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 enum LanguageVersion
  20         {
  21                 Default = 0,
  22                 ISO_1   = 1
  23         }
  24
  25         public class RootContext {
  26
  27                 //
  28                 // Contains the parsed tree
  29                 //
  30                 static Tree tree;
  31
  32                 //
  33                 // This hashtable contains all of the #definitions across the source code
  34                 // it is used by the ConditionalAttribute handler.
  35                 //
  36                 public static Hashtable AllDefines = new Hashtable ();
  37
  38                 //
  39                 // Whether we are being linked against the standard libraries.
  40                 // This is only used to tell whether `System.Object' should
  41                 // have a parent or not.
  42                 //
  43                 public static bool StdLib = true;
  44
  45                 //
  46                 // This keeps track of the order in which classes were defined
  47                 // so that we can poulate them in that order.
  48                 //
  49                 // Order is important, because we need to be able to tell by
  50                 // examining the parent's list of methods which ones are virtual
  51                 // or abstract as well as the parent names (to implement new,
  52                 // override).
  53                 //
  54                 static ArrayList type_container_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                 public static Target Target = Target.Exe;
  68                 public static string TargetExt = ".exe";
  69
  70                 public static bool VerifyClsCompliance = true;
  71
  72                 public static LanguageVersion Version = LanguageVersion.Default;
  73
  74                 //
  75                 // We keep strongname related info here because
  76                 // it's also used as complier options from CSC 8.x
  77                 //
  78                 public static string StrongNameKeyFile;
  79                 public static string StrongNameKeyContainer;
  80                 public static bool StrongNameDelaySign = false;
  81
  82                 //
  83                 // Constructor
  84                 //
  85                 static RootContext ()
  86                 {
  87                         tree = new Tree ();
  88                         type_container_resolve_order = new ArrayList ();
  89                 }
  90
  91                 public static bool NeedsEntryPoint {
  92                         get {
  93                                 return RootContext.Target == Target.Exe || RootContext.Target == Target.WinExe;
  94                         }
  95                 }
  96
  97                 static public Tree Tree {
  98                         get {
  99                                 return tree;
 100                         }
 101                 }
 102
 103                 static public string MainClass;
 104
 105                 public static void RegisterOrder (TypeContainer tc)
 106                 {
 107                         type_container_resolve_order.Add (tc);
 108                 }
 109
 110                 public static void RegisterAttribute (TypeContainer tc)
 111                 {
 112                         if (attribute_types == null)
 113                                 attribute_types = new ArrayList ();
 114
 115                         attribute_types.Add (tc);
 116                 }
 117
 118                 //
 119                 // The default compiler checked state
 120                 //
 121                 static public bool Checked = false;
 122
 123                 //
 124                 // Whether to allow Unsafe code
 125                 //
 126                 static public bool Unsafe = false;
 127
 128                 static string MakeFQN (string nsn, string name)
 129                 {
 130                         if (nsn == "")
 131                                 return name;
 132                         return String.Concat (nsn, ".", name);
 133                 }
 134
 135                 // <remarks>
 136                 //   This function is used to resolve the hierarchy tree.
 137                 //   It processes interfaces, structs and classes in that order.
 138                 //
 139                 //   It creates the TypeBuilder's as it processes the user defined
 140                 //   types.
 141                 // </remarks>
 142                 static public void ResolveTree ()
 143                 {
 144                         //
 145                         // Process the attribute types separately and before anything else
 146                         //
 147                         if (attribute_types != null)
 148                                 foreach (TypeContainer tc in attribute_types)
 149                                         tc.DefineType ();
 150
 151                         //
 152                         // Interfaces are processed next, as classes and
 153                         // structs might inherit from an object or implement
 154                         // a set of interfaces, we need to be able to tell
 155                         // them appart by just using the TypeManager.
 156                         //
 157                         TypeContainer root = Tree.Types;
 158
 159                         ArrayList ifaces = root.Interfaces;
 160                         if (ifaces != null){
 161                                 foreach (Interface i in ifaces)
 162                                         i.DefineType ();
 163                         }
 164
 165                         foreach (TypeContainer tc in root.Types)
 166                                 tc.DefineType ();
 167
 168                         if (root.Delegates != null)
 169                                 foreach (Delegate d in root.Delegates)
 170                                         d.DefineType ();
 171
 172                         if (root.Enums != null)
 173                                 foreach (Enum e in root.Enums)
 174                                         e.DefineType ();
 175                 }
 176
 177                 static void Error_TypeConflict (string name, Location loc)
 178                 {
 179                         Report.Error (
 180                                 520, loc, "`" + name + "' conflicts with a predefined type");
 181                 }
 182
 183                 static void Error_TypeConflict (string name)
 184                 {
 185                         Report.Error (
 186                                 520, "`" + name + "' conflicts with a predefined type");
 187                 }
 188
 189                 //
 190                 // Resolves a single class during the corlib bootstrap process
 191                 //
 192                 static TypeBuilder BootstrapCorlib_ResolveClass (TypeContainer root, string name)
 193                 {
 194                         object o = root.GetDefinition (name);
 195                         if (o == null){
 196                                 Report.Error (518, "The predefined type `" + name + "' is not defined");
 197                                 return null;
 198                         }
 199
 200                         if (!(o is Class)){
 201                                 if (o is DeclSpace){
 202                                         DeclSpace d = (DeclSpace) o;
 203
 204                                         Error_TypeConflict (name, d.Location);
 205                                 } else
 206                                         Error_TypeConflict (name);
 207
 208                                 return null;
 209                         }
 210
 211                         return ((DeclSpace) o).DefineType ();
 212                 }
 213
 214                 //
 215                 // Resolves a struct during the corlib bootstrap process
 216                 //
 217                 static void BootstrapCorlib_ResolveStruct (TypeContainer root, string name)
 218                 {
 219                         object o = root.GetDefinition (name);
 220                         if (o == null){
 221                                 Report.Error (518, "The predefined type `" + name + "' is not defined");
 222                                 return;
 223                         }
 224
 225                         if (!(o is Struct)){
 226                                 if (o is DeclSpace){
 227                                         DeclSpace d = (DeclSpace) o;
 228
 229                                         Error_TypeConflict (name, d.Location);
 230                                 } else
 231                                         Error_TypeConflict (name);
 232
 233                                 return;
 234                         }
 235
 236                         ((DeclSpace) o).DefineType ();
 237                 }
 238
 239                 //
 240                 // Resolves a struct during the corlib bootstrap process
 241                 //
 242                 static void BootstrapCorlib_ResolveInterface (TypeContainer root, string name)
 243                 {
 244                         object o = root.GetDefinition (name);
 245                         if (o == null){
 246                                 Report.Error (518, "The predefined type `" + name + "' is not defined");
 247                                 return;
 248                         }
 249
 250                         if (!(o is Interface)){
 251                                 if (o is DeclSpace){
 252                                         DeclSpace d = (DeclSpace) o;
 253
 254                                         Error_TypeConflict (name, d.Location);
 255                                 } else
 256                                         Error_TypeConflict (name);
 257
 258                                 return;
 259                         }
 260
 261                         ((DeclSpace) o).DefineType ();
 262                 }
 263
 264                 //
 265                 // Resolves a delegate during the corlib bootstrap process
 266                 //
 267                 static void BootstrapCorlib_ResolveDelegate (TypeContainer root, string name)
 268                 {
 269                         object o = root.GetDefinition (name);
 270                         if (o == null){
 271                                 Report.Error (518, "The predefined type `" + name + "' is not defined");
 272                                 Environment.Exit (1);
 273                         }
 274
 275                         if (!(o is Delegate)){
 276                                 Error_TypeConflict (name);
 277                                 return;
 278                         }
 279
 280                         ((DeclSpace) o).DefineType ();
 281                 }
 282
 283
 284                 /// <summary>
 285                 ///    Resolves the core types in the compiler when compiling with --nostdlib
 286                 /// </summary>
 287                 static public void ResolveCore ()
 288                 {
 289                         TypeContainer root = Tree.Types;
 290
 291                         TypeManager.object_type = BootstrapCorlib_ResolveClass (root, "System.Object");
 292                         TypeManager.value_type = BootstrapCorlib_ResolveClass (root, "System.ValueType");
 293                         TypeManager.attribute_type = BootstrapCorlib_ResolveClass (root, "System.Attribute");
 294
 295                         string [] interfaces_first_stage = {
 296                                 "System.IComparable", "System.ICloneable",
 297                                 "System.IConvertible",
 298
 299                                 "System.Collections.IEnumerable",
 300                                 "System.Collections.ICollection",
 301                                 "System.Collections.IEnumerator",
 302                                 "System.Collections.IList",
 303                                 "System.IAsyncResult",
 304                                 "System.IDisposable",
 305
 306                                 "System.Runtime.Serialization.ISerializable",
 307
 308                                 "System.Reflection.IReflect",
 309                                 "System.Reflection.ICustomAttributeProvider"
 310                         };
 311
 312                         foreach (string iname in interfaces_first_stage)
 313                                 BootstrapCorlib_ResolveInterface (root, iname);
 314
 315                         //
 316                         // These are the base value types
 317                         //
 318                         string [] structs_first_stage = {
 319                                 "System.Byte",    "System.SByte",
 320                                 "System.Int16",   "System.UInt16",
 321                                 "System.Int32",   "System.UInt32",
 322                                 "System.Int64",   "System.UInt64",
 323                         };
 324
 325                         foreach (string cname in structs_first_stage)
 326                                 BootstrapCorlib_ResolveStruct (root, cname);
 327
 328                         //
 329                         // Now, we can load the enumerations, after this point,
 330                         // we can use enums.
 331                         //
 332                         TypeManager.InitEnumUnderlyingTypes ();
 333
 334                         string [] structs_second_stage = {
 335                                 "System.Single",  "System.Double",
 336                                 "System.Char",    "System.Boolean",
 337                                 "System.Decimal", "System.Void",
 338                                 "System.RuntimeFieldHandle",
 339                                 "System.RuntimeArgumentHandle",
 340                                 "System.RuntimeTypeHandle",
 341                                 "System.IntPtr",
 342                                 "System.TypedReference",
 343                                 "System.ArgIterator"
 344                         };
 345
 346                         foreach (string cname in structs_second_stage)
 347                                 BootstrapCorlib_ResolveStruct (root, cname);
 348
 349                         //
 350                         // These are classes that depends on the core interfaces
 351                         //
 352                         string [] classes_second_stage = {
 353                                 "System.Reflection.MemberInfo",
 354                                 "System.Type",
 355                                 "System.Exception",
 356
 357                                 //
 358                                 // These are not really important in the order, but they
 359                                 // are used by the compiler later on (typemanager/CoreLookupType-d)
 360                                 //
 361                                 "System.Runtime.CompilerServices.RuntimeHelpers",
 362                                 "System.Reflection.DefaultMemberAttribute",
 363                                 "System.Threading.Monitor",
 364
 365                                 "System.AttributeUsageAttribute",
 366                                 "System.Runtime.InteropServices.DllImportAttribute",
 367                                 "System.Runtime.CompilerServices.MethodImplAttribute",
 368                                 "System.Runtime.InteropServices.MarshalAsAttribute",
 369                                 "System.Diagnostics.ConditionalAttribute",
 370                                 "System.ObsoleteAttribute",
 371                                 "System.ParamArrayAttribute",
 372                                 "System.CLSCompliantAttribute",
 373                                 "System.Security.UnverifiableCodeAttribute",
 374                                 "System.Runtime.CompilerServices.IndexerNameAttribute",
 375                                 "System.Runtime.InteropServices.InAttribute",
 376                                 "System.Runtime.InteropServices.StructLayoutAttribute",
 377                                 "System.Runtime.InteropServices.FieldOffsetAttribute",
 378                                 "System.InvalidOperationException",
 379                                 "System.NotSupportedException",
 380                                 "System.MarshalByRefObject"
 381                         };
 382
 383                         // We must store them here before calling BootstrapCorlib_ResolveDelegate.
 384                         TypeManager.string_type = BootstrapCorlib_ResolveClass (root, "System.String");
 385                         TypeManager.enum_type = BootstrapCorlib_ResolveClass (root, "System.Enum");
 386                         TypeManager.array_type = BootstrapCorlib_ResolveClass (root, "System.Array");
 387                         TypeManager.multicast_delegate_type = BootstrapCorlib_ResolveClass (root, "System.MulticastDelegate");
 388                         TypeManager.delegate_type = BootstrapCorlib_ResolveClass (root, "System.Delegate");
 389
 390                         foreach (string cname in classes_second_stage)
 391                                 BootstrapCorlib_ResolveClass (root, cname);
 392
 393                         BootstrapCorlib_ResolveDelegate (root, "System.AsyncCallback");
 394                 }
 395
 396                 // <summary>
 397                 //   Closes all open types
 398                 // </summary>
 399                 //
 400                 // <remarks>
 401                 //   We usually use TypeBuilder types.  When we are done
 402                 //   creating the type (which will happen after we have added
 403                 //   methods, fields, etc) we need to "Define" them before we
 404                 //   can save the Assembly
 405                 // </remarks>
 406                 static public void CloseTypes ()
 407                 {
 408                         TypeContainer root = Tree.Types;
 409
 410                         if (root.Enums != null)
 411                                 foreach (Enum en in root.Enums)
 412                                         en.CloseType ();
 413
 414                         if (attribute_types != null)
 415                                 foreach (TypeContainer tc in attribute_types)
 416                                         tc.CloseType ();
 417
 418                         //
 419                         // We do this in two passes, first we close the structs,
 420                         // then the classes, because it seems the code needs it this
 421                         // way.  If this is really what is going on, we should probably
 422                         // make sure that we define the structs in order as well.
 423                         //
 424                         foreach (TypeContainer tc in type_container_resolve_order){
 425                                 if (tc.Kind == Kind.Struct && tc.Parent == tree.Types){
 426                                         tc.CloseType ();
 427                                 }
 428                         }
 429
 430                         foreach (TypeContainer tc in type_container_resolve_order){
 431                                 if (!(tc.Kind == Kind.Struct && tc.Parent == tree.Types))
 432                                         tc.CloseType ();
 433                         }
 434
 435                         if (root.Delegates != null)
 436                                 foreach (Delegate d in root.Delegates)
 437                                         d.CloseType ();
 438
 439
 440                         //
 441                         // If we have a <PrivateImplementationDetails> class, close it
 442                         //
 443                         if (helper_classes != null){
 444                                 foreach (TypeBuilder type_builder in helper_classes)
 445                                         type_builder.CreateType ();
 446                         }
 447
 448                         attribute_types = null;
 449                         type_container_resolve_order = null;
 450                         helper_classes = null;
 451                         //tree = null;
 452                         TypeManager.CleanUp ();
 453                 }
 454
 455                 /// <summary>
 456                 ///   Used to register classes that need to be closed after all the
 457                 ///   user defined classes
 458                 /// </summary>
 459                 public static void RegisterHelperClass (TypeBuilder helper_class)
 460                 {
 461                         if (helper_classes == null)
 462                                 helper_classes = new ArrayList ();
 463                         helper_classes.Add (helper_class);
 464                 }
 465
 466                 //
 467                 // This idea is from Felix Arrese-Igor
 468                 //
 469                 // Returns : the implicit parent of a composite namespace string
 470                 //   eg. Implicit parent of A.B is A
 471                 //
 472                 static public string ImplicitParent (string ns)
 473                 {
 474                         int i = ns.LastIndexOf ('.');
 475                         if (i < 0)
 476                                 return null;
 477
 478                         return ns.Substring (0, i);
 479                 }
 480
 481                 static Type NamespaceLookup (DeclSpace ds, string name, bool silent,
 482                                              Location loc)
 483                 {
 484                         //
 485                         // Try in the current namespace and all its implicit parents
 486                         //
 487                         for (NamespaceEntry ns = ds.NamespaceEntry; ns != null; ns = ns.ImplicitParent) {
 488                                 object result = ns.Lookup (ds, name, false, silent, loc);
 489                                 if (result == null)
 490                                         continue;
 491
 492                                 if (result is Type)
 493                                         return (Type) result;
 494
 495                                 return null;
 496                         }
 497
 498                         return null;
 499                 }
 500
 501                 //
 502                 // Public function used to locate types, this can only
 503                 // be used after the ResolveTree function has been invoked.
 504                 //
 505                 // Returns: Type or null if they type can not be found.
 506                 //
 507                 // Come to think of it, this should be a DeclSpace
 508                 //
 509                 static public Type LookupType (DeclSpace ds, string name, bool silent, Location loc)
 510                 {
 511                         Type t;
 512
 513                         if (ds.Cache.Contains (name)) {
 514                                 t = (Type) ds.Cache [name];
 515                         } else {
 516                                 //
 517                                 // For the case the type we are looking for is nested within this one
 518                                 // or is in any base class
 519                                 //
 520                                 DeclSpace containing_ds = ds;
 521                                 while (containing_ds != null){
 522
 523                                         // if the member cache has been created, lets use it.
 524                                         // the member cache is MUCH faster.
 525                                         if (containing_ds.MemberCache != null) {
 526                                                 t = containing_ds.MemberCache.FindNestedType (name);
 527                                                 if (t == null) {
 528                                                         containing_ds = containing_ds.Parent;
 529                                                         continue;
 530                                                 }
 531
 532                                                 ds.Cache [name] = t;
 533                                                 return t;
 534                                         }
 535
 536                                         // no member cache. Do it the hard way -- reflection
 537                                         Type current_type = containing_ds.TypeBuilder;
 538
 539                                         while (current_type != null &&
 540                                                current_type != TypeManager.object_type) {
 541                                                 //
 542                                                 // nested class
 543                                                 //
 544                                                 t = TypeManager.LookupType (current_type.FullName + "." + name);
 545                                                 if (t != null){
 546                                                         ds.Cache [name] = t;
 547                                                         return t;
 548                                                 }
 549
 550                                                 current_type = current_type.BaseType;
 551                                         }
 552
 553                                         containing_ds = containing_ds.Parent;
 554                                 }
 555
 556                                 t = NamespaceLookup (ds, name, silent, loc);
 557                                 if (!silent)
 558                                         ds.Cache [name] = t;
 559                         }
 560
 561                         if (t == null && !silent)
 562                                 Report.Error (246, loc, "Cannot find type `"+name+"'");
 563
 564                         return t;
 565                 }
 566
 567                 // <summary>
 568                 //   This is the silent version of LookupType, you can use this
 569                 //   to `probe' for a type
 570                 // </summary>
 571                 static public Type LookupType (TypeContainer tc, string name, Location loc)
 572                 {
 573                         return LookupType (tc, name, true, loc);
 574                 }
 575
 576                 static void Report1530 (Location loc)
 577                 {
 578                         Report.Error (1530, loc, "Keyword new not allowed for namespace elements");
 579                 }
 580
 581                 static public void PopulateCoreType (TypeContainer root, string name)
 582                 {
 583                         DeclSpace ds = (DeclSpace) root.GetDefinition (name);
 584
 585                         ds.DefineMembers (root);
 586                         ds.Define ();
 587                 }
 588
 589                 static public void BootCorlib_PopulateCoreTypes ()
 590                 {
 591                         TypeContainer root = tree.Types;
 592
 593                         PopulateCoreType (root, "System.Object");
 594                         PopulateCoreType (root, "System.ValueType");
 595                         PopulateCoreType (root, "System.Attribute");
 596                 }
 597
 598                 // <summary>
 599                 //   Populates the structs and classes with fields and methods
 600                 // </summary>
 601                 //
 602                 // This is invoked after all interfaces, structs and classes
 603                 // have been defined through `ResolveTree'
 604                 static public void PopulateTypes ()
 605                 {
 606                         TypeContainer root = Tree.Types;
 607
 608                         if (attribute_types != null)
 609                                 foreach (TypeContainer tc in attribute_types)
 610                                         tc.DefineMembers (root);
 611
 612                         if (type_container_resolve_order != null){
 613                                 if (RootContext.StdLib){
 614                                         foreach (TypeContainer tc in type_container_resolve_order)
 615                                                 tc.DefineMembers (root);
 616                                 } else {
 617                                         foreach (TypeContainer tc in type_container_resolve_order) {
 618                                                 // When compiling corlib, these types have already been
 619                                                 // populated from BootCorlib_PopulateCoreTypes ().
 620                                                 if (((tc.Name == "System.Object") ||
 621                                                      (tc.Name == "System.Attribute") ||
 622                                                      (tc.Name == "System.ValueType")))
 623                                                 continue;
 624
 625                                                 tc.DefineMembers (root);
 626                                         }
 627                                 }
 628                         }
 629
 630                         ArrayList delegates = root.Delegates;
 631                         if (delegates != null){
 632                                 foreach (Delegate d in delegates)
 633                                         if ((d.ModFlags & Modifiers.NEW) == 0)
 634                                                 d.DefineMembers (root);
 635                                         else
 636                                                 Report1530 (d.Location);
 637                         }
 638
 639                         ArrayList enums = root.Enums;
 640                         if (enums != null){
 641                                 foreach (Enum en in enums)
 642                                         if ((en.ModFlags & Modifiers.NEW) == 0)
 643                                                 en.DefineMembers (root);
 644                                         else
 645                                                 Report1530 (en.Location);
 646                         }
 647
 648                         //
 649                         // Check for cycles in the struct layout
 650                         //
 651                         if (type_container_resolve_order != null){
 652                                 Hashtable seen = new Hashtable ();
 653                                 foreach (TypeContainer tc in type_container_resolve_order)
 654                                         TypeManager.CheckStructCycles (tc, seen);
 655                         }
 656                 }
 657
 658                 //
 659                 // A generic hook delegate
 660                 //
 661                 public delegate void Hook ();
 662
 663                 //
 664                 // A hook invoked when the code has been generated.
 665                 //
 666                 public static event Hook EmitCodeHook;
 667
 668                 //
 669                 // DefineTypes is used to fill in the members of each type.
 670                 //
 671                 static public void DefineTypes ()
 672                 {
 673                         TypeContainer root = Tree.Types;
 674
 675                         if (attribute_types != null)
 676                                 foreach (TypeContainer tc in attribute_types)
 677                                         tc.Define ();
 678
 679                         if (type_container_resolve_order != null){
 680                                 foreach (TypeContainer tc in type_container_resolve_order) {
 681                                         // When compiling corlib, these types have already been
 682                                         // populated from BootCorlib_PopulateCoreTypes ().
 683                                         if (!RootContext.StdLib &&
 684                                             ((tc.Name == "System.Object") ||
 685                                              (tc.Name == "System.Attribute") ||
 686                                              (tc.Name == "System.ValueType")))
 687                                                 continue;
 688
 689                                         if ((tc.ModFlags & Modifiers.NEW) == 0)
 690                                                 tc.Define ();
 691                                 }
 692                         }
 693
 694                         ArrayList delegates = root.Delegates;
 695                         if (delegates != null){
 696                                 foreach (Delegate d in delegates)
 697                                         if ((d.ModFlags & Modifiers.NEW) == 0)
 698                                                 d.Define ();
 699                         }
 700
 701                         ArrayList enums = root.Enums;
 702                         if (enums != null){
 703                                 foreach (Enum en in enums)
 704                                         if ((en.ModFlags & Modifiers.NEW) == 0)
 705                                                 en.Define ();
 706                         }
 707                 }
 708
 709                 static public void EmitCode ()
 710                 {
 711                         if (attribute_types != null)
 712                                 foreach (TypeContainer tc in attribute_types)
 713                                         tc.EmitType ();
 714
 715                         CodeGen.Assembly.Emit (Tree.Types);
 716                         CodeGen.Module.Emit (Tree.Types);
 717
 718                         if (Tree.Types.Enums != null) {
 719                                 foreach (Enum e in Tree.Types.Enums)
 720                                         e.Emit ();
 721                         }
 722
 723                         if (type_container_resolve_order != null) {
 724                                 foreach (TypeContainer tc in type_container_resolve_order)
 725                                         tc.EmitType ();
 726                         }
 727
 728                         if (Tree.Types.Delegates != null) {
 729                                 foreach (Delegate d in Tree.Types.Delegates)
 730                                         d.Emit ();
 731                         }
 732                         //
 733                         // Run any hooks after all the types have been defined.
 734                         // This is used to create nested auxiliary classes for example
 735                         //
 736
 737                         if (EmitCodeHook != null)
 738                                 EmitCodeHook ();
 739                 }
 740
 741                 //
 742                 // Public Field, used to track which method is the public entry
 743                 // point.
 744                 //
 745                 static public MethodInfo EntryPoint;
 746
 747                 //
 748                 // Track the location of the entry point.
 749                 //
 750                 static public Location EntryPointLocation;
 751
 752                 //
 753                 // These are used to generate unique names on the structs and fields.
 754                 //
 755                 static int field_count;
 756
 757                 //
 758                 // Makes an initialized struct, returns the field builder that
 759                 // references the data.  Thanks go to Sergey Chaban for researching
 760                 // how to do this.  And coming up with a shorter mechanism than I
 761                 // was able to figure out.
 762                 //
 763                 // This works but makes an implicit public struct $ArrayType$SIZE and
 764                 // makes the fields point to it.  We could get more control if we did
 765                 // use instead:
 766                 //
 767                 // 1. DefineNestedType on the impl_details_class with our struct.
 768                 //
 769                 // 2. Define the field on the impl_details_class
 770                 //
 771                 static public FieldBuilder MakeStaticData (byte [] data)
 772                 {
 773                         FieldBuilder fb;
 774
 775                         if (impl_details_class == null){
 776                                 impl_details_class = CodeGen.Module.Builder.DefineType (
 777                                         "<PrivateImplementationDetails>",
 778                                         TypeAttributes.NotPublic,
 779                                         TypeManager.object_type);
 780
 781                                 RegisterHelperClass (impl_details_class);
 782                         }
 783
 784                         fb = impl_details_class.DefineInitializedData (
 785                                 "$$field-" + (field_count++), data,
 786                                 FieldAttributes.Static | FieldAttributes.Assembly);
 787
 788                         return fb;
 789                 }
 790         }
 791 }
 792
 793