← Back to branch summary

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

« back to all changes in this revision

Viewing changes to contrib/ICSharpCode.NRefactory.CSharp/TypeSystem/AttributeTypeReference.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:
contrib/ICSharpCode.NRefactory.CSharp/TypeSystem/AttributeTypeReference.cs
1
 
// Copyright (c) AlphaSierraPapa for the SharpDevelop Team
2
 
// 
3
 
// Permission is hereby granted, free of charge, to any person obtaining a copy of this
4
 
// software and associated documentation files (the "Software"), to deal in the Software
5
 
// without restriction, including without limitation the rights to use, copy, modify, merge,
6
 
// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
7
 
// to whom the Software is furnished to do so, subject to the following conditions:
8
 
// 
9
 
// The above copyright notice and this permission notice shall be included in all copies or
10
 
// substantial portions of the Software.
11
 
// 
12
 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
13
 
// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
14
 
// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
15
 
// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
16
 
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
17
 
// DEALINGS IN THE SOFTWARE.
18
 
 
19
 
using System;
20
 
using System.Collections.Generic;
21
 
using System.Collections.ObjectModel;
22
 
using System.Diagnostics;
23
 
using System.Linq;
24
 
 
25
 
using ICSharpCode.NRefactory.Semantics;
26
 
using ICSharpCode.NRefactory.TypeSystem;
27
 
using ICSharpCode.NRefactory.TypeSystem.Implementation;
28
 
 
29
 
namespace ICSharpCode.NRefactory.CSharp.TypeSystem
30
 
{
31
 
        /// <summary>
32
 
        /// Type reference used within an attribute.
33
 
        /// Looks up both 'withoutSuffix' and 'withSuffix' and returns the type that exists.
34
 
        /// </summary>
35
 
        [Serializable]
36
 
        public sealed class AttributeTypeReference : ITypeReference, ISupportsInterning
37
 
        {
38
 
                ITypeReference withoutSuffix, withSuffix;
39
 
                
40
 
                public AttributeTypeReference(ITypeReference withoutSuffix, ITypeReference withSuffix)
41
 
                {
42
 
                        if (withoutSuffix == null)
43
 
                                throw new ArgumentNullException("withoutSuffix");
44
 
                        if (withSuffix == null)
45
 
                                throw new ArgumentNullException("withSuffix");
46
 
                        this.withoutSuffix = withoutSuffix;
47
 
                        this.withSuffix = withSuffix;
48
 
                }
49
 
                
50
 
                public IType Resolve(ITypeResolveContext context)
51
 
                {
52
 
                        IType t1 = withoutSuffix.Resolve(context);
53
 
                        IType t2 = withSuffix.Resolve(context);
54
 
                        return PreferAttributeTypeWithSuffix(t1, t2, context.Compilation) ? t2 : t1;
55
 
                }
56
 
                
57
 
                internal static bool PreferAttributeTypeWithSuffix(IType t1, IType t2, ICompilation compilation)
58
 
                {
59
 
                        if (t2.Kind == TypeKind.Unknown) return false;
60
 
                        if (t1.Kind == TypeKind.Unknown) return true;
61
 
                        
62
 
                        var attrTypeDef = compilation.FindType(KnownTypeCode.Attribute).GetDefinition();
63
 
                        if (attrTypeDef != null) {
64
 
                                bool t1IsAttribute = (t1.GetDefinition() != null && t1.GetDefinition().IsDerivedFrom(attrTypeDef));
65
 
                                bool t2IsAttribute = (t2.GetDefinition() != null && t2.GetDefinition().IsDerivedFrom(attrTypeDef));
66
 
                                if (t2IsAttribute && !t1IsAttribute)
67
 
                                        return true;
68
 
                                // If both types exist and are attributes, C# considers that to be an ambiguity, but we are less strict.
69
 
                        }
70
 
                        return false;
71
 
                }
72
 
                
73
 
                public override string ToString()
74
 
                {
75
 
                        return withoutSuffix.ToString() + "[Attribute]";
76
 
                }
77
 
                
78
 
                void ISupportsInterning.PrepareForInterning(IInterningProvider provider)
79
 
                {
80
 
                        withoutSuffix = provider.Intern(withoutSuffix);
81
 
                        withSuffix = provider.Intern(withSuffix);
82
 
                }
83
 
                
84
 
                int ISupportsInterning.GetHashCodeForInterning()
85
 
                {
86
 
                        unchecked {
87
 
                                return withoutSuffix.GetHashCode() + 715613 * withSuffix.GetHashCode();
88
 
                        }
89
 
                }
90
 
                
91
 
                bool ISupportsInterning.EqualsForInterning(ISupportsInterning other)
92
 
                {
93
 
                        AttributeTypeReference atr = other as AttributeTypeReference;
94
 
                        return atr != null && this.withoutSuffix == atr.withoutSuffix && this.withSuffix == atr.withSuffix;
95
 
                }
96
 
        }
97
 
}