mcs/mcs/rootcontext.cs

   1 //
   2 // rootcontext.cs: keeps track of our tree representation, and assemblies loaded.
   3 //
   4 // Author: Miguel de Icaza (miguel@ximian.com)
   5 //         Ravi Pratap     (ravi@ximian.com)
   6 //
   7 // Licensed under the terms of the GNU GPL
   8 //
   9 // (C) 2001 Ximian, Inc (http://www.ximian.com)
  10
  11 using System;
  12 using System.Collections;
  13 using System.Reflection;
  14 using System.Reflection.Emit;
  15 using System.Diagnostics;
  16
  17 namespace Mono.CSharp {
  18
  19         public class RootContext {
  20
  21                 //
  22                 // Contains the parsed tree
  23                 //
  24                 static Tree tree;
  25
  26                 //
  27                 // This hashtable contains all of the #definitions across the source code
  28                 // it is used by the ConditionalAttribute handler.
  29                 //
  30                 public static Hashtable AllDefines = new Hashtable ();
  31
  32                 //
  33                 // The list of global attributes (those that target the assembly)
  34                 //
  35                 static Hashtable global_attributes = new Hashtable ();
  36
  37                 //
  38                 // Whether we are being linked against the standard libraries.
  39                 // This is only used to tell whether `System.Object' should
  40                 // have a parent or not.
  41                 //
  42                 public static bool StdLib = true;
  43
  44                 //
  45                 // This keeps track of the order in which classes were defined
  46                 // so that we can poulate them in that order.
  47                 //
  48                 // Order is important, because we need to be able to tell by
  49                 // examining the parent's list of methods which ones are virtual
  50                 // or abstract as well as the parent names (to implement new,
  51                 // override).
  52                 //
  53                 static ArrayList type_container_resolve_order;
  54                 static ArrayList interface_resolve_order;
  55                 static ArrayList attribute_types;
  56
  57                 //
  58                 // Holds a reference to the Private Implementation Details
  59                 // class.
  60                 //
  61                 static ArrayList helper_classes;
  62
  63                 static TypeBuilder impl_details_class;
  64
  65                 public static int WarningLevel = 2;
  66
  67                 //
  68                 // If set, enable C# version 2 features
  69                 //
  70                 public static bool V2;
  71                 //
  72                 // Constructor
  73                 //
  74                 static RootContext ()
  75                 {
  76                         tree = new Tree ();
  77                         interface_resolve_order = new ArrayList ();
  78                         type_container_resolve_order = new ArrayList ();
  79                 }
  80
  81                 static public Tree Tree {
  82                         get {
  83                                 return tree;
  84                         }
  85                 }
  86
  87                 static public string MainClass;
  88
  89                 public static void RegisterOrder (Interface iface)
  90                 {
  91                         interface_resolve_order.Add (iface);
  92                 }
  93
  94                 public static void RegisterOrder (TypeContainer tc)
  95                 {
  96                         type_container_resolve_order.Add (tc);
  97                 }
  98
  99                 public static void RegisterAttribute (TypeContainer tc)
 100                 {
 101                         if (attribute_types == null)
 102                                 attribute_types = new ArrayList ();
 103
 104                         attribute_types.Add (tc);
 105                 }
 106
 107                 //
 108                 // The default compiler checked state
 109                 //
 110                 static public bool Checked = false;
 111
 112                 //
 113                 // Whether to allow Unsafe code
 114                 //
 115                 static public bool Unsafe = false;
 116
 117                 static string MakeFQN (string nsn, string name)
 118                 {
 119                         if (nsn == "")
 120                                 return name;
 121                         return String.Concat (nsn, ".", name);
 122                 }
 123
 124                 // <remarks>
 125                 //   This function is used to resolve the hierarchy tree.
 126                 //   It processes interfaces, structs and classes in that order.
 127                 //
 128                 //   It creates the TypeBuilder's as it processes the user defined
 129                 //   types.
 130                 // </remarks>
 131                 static public void ResolveTree ()
 132                 {
 133                         //
 134                         // Process the attribute types separately and before anything else
 135                         //
 136                         if (attribute_types != null)
 137                                 foreach (TypeContainer tc in attribute_types)
 138                                         tc.DefineType ();
 139
 140                         //
 141                         // Interfaces are processed next, as classes and
 142                         // structs might inherit from an object or implement
 143                         // a set of interfaces, we need to be able to tell
 144                         // them appart by just using the TypeManager.
 145                         //
 146                         TypeContainer root = Tree.Types;
 147
 148                         ArrayList ifaces = root.Interfaces;
 149                         if (ifaces != null){
 150                                 foreach (Interface i in ifaces)
 151                                         i.DefineType ();
 152                         }
 153
 154                         foreach (TypeContainer tc in root.Types)
 155                                 tc.DefineType ();
 156
 157                         if (root.Delegates != null)
 158                                 foreach (Delegate d in root.Delegates)
 159                                         d.DefineType ();
 160
 161                         if (root.Enums != null)
 162                                 foreach (Enum e in root.Enums)
 163                                         e.DefineType ();
 164                 }
 165
 166                 static void Error_TypeConflict (string name, Location loc)
 167                 {
 168                         Report.Error (
 169                                 520, loc, "`" + name + "' conflicts with a predefined type");
 170                 }
 171
 172                 static void Error_TypeConflict (string name)
 173                 {
 174                         Report.Error (
 175                                 520, "`" + name + "' conflicts with a predefined type");
 176                 }
 177
 178                 //
 179                 // Resolves a single class during the corlib bootstrap process
 180                 //
 181                 static TypeBuilder BootstrapCorlib_ResolveClass (TypeContainer root, string name)
 182                 {
 183                         object o = root.GetDefinition (name);
 184                         if (o == null){
 185                                 Report.Error (518, "The predefined type `" + name + "' is not defined");
 186                                 return null;
 187                         }
 188
 189                         if (!(o is Class)){
 190                                 if (o is DeclSpace){
 191                                         DeclSpace d = (DeclSpace) o;
 192
 193                                         Error_TypeConflict (name, d.Location);
 194                                 } else
 195                                         Error_TypeConflict (name);
 196
 197                                 return null;
 198                         }
 199
 200                         return ((DeclSpace) o).DefineType ();
 201                 }
 202
 203                 //
 204                 // Resolves a struct during the corlib bootstrap process
 205                 //
 206                 static void BootstrapCorlib_ResolveStruct (TypeContainer root, string name)
 207                 {
 208                         object o = root.GetDefinition (name);
 209                         if (o == null){
 210                                 Report.Error (518, "The predefined type `" + name + "' is not defined");
 211                                 return;
 212                         }
 213
 214                         if (!(o is Struct)){
 215                                 if (o is DeclSpace){
 216                                         DeclSpace d = (DeclSpace) o;
 217
 218                                         Error_TypeConflict (name, d.Location);
 219                                 } else
 220                                         Error_TypeConflict (name);
 221
 222                                 return;
 223                         }
 224
 225                         ((DeclSpace) o).DefineType ();
 226                 }
 227
 228                 //
 229                 // Resolves a struct during the corlib bootstrap process
 230                 //
 231                 static void BootstrapCorlib_ResolveInterface (TypeContainer root, string name)
 232                 {
 233                         object o = root.GetDefinition (name);
 234                         if (o == null){
 235                                 Report.Error (518, "The predefined type `" + name + "' is not defined");
 236                                 return;
 237                         }
 238
 239                         if (!(o is Interface)){
 240                                 if (o is DeclSpace){
 241                                         DeclSpace d = (DeclSpace) o;
 242
 243                                         Error_TypeConflict (name, d.Location);
 244                                 } else
 245                                         Error_TypeConflict (name);
 246
 247                                 return;
 248                         }
 249
 250                         ((DeclSpace) o).DefineType ();
 251                 }
 252
 253                 //
 254                 // Resolves a delegate during the corlib bootstrap process
 255                 //
 256                 static void BootstrapCorlib_ResolveDelegate (TypeContainer root, string name)
 257                 {
 258                         object o = root.GetDefinition (name);
 259                         if (o == null){
 260                                 Report.Error (518, "The predefined type `" + name + "' is not defined");
 261                                 Environment.Exit (0);
 262                         }
 263
 264                         if (!(o is Delegate)){
 265                                 Error_TypeConflict (name);
 266                                 return;
 267                         }
 268
 269                         ((DeclSpace) o).DefineType ();
 270                 }
 271
 272
 273                 /// <summary>
 274                 ///    Resolves the core types in the compiler when compiling with --nostdlib
 275                 /// </summary>
 276                 static public void ResolveCore ()
 277                 {
 278                         TypeContainer root = Tree.Types;
 279
 280                         TypeManager.object_type = BootstrapCorlib_ResolveClass (root, "System.Object");
 281                         TypeManager.value_type = BootstrapCorlib_ResolveClass (root, "System.ValueType");
 282                         TypeManager.attribute_type = BootstrapCorlib_ResolveClass (root, "System.Attribute");
 283
 284                         string [] interfaces_first_stage = {
 285                                 "System.IComparable", "System.ICloneable",
 286                                 "System.IConvertible",
 287
 288                                 "System.Collections.IEnumerable",
 289                                 "System.Collections.ICollection",
 290                                 "System.Collections.IEnumerator",
 291                                 "System.Collections.IList",
 292                                 "System.IAsyncResult",
 293                                 "System.IDisposable",
 294
 295                                 "System.Runtime.Serialization.ISerializable",
 296
 297                                 "System.Reflection.IReflect",
 298                                 "System.Reflection.ICustomAttributeProvider"
 299                         };
 300
 301                         foreach (string iname in interfaces_first_stage)
 302                                 BootstrapCorlib_ResolveInterface (root, iname);
 303
 304                         //
 305                         // These are the base value types
 306                         //
 307                         string [] structs_first_stage = {
 308                                 "System.Byte",    "System.SByte",
 309                                 "System.Int16",   "System.UInt16",
 310                                 "System.Int32",   "System.UInt32",
 311                                 "System.Int64",   "System.UInt64",
 312                         };
 313
 314                         foreach (string cname in structs_first_stage)
 315                                 BootstrapCorlib_ResolveStruct (root, cname);
 316
 317                         //
 318                         // Now, we can load the enumerations, after this point,
 319                         // we can use enums.
 320                         //
 321                         TypeManager.InitEnumUnderlyingTypes ();
 322
 323                         string [] structs_second_stage = {
 324                                 "System.Single",  "System.Double",
 325                                 "System.Char",    "System.Boolean",
 326                                 "System.Decimal", "System.Void",
 327                                 "System.RuntimeFieldHandle",
 328                                 "System.RuntimeTypeHandle",
 329                                 "System.IntPtr"
 330                         };
 331
 332                         foreach (string cname in structs_second_stage)
 333                                 BootstrapCorlib_ResolveStruct (root, cname);
 334
 335                         //
 336                         // These are classes that depends on the core interfaces
 337                         //
 338                         string [] classes_second_stage = {
 339                                 "System.Reflection.MemberInfo",
 340                                 "System.Type",
 341                                 "System.Exception",
 342
 343                                 //
 344                                 // These are not really important in the order, but they
 345                                 // are used by the compiler later on (typemanager/CoreLookupType-d)
 346                                 //
 347                                 "System.Runtime.CompilerServices.RuntimeHelpers",
 348                                 "System.Reflection.DefaultMemberAttribute",
 349                                 "System.Threading.Monitor",
 350
 351                                 "System.AttributeUsageAttribute",
 352                                 "System.Runtime.InteropServices.DllImportAttribute",
 353                                 "System.Runtime.CompilerServices.MethodImplAttribute",
 354                                 "System.Runtime.InteropServices.MarshalAsAttribute",
 355                                 "System.Diagnostics.ConditionalAttribute",
 356                                 "System.ObsoleteAttribute",
 357                                 "System.ParamArrayAttribute",
 358                                 "System.Security.UnverifiableCodeAttribute",
 359                                 "System.Runtime.CompilerServices.IndexerNameAttribute",
 360                                 "System.Runtime.InteropServices.InAttribute",
 361                                 "System.InvalidOperationException"
 362
 363                         };
 364
 365                         // We must store them here before calling BootstrapCorlib_ResolveDelegate.
 366                         TypeManager.string_type = BootstrapCorlib_ResolveClass (root, "System.String");
 367                         TypeManager.enum_type = BootstrapCorlib_ResolveClass (root, "System.Enum");
 368                         TypeManager.array_type = BootstrapCorlib_ResolveClass (root, "System.Array");
 369                         TypeManager.multicast_delegate_type = BootstrapCorlib_ResolveClass (root, "System.MulticastDelegate");
 370                         TypeManager.delegate_type = BootstrapCorlib_ResolveClass (root, "System.Delegate");
 371
 372                         foreach (string cname in classes_second_stage)
 373                                 BootstrapCorlib_ResolveClass (root, cname);
 374
 375                         BootstrapCorlib_ResolveDelegate (root, "System.AsyncCallback");
 376                 }
 377
 378                 // <summary>
 379                 //   Closes all open types
 380                 // </summary>
 381                 //
 382                 // <remarks>
 383                 //   We usually use TypeBuilder types.  When we are done
 384                 //   creating the type (which will happen after we have added
 385                 //   methods, fields, etc) we need to "Define" them before we
 386                 //   can save the Assembly
 387                 // </remarks>
 388                 static public void CloseTypes ()
 389                 {
 390                         TypeContainer root = Tree.Types;
 391
 392                         ArrayList ifaces = root.Interfaces;
 393
 394                         if (root.Enums != null)
 395                                 foreach (Enum en in root.Enums)
 396                                         en.CloseType ();
 397
 398                         if (attribute_types != null)
 399                                 foreach (TypeContainer tc in attribute_types)
 400                                         tc.CloseType ();
 401
 402                         foreach (Interface iface in interface_resolve_order)
 403                                 iface.CloseType ();
 404
 405                         //
 406                         // We do this in two passes, first we close the structs,
 407                         // then the classes, because it seems the code needs it this
 408                         // way.  If this is really what is going on, we should probably
 409                         // make sure that we define the structs in order as well.
 410                         //
 411                         foreach (TypeContainer tc in type_container_resolve_order){
 412                                 if (tc is Struct && tc.Parent == tree.Types){
 413                                         tc.CloseType ();
 414                                 }
 415                         }
 416
 417                         foreach (TypeContainer tc in type_container_resolve_order){
 418                                 if (!(tc is Struct && tc.Parent == tree.Types))
 419                                         tc.CloseType ();
 420                         }
 421
 422                         if (root.Delegates != null)
 423                                 foreach (Delegate d in root.Delegates)
 424                                         d.CloseType ();
 425
 426
 427                         //
 428                         // If we have a <PrivateImplementationDetails> class, close it
 429                         //
 430                         if (helper_classes != null){
 431                                 foreach (TypeBuilder type_builder in helper_classes)
 432                                         type_builder.CreateType ();
 433                         }
 434                 }
 435
 436                 /// <summary>
 437                 ///   Used to register classes that need to be closed after all the
 438                 ///   user defined classes
 439                 /// </summary>
 440                 public static void RegisterHelperClass (TypeBuilder helper_class)
 441                 {
 442                         if (helper_classes == null)
 443                                 helper_classes = new ArrayList ();
 444                         helper_classes.Add (helper_class);
 445                 }
 446
 447                 //
 448                 // This idea is from Felix Arrese-Igor
 449                 //
 450                 // Returns : the implicit parent of a composite namespace string
 451                 //   eg. Implicit parent of A.B is A
 452                 //
 453                 static public string ImplicitParent (string ns)
 454                 {
 455                         int i = ns.LastIndexOf (".");
 456                         if (i < 0)
 457                                 return null;
 458
 459                         return ns.Substring (0, i);
 460                 }
 461
 462                 static Type NamespaceLookup (NamespaceEntry curr_ns, string name, Location loc)
 463                 {
 464                         Type t;
 465
 466                         //
 467                         // Try in the current namespace and all its implicit parents
 468                         //
 469                         for (string ns = curr_ns.Name; ns != null; ns = ImplicitParent (ns)) {
 470                                 t = TypeManager.LookupType (MakeFQN (ns, name));
 471                                 if (t != null)
 472                                         return t;
 473                         }
 474
 475                         //
 476                         // It's possible that name already is fully qualified. So we do
 477                         // a simple direct lookup without adding any namespace names
 478                         //
 479                         t = TypeManager.LookupType (name);
 480                         if (t != null)
 481                                 return t;
 482
 483                         //
 484                         // Try the aliases in the current namespace
 485                         //
 486                         string alias = curr_ns.LookupAlias (name);
 487
 488                         if (alias != null) {
 489                                 t = TypeManager.LookupType (alias);
 490                                 if (t != null)
 491                                         return t;
 492
 493                                 t = TypeManager.LookupType (MakeFQN (alias, name));
 494                                 if (t != null)
 495                                         return t;
 496                         }
 497
 498                         for (NamespaceEntry ns = curr_ns; ns != null; ns = ns.Parent) {
 499                                 //
 500                                 // Look in the namespace ns
 501                                 //
 502                                 t = TypeManager.LookupType (MakeFQN (ns.Name, name));
 503                                 if (t != null)
 504                                         return t;
 505
 506                                 //
 507                                 // Then try with the using clauses
 508                                 //
 509                                 Type match = null;
 510                                 foreach (Namespace using_ns in ns.GetUsingTable ()) {
 511                                         string full_name = DeclSpace.MakeFQN (using_ns.Name, name);
 512                                         match = TypeManager.LookupType (full_name);
 513                                         if (match != null){
 514                                                 if (t != null){
 515                                                         DeclSpace.Error_AmbiguousTypeReference (loc, name, t, match);
 516                                                         return null;
 517                                                 }
 518
 519                                                 t = match;
 520                                         }
 521                                 }
 522
 523                                 if (t != null)
 524                                         return t;
 525
 526                                 //
 527                                 // Try with aliases
 528                                 //
 529                                 string a = ns.LookupAlias (name);
 530                                 if (a != null) {
 531                                         t = TypeManager.LookupType (a);
 532                                         if (t != null)
 533                                                 return t;
 534
 535                                         t = TypeManager.LookupType (MakeFQN (a, name));
 536                                         if (t != null)
 537                                                 return t;
 538                                 }
 539                         }
 540
 541                         return null;
 542                 }
 543
 544                 //
 545                 // Public function used to locate types, this can only
 546                 // be used after the ResolveTree function has been invoked.
 547                 //
 548                 // Returns: Type or null if they type can not be found.
 549                 //
 550                 // Come to think of it, this should be a DeclSpace
 551                 //
 552                 static public Type LookupType (DeclSpace ds, string name, bool silent, Location loc)
 553                 {
 554                         Type t;
 555
 556                         if (ds.Cache.Contains (name)){
 557                                 t = (Type) ds.Cache [name];
 558                                 if (t != null)
 559                                         return t;
 560                         } else {
 561                                 //
 562                                 // For the case the type we are looking for is nested within this one
 563                                 // or is in any base class
 564                                 //
 565                                 DeclSpace containing_ds = ds;
 566                                 while (containing_ds != null){
 567                                         Type current_type = containing_ds.TypeBuilder;
 568
 569                                         while (current_type != null) {
 570                                                 //
 571                                                 // nested class
 572                                                 //
 573                                                 t = TypeManager.LookupType (current_type.FullName + "." + name);
 574                                                 if (t != null){
 575                                                         ds.Cache [name] = t;
 576                                                         return t;
 577                                                 }
 578
 579                                                 current_type = current_type.BaseType;
 580                                         }
 581
 582                                         containing_ds = containing_ds.Parent;
 583                                 }
 584
 585                                 t = NamespaceLookup (ds.Namespace, name, loc);
 586                                 if (t != null){
 587                                         ds.Cache [name] = t;
 588                                         return t;
 589                                 }
 590                         }
 591
 592                         if (!silent)
 593                                 Report.Error (246, loc, "Cannot find type `"+name+"'");
 594
 595                         return null;
 596                 }
 597
 598                 // <summary>
 599                 //   This is the silent version of LookupType, you can use this
 600                 //   to `probe' for a type
 601                 // </summary>
 602                 static public Type LookupType (TypeContainer tc, string name, Location loc)
 603                 {
 604                         return LookupType (tc, name, true, loc);
 605                 }
 606
 607                 static public bool IsNamespace (string name)
 608                 {
 609                         Namespace ns;
 610
 611                         if (tree.Namespaces != null){
 612                                 ns = (Namespace) tree.Namespaces [name];
 613
 614                                 if (ns != null)
 615                                         return true;
 616                         }
 617
 618                         return false;
 619                 }
 620
 621                 static void Report1530 (Location loc)
 622                 {
 623                         Report.Error (1530, loc, "Keyword new not allowed for namespace elements");
 624                 }
 625
 626                 static public void PopulateCoreType (TypeContainer root, string name)
 627                 {
 628                         DeclSpace ds = (DeclSpace) root.GetDefinition (name);
 629
 630                         ds.DefineMembers (root);
 631                         ds.Define (root);
 632                 }
 633
 634                 static public void BootCorlib_PopulateCoreTypes ()
 635                 {
 636                         TypeContainer root = tree.Types;
 637
 638                         PopulateCoreType (root, "System.Object");
 639                         PopulateCoreType (root, "System.ValueType");
 640                         PopulateCoreType (root, "System.Attribute");
 641                 }
 642
 643                 // <summary>
 644                 //   Populates the structs and classes with fields and methods
 645                 // </summary>
 646                 //
 647                 // This is invoked after all interfaces, structs and classes
 648                 // have been defined through `ResolveTree'
 649                 static public void PopulateTypes ()
 650                 {
 651                         TypeContainer root = Tree.Types;
 652
 653                         if (attribute_types != null)
 654                                 foreach (TypeContainer tc in attribute_types)
 655                                         tc.DefineMembers (root);
 656
 657                         if (interface_resolve_order != null){
 658                                 foreach (Interface iface in interface_resolve_order)
 659                                         if ((iface.ModFlags & Modifiers.NEW) == 0)
 660                                                 iface.DefineMembers (root);
 661                                         else
 662                                                 Report1530 (iface.Location);
 663                         }
 664
 665
 666                         if (type_container_resolve_order != null){
 667                                 if (RootContext.StdLib){
 668                                         foreach (TypeContainer tc in type_container_resolve_order)
 669                                                 tc.DefineMembers (root);
 670                                 } else {
 671                                         foreach (TypeContainer tc in type_container_resolve_order) {
 672                                                 // When compiling corlib, these types have already been
 673                                                 // populated from BootCorlib_PopulateCoreTypes ().
 674                                                 if (((tc.Name == "System.Object") ||
 675                                                      (tc.Name == "System.Attribute") ||
 676                                                      (tc.Name == "System.ValueType")))
 677                                                 continue;
 678
 679                                                 tc.DefineMembers (root);
 680                                         }
 681                                 }
 682                         }
 683
 684                         ArrayList delegates = root.Delegates;
 685                         if (delegates != null){
 686                                 foreach (Delegate d in delegates)
 687                                         if ((d.ModFlags & Modifiers.NEW) == 0)
 688                                                 d.DefineMembers (root);
 689                                         else
 690                                                 Report1530 (d.Location);
 691                         }
 692
 693                         ArrayList enums = root.Enums;
 694                         if (enums != null){
 695                                 foreach (Enum en in enums)
 696                                         if ((en.ModFlags & Modifiers.NEW) == 0)
 697                                                 en.DefineMembers (root);
 698                                         else
 699                                                 Report1530 (en.Location);
 700                         }
 701                 }
 702
 703                 //
 704                 // A generic hook delegate
 705                 //
 706                 public delegate void Hook ();
 707
 708                 //
 709                 // A hook invoked when the code has been generated.
 710                 //
 711                 public static event Hook EmitCodeHook;
 712
 713                 //
 714                 // DefineTypes is used to fill in the members of each type.
 715                 //
 716                 static public void DefineTypes ()
 717                 {
 718                         TypeContainer root = Tree.Types;
 719
 720                         if (attribute_types != null)
 721                                 foreach (TypeContainer tc in attribute_types)
 722                                         tc.Define (root);
 723
 724                         if (interface_resolve_order != null){
 725                                 foreach (Interface iface in interface_resolve_order)
 726                                         if ((iface.ModFlags & Modifiers.NEW) == 0)
 727                                                 iface.Define (root);
 728                         }
 729
 730
 731                         if (type_container_resolve_order != null){
 732                                 foreach (TypeContainer tc in type_container_resolve_order) {
 733                                         // When compiling corlib, these types have already been
 734                                         // populated from BootCorlib_PopulateCoreTypes ().
 735                                         if (!RootContext.StdLib &&
 736                                             ((tc.Name == "System.Object") ||
 737                                              (tc.Name == "System.Attribute") ||
 738                                              (tc.Name == "System.ValueType")))
 739                                                 continue;
 740
 741                                         if ((tc.ModFlags & Modifiers.NEW) == 0)
 742                                                 tc.Define (root);
 743                                 }
 744                         }
 745
 746                         ArrayList delegates = root.Delegates;
 747                         if (delegates != null){
 748                                 foreach (Delegate d in delegates)
 749                                         if ((d.ModFlags & Modifiers.NEW) == 0)
 750                                                 d.Define (root);
 751                         }
 752
 753                         ArrayList enums = root.Enums;
 754                         if (enums != null){
 755                                 foreach (Enum en in enums)
 756                                         if ((en.ModFlags & Modifiers.NEW) == 0)
 757                                                 en.Define (root);
 758                         }
 759                 }
 760
 761                 static public void EmitCode ()
 762                 {
 763                         //
 764                         // Because of the strange way in which we do things, global
 765                         // attributes must be processed first.
 766                         //
 767                         if (global_attributes.Count > 0){
 768                                 AssemblyBuilder ab = CodeGen.AssemblyBuilder;
 769                                 TypeContainer dummy = new TypeContainer (null, "", new Location (-1));
 770                                 EmitContext temp_ec = new EmitContext (
 771                                         dummy, Mono.CSharp.Location.Null, null, null, 0, false);
 772
 773                                 foreach (DictionaryEntry de in global_attributes){
 774                                         NamespaceEntry ns = (NamespaceEntry) de.Key;
 775                                         Attributes attrs = (Attributes) de.Value;
 776
 777                                         dummy.Namespace = ns;
 778                                         Attribute.ApplyAttributes (temp_ec, ab, ab, attrs);
 779                                 }
 780                         }
 781
 782                         if (attribute_types != null)
 783                                 foreach (TypeContainer tc in attribute_types)
 784                                         tc.Emit ();
 785
 786                         if (type_container_resolve_order != null) {
 787                                 foreach (TypeContainer tc in type_container_resolve_order)
 788                                         tc.EmitConstants ();
 789
 790                                 foreach (TypeContainer tc in type_container_resolve_order)
 791                                         tc.Emit ();
 792                         }
 793
 794                         //
 795                         // Run any hooks after all the types have been defined.
 796                         // This is used to create nested auxiliary classes for example
 797                         //
 798
 799                         if (EmitCodeHook != null)
 800                                 EmitCodeHook ();
 801
 802
 803                         if (Unsafe) {
 804                                 if (TypeManager.unverifiable_code_ctor == null) {
 805                                         Console.WriteLine ("Internal error ! Cannot set unverifiable code attribute.");
 806                                         return;
 807                                 }
 808
 809                                 CustomAttributeBuilder cb = new CustomAttributeBuilder (TypeManager.unverifiable_code_ctor,
 810                                                                                         new object [0]);
 811                                 CodeGen.ModuleBuilder.SetCustomAttribute (cb);
 812                         }
 813                 }
 814
 815                 //
 816                 // Public Field, used to track which method is the public entry
 817                 // point.
 818                 //
 819                 static public MethodInfo EntryPoint;
 820
 821                 //
 822                 // Track the location of the entry point.
 823                 //
 824                 static public Location EntryPointLocation;
 825
 826                 //
 827                 // These are used to generate unique names on the structs and fields.
 828                 //
 829                 static int field_count;
 830
 831                 //
 832                 // Makes an initialized struct, returns the field builder that
 833                 // references the data.  Thanks go to Sergey Chaban for researching
 834                 // how to do this.  And coming up with a shorter mechanism than I
 835                 // was able to figure out.
 836                 //
 837                 // This works but makes an implicit public struct $ArrayType$SIZE and
 838                 // makes the fields point to it.  We could get more control if we did
 839                 // use instead:
 840                 //
 841                 // 1. DefineNestedType on the impl_details_class with our struct.
 842                 //
 843                 // 2. Define the field on the impl_details_class
 844                 //
 845                 static public FieldBuilder MakeStaticData (byte [] data)
 846                 {
 847                         FieldBuilder fb;
 848                         int size = data.Length;
 849
 850                         if (impl_details_class == null){
 851                                 impl_details_class = CodeGen.ModuleBuilder.DefineType (
 852                                         "<PrivateImplementationDetails>", TypeAttributes.NotPublic, TypeManager.object_type);
 853                                 RegisterHelperClass (impl_details_class);
 854                         }
 855
 856                         fb = impl_details_class.DefineInitializedData (
 857                                 "$$field-" + (field_count++), data,
 858                                 FieldAttributes.Static | FieldAttributes.Assembly);
 859
 860                         return fb;
 861                 }
 862
 863                 //
 864                 // Adds a global attribute that was declared in `container',
 865                 // the attribute is in `attr', and it was defined at `loc'
 866                 //
 867                 static public void AddGlobalAttributeSection (TypeContainer container, AttributeSection attr)
 868                 {
 869                         NamespaceEntry ns = container.Namespace;
 870                         Attributes a = (Attributes) global_attributes [ns];
 871
 872                         if (a == null)
 873                                 global_attributes [ns] = new Attributes (attr);
 874                         else
 875                                 a.AddAttributeSection (attr);
 876                 }
 877         }
 878 }
 879
 880