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// Copyright (c) Microsoft. All rights reserved.
// Licensed under the MIT license. See LICENSE file in the project root for full license information.
/*=============================================================================
**
**
**
**
**
** Purpose: Notion of a type definition
**
**
=============================================================================*/
namespace System.Reflection
{
using System;
using System.Runtime.CompilerServices;
using System.Collections.Generic;
using System.Diagnostics.Contracts;
//all today's runtime Type derivations derive now from TypeInfo
//we make TypeInfo implement IRCT - simplifies work
[System.Runtime.InteropServices.ComVisible(true)]
[Serializable]
public abstract class TypeInfo:Type,IReflectableType
{
[FriendAccessAllowed]
internal TypeInfo() { }
TypeInfo IReflectableType.GetTypeInfo(){
return this;
}
public virtual Type AsType(){
return (Type)this;
}
public virtual Type[] GenericTypeParameters{
get{
if(IsGenericTypeDefinition){
return GetGenericArguments();
}
else{
return Type.EmptyTypes;
}
}
}
//a re-implementation of ISAF from Type, skipping the use of UnderlyingType
[Pure]
public virtual bool IsAssignableFrom(TypeInfo typeInfo)
{
if (typeInfo == null)
return false;
if (this == typeInfo)
return true;
// If c is a subclass of this class, then c can be cast to this type.
if (typeInfo.IsSubclassOf(this))
return true;
if (this.IsInterface)
{
return typeInfo.ImplementInterface(this);
}
else if (IsGenericParameter)
{
Type[] constraints = GetGenericParameterConstraints();
for (int i = 0; i < constraints.Length; i++)
if (!constraints[i].IsAssignableFrom(typeInfo))
return false;
return true;
}
return false;
}
#region moved over from Type
// Fields
public virtual EventInfo GetDeclaredEvent(String name)
{
return GetEvent(name, Type.DeclaredOnlyLookup);
}
public virtual FieldInfo GetDeclaredField(String name)
{
return GetField(name, Type.DeclaredOnlyLookup);
}
public virtual MethodInfo GetDeclaredMethod(String name)
{
return GetMethod(name, Type.DeclaredOnlyLookup);
}
public virtual IEnumerable<MethodInfo> GetDeclaredMethods(String name)
{
foreach (MethodInfo method in GetMethods(Type.DeclaredOnlyLookup))
{
if (method.Name == name)
yield return method;
}
}
public virtual System.Reflection.TypeInfo GetDeclaredNestedType(String name)
{
var nt=GetNestedType(name, Type.DeclaredOnlyLookup);
if(nt == null){
return null; //the extension method GetTypeInfo throws for null
}else{
return nt.GetTypeInfo();
}
}
public virtual PropertyInfo GetDeclaredProperty(String name)
{
return GetProperty(name, Type.DeclaredOnlyLookup);
}
// Properties
public virtual IEnumerable<ConstructorInfo> DeclaredConstructors
{
get
{
return GetConstructors(Type.DeclaredOnlyLookup);
}
}
public virtual IEnumerable<EventInfo> DeclaredEvents
{
get
{
return GetEvents(Type.DeclaredOnlyLookup);
}
}
public virtual IEnumerable<FieldInfo> DeclaredFields
{
get
{
return GetFields(Type.DeclaredOnlyLookup);
}
}
public virtual IEnumerable<MemberInfo> DeclaredMembers
{
get
{
return GetMembers(Type.DeclaredOnlyLookup);
}
}
public virtual IEnumerable<MethodInfo> DeclaredMethods
{
get
{
return GetMethods(Type.DeclaredOnlyLookup);
}
}
public virtual IEnumerable<System.Reflection.TypeInfo> DeclaredNestedTypes
{
get
{
foreach (var t in GetNestedTypes(Type.DeclaredOnlyLookup)){
yield return t.GetTypeInfo();
}
}
}
public virtual IEnumerable<PropertyInfo> DeclaredProperties
{
get
{
return GetProperties(Type.DeclaredOnlyLookup);
}
}
public virtual IEnumerable<Type> ImplementedInterfaces
{
get
{
return GetInterfaces();
}
}
#endregion
}
}
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