//
// decl.cs: Declaration base class for structs, classes, enums and interfaces.
//
// Author: Miguel de Icaza (miguel@gnu.org)
// Marek Safar (marek.safar@seznam.cz)
//
// Licensed under the terms of the GNU GPL
//
// (C) 2001 Ximian, Inc (http://www.ximian.com)
// (C) 2004 Novell, Inc
//
// TODO: Move the method verification stuff from the class.cs and interface.cs here
//
using System;
using System.Text;
using System.Collections;
using System.Globalization;
using System.Reflection.Emit;
using System.Reflection;
#if BOOTSTRAP_WITH_OLDLIB
using XmlElement = System.Object;
#else
using System.Xml;
#endif
namespace Mono.CSharp {
public class MemberName {
public readonly string Name;
public readonly TypeArguments TypeArguments;
public readonly MemberName Left;
public readonly Location Location;
public static readonly MemberName Null = new MemberName ("");
bool is_double_colon;
private MemberName (MemberName left, string name, bool is_double_colon,
Location loc)
{
this.Name = name;
this.Location = loc;
this.is_double_colon = is_double_colon;
this.Left = left;
}
private MemberName (MemberName left, string name, bool is_double_colon,
TypeArguments args, Location loc)
: this (left, name, is_double_colon, loc)
{
if (args != null && args.Count > 0)
this.TypeArguments = args;
}
public MemberName (string name)
: this (name, Location.Null)
{ }
public MemberName (string name, Location loc)
: this (null, name, false, loc)
{ }
public MemberName (string name, TypeArguments args, Location loc)
: this (null, name, false, args, loc)
{ }
public MemberName (MemberName left, string name)
: this (left, name, left != null ? left.Location : Location.Null)
{ }
public MemberName (MemberName left, string name, Location loc)
: this (left, name, false, loc)
{ }
public MemberName (MemberName left, string name, TypeArguments args, Location loc)
: this (left, name, false, args, loc)
{ }
public MemberName (string alias, string name, Location loc)
: this (new MemberName (alias, loc), name, true, loc)
{ }
public MemberName (MemberName left, MemberName right)
: this (left, right, right.Location)
{ }
public MemberName (MemberName left, MemberName right, Location loc)
: this (null, right.Name, false, right.TypeArguments, loc)
{
if (right.is_double_colon)
throw new InternalErrorException ("Cannot append double_colon member name");
this.Left = (right.Left == null) ? left : new MemberName (left, right.Left);
}
public string GetName ()
{
return GetName (false);
}
public bool IsGeneric {
get {
if (TypeArguments != null)
return true;
else if (Left != null)
return Left.IsGeneric;
else
return false;
}
}
public string GetName (bool is_generic)
{
string name = is_generic ? Basename : Name;
string connect = is_double_colon ? "::" : ".";
if (Left != null)
return Left.GetName (is_generic) + connect + name;
else
return name;
}
public string GetTypeName ()
{
string connect = is_double_colon ? "::" : ".";
if (Left != null)
return Left.GetTypeName () + connect + MakeName (Name, TypeArguments);
else
return MakeName (Name, TypeArguments);
}
public Expression GetTypeExpression ()
{
if (Left == null) {
if (TypeArguments != null)
return new SimpleName (Basename, TypeArguments, Location);
if (RootContext.Version == LanguageVersion.LINQ && Name == "var")
return new VarExpr (Name, Location);
return new SimpleName (Name, Location);
}
if (is_double_colon) {
if (Left.Left != null)
throw new InternalErrorException ("The left side of a :: should be an identifier");
return new QualifiedAliasMember (Left.Name, Name, Location);
}
Expression lexpr = Left.GetTypeExpression ();
return new MemberAccess (lexpr, Name, TypeArguments, Location);
}
public MemberName Clone ()
{
MemberName left_clone = Left == null ? null : Left.Clone ();
return new MemberName (left_clone, Name, is_double_colon, TypeArguments, Location);
}
public string Basename {
get {
if (TypeArguments != null)
return MakeName (Name, TypeArguments);
else
return Name;
}
}
public string FullName {
get {
if (TypeArguments != null)
return Name + "<" + TypeArguments + ">";
else
return Name;
}
}
public string MethodName {
get {
string connect = is_double_colon ? "::" : ".";
if (Left != null)
return Left.FullName + connect + Name;
else
return Name;
}
}
public override string ToString ()
{
string connect = is_double_colon ? "::" : ".";
if (Left != null)
return Left.FullName + connect + FullName;
else
return FullName;
}
public override bool Equals (object other)
{
return Equals (other as MemberName);
}
public bool Equals (MemberName other)
{
if (this == other)
return true;
if (other == null || Name != other.Name)
return false;
if (is_double_colon != other.is_double_colon)
return false;
if ((TypeArguments != null) &&
(other.TypeArguments == null || TypeArguments.Count != other.TypeArguments.Count))
return false;
if ((TypeArguments == null) && (other.TypeArguments != null))
return false;
if (Left == null)
return other.Left == null;
return Left.Equals (other.Left);
}
public override int GetHashCode ()
{
int hash = Name.GetHashCode ();
for (MemberName n = Left; n != null; n = n.Left)
hash ^= n.Name.GetHashCode ();
if (is_double_colon)
hash ^= 0xbadc01d;
if (TypeArguments != null)
hash ^= TypeArguments.Count << 5;
return hash & 0x7FFFFFFF;
}
public int CountTypeArguments {
get {
if (TypeArguments != null)
return TypeArguments.Count;
else if (Left != null)
return Left.CountTypeArguments;
else
return 0;
}
}
public static string MakeName (string name, TypeArguments args)
{
if (args == null)
return name;
else
return name + "`" + args.Count;
}
public static string MakeName (string name, int count)
{
return name + "`" + count;
}
}
///
/// Base representation for members. This is used to keep track
/// of Name, Location and Modifier flags, and handling Attributes.
///
public abstract class MemberCore : Attributable, IResolveContext {
///
/// Public name
///
protected string cached_name;
public string Name {
get {
if (cached_name == null)
cached_name = MemberName.GetName (!(this is GenericMethod) && !(this is Method));
return cached_name;
}
}
// Is not readonly because of IndexerName attribute
private MemberName member_name;
public MemberName MemberName {
get { return member_name; }
}
///
/// Modifier flags that the user specified in the source code
///
private int mod_flags;
public int ModFlags {
set {
mod_flags = value;
if ((value & Modifiers.COMPILER_GENERATED) != 0)
caching_flags = Flags.IsUsed | Flags.IsAssigned;
}
get {
return mod_flags;
}
}
public /*readonly*/ DeclSpace Parent;
///
/// Location where this declaration happens
///
public Location Location {
get { return member_name.Location; }
}
///
/// XML documentation comment
///
protected string comment;
///
/// Represents header string for documentation comment
/// for each member types.
///
public abstract string DocCommentHeader { get; }
[Flags]
public enum Flags {
Obsolete_Undetected = 1, // Obsolete attribute has not been detected yet
Obsolete = 1 << 1, // Type has obsolete attribute
ClsCompliance_Undetected = 1 << 2, // CLS Compliance has not been detected yet
ClsCompliant = 1 << 3, // Type is CLS Compliant
CloseTypeCreated = 1 << 4, // Tracks whether we have Closed the type
HasCompliantAttribute_Undetected = 1 << 5, // Presence of CLSCompliantAttribute has not been detected
HasClsCompliantAttribute = 1 << 6, // Type has CLSCompliantAttribute
ClsCompliantAttributeTrue = 1 << 7, // Type has CLSCompliant (true)
Excluded_Undetected = 1 << 8, // Conditional attribute has not been detected yet
Excluded = 1 << 9, // Method is conditional
TestMethodDuplication = 1 << 10, // Test for duplication must be performed
IsUsed = 1 << 11,
IsAssigned = 1 << 12, // Field is assigned
HasExplicitLayout = 1 << 13
}
///
/// MemberCore flags at first detected then cached
///
internal Flags caching_flags;
public MemberCore (DeclSpace parent, MemberName name, Attributes attrs)
: base (attrs)
{
this.Parent = parent;
member_name = name;
caching_flags = Flags.Obsolete_Undetected | Flags.ClsCompliance_Undetected | Flags.HasCompliantAttribute_Undetected | Flags.Excluded_Undetected;
}
protected virtual void SetMemberName (MemberName new_name)
{
member_name = new_name;
cached_name = null;
}
protected bool CheckAbstractAndExtern (bool has_block)
{
if (Parent.PartialContainer.Kind == Kind.Interface)
return true;
if (has_block) {
if ((ModFlags & Modifiers.EXTERN) != 0) {
Report.Error (179, Location, "`{0}' cannot declare a body because it is marked extern",
GetSignatureForError ());
return false;
}
if ((ModFlags & Modifiers.ABSTRACT) != 0) {
Report.Error (500, Location, "`{0}' cannot declare a body because it is marked abstract",
GetSignatureForError ());
return false;
}
} else {
if ((ModFlags & (Modifiers.ABSTRACT | Modifiers.EXTERN)) == 0) {
if (RootContext.Version >= LanguageVersion.LINQ && this is Property.PropertyMethod) {
Report.Error (840, Location, "`{0}' must have a body because it is not marked abstract or extern. The property can be automatically implemented when you define both accessors",
GetSignatureForError ());
} else {
Report.Error (501, Location, "`{0}' must have a body because it is not marked abstract or extern",
GetSignatureForError ());
}
return false;
}
}
return true;
}
public abstract bool Define ();
public virtual string DocComment {
get {
return comment;
}
set {
comment = value;
}
}
//
// Returns full member name for error message
//
public virtual string GetSignatureForError ()
{
if (Parent == null || Parent.Parent == null)
return member_name.ToString ();
return String.Concat (Parent.GetSignatureForError (), '.', member_name.ToString ());
}
///
/// Base Emit method. This is also entry point for CLS-Compliant verification.
///
public virtual void Emit ()
{
if (!RootContext.VerifyClsCompliance)
return;
VerifyClsCompliance ();
}
public virtual bool IsUsed {
get { return (caching_flags & Flags.IsUsed) != 0; }
}
public void SetMemberIsUsed ()
{
caching_flags |= Flags.IsUsed;
}
///
/// Returns instance of ObsoleteAttribute for this MemberCore
///
public virtual ObsoleteAttribute GetObsoleteAttribute ()
{
// ((flags & (Flags.Obsolete_Undetected | Flags.Obsolete)) == 0) is slower, but why ?
if ((caching_flags & Flags.Obsolete_Undetected) == 0 && (caching_flags & Flags.Obsolete) == 0) {
return null;
}
caching_flags &= ~Flags.Obsolete_Undetected;
if (OptAttributes == null)
return null;
Attribute obsolete_attr = OptAttributes.Search (
TypeManager.obsolete_attribute_type);
if (obsolete_attr == null)
return null;
ObsoleteAttribute obsolete = obsolete_attr.GetObsoleteAttribute ();
if (obsolete == null)
return null;
caching_flags |= Flags.Obsolete;
return obsolete;
}
///
/// Checks for ObsoleteAttribute presence. It's used for testing of all non-types elements
///
public virtual void CheckObsoleteness (Location loc)
{
if (Parent != null)
Parent.CheckObsoleteness (loc);
ObsoleteAttribute oa = GetObsoleteAttribute ();
if (oa == null) {
return;
}
AttributeTester.Report_ObsoleteMessage (oa, GetSignatureForError (), loc);
}
///
/// Analyze whether CLS-Compliant verification must be execute for this MemberCore.
///
public override bool IsClsComplianceRequired ()
{
if ((caching_flags & Flags.ClsCompliance_Undetected) == 0)
return (caching_flags & Flags.ClsCompliant) != 0;
if (GetClsCompliantAttributeValue () && IsExposedFromAssembly ()) {
caching_flags &= ~Flags.ClsCompliance_Undetected;
caching_flags |= Flags.ClsCompliant;
return true;
}
caching_flags &= ~Flags.ClsCompliance_Undetected;
return false;
}
///
/// Returns true when MemberCore is exposed from assembly.
///
public bool IsExposedFromAssembly ()
{
if ((ModFlags & (Modifiers.PUBLIC | Modifiers.PROTECTED)) == 0)
return false;
DeclSpace parentContainer = Parent;
while (parentContainer != null && parentContainer.ModFlags != 0) {
if ((parentContainer.ModFlags & (Modifiers.PUBLIC | Modifiers.PROTECTED)) == 0)
return false;
parentContainer = parentContainer.Parent;
}
return true;
}
///
/// Goes through class hierarchy and gets value of first found CLSCompliantAttribute.
/// If no is attribute exists then assembly CLSCompliantAttribute is returned.
///
public virtual bool GetClsCompliantAttributeValue ()
{
if ((caching_flags & Flags.HasCompliantAttribute_Undetected) == 0)
return (caching_flags & Flags.ClsCompliantAttributeTrue) != 0;
caching_flags &= ~Flags.HasCompliantAttribute_Undetected;
if (OptAttributes != null) {
Attribute cls_attribute = OptAttributes.Search (
TypeManager.cls_compliant_attribute_type);
if (cls_attribute != null) {
caching_flags |= Flags.HasClsCompliantAttribute;
bool value = cls_attribute.GetClsCompliantAttributeValue ();
if (value)
caching_flags |= Flags.ClsCompliantAttributeTrue;
return value;
}
}
// It's null for TypeParameter
if (Parent == null)
return false;
if (Parent.GetClsCompliantAttributeValue ()) {
caching_flags |= Flags.ClsCompliantAttributeTrue;
return true;
}
return false;
}
///
/// Returns true if MemberCore is explicitly marked with CLSCompliantAttribute
///
protected bool HasClsCompliantAttribute {
get {
if ((caching_flags & Flags.HasCompliantAttribute_Undetected) != 0)
GetClsCompliantAttributeValue ();
return (caching_flags & Flags.HasClsCompliantAttribute) != 0;
}
}
///
/// Returns true when a member supports multiple overloads (methods, indexers, etc)
///
public virtual bool IsOverloadable {
get {
return false;
}
}
public void EnableOverloadChecks ()
{
caching_flags |= Flags.TestMethodDuplication;
}
///
/// The main virtual method for CLS-Compliant verifications.
/// The method returns true if member is CLS-Compliant and false if member is not
/// CLS-Compliant which means that CLS-Compliant tests are not necessary. A descendants override it
/// and add their extra verifications.
///
protected virtual bool VerifyClsCompliance ()
{
if (!IsClsComplianceRequired ()) {
if (HasClsCompliantAttribute && Report.WarningLevel >= 2) {
if (!IsExposedFromAssembly ())
Report.Warning (3019, 2, Location, "CLS compliance checking will not be performed on `{0}' because it is not visible from outside this assembly", GetSignatureForError ());
if (!CodeGen.Assembly.IsClsCompliant)
Report.Warning (3021, 2, Location, "`{0}' does not need a CLSCompliant attribute because the assembly is not marked as CLS-compliant", GetSignatureForError ());
}
return false;
}
if (HasClsCompliantAttribute) {
if (CodeGen.Assembly.ClsCompliantAttribute == null && !CodeGen.Assembly.IsClsCompliant) {
Report.Error (3014, Location,
"`{0}' cannot be marked as CLS-compliant because the assembly is not marked as CLS-compliant",
GetSignatureForError ());
return false;
}
if (!Parent.IsClsComplianceRequired ()) {
Report.Warning (3018, 1, Location, "`{0}' cannot be marked as CLS-compliant because it is a member of non CLS-compliant type `{1}'",
GetSignatureForError (), Parent.GetSignatureForError ());
return false;
}
}
if (member_name.Name [0] == '_') {
Report.Error (3008, Location, "Identifier `{0}' is not CLS-compliant", GetSignatureForError () );
}
return true;
}
//
// Raised (and passed an XmlElement that contains the comment)
// when GenerateDocComment is writing documentation expectedly.
//
internal virtual void OnGenerateDocComment (XmlElement intermediateNode)
{
}
//
// Returns a string that represents the signature for this
// member which should be used in XML documentation.
//
public virtual string GetDocCommentName (DeclSpace ds)
{
if (ds == null || this is DeclSpace)
return DocCommentHeader + Name;
else
return String.Concat (DocCommentHeader, ds.Name, ".", Name);
}
//
// Generates xml doc comments (if any), and if required,
// handle warning report.
//
internal virtual void GenerateDocComment (DeclSpace ds)
{
DocUtil.GenerateDocComment (this, ds);
}
public override IResolveContext ResolveContext {
get { return this; }
}
#region IResolveContext Members
public DeclSpace DeclContainer {
get { return Parent; }
}
public virtual DeclSpace GenericDeclContainer {
get { return DeclContainer; }
}
public bool IsInObsoleteScope {
get {
if (GetObsoleteAttribute () != null)
return true;
return Parent == null ? false : Parent.IsInObsoleteScope;
}
}
public bool IsInUnsafeScope {
get {
if ((ModFlags & Modifiers.UNSAFE) != 0)
return true;
return Parent == null ? false : Parent.IsInUnsafeScope;
}
}
#endregion
}
///
/// Base class for structs, classes, enumerations and interfaces.
///
///
/// They all create new declaration spaces. This
/// provides the common foundation for managing those name
/// spaces.
///
public abstract class DeclSpace : MemberCore {
///
/// This points to the actual definition that is being
/// created with System.Reflection.Emit
///
public TypeBuilder TypeBuilder;
///
/// If we are a generic type, this is the type we are
/// currently defining. We need to lookup members on this
/// instead of the TypeBuilder.
///
public Type CurrentType;
//
// This is the namespace in which this typecontainer
// was declared. We use this to resolve names.
//
public NamespaceEntry NamespaceEntry;
private Hashtable Cache = new Hashtable ();
public readonly string Basename;
protected Hashtable defined_names;
public TypeContainer PartialContainer;
readonly bool is_generic;
readonly int count_type_params;
readonly int count_current_type_params;
//
// Whether we are Generic
//
public bool IsGeneric {
get {
if (is_generic)
return true;
else if (Parent != null)
return Parent.IsGeneric;
else
return false;
}
}
static string[] attribute_targets = new string [] { "type" };
public DeclSpace (NamespaceEntry ns, DeclSpace parent, MemberName name,
Attributes attrs)
: base (parent, name, attrs)
{
NamespaceEntry = ns;
Basename = name.Basename;
defined_names = new Hashtable ();
PartialContainer = null;
if (name.TypeArguments != null) {
is_generic = true;
count_type_params = count_current_type_params = name.TypeArguments.Count;
}
if (parent != null)
count_type_params += parent.count_type_params;
}
public override DeclSpace GenericDeclContainer {
get { return this; }
}
///
/// Adds the member to defined_names table. It tests for duplications and enclosing name conflicts
///
protected virtual bool AddToContainer (MemberCore symbol, string name)
{
MemberCore mc = (MemberCore) defined_names [name];
if (mc == null) {
defined_names.Add (name, symbol);
return true;
}
if (symbol.IsOverloadable && mc.IsOverloadable) {
//
// Enable both symbols check for indexers, because we don't know which one came first
//
if (symbol is Indexer.SetIndexerMethod || symbol is Indexer.GetIndexerMethod)
mc.EnableOverloadChecks ();
symbol.EnableOverloadChecks ();
return true;
}
Report.SymbolRelatedToPreviousError (mc);
if ((mc.ModFlags & Modifiers.PARTIAL) != 0 && (symbol is ClassOrStruct || symbol is Interface)) {
Error_MissingPartialModifier (symbol);
return false;
}
if (this is RootTypes) {
Report.Error (101, symbol.Location,
"The namespace `{0}' already contains a definition for `{1}'",
((DeclSpace)symbol).NamespaceEntry.GetSignatureForError (), symbol.MemberName.Name);
} else if (symbol is TypeParameter) {
Report.Error (692, symbol.Location,
"Duplicate type parameter `{0}'", name);
} else {
Report.Error (102, symbol.Location,
"The type `{0}' already contains a definition for `{1}'",
GetSignatureForError (), symbol.MemberName.Name);
}
return false;
}
///
/// Returns the MemberCore associated with a given name in the declaration
/// space. It doesn't return method based symbols !!
///
///
public MemberCore GetDefinition (string name)
{
return (MemberCore)defined_names [name];
}
public bool IsStaticClass {
get { return (ModFlags & Modifiers.STATIC) != 0; }
}
//
// root_types contains all the types. All TopLevel types
// hence have a parent that points to `root_types', that is
// why there is a non-obvious test down here.
//
public bool IsTopLevel {
get { return (Parent != null && Parent.Parent == null); }
}
public virtual void CloseType ()
{
if ((caching_flags & Flags.CloseTypeCreated) == 0){
try {
TypeBuilder.CreateType ();
} catch {
//
// The try/catch is needed because
// nested enumerations fail to load when they
// are defined.
//
// Even if this is the right order (enumerations
// declared after types).
//
// Note that this still creates the type and
// it is possible to save it
}
caching_flags |= Flags.CloseTypeCreated;
}
}
protected virtual TypeAttributes TypeAttr {
get { return CodeGen.Module.DefaultCharSetType; }
}
///
/// Should be overriten by the appropriate declaration space
///
public abstract TypeBuilder DefineType ();
///
/// 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.
///
public virtual bool DefineMembers ()
{
if (((ModFlags & Modifiers.NEW) != 0) && IsTopLevel) {
Report.Error (1530, Location, "Keyword `new' is not allowed on namespace elements");
return false;
}
return true;
}
protected void Error_MissingPartialModifier (MemberCore type)
{
Report.Error (260, type.Location,
"Missing partial modifier on declaration of type `{0}'. Another partial declaration of this type exists",
type.GetSignatureForError ());
}
public override string GetSignatureForError ()
{
if (IsGeneric) {
return SimpleName.RemoveGenericArity (Name) + TypeParameter.GetSignatureForError (CurrentTypeParameters);
}
// Parent.GetSignatureForError
return Name;
}
public bool CheckAccessLevel (Type check_type)
{
TypeBuilder tb;
if (this is GenericMethod)
tb = Parent.TypeBuilder;
else
tb = TypeBuilder;
check_type = TypeManager.DropGenericTypeArguments (check_type);
if (check_type == tb)
return true;
if (TypeBuilder == null)
// FIXME: TypeBuilder will be null when invoked by Class.GetNormalBases().
// However, this is invoked again later -- so safe to return true.
// May also be null when resolving top-level attributes.
return true;
//
// 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 (TypeManager.GetElementType (check_type));
if (TypeManager.IsGenericParameter(check_type))
return true; // FIXME
TypeAttributes check_attr = check_type.Attributes & TypeAttributes.VisibilityMask;
switch (check_attr){
case TypeAttributes.Public:
return true;
case TypeAttributes.NotPublic:
if (TypeBuilder == null)
// FIXME: TypeBuilder will be null when invoked by Class.GetNormalBases().
// However, this is invoked again later -- so safe to return true.
// May also be null when resolving top-level attributes.
return true;
//
// This test should probably use the declaringtype.
//
return check_type.Assembly == TypeBuilder.Assembly ||
TypeManager.IsFriendAssembly (check_type.Assembly);
case TypeAttributes.NestedPublic:
return true;
case TypeAttributes.NestedPrivate:
return NestedAccessible (tb, check_type);
case TypeAttributes.NestedFamily:
//
// Only accessible to methods in current type or any subtypes
//
return FamilyAccessible (tb, check_type);
case TypeAttributes.NestedFamANDAssem:
return ((check_type.Assembly == tb.Assembly) ||
TypeManager.IsFriendAssembly (check_type.Assembly)) &&
FamilyAccessible (tb, check_type);
case TypeAttributes.NestedFamORAssem:
return (check_type.Assembly == tb.Assembly) ||
FamilyAccessible (tb, check_type) ||
TypeManager.IsFriendAssembly (check_type.Assembly);
case TypeAttributes.NestedAssembly:
return check_type.Assembly == tb.Assembly ||
TypeManager.IsFriendAssembly (check_type.Assembly);
}
Console.WriteLine ("HERE: " + check_attr);
return false;
}
protected bool NestedAccessible (Type tb, Type check_type)
{
Type declaring = check_type.DeclaringType;
return TypeBuilder == declaring ||
TypeManager.IsNestedChildOf (TypeBuilder, declaring);
}
protected bool FamilyAccessible (Type tb, Type check_type)
{
Type declaring = check_type.DeclaringType;
return TypeManager.IsNestedFamilyAccessible (TypeBuilder, declaring);
}
// Access level of a type.
const int X = 1;
enum AccessLevel { // Each column represents `is this scope larger or equal to Blah scope'
// Public Assembly Protected
Protected = (0 << 0) | (0 << 1) | (X << 2),
Public = (X << 0) | (X << 1) | (X << 2),
Private = (0 << 0) | (0 << 1) | (0 << 2),
Internal = (0 << 0) | (X << 1) | (0 << 2),
ProtectedOrInternal = (0 << 0) | (X << 1) | (X << 2),
}
static AccessLevel GetAccessLevelFromModifiers (int flags)
{
if ((flags & Modifiers.INTERNAL) != 0) {
if ((flags & Modifiers.PROTECTED) != 0)
return AccessLevel.ProtectedOrInternal;
else
return AccessLevel.Internal;
} else if ((flags & Modifiers.PROTECTED) != 0)
return AccessLevel.Protected;
else if ((flags & Modifiers.PRIVATE) != 0)
return AccessLevel.Private;
else
return AccessLevel.Public;
}
// What is the effective access level of this?
// TODO: Cache this?
AccessLevel EffectiveAccessLevel {
get {
AccessLevel myAccess = GetAccessLevelFromModifiers (ModFlags);
if (!IsTopLevel && (Parent != null))
return myAccess & Parent.EffectiveAccessLevel;
return myAccess;
}
}
// Return the access level for type `t'
static AccessLevel TypeEffectiveAccessLevel (Type t)
{
if (t.IsPublic)
return AccessLevel.Public;
if (t.IsNestedPrivate)
return AccessLevel.Private;
if (t.IsNotPublic)
return AccessLevel.Internal;
// By now, it must be nested
AccessLevel parent_level = TypeEffectiveAccessLevel (t.DeclaringType);
if (t.IsNestedPublic)
return parent_level;
if (t.IsNestedAssembly)
return parent_level & AccessLevel.Internal;
if (t.IsNestedFamily)
return parent_level & AccessLevel.Protected;
if (t.IsNestedFamORAssem)
return parent_level & AccessLevel.ProtectedOrInternal;
if (t.IsNestedFamANDAssem)
throw new NotImplementedException ("NestedFamANDAssem not implemented, cant make this kind of type from c# anyways");
// nested private is taken care of
throw new Exception ("I give up, what are you?");
}
//
// This answers `is the type P, as accessible as a member M which has the
// accessability @flags which is declared as a nested member of the type T, this declspace'
//
public bool AsAccessible (Type p, int flags)
{
//
// 1) if M is private, its accessability is the same as this declspace.
// we already know that P is accessible to T before this method, so we
// may return true.
//
if ((flags & Modifiers.PRIVATE) != 0)
return true;
while (p.IsArray || p.IsPointer || p.IsByRef)
p = TypeManager.GetElementType (p);
#if GMCS_SOURCE
if (p.IsGenericParameter)
return true;
if (TypeManager.IsGenericType (p)) {
foreach (Type t in p.GetGenericArguments ()) {
if (!AsAccessible (t, flags))
return false;
}
}
#endif
AccessLevel pAccess = TypeEffectiveAccessLevel (p);
AccessLevel mAccess = this.EffectiveAccessLevel &
GetAccessLevelFromModifiers (flags);
// for every place from which we can access M, we must
// be able to access P as well. So, we want
// For every bit in M and P, M_i -> P_1 == true
// or, ~ (M -> P) == 0 <-> ~ ( ~M | P) == 0
return ~ (~ mAccess | pAccess) == 0;
}
private Type LookupNestedTypeInHierarchy (string name)
{
// if the member cache has been created, lets use it.
// the member cache is MUCH faster.
if (MemberCache != null)
return MemberCache.FindNestedType (name);
// no member cache. Do it the hard way -- reflection
Type t = null;
for (Type current_type = TypeBuilder;
current_type != null && current_type != TypeManager.object_type;
current_type = current_type.BaseType) {
Type ct = TypeManager.DropGenericTypeArguments (current_type);
if (ct is TypeBuilder) {
TypeContainer tc = ct == TypeBuilder
? PartialContainer : TypeManager.LookupTypeContainer (ct);
if (tc != null)
t = tc.FindNestedType (name);
} else {
t = TypeManager.GetNestedType (ct, name);
}
if ((t == null) || !CheckAccessLevel (t))
continue;
#if GMCS_SOURCE
if (!TypeManager.IsGenericType (current_type))
return t;
Type[] args = TypeManager.GetTypeArguments (current_type);
Type[] targs = TypeManager.GetTypeArguments (t);
for (int i = 0; i < args.Length; i++)
targs [i] = args [i];
t = t.MakeGenericType (targs);
#endif
return t;
}
return null;
}
public virtual ExtensionMethodGroupExpr LookupExtensionMethod (Type extensionType, string name)
{
return null;
}
//
// Public function used to locate types.
//
// Set 'ignore_cs0104' to true if you want to ignore cs0104 errors.
//
// Returns: Type or null if they type can not be found.
//
public FullNamedExpression LookupNamespaceOrType (string name, Location loc, bool ignore_cs0104)
{
if (Cache.Contains (name))
return (FullNamedExpression) Cache [name];
FullNamedExpression e;
Type t = LookupNestedTypeInHierarchy (name);
if (t != null)
e = new TypeExpression (t, Location.Null);
else if (Parent != null)
e = Parent.LookupNamespaceOrType (name, loc, ignore_cs0104);
else
e = NamespaceEntry.LookupNamespaceOrType (this, name, loc, ignore_cs0104);
Cache [name] = e;
return e;
}
///
/// 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.
///
public abstract MemberList FindMembers (MemberTypes mt, BindingFlags bf,
MemberFilter filter, object criteria);
///
/// 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.
///
public abstract MemberCache MemberCache {
get;
}
public override void ApplyAttributeBuilder (Attribute a, CustomAttributeBuilder cb)
{
if (a.Type == TypeManager.required_attr_type) {
Report.Error (1608, a.Location, "The RequiredAttribute attribute is not permitted on C# types");
return;
}
TypeBuilder.SetCustomAttribute (cb);
}
//
// Extensions for generics
//
TypeParameter[] type_params;
TypeParameter[] type_param_list;
protected string GetInstantiationName ()
{
StringBuilder sb = new StringBuilder (Name);
sb.Append ("<");
for (int i = 0; i < type_param_list.Length; i++) {
if (i > 0)
sb.Append (",");
sb.Append (type_param_list [i].Name);
}
sb.Append (">");
return sb.ToString ();
}
bool check_type_parameter (ArrayList list, int start, string name)
{
for (int i = 0; i < start; i++) {
TypeParameter param = (TypeParameter) list [i];
if (param.Name != name)
continue;
Report.SymbolRelatedToPreviousError (Parent);
// TODO: Location is wrong (parent instead of child)
Report.Warning (693, 3, Location,
"Type parameter `{0}' has the same name as the type parameter from outer type `{1}'",
name, Parent.GetSignatureForError ());
return false;
}
return true;
}
TypeParameter[] initialize_type_params ()
{
if (type_param_list != null)
return type_param_list;
DeclSpace the_parent = Parent;
if (this is GenericMethod)
the_parent = null;
int start = 0;
ArrayList list = new ArrayList ();
if (the_parent != null && the_parent.IsGeneric) {
// FIXME: move generics info out of DeclSpace
TypeParameter[] parent_params = the_parent.PartialContainer.TypeParameters;
start = parent_params.Length;
list.AddRange (parent_params);
}
int count = type_params != null ? type_params.Length : 0;
for (int i = 0; i < count; i++) {
TypeParameter param = type_params [i];
check_type_parameter (list, start, param.Name);
list.Add (param);
}
type_param_list = new TypeParameter [list.Count];
list.CopyTo (type_param_list, 0);
return type_param_list;
}
public virtual void SetParameterInfo (ArrayList constraints_list)
{
if (!is_generic) {
if (constraints_list != null) {
Report.Error (
80, Location, "Constraints are not allowed " +
"on non-generic declarations");
}
return;
}
TypeParameterName[] names = MemberName.TypeArguments.GetDeclarations ();
type_params = new TypeParameter [names.Length];
//
// Register all the names
//
for (int i = 0; i < type_params.Length; i++) {
TypeParameterName name = names [i];
Constraints constraints = null;
if (constraints_list != null) {
int total = constraints_list.Count;
for (int ii = 0; ii < total; ++ii) {
Constraints constraints_at = (Constraints)constraints_list[ii];
// TODO: it is used by iterators only
if (constraints_at == null) {
constraints_list.RemoveAt (ii);
--total;
continue;
}
if (constraints_at.TypeParameter == name.Name) {
constraints = constraints_at;
constraints_list.RemoveAt(ii);
break;
}
}
}
type_params [i] = new TypeParameter (
Parent, this, name.Name, constraints, name.OptAttributes,
Location);
AddToContainer (type_params [i], name.Name);
}
if (constraints_list != null && constraints_list.Count > 0) {
foreach (Constraints constraint in constraints_list) {
Report.Error(699, constraint.Location, "`{0}': A constraint references nonexistent type parameter `{1}'",
GetSignatureForError (), constraint.TypeParameter);
}
}
}
public TypeParameter[] TypeParameters {
get {
if (!IsGeneric)
throw new InvalidOperationException ();
if ((PartialContainer != null) && (PartialContainer != this))
return PartialContainer.TypeParameters;
if (type_param_list == null)
initialize_type_params ();
return type_param_list;
}
}
public TypeParameter[] CurrentTypeParameters {
get {
if (!IsGeneric)
throw new InvalidOperationException ();
if ((PartialContainer != null) && (PartialContainer != this))
return PartialContainer.CurrentTypeParameters;
if (type_params != null)
return type_params;
else
return new TypeParameter [0];
}
}
public int CountTypeParameters {
get {
return count_type_params;
}
}
public int CountCurrentTypeParameters {
get {
return count_current_type_params;
}
}
public TypeParameterExpr LookupGeneric (string name, Location loc)
{
if (!IsGeneric)
return null;
TypeParameter [] current_params;
if (this is TypeContainer)
current_params = PartialContainer.CurrentTypeParameters;
else
current_params = CurrentTypeParameters;
foreach (TypeParameter type_param in current_params) {
if (type_param.Name == name)
return new TypeParameterExpr (type_param, loc);
}
if (Parent != null)
return Parent.LookupGeneric (name, loc);
return null;
}
// Used for error reporting only
public virtual Type LookupAnyGeneric (string typeName)
{
return NamespaceEntry.NS.LookForAnyGenericType (typeName);
}
public override string[] ValidAttributeTargets {
get { return attribute_targets; }
}
protected override bool VerifyClsCompliance ()
{
if (!base.VerifyClsCompliance ()) {
return false;
}
if (type_params != null) {
foreach (TypeParameter tp in type_params) {
if (tp.Constraints == null)
continue;
tp.Constraints.VerifyClsCompliance ();
}
}
IDictionary cache = TypeManager.AllClsTopLevelTypes;
if (cache == null)
return true;
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 {
Report.SymbolRelatedToPreviousError ((DeclSpace)val);
}
#if GMCS_SOURCE
Report.Warning (3005, 1, Location, "Identifier `{0}' differing only in case is not CLS-compliant", GetSignatureForError ());
#else
Report.Error (3005, Location, "Identifier `{0}' differing only in case is not CLS-compliant", GetSignatureForError ());
#endif
return true;
}
}
///
/// This is a readonly list of MemberInfo's.
///
public class MemberList : IList {
public readonly IList List;
int count;
///
/// Create a new MemberList from the given IList.
///
public MemberList (IList list)
{
if (list != null)
this.List = list;
else
this.List = new ArrayList ();
count = List.Count;
}
///
/// Concatenate the ILists `first' and `second' to a new MemberList.
///
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 ());
///
/// Cast the MemberList into a MemberInfo[] array.
///
///
/// This is an expensive operation, only use it if it's really necessary.
///
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 ();
}
}
///
/// 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.
///
public interface IMemberContainer {
///
/// The name of the IMemberContainer. This is only used for
/// debugging purposes.
///
string Name {
get;
}
///
/// The type of this IMemberContainer.
///
Type Type {
get;
}
///
/// 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.
///
MemberCache BaseCache {
get;
}
///
/// Whether this is an interface.
///
bool IsInterface {
get;
}
///
/// Returns all members of this class with the corresponding MemberTypes
/// and BindingFlags.
///
///
/// 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.
///
MemberList GetMembers (MemberTypes mt, BindingFlags bf);
///
/// Return the container's member cache.
///
MemberCache MemberCache {
get;
}
}
///
/// 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.
///
public class MemberCache {
public readonly IMemberContainer Container;
protected Hashtable member_hash;
protected Hashtable method_hash;
///
/// Create a new MemberCache for the given IMemberContainer `container'.
///
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 &&
// !(type.IsGenericType && (type.GetGenericTypeDefinition () is TypeBuilder)) &&
!TypeManager.IsGenericType (type) && !TypeManager.IsGenericParameter (type) &&
(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));
}
public MemberCache (IMemberContainer container, Type base_class, Type[] ifaces)
{
this.Container = container;
// 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 (base_class != null)
AddCacheContents (TypeManager.LookupMemberCache (base_class));
if (ifaces != null) {
foreach (Type itype in ifaces) {
MemberCache cache = TypeManager.LookupMemberCache (itype);
if (cache != null)
AddCacheContents (cache);
}
}
}
///
/// Bootstrap this member cache by doing a deep-copy of our base.
///
static 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;
}
///
/// Add the contents of `cache' to the member_hash.
///
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);
}
}
}
///
/// Add all members from class `container' to the cache.
///
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);
}
void AddMember (MemberTypes mt, BindingFlags bf, IMemberContainer container,
string name, MemberInfo member)
{
// 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));
}
///
/// 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.
///
void AddMembers (MemberTypes mt, BindingFlags bf, IMemberContainer container)
{
MemberList members = container.GetMembers (mt, bf);
foreach (MemberInfo member in members) {
string name = member.Name;
AddMember (mt, bf, container, name, member);
if (member is MethodInfo) {
string gname = TypeManager.GetMethodName ((MethodInfo) member);
if (gname != name)
AddMember (mt, bf, container, gname, member);
}
}
}
///
/// Add all declared and inherited methods from class `type' to the method cache.
///
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));
}
}
///
/// Compute and return a appropriate `EntryType' magic number for the given
/// MemberTypes and BindingFlags.
///
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;
}
///
/// 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.
///
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;
}
}
///
/// We encode the MemberTypes and BindingFlags of each members in a "magic"
/// number to speed up the searching process.
///
[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,
NotExtensionMethod = 0x800,
MaskType = Constructor|Event|Field|Method|Property|NestedType
}
protected class CacheEntry {
public readonly IMemberContainer Container;
public 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);
}
public override string ToString ()
{
return String.Format ("CacheEntry ({0}:{1}:{2})", Container.Name,
EntryType, Member);
}
}
///
/// 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.
///
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;
}
///
/// 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.
///
ArrayList global = new ArrayList ();
bool using_global = false;
static MemberInfo [] emptyMemberInfo = new MemberInfo [0];
public MemberInfo [] FindMembers (MemberTypes mt, BindingFlags bf, string name,
MemberFilter filter, object criteria)
{
if (using_global)
throw new Exception ();
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 emptyMemberInfo;
//
// 32 slots gives 53 rss/54 size
// 2/4 slots gives 55 rss
//
// Strange: from 25,000 calls, only 1,800
// are above 2. Why does this impact it?
//
global.Clear ();
using_global = true;
Timer.StartTimer (TimerType.CachedLookup);
EntryType type = GetEntryType (mt, bf);
IMemberContainer current = Container;
bool do_interface_search = current.IsInterface;
// `applicable' is a list of all members with the given member name `name'
// in the current class and all its base 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 base).
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)
break;
if (!do_interface_search && DoneSearching (global))
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;
}
// Because interfaces support multiple inheritance we have to be sure that
// base member is from same interface, so only top level member will be returned
if (do_interface_search && global.Count > 0) {
bool member_already_exists = false;
foreach (MemberInfo mi in global) {
if (mi is MethodBase)
continue;
if (IsInterfaceBaseInterface (TypeManager.GetInterfaces (mi.DeclaringType), entry.Member.DeclaringType)) {
member_already_exists = true;
break;
}
}
if (member_already_exists)
continue;
}
global.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 && (global.Count > 0)){
using_global = false;
return FindMembers (MemberTypes.Method, bf, name, filter, criteria);
}
using_global = false;
MemberInfo [] copy = new MemberInfo [global.Count];
global.CopyTo (copy);
return copy;
}
///
/// Returns true if iterface exists in any base interfaces (ifaces)
///
static bool IsInterfaceBaseInterface (Type[] ifaces, Type ifaceToFind)
{
foreach (Type iface in ifaces) {
if (iface == ifaceToFind)
return true;
Type[] base_ifaces = TypeManager.GetInterfaces (iface);
if (base_ifaces.Length > 0 && IsInterfaceBaseInterface (base_ifaces, ifaceToFind))
return true;
}
return false;
}
// find the nested type @name in @this.
public Type FindNestedType (string name)
{
ArrayList applicable = (ArrayList) member_hash [name];
if (applicable == null)
return null;
for (int i = applicable.Count-1; i >= 0; i--) {
CacheEntry entry = (CacheEntry) applicable [i];
if ((entry.EntryType & EntryType.NestedType & EntryType.MaskType) != 0)
return (Type) entry.Member;
}
return null;
}
public MemberInfo FindBaseEvent (Type invocation_type, string name)
{
ArrayList applicable = (ArrayList) member_hash [name];
if (applicable == null)
return null;
//
// Walk the chain of events, starting from the top.
//
for (int i = applicable.Count - 1; i >= 0; i--)
{
CacheEntry entry = (CacheEntry) applicable [i];
if ((entry.EntryType & EntryType.Event) == 0)
continue;
EventInfo ei = (EventInfo)entry.Member;
return ei.GetAddMethod (true);
}
return null;
}
//
// Looks for extension methods with defined name and extension type
//
public ArrayList FindExtensionMethods (Type extensionType, string name, bool publicOnly)
{
ArrayList entries;
if (method_hash != null)
entries = (ArrayList)method_hash [name];
else
entries = (ArrayList)member_hash [name];
if (entries == null)
return null;
EntryType entry_type = EntryType.Static | EntryType.Method | EntryType.NotExtensionMethod;
if (publicOnly) {
entry_type |= EntryType.Public;
}
EntryType found_entry_type = entry_type & ~EntryType.NotExtensionMethod;
ArrayList candidates = null;
foreach (CacheEntry entry in entries) {
if ((entry.EntryType & entry_type) == found_entry_type) {
MethodBase mb = (MethodBase)entry.Member;
IMethodData md = TypeManager.GetMethod (mb);
ParameterData pd = md == null ?
TypeManager.GetParameterData (mb) : md.ParameterInfo;
Type ex_type = pd.ExtensionMethodType;
if (ex_type == null) {
entry.EntryType |= EntryType.NotExtensionMethod;
continue;
}
//if (implicit conversion between ex_type and extensionType exist) {
if (candidates == null)
candidates = new ArrayList (2);
candidates.Add (mb);
//}
}
}
return candidates;
}
//
// This finds the method or property for us to override. invocation_type is the type where
// the override is going to be declared, name is the name of the method/property, and
// param_types is the parameters, if any to the method or property
//
// Because the MemberCache holds members from this class and all the base classes,
// we can avoid tons of reflection stuff.
//
public MemberInfo FindMemberToOverride (Type invocation_type, string name, Type [] param_types, GenericMethod generic_method, bool is_property)
{
ArrayList applicable;
if (method_hash != null && !is_property)
applicable = (ArrayList) method_hash [name];
else
applicable = (ArrayList) member_hash [name];
if (applicable == null)
return null;
//
// Walk the chain of methods, starting from the top.
//
for (int i = applicable.Count - 1; i >= 0; i--) {
CacheEntry entry = (CacheEntry) applicable [i];
if ((entry.EntryType & (is_property ? (EntryType.Property | EntryType.Field) : EntryType.Method)) == 0)
continue;
PropertyInfo pi = null;
MethodInfo mi = null;
FieldInfo fi = null;
Type [] cmp_attrs = null;
if (is_property) {
if ((entry.EntryType & EntryType.Field) != 0) {
fi = (FieldInfo)entry.Member;
// TODO: For this case we ignore member type
//fb = TypeManager.GetField (fi);
//cmp_attrs = new Type[] { fb.MemberType };
} else {
pi = (PropertyInfo) entry.Member;
cmp_attrs = TypeManager.GetArgumentTypes (pi);
}
} else {
mi = (MethodInfo) entry.Member;
cmp_attrs = TypeManager.GetParameterData (mi).Types;
}
if (fi != null) {
// TODO: Almost duplicate !
// Check visibility
switch (fi.Attributes & FieldAttributes.FieldAccessMask) {
case FieldAttributes.PrivateScope:
continue;
case FieldAttributes.Private:
//
// A private method is Ok if we are a nested subtype.
// The spec actually is not very clear about this, see bug 52458.
//
if (!invocation_type.Equals (entry.Container.Type) &&
!TypeManager.IsNestedChildOf (invocation_type, entry.Container.Type))
continue;
break;
case FieldAttributes.FamANDAssem:
case FieldAttributes.Assembly:
//
// Check for assembly methods
//
if (mi.DeclaringType.Assembly != CodeGen.Assembly.Builder)
continue;
break;
}
return entry.Member;
}
//
// Check the arguments
//
if (cmp_attrs.Length != param_types.Length)
continue;
int j;
for (j = 0; j < cmp_attrs.Length; ++j)
if (!TypeManager.IsEqual (param_types [j], cmp_attrs [j]))
break;
if (j < cmp_attrs.Length)
continue;
//
// check generic arguments for methods
//
if (mi != null) {
Type [] cmpGenArgs = TypeManager.GetGenericArguments (mi);
if (generic_method == null && cmpGenArgs.Length != 0)
continue;
if (generic_method != null && cmpGenArgs.Length != generic_method.TypeParameters.Length)
continue;
}
//
// get one of the methods because this has the visibility info.
//
if (is_property) {
mi = pi.GetGetMethod (true);
if (mi == null)
mi = pi.GetSetMethod (true);
}
//
// Check visibility
//
switch (mi.Attributes & MethodAttributes.MemberAccessMask) {
case MethodAttributes.PrivateScope:
continue;
case MethodAttributes.Private:
//
// A private method is Ok if we are a nested subtype.
// The spec actually is not very clear about this, see bug 52458.
//
if (!invocation_type.Equals (entry.Container.Type) &&
!TypeManager.IsNestedChildOf (invocation_type, entry.Container.Type))
continue;
break;
case MethodAttributes.FamANDAssem:
case MethodAttributes.Assembly:
//
// Check for assembly methods
//
if (mi.DeclaringType.Assembly != CodeGen.Assembly.Builder)
continue;
break;
}
return entry.Member;
}
return null;
}
///
/// The method is looking for conflict with inherited symbols (errors CS0108, CS0109).
/// We handle two cases. The first is for types without parameters (events, field, properties).
/// The second are methods, indexers and this is why ignore_complex_types is here.
/// The latest param is temporary hack. See DoDefineMembers method for more info.
///
public MemberInfo FindMemberWithSameName (string name, bool ignore_complex_types, MemberInfo ignore_member)
{
ArrayList applicable = null;
if (method_hash != null)
applicable = (ArrayList) method_hash [name];
if (applicable != null) {
for (int i = applicable.Count - 1; i >= 0; i--) {
CacheEntry entry = (CacheEntry) applicable [i];
if ((entry.EntryType & EntryType.Public) != 0)
return entry.Member;
}
}
if (member_hash == null)
return null;
applicable = (ArrayList) member_hash [name];
if (applicable != null) {
for (int i = applicable.Count - 1; i >= 0; i--) {
CacheEntry entry = (CacheEntry) applicable [i];
if ((entry.EntryType & EntryType.Public) != 0 & entry.Member != ignore_member) {
if (ignore_complex_types) {
if ((entry.EntryType & EntryType.Method) != 0)
continue;
// Does exist easier way how to detect indexer ?
if ((entry.EntryType & EntryType.Property) != 0) {
Type[] arg_types = TypeManager.GetArgumentTypes ((PropertyInfo)entry.Member);
if (arg_types.Length > 0)
continue;
}
}
return entry.Member;
}
}
}
return null;
}
Hashtable locase_table;
///
/// Builds low-case table for CLS Compliance test
///
public Hashtable GetPublicMembers ()
{
if (locase_table != null)
return locase_table;
locase_table = new Hashtable ();
foreach (DictionaryEntry entry in member_hash) {
ArrayList members = (ArrayList)entry.Value;
for (int ii = 0; ii < members.Count; ++ii) {
CacheEntry member_entry = (CacheEntry) members [ii];
if ((member_entry.EntryType & EntryType.Public) == 0)
continue;
// TODO: Does anyone know easier way how to detect that member is internal ?
switch (member_entry.EntryType & EntryType.MaskType) {
case EntryType.Constructor:
continue;
case EntryType.Field:
if ((((FieldInfo)member_entry.Member).Attributes & (FieldAttributes.Assembly | FieldAttributes.Public)) == FieldAttributes.Assembly)
continue;
break;
case EntryType.Method:
if ((((MethodInfo)member_entry.Member).Attributes & (MethodAttributes.Assembly | MethodAttributes.Public)) == MethodAttributes.Assembly)
continue;
break;
case EntryType.Property:
PropertyInfo pi = (PropertyInfo)member_entry.Member;
if (pi.GetSetMethod () == null && pi.GetGetMethod () == null)
continue;
break;
case EntryType.Event:
EventInfo ei = (EventInfo)member_entry.Member;
MethodInfo mi = ei.GetAddMethod ();
if ((mi.Attributes & (MethodAttributes.Assembly | MethodAttributes.Public)) == MethodAttributes.Assembly)
continue;
break;
}
string lcase = ((string)entry.Key).ToLower (System.Globalization.CultureInfo.InvariantCulture);
locase_table [lcase] = member_entry.Member;
break;
}
}
return locase_table;
}
public Hashtable Members {
get {
return member_hash;
}
}
///
/// Cls compliance check whether methods or constructors parameters differing only in ref or out, or in array rank
///
///
// TODO: refactor as method is always 'this'
public static void VerifyClsParameterConflict (ArrayList al, MethodCore method, MemberInfo this_builder)
{
EntryType tested_type = (method is Constructor ? EntryType.Constructor : EntryType.Method) | EntryType.Public;
for (int i = 0; i < al.Count; ++i) {
MemberCache.CacheEntry entry = (MemberCache.CacheEntry) al [i];
// skip itself
if (entry.Member == this_builder)
continue;
if ((entry.EntryType & tested_type) != tested_type)
continue;
MethodBase method_to_compare = (MethodBase)entry.Member;
AttributeTester.Result result = AttributeTester.AreOverloadedMethodParamsClsCompliant (
method.ParameterTypes, TypeManager.GetParameterData (method_to_compare).Types);
if (result == AttributeTester.Result.Ok)
continue;
IMethodData md = TypeManager.GetMethod (method_to_compare);
// TODO: now we are ignoring CLSCompliance(false) on method from other assembly which is buggy.
// However it is exactly what csc does.
if (md != null && !md.IsClsComplianceRequired ())
continue;
Report.SymbolRelatedToPreviousError (entry.Member);
switch (result) {
case AttributeTester.Result.RefOutArrayError:
Report.Error (3006, method.Location, "Overloaded method `{0}' differing only in ref or out, or in array rank, is not CLS-compliant", method.GetSignatureForError ());
continue;
case AttributeTester.Result.ArrayArrayError:
Report.Error (3007, method.Location, "Overloaded method `{0}' differing only by unnamed array types is not CLS-compliant", method.GetSignatureForError ());
continue;
}
throw new NotImplementedException (result.ToString ());
}
}
}
}