Code:
/ FX-1434 / FX-1434 / 1.0 / untmp / whidbey / REDBITS / ndp / fx / src / Regex / System / Text / RegularExpressions / RegexGroup.cs / 1 / RegexGroup.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- // Group represents the substring or substrings that // are captured by a single capturing group after one // regular expression match. namespace System.Text.RegularExpressions { using System.Security.Permissions; ////// Group /// represents the results from a single capturing group. A capturing group can /// capture zero, one, or more strings in a single match because of quantifiers, so /// Group supplies a collection of Capture objects. /// [ Serializable() ] public class Group : Capture { // the empty group object internal static Group _emptygroup = new Group(String.Empty, new int[0], 0); internal int[] _caps; internal int _capcount; internal CaptureCollection _capcoll; internal Group(String text, int[] caps, int capcount) : base(text, capcount == 0 ? 0 : caps[(capcount - 1) * 2], capcount == 0 ? 0 : caps[(capcount * 2) - 1]) { _caps = caps; _capcount = capcount; } /* * True if the match was successful */ ////// public bool Success { get { return _capcount != 0; } } /* * The collection of all captures for this group */ ///Indicates whether the match is successful. ////// public CaptureCollection Captures { get { if (_capcoll == null) _capcoll = new CaptureCollection(this); return _capcoll; } } /* * Convert to a thread-safe object by precomputing cache contents */ ////// Returns a collection of all the captures matched by the capturing /// group, in innermost-leftmost-first order (or innermost-rightmost-first order if /// compiled with the "r" option). The collection may have zero or more items. /// ////// [HostProtection(Synchronization=true)] static public Group Synchronized(Group inner) { if (inner == null) throw new ArgumentNullException("inner"); // force Captures to be computed. CaptureCollection capcoll; Capture dummy; capcoll = inner.Captures; if (inner._capcount > 0) dummy = capcoll[0]; return inner; } } }Returns /// a Group object equivalent to the one supplied that is safe to share between /// multiple threads. ///
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