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// Copyright (c) 2010-2013 AlphaSierraPapa for the SharpDevelop Team
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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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// 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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// 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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namespace ICSharpCode.NRefactory.TypeSystem.Implementation
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/// Type reference used to reference nested types.
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public sealed class NestedTypeReference : ITypeReference, ISupportsInterning
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readonly ITypeReference declaringTypeRef;
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readonly int additionalTypeParameterCount;
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/// Creates a new NestedTypeReference.
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/// <param name="declaringTypeRef">Reference to the declaring type.</param>
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/// <param name="name">Name of the nested class</param>
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/// <param name="additionalTypeParameterCount">Number of type parameters on the inner class (without type parameters on baseTypeRef)</param>
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/// <paramref name="declaringTypeRef"/> must be exactly the (unbound) declaring type, not a derived type, not a parameterized type.
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/// NestedTypeReference thus always resolves to a type definition, never to (partially) parameterized types.
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public NestedTypeReference(ITypeReference declaringTypeRef, string name, int additionalTypeParameterCount)
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if (declaringTypeRef == null)
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throw new ArgumentNullException("declaringTypeRef");
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throw new ArgumentNullException("name");
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this.declaringTypeRef = declaringTypeRef;
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this.additionalTypeParameterCount = additionalTypeParameterCount;
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public ITypeReference DeclaringTypeReference {
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get { return declaringTypeRef; }
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public int AdditionalTypeParameterCount {
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get { return additionalTypeParameterCount; }
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public IType Resolve(ITypeResolveContext context)
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ITypeDefinition declaringType = declaringTypeRef.Resolve(context) as ITypeDefinition;
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if (declaringType != null) {
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int tpc = declaringType.TypeParameterCount;
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foreach (IType type in declaringType.NestedTypes) {
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if (type.Name == name && type.TypeParameterCount == tpc + additionalTypeParameterCount)
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return new UnknownType(null, name, additionalTypeParameterCount);
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public override string ToString()
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if (additionalTypeParameterCount == 0)
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return declaringTypeRef + "+" + name;
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return declaringTypeRef + "+" + name + "`" + additionalTypeParameterCount;
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int ISupportsInterning.GetHashCodeForInterning()
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return declaringTypeRef.GetHashCode() ^ name.GetHashCode() ^ additionalTypeParameterCount;
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bool ISupportsInterning.EqualsForInterning(ISupportsInterning other)
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NestedTypeReference o = other as NestedTypeReference;
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return o != null && declaringTypeRef == o.declaringTypeRef && name == o.name && additionalTypeParameterCount == o.additionalTypeParameterCount;