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