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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using System;
using System.Collections.Generic;
using TypeHashingAlgorithms = Internal.NativeFormat.TypeHashingAlgorithms;
using Interlocked = System.Threading.Interlocked;
using AssemblyName = System.Reflection.AssemblyName;
using Debug = System.Diagnostics.Debug;
namespace Internal.TypeSystem
{
partial class TypeSystemContext
{
private ModuleDesc _generatedAssembly;
public ModuleDesc GeneratedAssembly
{
get
{
if (_generatedAssembly == null)
{
Interlocked.CompareExchange(ref _generatedAssembly, new CompilerGeneratedAssembly(this), null);
}
return _generatedAssembly;
}
}
private class CompilerGeneratedAssembly : ModuleDesc, IAssemblyDesc
{
private MetadataType _globalModuleType;
public CompilerGeneratedAssembly(TypeSystemContext context)
: base(context)
{
_globalModuleType = new CompilerGeneratedType(this, "<Module>");
}
public override IEnumerable<MetadataType> GetAllTypes()
{
return Array.Empty<MetadataType>();
}
public override MetadataType GetGlobalModuleType()
{
return _globalModuleType;
}
public AssemblyName GetName()
{
return new AssemblyName("System.Private.CompilerGenerated");
}
public override MetadataType GetType(string nameSpace, string name, bool throwIfNotFound = true)
{
Debug.Fail("Resolving a TypeRef in the compiler generated assembly?");
if (throwIfNotFound)
ThrowHelper.ThrowTypeLoadException(nameSpace, name, this);
return null;
}
}
/// <summary>
/// A pseudo-type that owns helper methods generated by the compiler.
/// This type should never be allocated (we should never see an EEType for it).
/// </summary>
internal sealed partial class CompilerGeneratedType : MetadataType
{
private int _hashcode;
public CompilerGeneratedType(ModuleDesc module, string name)
{
Module = module;
Name = name;
}
public override TypeSystemContext Context
{
get
{
return Module.Context;
}
}
public override string Name
{
get;
}
public override string Namespace
{
get
{
return "Internal.CompilerGenerated";
}
}
public override int GetHashCode()
{
if (_hashcode != 0)
return _hashcode;
return InitializeHashCode();
}
private int InitializeHashCode()
{
string ns = Namespace;
var hashCodeBuilder = new TypeHashingAlgorithms.HashCodeBuilder(ns);
if (ns.Length > 0)
hashCodeBuilder.Append(".");
hashCodeBuilder.Append(Name);
_hashcode = hashCodeBuilder.ToHashCode();
return _hashcode;
}
public override bool IsCanonicalSubtype(CanonicalFormKind policy)
{
Debug.Assert(!HasInstantiation, "Why is this generic?");
return false;
}
protected override TypeFlags ComputeTypeFlags(TypeFlags mask)
{
return TypeFlags.Class |
TypeFlags.HasGenericVarianceComputed |
TypeFlags.HasStaticConstructorComputed |
TypeFlags.HasFinalizerComputed |
TypeFlags.AttributeCacheComputed;
}
public override ClassLayoutMetadata GetClassLayout()
{
return new ClassLayoutMetadata
{
Offsets = null,
PackingSize = 0,
Size = 0,
};
}
public override bool HasCustomAttribute(string attributeNamespace, string attributeName)
{
return false;
}
public override IEnumerable<MetadataType> GetNestedTypes()
{
return Array.Empty<MetadataType>();
}
public override MetadataType GetNestedType(string name)
{
return null;
}
protected override MethodImplRecord[] ComputeVirtualMethodImplsForType()
{
return Array.Empty<MethodImplRecord>();
}
public override MethodImplRecord[] FindMethodsImplWithMatchingDeclName(string name)
{
return Array.Empty<MethodImplRecord>();
}
public override ModuleDesc Module
{
get;
}
public override PInvokeStringFormat PInvokeStringFormat
{
get
{
return PInvokeStringFormat.AutoClass;
}
}
public override bool IsExplicitLayout
{
get
{
return false;
}
}
public override bool IsSequentialLayout
{
get
{
return false;
}
}
public override bool IsBeforeFieldInit
{
get
{
return false;
}
}
public override MetadataType MetadataBaseType
{
get
{
// Since this type should never be allocated and only serves the purpose of grouping things,
// it can act like a <Module> type and have no base type.
return null;
}
}
public override bool IsSealed
{
get
{
return true;
}
}
public override bool IsAbstract
{
get
{
return false;
}
}
public override DefType ContainingType
{
get
{
return null;
}
}
public override DefType[] ExplicitlyImplementedInterfaces
{
get
{
return Array.Empty<DefType>();
}
}
}
}
}
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