mirror of
https://github.com/AssetRipper/ILSpy.git
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343 lines
10 KiB
C#
343 lines
10 KiB
C#
// Copyright (c) 2010-2013 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 System.Collections.Generic;
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using System.Text;
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namespace ICSharpCode.Decompiler.TypeSystem
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{
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/// <summary>
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/// Holds the full name of a type definition.
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/// A full type name uniquely identifies a type definition within a single assembly.
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/// </summary>
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/// <remarks>
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/// A full type name can only represent type definitions, not arbitrary types.
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/// It does not include any type arguments, and can not refer to array or pointer types.
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///
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/// A full type name represented as reflection name has the syntax:
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/// <c>NamespaceName '.' TopLevelTypeName ['`'#] { '+' NestedTypeName ['`'#] }</c>
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/// </remarks>
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[Serializable]
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public readonly struct FullTypeName : IEquatable<FullTypeName>
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{
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[Serializable]
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readonly struct NestedTypeName
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{
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public readonly string Name;
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public readonly int AdditionalTypeParameterCount;
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public NestedTypeName(string name, int additionalTypeParameterCount)
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{
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if (name == null)
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throw new ArgumentNullException(nameof(name));
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this.Name = name;
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this.AdditionalTypeParameterCount = additionalTypeParameterCount;
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}
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}
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readonly TopLevelTypeName topLevelType;
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readonly NestedTypeName[] nestedTypes;
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FullTypeName(TopLevelTypeName topLevelTypeName, NestedTypeName[] nestedTypes)
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{
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this.topLevelType = topLevelTypeName;
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this.nestedTypes = nestedTypes;
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}
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/// <summary>
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/// Constructs a FullTypeName representing the given top-level type.
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/// </summary>
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/// <remarks>
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/// FullTypeName has an implicit conversion operator from TopLevelTypeName,
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/// so you can simply write:
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/// <c>FullTypeName f = new TopLevelTypeName(...);</c>
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/// </remarks>
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public FullTypeName(TopLevelTypeName topLevelTypeName)
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{
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this.topLevelType = topLevelTypeName;
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this.nestedTypes = null;
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}
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/// <summary>
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/// Constructs a FullTypeName by parsing the given reflection name.
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/// Note that FullTypeName can only represent type definition names. If the reflection name
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/// might refer to a parameterized type or array etc., use
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/// <see cref="ReflectionHelper.ParseReflectionName(string)"/> instead.
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/// </summary>
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/// <remarks>
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/// Expected syntax: <c>NamespaceName '.' TopLevelTypeName ['`'#] { '+' NestedTypeName ['`'#] }</c>
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/// where # are type parameter counts
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/// </remarks>
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public FullTypeName(string reflectionName)
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{
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int pos = reflectionName.IndexOf('+');
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if (pos < 0)
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{
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// top-level type
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this.topLevelType = new TopLevelTypeName(reflectionName);
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this.nestedTypes = null;
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}
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else
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{
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// nested type
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string[] parts = reflectionName.Split('+');
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this.topLevelType = new TopLevelTypeName(parts[0]);
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this.nestedTypes = new NestedTypeName[parts.Length - 1];
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for (int i = 0; i < nestedTypes.Length; i++)
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{
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int tpc;
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string name = ReflectionHelper.SplitTypeParameterCountFromReflectionName(parts[i + 1], out tpc);
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nestedTypes[i] = new NestedTypeName(name, tpc);
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}
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}
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}
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/// <summary>
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/// Gets the top-level type name.
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/// </summary>
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public TopLevelTypeName TopLevelTypeName {
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get { return topLevelType; }
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}
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/// <summary>
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/// Gets whether this is a nested type.
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/// </summary>
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public bool IsNested {
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get {
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return nestedTypes != null;
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}
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}
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/// <summary>
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/// Gets the nesting level.
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/// </summary>
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public int NestingLevel {
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get {
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return nestedTypes != null ? nestedTypes.Length : 0;
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}
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}
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/// <summary>
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/// Gets the name of the type.
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/// For nested types, this is the name of the innermost type.
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/// </summary>
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public string Name {
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get {
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if (nestedTypes != null)
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return nestedTypes[nestedTypes.Length - 1].Name;
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else
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return topLevelType.Name;
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}
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}
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public string ReflectionName {
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get {
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if (nestedTypes == null)
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return topLevelType.ReflectionName;
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StringBuilder b = new StringBuilder(topLevelType.ReflectionName);
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foreach (NestedTypeName nt in nestedTypes)
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{
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b.Append('+');
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b.Append(nt.Name);
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if (nt.AdditionalTypeParameterCount > 0)
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{
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b.Append('`');
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b.Append(nt.AdditionalTypeParameterCount);
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}
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}
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return b.ToString();
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}
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}
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public string FullName {
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get {
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if (nestedTypes == null)
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return topLevelType.Namespace + "." + topLevelType.Name;
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StringBuilder b = new StringBuilder(topLevelType.Namespace);
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b.Append('.');
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b.Append(topLevelType.Name);
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foreach (NestedTypeName nt in nestedTypes)
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{
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b.Append('.');
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b.Append(nt.Name);
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}
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return b.ToString();
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}
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}
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/// <summary>
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/// Gets the total type parameter count.
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/// </summary>
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public int TypeParameterCount {
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get {
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int tpc = topLevelType.TypeParameterCount;
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if (nestedTypes != null)
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{
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foreach (var nt in nestedTypes)
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{
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tpc += nt.AdditionalTypeParameterCount;
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}
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}
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return tpc;
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}
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}
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/// <summary>
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/// Gets the name of the nested type at the given level.
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/// </summary>
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public string GetNestedTypeName(int nestingLevel)
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{
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if (nestedTypes == null)
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throw new InvalidOperationException();
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return nestedTypes[nestingLevel].Name;
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}
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/// <summary>
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/// Gets the number of additional type parameters of the nested type at the given level.
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/// </summary>
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public int GetNestedTypeAdditionalTypeParameterCount(int nestingLevel)
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{
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if (nestedTypes == null)
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throw new InvalidOperationException();
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return nestedTypes[nestingLevel].AdditionalTypeParameterCount;
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}
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/// <summary>
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/// Gets the declaring type name.
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/// </summary>
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/// <exception cref="InvalidOperationException">This is a top-level type name.</exception>
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/// <example><c>new FullTypeName("NS.A+B+C").GetDeclaringType()</c> will return <c>new FullTypeName("NS.A+B")</c></example>
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public FullTypeName GetDeclaringType()
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{
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if (nestedTypes == null)
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throw new InvalidOperationException();
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if (nestedTypes.Length == 1)
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return topLevelType;
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NestedTypeName[] outerNestedTypeNames = new NestedTypeName[nestedTypes.Length - 1];
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Array.Copy(nestedTypes, 0, outerNestedTypeNames, 0, outerNestedTypeNames.Length);
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return new FullTypeName(topLevelType, outerNestedTypeNames);
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}
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/// <summary>
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/// Creates a nested type name.
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/// </summary>
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/// <example><c>new FullTypeName("NS.A+B").NestedType("C", 1)</c> will return <c>new FullTypeName("NS.A+B+C`1")</c></example>
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public FullTypeName NestedType(string name, int additionalTypeParameterCount)
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{
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if (name == null)
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throw new ArgumentNullException(nameof(name));
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var newNestedType = new NestedTypeName(name, additionalTypeParameterCount);
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if (nestedTypes == null)
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return new FullTypeName(topLevelType, new[] { newNestedType });
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NestedTypeName[] newNestedTypeNames = new NestedTypeName[nestedTypes.Length + 1];
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nestedTypes.CopyTo(newNestedTypeNames, 0);
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newNestedTypeNames[newNestedTypeNames.Length - 1] = newNestedType;
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return new FullTypeName(topLevelType, newNestedTypeNames);
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}
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public static implicit operator FullTypeName(TopLevelTypeName topLevelTypeName)
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{
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return new FullTypeName(topLevelTypeName);
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}
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public override string ToString()
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{
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return this.ReflectionName;
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}
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#region Equals and GetHashCode implementation
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public override bool Equals(object obj)
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{
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return obj is FullTypeName && Equals((FullTypeName)obj);
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}
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public bool Equals(FullTypeName other)
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{
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return FullTypeNameComparer.Ordinal.Equals(this, other);
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}
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public override int GetHashCode()
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{
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return FullTypeNameComparer.Ordinal.GetHashCode(this);
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}
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public static bool operator ==(FullTypeName left, FullTypeName right)
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{
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return left.Equals(right);
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}
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public static bool operator !=(FullTypeName left, FullTypeName right)
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{
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return !left.Equals(right);
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}
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#endregion
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}
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[Serializable]
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public sealed class FullTypeNameComparer : IEqualityComparer<FullTypeName>
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{
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public static readonly FullTypeNameComparer Ordinal = new FullTypeNameComparer(StringComparer.Ordinal);
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public static readonly FullTypeNameComparer OrdinalIgnoreCase = new FullTypeNameComparer(StringComparer.OrdinalIgnoreCase);
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public readonly StringComparer NameComparer;
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public FullTypeNameComparer(StringComparer nameComparer)
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{
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this.NameComparer = nameComparer;
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}
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public bool Equals(FullTypeName x, FullTypeName y)
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{
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if (x.NestingLevel != y.NestingLevel)
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return false;
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TopLevelTypeName topX = x.TopLevelTypeName;
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TopLevelTypeName topY = y.TopLevelTypeName;
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if (topX.TypeParameterCount == topY.TypeParameterCount
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&& NameComparer.Equals(topX.Name, topY.Name)
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&& NameComparer.Equals(topX.Namespace, topY.Namespace))
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{
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for (int i = 0; i < x.NestingLevel; i++)
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{
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if (x.GetNestedTypeAdditionalTypeParameterCount(i) != y.GetNestedTypeAdditionalTypeParameterCount(i))
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return false;
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if (!NameComparer.Equals(x.GetNestedTypeName(i), y.GetNestedTypeName(i)))
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return false;
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}
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return true;
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}
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return false;
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}
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public int GetHashCode(FullTypeName obj)
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{
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TopLevelTypeName top = obj.TopLevelTypeName;
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int hash = NameComparer.GetHashCode(top.Name) ^ NameComparer.GetHashCode(top.Namespace) ^ top.TypeParameterCount;
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unchecked
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{
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for (int i = 0; i < obj.NestingLevel; i++)
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{
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hash *= 31;
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hash += NameComparer.GetHashCode(obj.Name) ^ obj.TypeParameterCount;
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}
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}
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return hash;
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}
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}
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}
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