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// Copyright (c) AlphaSierraPapa for the SharpDevelop Team
//
// 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.
using System;
using System.Collections.Generic;
using System.Linq;
namespace ICSharpCode.NRefactory.PatternMatching
{
/// <summary>
/// Represents the result of a pattern matching operation.
/// </summary>
public struct Match
{
// TODO: maybe we should add an implicit Match->bool conversion? (implicit operator bool(Match m) { return m != null; })
List<KeyValuePair<string, INode>> results;
public bool Success {
get { return results != null; }
}
internal static Match CreateNew()
{
Match m;
m.results = new List<KeyValuePair<string, INode>>();
return m;
}
internal int CheckPoint()
{
return results.Count;
}
internal void RestoreCheckPoint(int checkPoint)
{
results.RemoveRange(checkPoint, results.Count - checkPoint);
}
public IEnumerable<INode> Get(string groupName)
{
if (results == null)
yield break;
foreach (var pair in results) {
if (pair.Key == groupName)
yield return pair.Value;
}
}
public IEnumerable<T> Get<T>(string groupName) where T : INode
{
if (results == null)
yield break;
foreach (var pair in results) {
if (pair.Key == groupName)
yield return (T)pair.Value;
}
}
public bool Has(string groupName)
{
if (results == null)
return false;
foreach (var pair in results) {
if (pair.Key == groupName)
return true;
}
return false;
}
public void Add(string groupName, INode node)
{
if (groupName != null && node != null) {
results.Add(new KeyValuePair<string, INode>(groupName, node));
}
}
}
}
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