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 // (C) 2004 Novell, Inc
  11
  12 using System;
  13 using System.Collections;
  14 using System.Reflection;
  15 using System.Reflection.Emit;
  16 using System.Diagnostics;
  17
  18 namespace Mono.CSharp {
  19
  20         public enum LanguageVersion
  21         {
  22                 Default = 0,
  23                 ISO_1   = 1
  24         }
  25
  26         public class RootContext {
  27
  28                 //
  29                 // Contains the parsed tree
  30                 //
  31                 static Tree tree;
  32
  33                 //
  34                 // This hashtable contains all of the #definitions across the source code
  35                 // it is used by the ConditionalAttribute handler.
  36                 //
  37                 public static Hashtable AllDefines = new Hashtable ();
  38
  39                 //
  40                 // Whether we are being linked against the standard libraries.
  41                 // This is only used to tell whether `System.Object' should
  42                 // have a base class or not.
  43                 //
  44                 public static bool StdLib = true;
  45
  46                 //
  47                 // This keeps track of the order in which classes were defined
  48                 // so that we can poulate them in that order.
  49                 //
  50                 // Order is important, because we need to be able to tell, by
  51                 // examining the list of methods of the base class, which ones are virtual
  52                 // or abstract as well as the parent names (to implement new,
  53                 // override).
  54                 //
  55                 static ArrayList type_container_resolve_order;
  56                 static ArrayList attribute_types;
  57
  58                 //
  59                 // Holds a reference to the Private Implementation Details
  60                 // class.
  61                 //
  62                 static ArrayList helper_classes;
  63
  64                 static TypeBuilder impl_details_class;
  65
  66                 public static int WarningLevel = 3;
  67
  68                 public static Target Target = Target.Exe;
  69                 public static string TargetExt = ".exe";
  70
  71                 public static bool VerifyClsCompliance = true;
  72
  73                 public static LanguageVersion Version = LanguageVersion.Default;
  74
  75                 //
  76                 // We keep strongname related info here because
  77                 // it's also used as complier options from CSC 8.x
  78                 //
  79                 public static string StrongNameKeyFile;
  80                 public static string StrongNameKeyContainer;
  81                 public static bool StrongNameDelaySign = false;
  82
  83                 //
  84                 // If set, enable XML documentation generation
  85                 //
  86                 public static Documentation Documentation;
  87
  88                 //
  89                 // Constructor
  90                 //
  91                 static RootContext ()
  92                 {
  93                         tree = new Tree ();
  94                         type_container_resolve_order = new ArrayList ();
  95                 }
  96
  97                 public static bool NeedsEntryPoint {
  98                         get {
  99                                 return RootContext.Target == Target.Exe || RootContext.Target == Target.WinExe;
 100                         }
 101                 }
 102
 103                 static public Tree Tree {
 104                         get {
 105                                 return tree;
 106                         }
 107                 }
 108
 109                 static public string MainClass;
 110
 111                 public static void RegisterOrder (TypeContainer tc)
 112                 {
 113                         type_container_resolve_order.Add (tc);
 114                 }
 115
 116                 public static void RegisterAttribute (TypeContainer tc)
 117                 {
 118                         if (attribute_types == null)
 119                                 attribute_types = new ArrayList ();
 120
 121                         attribute_types.Add (tc);
 122                 }
 123
 124                 //
 125                 // The default compiler checked state
 126                 //
 127                 static public bool Checked = false;
 128
 129                 //
 130                 // Whether to allow Unsafe code
 131                 //
 132                 static public bool Unsafe = false;
 133
 134                 static string MakeFQN (string nsn, string name)
 135                 {
 136                         if (nsn == "")
 137                                 return name;
 138                         return String.Concat (nsn, ".", name);
 139                 }
 140
 141                 // <remarks>
 142                 //   This function is used to resolve the hierarchy tree.
 143                 //   It processes interfaces, structs and classes in that order.
 144                 //
 145                 //   It creates the TypeBuilder's as it processes the user defined
 146                 //   types.
 147                 // </remarks>
 148                 static public void ResolveTree ()
 149                 {
 150                         //
 151                         // Process the attribute types separately and before anything else
 152                         //
 153                         if (attribute_types != null)
 154                                 foreach (TypeContainer tc in attribute_types)
 155                                         tc.DefineType ();
 156
 157                         //
 158                         // Interfaces are processed next, as classes and
 159                         // structs might inherit from an object or implement
 160                         // a set of interfaces, we need to be able to tell
 161                         // them appart by just using the TypeManager.
 162                         //
 163                         TypeContainer root = Tree.Types;
 164
 165                         ArrayList ifaces = root.Interfaces;
 166                         if (ifaces != null){
 167                                 foreach (Interface i in ifaces)
 168                                         i.DefineType ();
 169                         }
 170
 171                         foreach (TypeContainer tc in root.Types)
 172                                 tc.DefineType ();
 173
 174                         if (root.Delegates != null)
 175                                 foreach (Delegate d in root.Delegates)
 176                                         d.DefineType ();
 177
 178                         if (root.Enums != null)
 179                                 foreach (Enum e in root.Enums)
 180                                         e.DefineType ();
 181                 }
 182
 183                 static void Error_TypeConflict (string name, Location loc)
 184                 {
 185                         Report.Error (
 186                                 520, loc, "`" + name + "' conflicts with a predefined type");
 187                 }
 188
 189                 static void Error_TypeConflict (string name)
 190                 {
 191                         Report.Error (
 192                                 520, "`" + name + "' conflicts with a predefined type");
 193                 }
 194
 195                 //
 196                 // Resolves a single class during the corlib bootstrap process
 197                 //
 198                 static TypeBuilder BootstrapCorlib_ResolveClass (TypeContainer root, string name)
 199                 {
 200                         object o = root.GetDefinition (name);
 201                         if (o == null){
 202                                 Report.Error (518, "The predefined type `" + name + "' is not defined");
 203                                 return null;
 204                         }
 205
 206                         if (!(o is Class)){
 207                                 if (o is DeclSpace){
 208                                         DeclSpace d = (DeclSpace) o;
 209
 210                                         Error_TypeConflict (name, d.Location);
 211                                 } else
 212                                         Error_TypeConflict (name);
 213
 214                                 return null;
 215                         }
 216
 217                         return ((DeclSpace) o).DefineType ();
 218                 }
 219
 220                 //
 221                 // Resolves a struct during the corlib bootstrap process
 222                 //
 223                 static void BootstrapCorlib_ResolveStruct (TypeContainer root, string name)
 224                 {
 225                         object o = root.GetDefinition (name);
 226                         if (o == null){
 227                                 Report.Error (518, "The predefined type `" + name + "' is not defined");
 228                                 return;
 229                         }
 230
 231                         if (!(o is Struct)){
 232                                 if (o is DeclSpace){
 233                                         DeclSpace d = (DeclSpace) o;
 234
 235                                         Error_TypeConflict (name, d.Location);
 236                                 } else
 237                                         Error_TypeConflict (name);
 238
 239                                 return;
 240                         }
 241
 242                         ((DeclSpace) o).DefineType ();
 243                 }
 244
 245                 //
 246                 // Resolves a struct during the corlib bootstrap process
 247                 //
 248                 static void BootstrapCorlib_ResolveInterface (TypeContainer root, string name)
 249                 {
 250                         object o = root.GetDefinition (name);
 251                         if (o == null){
 252                                 Report.Error (518, "The predefined type `" + name + "' is not defined");
 253                                 return;
 254                         }
 255
 256                         if (!(o is Interface)){
 257                                 if (o is DeclSpace){
 258                                         DeclSpace d = (DeclSpace) o;
 259
 260                                         Error_TypeConflict (name, d.Location);
 261                                 } else
 262                                         Error_TypeConflict (name);
 263
 264                                 return;
 265                         }
 266
 267                         ((DeclSpace) o).DefineType ();
 268                 }
 269
 270                 //
 271                 // Resolves a delegate during the corlib bootstrap process
 272                 //
 273                 static void BootstrapCorlib_ResolveDelegate (TypeContainer root, string name)
 274                 {
 275                         object o = root.GetDefinition (name);
 276                         if (o == null){
 277                                 Report.Error (518, "The predefined type `" + name + "' is not defined");
 278                                 Environment.Exit (1);
 279                         }
 280
 281                         if (!(o is Delegate)){
 282                                 Error_TypeConflict (name);
 283                                 return;
 284                         }
 285
 286                         ((DeclSpace) o).DefineType ();
 287                 }
 288
 289
 290                 /// <summary>
 291                 ///    Resolves the core types in the compiler when compiling with --nostdlib
 292                 /// </summary>
 293                 static public void ResolveCore ()
 294                 {
 295                         TypeContainer root = Tree.Types;
 296
 297                         TypeManager.object_type = BootstrapCorlib_ResolveClass (root, "System.Object");
 298                         TypeManager.value_type = BootstrapCorlib_ResolveClass (root, "System.ValueType");
 299                         TypeManager.attribute_type = BootstrapCorlib_ResolveClass (root, "System.Attribute");
 300
 301                         string [] interfaces_first_stage = {
 302                                 "System.IComparable", "System.ICloneable",
 303                                 "System.IConvertible",
 304
 305                                 "System.Collections.IEnumerable",
 306                                 "System.Collections.ICollection",
 307                                 "System.Collections.IEnumerator",
 308                                 "System.Collections.IList",
 309                                 "System.IAsyncResult",
 310                                 "System.IDisposable",
 311
 312                                 "System.Runtime.Serialization.ISerializable",
 313
 314                                 "System.Reflection.IReflect",
 315                                 "System.Reflection.ICustomAttributeProvider"
 316                         };
 317
 318                         foreach (string iname in interfaces_first_stage)
 319                                 BootstrapCorlib_ResolveInterface (root, iname);
 320
 321                         //
 322                         // These are the base value types
 323                         //
 324                         string [] structs_first_stage = {
 325                                 "System.Byte",    "System.SByte",
 326                                 "System.Int16",   "System.UInt16",
 327                                 "System.Int32",   "System.UInt32",
 328                                 "System.Int64",   "System.UInt64",
 329                         };
 330
 331                         foreach (string cname in structs_first_stage)
 332                                 BootstrapCorlib_ResolveStruct (root, cname);
 333
 334                         //
 335                         // Now, we can load the enumerations, after this point,
 336                         // we can use enums.
 337                         //
 338                         TypeManager.InitEnumUnderlyingTypes ();
 339
 340                         string [] structs_second_stage = {
 341                                 "System.Single",  "System.Double",
 342                                 "System.Char",    "System.Boolean",
 343                                 "System.Decimal", "System.Void",
 344                                 "System.RuntimeFieldHandle",
 345                                 "System.RuntimeArgumentHandle",
 346                                 "System.RuntimeTypeHandle",
 347                                 "System.IntPtr",
 348                                 "System.TypedReference",
 349                                 "System.ArgIterator"
 350                         };
 351
 352                         foreach (string cname in structs_second_stage)
 353                                 BootstrapCorlib_ResolveStruct (root, cname);
 354
 355                         //
 356                         // These are classes that depends on the core interfaces
 357                         //
 358                         string [] classes_second_stage = {
 359                                 "System.Reflection.MemberInfo",
 360                                 "System.Type",
 361                                 "System.Exception",
 362
 363                                 //
 364                                 // These are not really important in the order, but they
 365                                 // are used by the compiler later on (typemanager/CoreLookupType-d)
 366                                 //
 367                                 "System.Runtime.CompilerServices.RuntimeHelpers",
 368                                 "System.Reflection.DefaultMemberAttribute",
 369                                 "System.Threading.Monitor",
 370
 371                                 "System.AttributeUsageAttribute",
 372                                 "System.Runtime.InteropServices.DllImportAttribute",
 373                                 "System.Runtime.CompilerServices.MethodImplAttribute",
 374                                 "System.Runtime.InteropServices.MarshalAsAttribute",
 375                                 "System.Diagnostics.ConditionalAttribute",
 376                                 "System.ObsoleteAttribute",
 377                                 "System.ParamArrayAttribute",
 378                                 "System.CLSCompliantAttribute",
 379                                 "System.Security.UnverifiableCodeAttribute",
 380                                 "System.Security.Permissions.SecurityAttribute",
 381                                 "System.Runtime.CompilerServices.IndexerNameAttribute",
 382                                 "System.Runtime.CompilerServices.DecimalConstantAttribute",
 383                                 "System.Runtime.InteropServices.InAttribute",
 384                                 "System.Runtime.InteropServices.OutAttribute",
 385                                 "System.Runtime.InteropServices.StructLayoutAttribute",
 386                                 "System.Runtime.InteropServices.FieldOffsetAttribute",
 387                                 "System.InvalidOperationException",
 388                                 "System.NotSupportedException",
 389                                 "System.MarshalByRefObject",
 390                                 "System.Security.CodeAccessPermission"
 391                         };
 392
 393                         // We must store them here before calling BootstrapCorlib_ResolveDelegate.
 394                         TypeManager.string_type = BootstrapCorlib_ResolveClass (root, "System.String");
 395                         TypeManager.enum_type = BootstrapCorlib_ResolveClass (root, "System.Enum");
 396                         TypeManager.array_type = BootstrapCorlib_ResolveClass (root, "System.Array");
 397                         TypeManager.multicast_delegate_type = BootstrapCorlib_ResolveClass (root, "System.MulticastDelegate");
 398                         TypeManager.delegate_type = BootstrapCorlib_ResolveClass (root, "System.Delegate");
 399
 400                         foreach (string cname in classes_second_stage)
 401                                 BootstrapCorlib_ResolveClass (root, cname);
 402
 403                         BootstrapCorlib_ResolveDelegate (root, "System.AsyncCallback");
 404                 }
 405
 406                 // <summary>
 407                 //   Closes all open types
 408                 // </summary>
 409                 //
 410                 // <remarks>
 411                 //   We usually use TypeBuilder types.  When we are done
 412                 //   creating the type (which will happen after we have added
 413                 //   methods, fields, etc) we need to "Define" them before we
 414                 //   can save the Assembly
 415                 // </remarks>
 416                 static public void CloseTypes ()
 417                 {
 418                         TypeContainer root = Tree.Types;
 419
 420                         if (root.Enums != null)
 421                                 foreach (Enum en in root.Enums)
 422                                         en.CloseType ();
 423
 424                         if (attribute_types != null)
 425                                 foreach (TypeContainer tc in attribute_types)
 426                                         tc.CloseType ();
 427
 428                         //
 429                         // We do this in two passes, first we close the structs,
 430                         // then the classes, because it seems the code needs it this
 431                         // way.  If this is really what is going on, we should probably
 432                         // make sure that we define the structs in order as well.
 433                         //
 434                         foreach (TypeContainer tc in type_container_resolve_order){
 435                                 if (tc.Kind == Kind.Struct && tc.Parent == tree.Types){
 436                                         tc.CloseType ();
 437                                 }
 438                         }
 439
 440                         foreach (TypeContainer tc in type_container_resolve_order){
 441                                 if (!(tc.Kind == Kind.Struct && tc.Parent == tree.Types))
 442                                         tc.CloseType ();
 443                         }
 444
 445                         if (root.Delegates != null)
 446                                 foreach (Delegate d in root.Delegates)
 447                                         d.CloseType ();
 448
 449
 450                         //
 451                         // If we have a <PrivateImplementationDetails> class, close it
 452                         //
 453                         if (helper_classes != null){
 454                                 foreach (TypeBuilder type_builder in helper_classes)
 455                                         type_builder.CreateType ();
 456                         }
 457
 458                         attribute_types = null;
 459                         type_container_resolve_order = null;
 460                         helper_classes = null;
 461                         //tree = null;
 462                         TypeManager.CleanUp ();
 463                 }
 464
 465                 /// <summary>
 466                 ///   Used to register classes that need to be closed after all the
 467                 ///   user defined classes
 468                 /// </summary>
 469                 public static void RegisterHelperClass (TypeBuilder helper_class)
 470                 {
 471                         if (helper_classes == null)
 472                                 helper_classes = new ArrayList ();
 473                         helper_classes.Add (helper_class);
 474                 }
 475
 476                 static Type NamespaceLookup (DeclSpace ds, string name, Location loc)
 477                 {
 478                         IAlias result = ds.NamespaceEntry.LookupNamespaceOrType (ds, name, loc);
 479                         if (result == null)
 480                                 return null;
 481
 482                         if (!result.IsType)
 483                                 return null;
 484
 485                         TypeExpr texpr = result.ResolveAsType (ds.EmitContext);
 486                         if (texpr == null)
 487                                 return null;
 488
 489                         return texpr.Type;
 490                 }
 491
 492                 //
 493                 // Public function used to locate types, this can only
 494                 // be used after the ResolveTree function has been invoked.
 495                 //
 496                 // Returns: Type or null if they type can not be found.
 497                 //
 498                 // Come to think of it, this should be a DeclSpace
 499                 //
 500                 static public Type LookupType (DeclSpace ds, string name, bool silent, Location loc)
 501                 {
 502                         Type t;
 503
 504                         if (ds.Cache.Contains (name)) {
 505                                 t = (Type) ds.Cache [name];
 506                         } else {
 507                                 //
 508                                 // For the case the type we are looking for is nested within this one
 509                                 // or is in any base class
 510                                 //
 511                                 DeclSpace containing_ds = ds;
 512                                 while (containing_ds != null){
 513
 514                                         // if the member cache has been created, lets use it.
 515                                         // the member cache is MUCH faster.
 516                                         if (containing_ds.MemberCache != null) {
 517                                                 t = containing_ds.MemberCache.FindNestedType (name);
 518                                                 if (t == null) {
 519                                                         containing_ds = containing_ds.Parent;
 520                                                         continue;
 521                                                 }
 522
 523                                                 ds.Cache [name] = t;
 524                                                 return t;
 525                                         }
 526
 527                                         // no member cache. Do it the hard way -- reflection
 528                                         Type current_type = containing_ds.TypeBuilder;
 529
 530                                         while (current_type != null &&
 531                                                current_type != TypeManager.object_type) {
 532                                                 //
 533                                                 // nested class
 534                                                 //
 535                                                 t = TypeManager.LookupType (current_type.FullName + "." + name);
 536                                                 if (t != null){
 537                                                         ds.Cache [name] = t;
 538                                                         return t;
 539                                                 }
 540
 541                                                 current_type = current_type.BaseType;
 542                                         }
 543
 544                                         containing_ds = containing_ds.Parent;
 545                                 }
 546
 547                                 t = NamespaceLookup (ds, name, loc);
 548                                 if (!silent || t != null)
 549                                         ds.Cache [name] = t;
 550                         }
 551
 552                         if (t == null && !silent)
 553                                 Report.Error (246, loc, "Cannot find type `"+name+"'");
 554
 555                         return t;
 556                 }
 557
 558                 // <summary>
 559                 //   This is the silent version of LookupType, you can use this
 560                 //   to `probe' for a type
 561                 // </summary>
 562                 static public Type LookupType (TypeContainer tc, string name, Location loc)
 563                 {
 564                         return LookupType (tc, name, true, loc);
 565                 }
 566
 567                 static void Report1530 (Location loc)
 568                 {
 569                         Report.Error (1530, loc, "Keyword new not allowed for namespace elements");
 570                 }
 571
 572                 static public void PopulateCoreType (TypeContainer root, string name)
 573                 {
 574                         DeclSpace ds = (DeclSpace) root.GetDefinition (name);
 575
 576                         ds.DefineMembers (root);
 577                         ds.Define ();
 578                 }
 579
 580                 static public void BootCorlib_PopulateCoreTypes ()
 581                 {
 582                         TypeContainer root = tree.Types;
 583
 584                         PopulateCoreType (root, "System.Object");
 585                         PopulateCoreType (root, "System.ValueType");
 586                         PopulateCoreType (root, "System.Attribute");
 587                 }
 588
 589                 // <summary>
 590                 //   Populates the structs and classes with fields and methods
 591                 // </summary>
 592                 //
 593                 // This is invoked after all interfaces, structs and classes
 594                 // have been defined through `ResolveTree'
 595                 static public void PopulateTypes ()
 596                 {
 597                         TypeContainer root = Tree.Types;
 598
 599                         if (attribute_types != null)
 600                                 foreach (TypeContainer tc in attribute_types)
 601                                         tc.DefineMembers (root);
 602
 603                         if (type_container_resolve_order != null){
 604                                 if (RootContext.StdLib){
 605                                         foreach (TypeContainer tc in type_container_resolve_order)
 606                                                 tc.DefineMembers (root);
 607                                 } else {
 608                                         foreach (TypeContainer tc in type_container_resolve_order) {
 609                                                 // When compiling corlib, these types have already been
 610                                                 // populated from BootCorlib_PopulateCoreTypes ().
 611                                                 if (((tc.Name == "System.Object") ||
 612                                                      (tc.Name == "System.Attribute") ||
 613                                                      (tc.Name == "System.ValueType")))
 614                                                 continue;
 615
 616                                                 tc.DefineMembers (root);
 617                                         }
 618                                 }
 619                         }
 620
 621                         ArrayList delegates = root.Delegates;
 622                         if (delegates != null){
 623                                 foreach (Delegate d in delegates)
 624                                         if ((d.ModFlags & Modifiers.NEW) == 0)
 625                                                 d.DefineMembers (root);
 626                                         else
 627                                                 Report1530 (d.Location);
 628                         }
 629
 630                         ArrayList enums = root.Enums;
 631                         if (enums != null){
 632                                 foreach (Enum en in enums)
 633                                         if ((en.ModFlags & Modifiers.NEW) == 0)
 634                                                 en.DefineMembers (root);
 635                                         else
 636                                                 Report1530 (en.Location);
 637                         }
 638
 639                         //
 640                         // Check for cycles in the struct layout
 641                         //
 642                         if (type_container_resolve_order != null){
 643                                 Hashtable seen = new Hashtable ();
 644                                 foreach (TypeContainer tc in type_container_resolve_order)
 645                                         TypeManager.CheckStructCycles (tc, seen);
 646                         }
 647                 }
 648
 649                 //
 650                 // A generic hook delegate
 651                 //
 652                 public delegate void Hook ();
 653
 654                 //
 655                 // A hook invoked when the code has been generated.
 656                 //
 657                 public static event Hook EmitCodeHook;
 658
 659                 //
 660                 // DefineTypes is used to fill in the members of each type.
 661                 //
 662                 static public void DefineTypes ()
 663                 {
 664                         TypeContainer root = Tree.Types;
 665
 666                         if (attribute_types != null)
 667                                 foreach (TypeContainer tc in attribute_types)
 668                                         tc.Define ();
 669
 670                         if (type_container_resolve_order != null){
 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 (!RootContext.StdLib &&
 675                                             ((tc.Name == "System.Object") ||
 676                                              (tc.Name == "System.Attribute") ||
 677                                              (tc.Name == "System.ValueType")))
 678                                                 continue;
 679
 680                                         if ((tc.ModFlags & Modifiers.NEW) == 0)
 681                                                 tc.Define ();
 682                                 }
 683                         }
 684
 685                         ArrayList delegates = root.Delegates;
 686                         if (delegates != null){
 687                                 foreach (Delegate d in delegates)
 688                                         if ((d.ModFlags & Modifiers.NEW) == 0)
 689                                                 d.Define ();
 690                         }
 691
 692                         ArrayList enums = root.Enums;
 693                         if (enums != null){
 694                                 foreach (Enum en in enums)
 695                                         if ((en.ModFlags & Modifiers.NEW) == 0)
 696                                                 en.Define ();
 697                         }
 698                 }
 699
 700                 static public void EmitCode ()
 701                 {
 702                         if (attribute_types != null)
 703                                 foreach (TypeContainer tc in attribute_types)
 704                                         tc.EmitType ();
 705
 706                         CodeGen.Assembly.Emit (Tree.Types);
 707                         CodeGen.Module.Emit (Tree.Types);
 708
 709                         if (Tree.Types.Enums != null) {
 710                                 foreach (Enum e in Tree.Types.Enums)
 711                                         e.Emit ();
 712                         }
 713
 714                         if (type_container_resolve_order != null) {
 715                                 foreach (TypeContainer tc in type_container_resolve_order)
 716                                         tc.EmitType ();
 717                         }
 718
 719                         if (Tree.Types.Delegates != null) {
 720                                 foreach (Delegate d in Tree.Types.Delegates)
 721                                         d.Emit ();
 722                         }
 723                         //
 724                         // Run any hooks after all the types have been defined.
 725                         // This is used to create nested auxiliary classes for example
 726                         //
 727
 728                         if (EmitCodeHook != null)
 729                                 EmitCodeHook ();
 730                 }
 731
 732                 //
 733                 // Public Field, used to track which method is the public entry
 734                 // point.
 735                 //
 736                 static public MethodInfo EntryPoint;
 737
 738                 //
 739                 // Track the location of the entry point.
 740                 //
 741                 static public Location EntryPointLocation;
 742
 743                 //
 744                 // These are used to generate unique names on the structs and fields.
 745                 //
 746                 static int field_count;
 747
 748                 //
 749                 // Makes an initialized struct, returns the field builder that
 750                 // references the data.  Thanks go to Sergey Chaban for researching
 751                 // how to do this.  And coming up with a shorter mechanism than I
 752                 // was able to figure out.
 753                 //
 754                 // This works but makes an implicit public struct $ArrayType$SIZE and
 755                 // makes the fields point to it.  We could get more control if we did
 756                 // use instead:
 757                 //
 758                 // 1. DefineNestedType on the impl_details_class with our struct.
 759                 //
 760                 // 2. Define the field on the impl_details_class
 761                 //
 762                 static public FieldBuilder MakeStaticData (byte [] data)
 763                 {
 764                         FieldBuilder fb;
 765
 766                         if (impl_details_class == null){
 767                                 impl_details_class = CodeGen.Module.Builder.DefineType (
 768                                         "<PrivateImplementationDetails>",
 769                                         TypeAttributes.NotPublic,
 770                                         TypeManager.object_type);
 771
 772                                 RegisterHelperClass (impl_details_class);
 773                         }
 774
 775                         fb = impl_details_class.DefineInitializedData (
 776                                 "$$field-" + (field_count++), data,
 777                                 FieldAttributes.Static | FieldAttributes.Assembly);
 778
 779                         return fb;
 780                 }
 781         }
 782 }
 783
 784