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Viewing changes to contrib/ICSharpCode.NRefactory.CSharp/TypeSystem/TypeOrNamespaceReference.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

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contrib/ICSharpCode.NRefactory.CSharp/TypeSystem/TypeOrNamespaceReference.cs
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// Copyright (c) AlphaSierraPapa for the SharpDevelop Team
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// 
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// Permission is hereby granted, free of charge, to any person obtaining a copy of this
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// software and associated documentation files (the "Software"), to deal in the Software
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// without restriction, including without limitation the rights to use, copy, modify, merge,
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// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
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// to whom the Software is furnished to do so, subject to the following conditions:
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// 
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// The above copyright notice and this permission notice shall be included in all copies or
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// substantial portions of the Software.
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// 
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
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// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
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// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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using System;
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using ICSharpCode.NRefactory.CSharp.Resolver;
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using ICSharpCode.NRefactory.Semantics;
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using ICSharpCode.NRefactory.TypeSystem;
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namespace ICSharpCode.NRefactory.CSharp.TypeSystem
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{
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        /// <summary>
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        /// Represents a reference which could point to a type or namespace.
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        /// </summary>
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        [Serializable]
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        public abstract class TypeOrNamespaceReference : ITypeReference
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        {
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                /// <summary>
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                /// Resolves the reference and returns the ResolveResult.
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                /// </summary>
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                public abstract ResolveResult Resolve(CSharpResolver resolver);
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                /// <summary>
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                /// Returns the namespace that is referenced; or null if no such namespace is found.
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                /// </summary>
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                public INamespace ResolveNamespace(CSharpResolver resolver)
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                {
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                        NamespaceResolveResult nrr = Resolve(resolver) as NamespaceResolveResult;
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                        return nrr != null ? nrr.Namespace : null;
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                }
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                /// <summary>
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                /// Returns the type that is referenced; or <see cref="SpecialType.UnknownType"/> if the type isn't found.
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                /// </summary>
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                public IType ResolveType(CSharpResolver resolver)
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                {
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                        TypeResolveResult trr = Resolve(resolver) as TypeResolveResult;
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                        return trr != null ? trr.Type : SpecialType.UnknownType;
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                }
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                IType ITypeReference.Resolve(ITypeResolveContext context)
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                {
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                        // Strictly speaking, we might have to resolve the type in a nested compilation, similar
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                        // to what we're doing with ConstantExpression.
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                        // However, in almost all cases this will work correctly - if the resulting type is only available in the
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                        // nested compilation and not in this, we wouldn't be able to map it anyways.
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                        var ctx = context as CSharpTypeResolveContext;
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                        if (ctx == null) {
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                                ctx = new CSharpTypeResolveContext(context.CurrentAssembly ?? context.Compilation.MainAssembly, null, context.CurrentTypeDefinition, context.CurrentMember);
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                        }
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                        return ResolveType(new CSharpResolver(ctx));
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                        // A potential issue might be this scenario:
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                        // Assembly 1:
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                        //  class A { public class Nested {} }
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                        // Assembly 2: (references asm 1)
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                        //  class B : A {}
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                        // Assembly 3: (references asm 1 and 2)
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                        //  class C { public B.Nested Field; }
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                        // Assembly 4: (references asm 1 and 3, but not 2):
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                        //  uses C.Field;
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                        // Here we would not be able to resolve 'B.Nested' in the compilation of assembly 4, as type B is missing there.
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                }
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        }
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}