i = GetNextOptionIndex (names, i+1);
951
i < names.Length; i = GetNextOptionIndex (names, i+1)) {
952
Write (o, ref written, ", ");
953
Write (o, ref written, names [i].Length == 1 ? "-" : "--");
954
Write (o, ref written, names [i]);
957
if (p.OptionValueType == OptionValueType.Optional ||
958
p.OptionValueType == OptionValueType.Required) {
959
if (p.OptionValueType == OptionValueType.Optional) {
960
Write (o, ref written, localizer ("["));
962
Write (o, ref written, localizer ("=" + GetArgumentName (0, p.MaxValueCount, p.Description)));
963
string sep = p.ValueSeparators != null && p.ValueSeparators.Length > 0
964
? p.ValueSeparators [0]
966
for (int c = 1; c < p.MaxValueCount; ++c) {
967
Write (o, ref written, localizer (sep + GetArgumentName (c, p.MaxValueCount, p.Description)));
969
if (p.OptionValueType == OptionValueType.Optional) {
970
Write (o, ref written, localizer ("]"));
976
static int GetNextOptionIndex (string[] names, int i)
978
while (i < names.Length && names [i] == "<>") {
984
static void Write (TextWriter o, ref int n, string s)
990
private static string GetArgumentName (int index, int maxIndex, string description)
992
if (description == null)
993
return maxIndex == 1 ? "VALUE" : "VALUE" + (index + 1);
996
nameStart = new string[]{"{0:", "{"};
998
nameStart = new string[]{"{" + index + ":"};
999
for (int i = 0; i < nameStart.Length; ++i) {
1002
start = description.IndexOf (nameStart [i], j);
1003
} while (start >= 0 && j != 0 ? description [j++ - 1] == '{' : false);
1006
int end = description.IndexOf ("}", start);
1009
return description.Substring (start + nameStart [i].Length, end - start - nameStart [i].Length);
1011
return maxIndex == 1 ? "VALUE" : "VALUE" + (index + 1);
1014
private static string GetDescription (string description)
1016
if (description == null)
1017
return string.Empty;
1018
StringBuilder sb = new StringBuilder (description.Length);
1020
for (int i = 0; i < description.Length; ++i) {
1021
switch (description [i]) {
1032
if ((i+1) == description.Length || description [i+1] != '}')
1033
throw new InvalidOperationException ("Invalid option description: " + description);
1038
sb.Append (description.Substring (start, i - start));
1049
sb.Append (description [i]);
1053
return sb.ToString ();
1056
private static IEnumerable<string> GetLines (string description)
1058
if (string.IsNullOrEmpty (description)) {
1059
yield return string.Empty;
1062
int length = 80 - OptionWidth - 1;
1065
end = GetLineEnd (start, length, description);
1066
char c = description [end-1];
1067
if (char.IsWhiteSpace (c))
1069
bool writeContinuation = end != description.Length && !IsEolChar (c);
1070
string line = description.Substring (start, end - start) +
1071
(writeContinuation ? "-" : "");
1074
if (char.IsWhiteSpace (c))
1076
length = 80 - OptionWidth - 2 - 1;
1077
} while (end < description.Length);
1080
private static bool IsEolChar (char c)
1082
return !char.IsLetterOrDigit (c);
1085
private static int GetLineEnd (int start, int length, string description)
1087
int end = System.Math.Min (start + length, description.Length);
1089
for (int i = start; i < end; ++i) {
1090
if (description [i] == '\n')
1092
if (IsEolChar (description [i]))
1095
if (sep == -1 || end == description.Length)
added
removed
src/core/MonoDevelop.Core/Mono.Options.cs
