{
Report.Warning (
109, Location,
- "The member `" + parent.Name + "." + Name + "' does not hide an " +
+ "The member " + parent.MakeName (Name) + " does not hide an " +
"inherited member. The keyword new is not required");
}
- static string MethodBaseName (MethodBase mb)
- {
- return "`" + mb.ReflectedType.Name + "." + mb.Name + "'";
- }
-
- void Error_CannotChangeAccessModifiers (TypeContainer parent, MethodInfo parent_method)
+ void Error_CannotChangeAccessModifiers (TypeContainer parent, MethodInfo parent_method,
+ string name)
{
//
// FIXME: report the old/new permissions?
//
Report.Error (
- 507, "`" + parent_method + "." + Name +
- ": can't change the access modifiers from `" +
- parent_method.DeclaringType.Name + "." + parent_method.Name + "'");
+ 507, Location, parent.MakeName (Name) +
+ ": can't change the access modifiers when overriding inherited " +
+ "member `" + name + "'");
}
//
// `name' is the user visible name for reporting errors (this is used to
// provide the right name regarding method names and properties)
//
- protected bool CheckMethodAgainstBase (TypeContainer parent,
- MethodAttributes my_attrs, MethodInfo mb)
+ protected bool CheckMethodAgainstBase (TypeContainer parent, MethodAttributes my_attrs,
+ MethodInfo mb, string name)
{
bool ok = true;
if (!(mb.IsAbstract || mb.IsVirtual)){
Report.Error (
506, Location, parent.MakeName (Name) +
- ": cannot override inherited member " +
- MethodBaseName (mb) + " because it is not " +
+ ": cannot override inherited member `" +
+ name + "' because it is not " +
"virtual, abstract or override");
ok = false;
}
if (mb.IsFinal) {
Report.Error (239, Location, parent.MakeName (Name) + " : cannot " +
- "override inherited member " + MethodBaseName (mb) +
- " because it is sealed.");
+ "override inherited member `" + name +
+ "' because it is sealed.");
ok = false;
}
-
//
// Check that the permissions are not being changed
//
MethodAttributes thisp = my_attrs & MethodAttributes.MemberAccessMask;
MethodAttributes parentp = mb.Attributes & MethodAttributes.MemberAccessMask;
- if (thisp != parentp){
- Error_CannotChangeAccessModifiers (parent, mb);
- ok = false;
+ //
+ // special case for "protected internal"
+ //
+
+ if ((parentp & MethodAttributes.FamORAssem) == MethodAttributes.FamORAssem){
+ //
+ // when overriding protected internal, the method can be declared
+ // protected internal only within the same assembly
+ //
+
+ if ((thisp & MethodAttributes.FamORAssem) == MethodAttributes.FamORAssem){
+ if (parent.TypeBuilder.Assembly != mb.DeclaringType.Assembly){
+ //
+ // assemblies differ - report an error
+ //
+
+ Error_CannotChangeAccessModifiers (parent, mb, name);
+ ok = false;
+ } else if (thisp != parentp) {
+ //
+ // same assembly, but other attributes differ - report an error
+ //
+
+ Error_CannotChangeAccessModifiers (parent, mb, name);
+ ok = false;
+ };
+ } else if ((thisp & MethodAttributes.Family) != MethodAttributes.Family) {
+ //
+ // if it's not "protected internal", it must be "protected"
+ //
+
+ Error_CannotChangeAccessModifiers (parent, mb, name);
+ ok = false;
+ } else if (parent.TypeBuilder.Assembly == mb.DeclaringType.Assembly) {
+ //
+ // protected within the same assembly - an error
+ //
+ Error_CannotChangeAccessModifiers (parent, mb, name);
+ ok = false;
+ } else if ((thisp & ~(MethodAttributes.Family | MethodAttributes.FamORAssem)) !=
+ (parentp & ~(MethodAttributes.Family | MethodAttributes.FamORAssem))) {
+ //
+ // protected ok, but other attributes differ - report an error
+ //
+ Error_CannotChangeAccessModifiers (parent, mb, name);
+ ok = false;
+ }
+ } else {
+ if (thisp != parentp){
+ Error_CannotChangeAccessModifiers (parent, mb, name);
+ ok = false;
+ }
}
}
if (mb.IsVirtual || mb.IsAbstract){
if ((ModFlags & (Modifiers.NEW | Modifiers.OVERRIDE)) == 0){
- if (Name != "Finalize" && (RootContext.WarningLevel >= 2)){
+ if (Name != "Finalize"){
Report.Warning (
- 114, Location, parent.MakeName (Name) +
- " hides inherited member " + MethodBaseName (mb) +
- ". To make the current member override that " +
+ 114, 2, Location, parent.MakeName (Name) +
+ " hides inherited member `" + name +
+ "'. To make the current member override that " +
"implementation, add the override keyword, " +
"otherwise use the new keyword");
+ ModFlags |= Modifiers.NEW;
+ }
+ }
+ } else {
+ if ((ModFlags & (Modifiers.NEW | Modifiers.OVERRIDE)) == 0){
+ if (Name != "Finalize"){
+ Report.Warning (
+ 108, 1, Location, "The keyword new is required on " +
+ parent.MakeName (Name) + " because it hides " +
+ "inherited member `" + name + "'");
+ ModFlags |= Modifiers.NEW;
}
}
}
/// Returns a status code based purely on the name
/// of the member being added
/// </summary>
- protected AdditionResult IsValid (string name)
+ protected AdditionResult IsValid (string basename, string name)
{
- if (name == Basename)
+ if (basename == Basename)
return AdditionResult.EnclosingClash;
if (defined_names.Contains (name))
return AdditionResult.Success;
}
+ public static int length;
+ public static int small;
+
/// <summary>
/// Introduce @name into this declaration space and
/// associates it with the object @o. Note that for
protected void DefineName (string name, object o)
{
defined_names.Add (name, o);
+
+#if DEBUGME
+ int p = name.LastIndexOf (".");
+ int l = name.Length;
+ length += l;
+ small += l -p;
+#endif
}
/// <summary>
/// <remarks>
public abstract TypeBuilder DefineType ();
+ /// <summary>
+ /// Define all members, but don't apply any attributes or do anything which may
+ /// access not-yet-defined classes. This method also creates the MemberCache.
+ /// </summary>
+ public abstract bool DefineMembers (TypeContainer parent);
+
//
// Whether this is an `unsafe context'
//
public static string MakeFQN (string nsn, string name)
{
- string prefix = (nsn == "" ? "" : nsn + ".");
-
- return prefix + name;
+ if (nsn == "")
+ return name;
+ return String.Concat (nsn, ".", name);
}
EmitContext type_resolve_ec;
{
type_resolve_ec = new EmitContext (parent, this, loc, null, null, ModFlags, false);
type_resolve_ec.ResolvingTypeTree = true;
- type_resolve_ec.OnlyLookupTypes = true;
return type_resolve_ec;
}
if (type_resolve_ec == null)
type_resolve_ec = GetTypeResolveEmitContext (parent, loc);
type_resolve_ec.loc = loc;
- Expression d = e.Resolve (type_resolve_ec);
+ type_resolve_ec.ContainerType = TypeBuilder;
+
+ int errors = Report.Errors;
+ Expression d = e.ResolveAsTypeTerminal (type_resolve_ec);
+
if (d == null || d.eclass != ExprClass.Type){
- if (!silent){
+ if (!silent && errors == Report.Errors){
Report.Error (246, loc, "Cannot find type `"+ e.ToString () +"'");
}
return null;
}
+ if (!CheckAccessLevel (d.Type)) {
+ Report. Error (122, loc, "`" + d.Type + "' " +
+ "is inaccessible because of its protection level");
+ return null;
+ }
+
return d.Type;
}
{
if (type_resolve_ec == null)
type_resolve_ec = GetTypeResolveEmitContext (parent, loc);
+ type_resolve_ec.loc = loc;
+ type_resolve_ec.ContainerType = TypeBuilder;
- Expression d = e.Resolve (type_resolve_ec);
+ Expression d = e.ResolveAsTypeTerminal (type_resolve_ec);
+
if (d == null || d.eclass != ExprClass.Type){
if (!silent){
Report.Error (246, loc, "Cannot find type `"+ e +"'");
return d;
}
+ public bool CheckAccessLevel (Type check_type)
+ {
+ if (check_type == TypeBuilder)
+ return true;
+
+ TypeAttributes check_attr = check_type.Attributes & TypeAttributes.VisibilityMask;
+
+ //
+ // Broken Microsoft runtime, return public for arrays, no matter what
+ // the accessibility is for their underlying class, and they return
+ // NonPublic visibility for pointers
+ //
+ if (check_type.IsArray || check_type.IsPointer)
+ return CheckAccessLevel (check_type.GetElementType ());
+
+ if (check_attr == TypeAttributes.Public)
+ return true;
+
+ if (check_attr == TypeAttributes.NestedPublic)
+ return true;
+
+ if (check_attr == TypeAttributes.NestedPrivate){
+ string check_type_name = check_type.FullName;
+ string type_name = TypeBuilder.FullName;
+
+ int cio = check_type_name.LastIndexOf ("+");
+ string container = check_type_name.Substring (0, cio);
+
+ //
+ // Check if the check_type is a nested class of the current type
+ //
+ if (check_type_name.StartsWith (type_name + "+")){
+ return true;
+ }
+
+ if (type_name.StartsWith (container)){
+ return true;
+ }
+
+ return false;
+ }
+
+ if (check_type.Assembly == TypeBuilder.Assembly){
+ return true;
+ }
+
+ return false;
+
+ }
+
+
Type LookupInterfaceOrClass (string ns, string name, out bool error)
{
DeclSpace parent;
Type t;
error = false;
+
name = MakeFQN (ns, name);
-
+
t = TypeManager.LookupType (name);
if (t != null)
return t;
t = parent.DefineType ();
if (t == null){
- Report.Error (146, "Class definition is circular: `"+name+"'");
+ Report.Error (146, Location, "Class definition is circular: `"+name+"'");
error = true;
return null;
}
return t;
}
-
+
+ public static void Error_AmbiguousTypeReference (Location loc, string name, Type t1, Type t2)
+ {
+ Report.Error (104, loc,
+ String.Format ("`{0}' is an ambiguous reference ({1} or {2}) ", name,
+ t1.FullName, t2.FullName));
+ }
+
/// <summary>
/// GetType is used to resolve type names at the DeclSpace level.
/// Use this to lookup class/struct bases, interface bases or
/// during the tree resolution process and potentially define
/// recursively the type
/// </remarks>
- public Type FindType (string name)
+ public Type FindType (Location loc, string name)
{
Type t;
bool error;
while (current_type != null) {
string pre = current_type.FullName;
-
+
t = LookupInterfaceOrClass (pre, name, out error);
if (error)
return null;
// Attempt to lookup the class on our namespace and all it's implicit parents
//
for (string ns = Namespace.Name; ns != null; ns = RootContext.ImplicitParent (ns)) {
-
t = LookupInterfaceOrClass (ns, name, out error);
if (error)
return null;
if (using_list == null)
continue;
- foreach (string n in using_list){
- t = LookupInterfaceOrClass (n, name, out error);
+ Type match = null;
+ foreach (Namespace.UsingEntry ue in using_list){
+ match = LookupInterfaceOrClass (ue.Name, name, out error);
if (error)
return null;
- if (t != null)
- return t;
+ if (match != null){
+ if (t != null){
+ Error_AmbiguousTypeReference (loc, name, t, match);
+ return null;
+ }
+
+ t = match;
+ }
}
-
+ if (t != null)
+ return t;
}
//Report.Error (246, Location, "Can not find type `"+name+"'");
return null;
}
+
+ /// <remarks>
+ /// This function is broken and not what you're looking for. It should only
+ /// be used while the type is still being created since it doesn't use the cache
+ /// and relies on the filter doing the member name check.
+ /// </remarks>
+ public abstract MemberList FindMembers (MemberTypes mt, BindingFlags bf,
+ MemberFilter filter, object criteria);
+
+ /// <remarks>
+ /// If we have a MemberCache, return it. This property may return null if the
+ /// class doesn't have a member cache or while it's still being created.
+ /// </remarks>
+ public abstract MemberCache MemberCache {
+ get;
+ }
+ }
+
+ /// <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 parent 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 parent class.
+ /// </summary>
+ IMemberContainer Parent {
+ 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;
+ protected Hashtable interface_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);
+
+ interface_hash = new Hashtable ();
+
+ // If we have a parent class (we have a parent class unless we're
+ // TypeManager.object_type), we deep-copy its MemberCache here.
+ if (Container.Parent != null)
+ member_hash = SetupCache (Container.Parent.MemberCache);
+ else if (Container.IsInterface)
+ member_hash = SetupCacheForInterface ();
+ 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) {
+ method_hash = new Hashtable ();
+ AddMethods (type);
+ }
+
+ // Add all members from the current class.
+ AddMembers (Container);
+
+ Timer.StopTimer (TimerType.CacheInit);
+ }
+
+ /// <summary>
+ /// Bootstrap this member cache by doing a deep-copy of our parent.
+ /// </summary>
+ Hashtable SetupCache (MemberCache parent)
+ {
+ Hashtable hash = new Hashtable ();
+
+ IDictionaryEnumerator it = parent.member_hash.GetEnumerator ();
+ while (it.MoveNext ()) {
+ hash [it.Key] = ((ArrayList) it.Value).Clone ();
+ }
+
+ return hash;
+ }
+
+ void AddInterfaces (MemberCache parent)
+ {
+ foreach (Type iface in parent.interface_hash.Keys) {
+ if (!interface_hash.Contains (iface))
+ interface_hash.Add (iface, true);
+ }
+ }
+
+ /// <summary>
+ /// Add the contents of `new_hash' to `hash'.
+ /// </summary>
+ void AddHashtable (Hashtable hash, Hashtable new_hash)
+ {
+ IDictionaryEnumerator it = new_hash.GetEnumerator ();
+ while (it.MoveNext ()) {
+ ArrayList list = (ArrayList) hash [it.Key];
+ if (list != null)
+ list.AddRange ((ArrayList) it.Value);
+ else
+ hash [it.Key] = ((ArrayList) it.Value).Clone ();
+ }
+ }
+
+ /// <summary>
+ /// Bootstrap the member cache for an interface type.
+ /// Type.GetMembers() won't return any inherited members for interface types,
+ /// so we need to do this manually. Interfaces also inherit from System.Object.
+ /// </summary>
+ Hashtable SetupCacheForInterface ()
+ {
+ Hashtable hash = SetupCache (TypeHandle.ObjectType.MemberCache);
+ Type [] ifaces = TypeManager.GetInterfaces (Container.Type);
+
+ foreach (Type iface in ifaces) {
+ if (interface_hash.Contains (iface))
+ continue;
+ interface_hash.Add (iface, true);
+
+ IMemberContainer iface_container =
+ TypeManager.LookupMemberContainer (iface);
+
+ MemberCache iface_cache = iface_container.MemberCache;
+ AddHashtable (hash, iface_cache.member_hash);
+ AddInterfaces (iface_cache);
+ }
+
+ return hash;
+ }
+
+ /// <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.
+ 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);
+ BindingFlags new_bf = (container == Container) ?
+ bf | BindingFlags.DeclaredOnly : 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 parent 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);
+ }
+
+ void AddMethods (BindingFlags bf, Type type)
+ {
+ MemberInfo [] members = type.GetMethods (bf);
+
+ foreach (MethodBase member in members) {
+ string name = member.Name;
+
+ // Varargs methods aren't allowed in C# code.
+ if ((member.CallingConvention & CallingConventions.VarArgs) != 0)
+ continue;
+
+ // 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);
+ }
+
+ // 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;
+ }
+
+ /// <summary>
+ /// The `MemberTypes' enumeration type is a [Flags] type which means that it may
+ /// denote multiple member types. Returns true if the given flags value denotes a
+ /// single member types.
+ /// </summary>
+ public static bool IsSingleMemberType (MemberTypes mt)
+ {
+ switch (mt) {
+ case MemberTypes.Constructor:
+ case MemberTypes.Event:
+ case MemberTypes.Field:
+ case MemberTypes.Method:
+ case MemberTypes.Property:
+ case MemberTypes.NestedType:
+ return true;
+
+ default:
+ return false;
+ }
+ }
+
+ /// <summary>
+ /// We encode the MemberTypes and BindingFlags of each members in a "magic"
+ /// number to speed up the searching process.
+ /// </summary>
+ [Flags]
+ protected enum EntryType {
+ None = 0x000,
+
+ Instance = 0x001,
+ Static = 0x002,
+ MaskStatic = Instance|Static,
+
+ Public = 0x004,
+ NonPublic = 0x008,
+ MaskProtection = Public|NonPublic,
+
+ Declared = 0x010,
+
+ Constructor = 0x020,
+ Event = 0x040,
+ Field = 0x080,
+ Method = 0x100,
+ Property = 0x200,
+ NestedType = 0x400,
+
+ MaskType = Constructor|Event|Field|Method|Property|NestedType
+ }
+
+ protected struct CacheEntry {
+ public readonly IMemberContainer Container;
+ public readonly EntryType EntryType;
+ public readonly MemberInfo Member;
+
+ public CacheEntry (IMemberContainer container, MemberInfo member,
+ MemberTypes mt, BindingFlags bf)
+ {
+ this.Container = container;
+ this.Member = member;
+ this.EntryType = GetEntryType (mt, bf);
+ }
+ }
+
+ /// <summary>
+ /// This is called each time we're walking up one level in the class hierarchy
+ /// and checks whether we can abort the search since we've already found what
+ /// we were looking for.
+ /// </summary>
+ protected bool DoneSearching (ArrayList list)
+ {
+ //
+ // We've found exactly one member in the current class and it's not
+ // a method or constructor.
+ //
+ if (list.Count == 1 && !(list [0] is MethodBase))
+ return true;
+
+ //
+ // Multiple properties: we query those just to find out the indexer
+ // name
+ //
+ if ((list.Count > 0) && (list [0] is PropertyInfo))
+ return true;
+
+ return false;
+ }
+
+ /// <summary>
+ /// Looks up members with name `name'. If you provide an optional
+ /// filter function, it'll only be called with members matching the
+ /// requested member name.
+ ///
+ /// This method will try to use the cache to do the lookup if possible.
+ ///
+ /// Unlike other FindMembers implementations, this method will always
+ /// check all inherited members - even when called on an interface type.
+ ///
+ /// If you know that you're only looking for methods, you should use
+ /// MemberTypes.Method alone since this speeds up the lookup a bit.
+ /// When doing a method-only search, it'll try to use a special method
+ /// cache (unless it's a dynamic type or an interface) and the returned
+ /// MemberInfo's will have the correct ReflectedType for inherited methods.
+ /// The lookup process will automatically restart itself in method-only
+ /// search mode if it discovers that it's about to return methods.
+ /// </summary>
+ public MemberList FindMembers (MemberTypes mt, BindingFlags bf, string name,
+ MemberFilter filter, object criteria)
+ {
+ bool declared_only = (bf & BindingFlags.DeclaredOnly) != 0;
+ bool method_search = mt == MemberTypes.Method;
+ // If we have a method cache and we aren't already doing a method-only search,
+ // then we restart a method search if the first match is a method.
+ bool do_method_search = !method_search && (method_hash != null);
+
+ ArrayList applicable;
+
+ // If this is a method-only search, we try to use the method cache if
+ // possible; a lookup in the method cache will return a MemberInfo with
+ // the correct ReflectedType for inherited methods.
+
+ if (method_search && (method_hash != null))
+ applicable = (ArrayList) method_hash [name];
+ else
+ applicable = (ArrayList) member_hash [name];
+
+ if (applicable == null)
+ return MemberList.Empty;
+
+ ArrayList list = new ArrayList ();
+
+ Timer.StartTimer (TimerType.CachedLookup);
+
+ EntryType type = GetEntryType (mt, bf);
+
+ IMemberContainer current = Container;
+
+ // `applicable' is a list of all members with the given member name `name'
+ // in the current class and all its parent classes. The list is sorted in
+ // reverse order due to the way how the cache is initialy created (to speed
+ // things up, we're doing a deep-copy of our parent).
+
+ for (int i = applicable.Count-1; i >= 0; i--) {
+ CacheEntry entry = (CacheEntry) applicable [i];
+
+ // This happens each time we're walking one level up in the class
+ // hierarchy. If we're doing a DeclaredOnly search, we must abort
+ // the first time this happens (this may already happen in the first
+ // iteration of this loop if there are no members with the name we're
+ // looking for in the current class).
+ if (entry.Container != current) {
+ if (declared_only || DoneSearching (list))
+ break;
+
+ current = entry.Container;
+ }
+
+ // Is the member of the correct type ?
+ if ((entry.EntryType & type & EntryType.MaskType) == 0)
+ continue;
+
+ // Is the member static/non-static ?
+ if ((entry.EntryType & type & EntryType.MaskStatic) == 0)
+ continue;
+
+ // Apply the filter to it.
+ if (filter (entry.Member, criteria)) {
+ if ((entry.EntryType & EntryType.MaskType) != EntryType.Method)
+ do_method_search = false;
+ list.Add (entry.Member);
+ }
+ }
+
+ Timer.StopTimer (TimerType.CachedLookup);
+
+ // If we have a method cache and we aren't already doing a method-only
+ // search, we restart in method-only search mode if the first match is
+ // a method. This ensures that we return a MemberInfo with the correct
+ // ReflectedType for inherited methods.
+ if (do_method_search && (list.Count > 0)){
+ return FindMembers (MemberTypes.Method, bf, name, filter, criteria);
+ }
+
+ return new MemberList (list);
+ }
}
}
projects / mono.git / blobdiff