~ubuntu-branches/ubuntu/trusty/monodevelop/trusty-proposed

« back to all changes in this revision

Viewing changes to external/nrefactory/ICSharpCode.NRefactory.CSharp/Refactoring/CodeIssues/AccessToClosureIssues/LocalVariableNamePicker.cs

  • Committer: Package Import Robot
  • Author(s): Jo Shields
  • Date: 2013-05-12 09:46:03 UTC
  • mto: This revision was merged to the branch mainline in revision 29.
  • Revision ID: package-import@ubuntu.com-20130512094603-mad323bzcxvmcam0
Tags: upstream-4.0.5+dfsg
Import upstream version 4.0.5+dfsg

Show diffs side-by-side

added added

removed removed

Lines of Context:
 
1
// 
 
2
// NamePicker.cs
 
3
// 
 
4
// Author:
 
5
//      Mansheng Yang <lightyang0@gmail.com>
 
6
// 
 
7
// Copyright (c) 2012 Mansheng Yang <lightyang0@gmail.com>
 
8
// 
 
9
// Permission is hereby granted, free of charge, to any person obtaining a copy
 
10
// of this software and associated documentation files (the "Software"), to deal
 
11
// in the Software without restriction, including without limitation the rights
 
12
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 
13
// copies of the Software, and to permit persons to whom the Software is
 
14
// furnished to do so, subject to the following conditions:
 
15
// 
 
16
// The above copyright notice and this permission notice shall be included in
 
17
// all copies or substantial portions of the Software.
 
18
// 
 
19
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 
20
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 
21
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 
22
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 
23
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 
24
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 
25
// THE SOFTWARE.
 
26
 
 
27
using System.Collections.Generic;
 
28
using System.Linq;
 
29
 
 
30
namespace ICSharpCode.NRefactory.CSharp.Refactoring
 
31
{
 
32
        public static class LocalVariableNamePicker
 
33
        {
 
34
                public static string PickSafeName (AstNode node, IEnumerable<string> candidates)
 
35
                {
 
36
                        var existingNames = new VariableNameCollector ().Collect (node);
 
37
                        return candidates.FirstOrDefault (name => !existingNames.Contains (name));
 
38
                }
 
39
 
 
40
                class VariableNameCollector : DepthFirstAstVisitor
 
41
                {
 
42
                        private ISet<string> variableNames = new HashSet<string> ();
 
43
 
 
44
                        public ISet<string> Collect (AstNode node)
 
45
                        {
 
46
                                variableNames.Clear ();
 
47
                                node.AcceptVisitor (this);
 
48
                                return variableNames;
 
49
                        }
 
50
 
 
51
                        public override void VisitParameterDeclaration (ParameterDeclaration parameterDeclaration)
 
52
                        {
 
53
                                variableNames.Add (parameterDeclaration.Name);
 
54
                                base.VisitParameterDeclaration (parameterDeclaration);
 
55
                        }
 
56
 
 
57
                        public override void VisitVariableInitializer (VariableInitializer variableInitializer)
 
58
                        {
 
59
                                variableNames.Add (variableInitializer.Name);
 
60
                                base.VisitVariableInitializer (variableInitializer);
 
61
                        }
 
62
 
 
63
                        public override void VisitForeachStatement (ForeachStatement foreachStatement)
 
64
                        {
 
65
                                variableNames.Add (foreachStatement.VariableName);
 
66
                                base.VisitForeachStatement (foreachStatement);
 
67
                        }
 
68
                }
 
69
        }
 
70
}