decl.cs

C#编译器源代码。Micorsoft开放源代码

					caching_flags |= Flags.ClsCompliantAttributeTrue;
					return true;
				}
				return false;
			}

			if (Parent.GetClsCompliantAttributeValue ()) {
				caching_flags |= Flags.ClsCompliantAttributeTrue;
				return true;
			}
			return false;
		}

		public override string[] ValidAttributeTargets {
			get { return attribute_targets; }
		}

		protected override bool VerifyClsCompliance (DeclSpace ds)
		{
			if (!base.VerifyClsCompliance (ds)) {
				return false;
			}

			IDictionary cache = TypeManager.AllClsTopLevelTypes;
			string lcase = Name.ToLower (System.Globalization.CultureInfo.InvariantCulture);
			if (!cache.Contains (lcase)) {
				cache.Add (lcase, this);
				return true;
			}

			object val = cache [lcase];
			if (val == null) {
				Type t = AttributeTester.GetImportedIgnoreCaseClsType (lcase);
				if (t == null)
					return true;
				Report.SymbolRelatedToPreviousError (t);
			}
			else {
				if (val is PartialContainer)
					return true;

				Report.SymbolRelatedToPreviousError ((DeclSpace)val);
			}
			Report.Error (3005, Location, "Identifier `{0}' differing only in case is not CLS-compliant", GetSignatureForError ());
			return true;
		}
	}

	/// <summary>
	///   This is a readonly list of MemberInfo's.      
	/// </summary>
	public class MemberList : IList {
		public readonly IList List;
		int count;

		/// <summary>
		///   Create a new MemberList from the given IList.
		/// </summary>
		public MemberList (IList list)
		{
			if (list != null)
				this.List = list;
			else
				this.List = new ArrayList ();
			count = List.Count;
		}

		/// <summary>
		///   Concatenate the ILists `first' and `second' to a new MemberList.
		/// </summary>
		public MemberList (IList first, IList second)
		{
			ArrayList list = new ArrayList ();
			list.AddRange (first);
			list.AddRange (second);
			count = list.Count;
			List = list;
		}

		public static readonly MemberList Empty = new MemberList (new ArrayList ());

		/// <summary>
		///   Cast the MemberList into a MemberInfo[] array.
		/// </summary>
		/// <remarks>
		///   This is an expensive operation, only use it if it's really necessary.
		/// </remarks>
		public static explicit operator MemberInfo [] (MemberList list)
		{
			Timer.StartTimer (TimerType.MiscTimer);
			MemberInfo [] result = new MemberInfo [list.Count];
			list.CopyTo (result, 0);
			Timer.StopTimer (TimerType.MiscTimer);
			return result;
		}

		// ICollection

		public int Count {
			get {
				return count;
			}
		}

		public bool IsSynchronized {
			get {
				return List.IsSynchronized;
			}
		}

		public object SyncRoot {
			get {
				return List.SyncRoot;
			}
		}

		public void CopyTo (Array array, int index)
		{
			List.CopyTo (array, index);
		}

		// IEnumerable

		public IEnumerator GetEnumerator ()
		{
			return List.GetEnumerator ();
		}

		// IList

		public bool IsFixedSize {
			get {
				return true;
			}
		}

		public bool IsReadOnly {
			get {
				return true;
			}
		}

		object IList.this [int index] {
			get {
				return List [index];
			}

			set {
				throw new NotSupportedException ();
			}
		}

		// FIXME: try to find out whether we can avoid the cast in this indexer.
		public MemberInfo this [int index] {
			get {
				return (MemberInfo) List [index];
			}
		}

		public int Add (object value)
		{
			throw new NotSupportedException ();
		}

		public void Clear ()
		{
			throw new NotSupportedException ();
		}

		public bool Contains (object value)
		{
			return List.Contains (value);
		}

		public int IndexOf (object value)
		{
			return List.IndexOf (value);
		}

		public void Insert (int index, object value)
		{
			throw new NotSupportedException ();
		}

		public void Remove (object value)
		{
			throw new NotSupportedException ();
		}

		public void RemoveAt (int index)
		{
			throw new NotSupportedException ();
		}
	}

	/// <summary>
	///   This interface is used to get all members of a class when creating the
	///   member cache.  It must be implemented by all DeclSpace derivatives which
	///   want to support the member cache and by TypeHandle to get caching of
	///   non-dynamic types.
	/// </summary>
	public interface IMemberContainer {
		/// <summary>
		///   The name of the IMemberContainer.  This is only used for
		///   debugging purposes.
		/// </summary>
		string Name {
			get;
		}

		/// <summary>
		///   The type of this IMemberContainer.
		/// </summary>
		Type Type {
			get;
		}

		/// <summary>
		///   Returns the IMemberContainer of the base class or null if this
		///   is an interface or TypeManger.object_type.
		///   This is used when creating the member cache for a class to get all
		///   members from the base class.
		/// </summary>
		MemberCache BaseCache {
			get;
		}

		/// <summary>
		///   Whether this is an interface.
		/// </summary>
		bool IsInterface {
			get;
		}

		/// <summary>
		///   Returns all members of this class with the corresponding MemberTypes
		///   and BindingFlags.
		/// </summary>
		/// <remarks>
		///   When implementing this method, make sure not to return any inherited
		///   members and check the MemberTypes and BindingFlags properly.
		///   Unfortunately, System.Reflection is lame and doesn't provide a way to
		///   get the BindingFlags (static/non-static,public/non-public) in the
		///   MemberInfo class, but the cache needs this information.  That's why
		///   this method is called multiple times with different BindingFlags.
		/// </remarks>
		MemberList GetMembers (MemberTypes mt, BindingFlags bf);

		/// <summary>
		///   Return the container's member cache.
		/// </summary>
		MemberCache MemberCache {
			get;
		}
	}

	/// <summary>
	///   The MemberCache is used by dynamic and non-dynamic types to speed up
	///   member lookups.  It has a member name based hash table; it maps each member
	///   name to a list of CacheEntry objects.  Each CacheEntry contains a MemberInfo
	///   and the BindingFlags that were initially used to get it.  The cache contains
	///   all members of the current class and all inherited members.  If this cache is
	///   for an interface types, it also contains all inherited members.
	///
	///   There are two ways to get a MemberCache:
	///   * if this is a dynamic type, lookup the corresponding DeclSpace and then
	///     use the DeclSpace.MemberCache property.
	///   * if this not a dynamic type, call TypeHandle.GetTypeHandle() to get a
	///     TypeHandle instance for the type and then use TypeHandle.MemberCache.
	/// </summary>
	public class MemberCache {
		public readonly IMemberContainer Container;
		protected Hashtable member_hash;
		protected Hashtable method_hash;

		/// <summary>
		///   Create a new MemberCache for the given IMemberContainer `container'.
		/// </summary>
		public MemberCache (IMemberContainer container)
		{
			this.Container = container;

			Timer.IncrementCounter (CounterType.MemberCache);
			Timer.StartTimer (TimerType.CacheInit);

			// If we have a base class (we have a base class unless we're
			// TypeManager.object_type), we deep-copy its MemberCache here.
			if (Container.BaseCache != null)
				member_hash = SetupCache (Container.BaseCache);
			else
				member_hash = new Hashtable ();

			// If this is neither a dynamic type nor an interface, create a special
			// method cache with all declared and inherited methods.
			Type type = container.Type;
			if (!(type is TypeBuilder) && !type.IsInterface &&
			    (Container.BaseCache == null || Container.BaseCache.method_hash != null)) {
				method_hash = new Hashtable ();
				AddMethods (type);
			}

			// Add all members from the current class.
			AddMembers (Container);

			Timer.StopTimer (TimerType.CacheInit);
		}

		public MemberCache (Type[] ifaces)
		{
			//
			// The members of this cache all belong to other caches.  
			// So, 'Container' will not be used.
			//
			this.Container = null;

			member_hash = new Hashtable ();
			if (ifaces == null)
				return;

			foreach (Type itype in ifaces)
				AddCacheContents (TypeManager.LookupMemberCache (itype));
		}

		/// <summary>
		///   Bootstrap this member cache by doing a deep-copy of our base.
		/// </summary>
		Hashtable SetupCache (MemberCache base_class)
		{
			Hashtable hash = new Hashtable ();

			if (base_class == null)
				return hash;

			IDictionaryEnumerator it = base_class.member_hash.GetEnumerator ();
			while (it.MoveNext ()) {
				hash [it.Key] = ((ArrayList) it.Value).Clone ();
			 }
                                
			return hash;
		}

		/// <summary>
		///   Add the contents of `cache' to the member_hash.
		/// </summary>
		void AddCacheContents (MemberCache cache)
		{
			IDictionaryEnumerator it = cache.member_hash.GetEnumerator ();
			while (it.MoveNext ()) {
				ArrayList list = (ArrayList) member_hash [it.Key];
				if (list == null)
					member_hash [it.Key] = list = new ArrayList ();

				ArrayList entries = (ArrayList) it.Value;
				for (int i = entries.Count-1; i >= 0; i--) {
					CacheEntry entry = (CacheEntry) entries [i];

					if (entry.Container != cache.Container)
						break;
					list.Add (entry);
				}
			}
		}

		/// <summary>
		///   Add all members from class `container' to the cache.
		/// </summary>
		void AddMembers (IMemberContainer container)
		{
			// We need to call AddMembers() with a single member type at a time
			// to get the member type part of CacheEntry.EntryType right.
			if (!container.IsInterface) {
				AddMembers (MemberTypes.Constructor, container);
				AddMembers (MemberTypes.Field, container);
			}
			AddMembers (MemberTypes.Method, container);
			AddMembers (MemberTypes.Property, container);
			AddMembers (MemberTypes.Event, container);
			// Nested types are returned by both Static and Instance searches.
			AddMembers (MemberTypes.NestedType,
				    BindingFlags.Static | BindingFlags.Public, container);
			AddMembers (MemberTypes.NestedType,
				    BindingFlags.Static | BindingFlags.NonPublic, container);
		}

		void AddMembers (MemberTypes mt, IMemberContainer container)
		{
			AddMembers (mt, BindingFlags.Static | BindingFlags.Public, container);
			AddMembers (mt, BindingFlags.Static | BindingFlags.NonPublic, container);
			AddMembers (mt, BindingFlags.Instance | BindingFlags.Public, container);
			AddMembers (mt, BindingFlags.Instance | BindingFlags.NonPublic, container);
		}

		/// <summary>
		///   Add all members from class `container' with the requested MemberTypes and
		///   BindingFlags to the cache.  This method is called multiple times with different
		///   MemberTypes and BindingFlags.
		/// </summary>
		void AddMembers (MemberTypes mt, BindingFlags bf, IMemberContainer container)
		{
			MemberList members = container.GetMembers (mt, bf);

			foreach (MemberInfo member in members) {
				string name = member.Name;

				// We use a name-based hash table of ArrayList's.
				ArrayList list = (ArrayList) member_hash [name];
				if (list == null) {
					list = new ArrayList ();
					member_hash.Add (name, list);
				}

				// When this method is called for the current class, the list will
				// already contain all inherited members from our base classes.
				// We cannot add new members in front of the list since this'd be an
				// expensive operation, that's why the list is sorted in reverse order
				// (ie. members from the current class are coming last).
				list.Add (new CacheEntry (container, member, mt, bf));
			}
		}

		/// <summary>
		///   Add all declared and inherited methods from class `type' to the method cache.
		/// </summary>
		void AddMethods (Type type)
		{
			AddMethods (BindingFlags.Static | BindingFlags.Public |
				    BindingFlags.FlattenHierarchy, type);
			AddMethods (BindingFlags.Static | BindingFlags.NonPublic |
				    BindingFlags.FlattenHierarchy, type);
			AddMethods (BindingFlags.Instance | BindingFlags.Public, type);
			AddMethods (BindingFlags.Instance | BindingFlags.NonPublic, type);
		}

		static ArrayList overrides = new ArrayList ();

		void AddMethods (BindingFlags bf, Type type)
		{
			MethodBase [] members = type.GetMethods (bf);

                        Array.Reverse (members);

			foreach (MethodBase member in members) {
				string name = member.Name;

				// We use a name-based hash table of ArrayList's.
				ArrayList list = (ArrayList) method_hash [name];
				if (list == null) {
					list = new ArrayList ();
					method_hash.Add (name, list);
				}

				MethodInfo curr = (MethodInfo) member;
				while (curr.IsVirtual && (curr.Attributes & MethodAttributes.NewSlot) == 0) {
					MethodInfo base_method = curr.GetBaseDefinition ();

					if (base_method == curr)
						// Not every virtual function needs to have a NewSlot flag.
						break;

					overrides.Add (curr);
					list.Add (new CacheEntry (null, base_method, MemberTypes.Method, bf));
					curr = base_method;
				}

				if (overrides.Count > 0) {
					for (int i = 0; i < overrides.Count; ++i)
						TypeManager.RegisterOverride ((MethodBase) overrides [i], curr);
					overrides.Clear ();
				}

				// Unfortunately, the elements returned by Type.GetMethods() aren't
				// sorted so we need to do this check for every member.
				BindingFlags new_bf = bf;
				if (member.DeclaringType == type)
					new_bf |= BindingFlags.DeclaredOnly;

				list.Add (new CacheEntry (Container, member, MemberTypes.Method, new_bf));
			}
		}

		/// <summary>
		///   Compute and return a appropriate `EntryType' magic number for the given
		///   MemberTypes and BindingFlags.
		/// </summary>
		protected static EntryType GetEntryType (MemberTypes mt, BindingFlags bf)
		{
			EntryType type = EntryType.None;

			if ((mt & MemberTypes.Constructor) != 0)
				type |= EntryType.Constructor;
			if ((mt & MemberTypes.Event) != 0)
				type |= EntryType.Event;
			if ((mt & MemberTypes.Field) != 0)
				type |= EntryType.Field;
			if ((mt & MemberTypes.Method) != 0)
				type |= EntryType.Method;
			if ((mt & MemberTypes.Property) != 0)
				type |= EntryType.Property;
			// Nested types are returned by static and instance searches.
			if ((mt & MemberTypes.NestedType) != 0)
				type |= EntryType.NestedType | EntryType.Static | EntryType.Instance;

			if ((bf & BindingFlags.Instance) != 0)
				type |= EntryType.Instance;
			if ((bf & BindingFlags.Static) != 0)
				type |= EntryType.Static;
			if ((bf & BindingFlags.Public) != 0)
				type |= EntryType.Public;
			if ((bf & BindingFlags.NonPublic) != 0)
				type |= EntryType.NonPublic;
			if ((bf & BindingFlags.DeclaredOnly) != 0)
				type |= EntryType.Declared;

			return type;
		}