mcs/mcs/report.cs

   1 //
   2 // report.cs: report errors and warnings.
   3 //
   4 // Author: Miguel de Icaza (miguel@ximian.com)
   5 //         Marek Safar (marek.safar@seznam.cz)
   6 //
   7 // (C) 2001 Ximian, Inc. (http://www.ximian.com)
   8 //
   9
  10 using System;
  11 using System.IO;
  12 using System.Text;
  13 using System.Collections;
  14 using System.Collections.Specialized;
  15 using System.Diagnostics;
  16 using System.Reflection;
  17 using System.Reflection.Emit;
  18
  19 namespace Mono.CSharp {
  20
  21         /// <summary>
  22         ///   This class is used to report errors and warnings t te user.
  23         /// </summary>
  24         public class Report {
  25                 /// <summary>
  26                 ///   Errors encountered so far
  27                 /// </summary>
  28                 static public int Errors;
  29
  30                 /// <summary>
  31                 ///   Warnings encountered so far
  32                 /// </summary>
  33                 static public int Warnings;
  34
  35                 /// <summary>
  36                 ///   Whether errors should be throw an exception
  37                 /// </summary>
  38                 static public bool Fatal;
  39
  40                 /// <summary>
  41                 ///   Whether warnings should be considered errors
  42                 /// </summary>
  43                 static public bool WarningsAreErrors;
  44
  45
  46                 /// <summary>
  47                 ///   Whether to dump a stack trace on errors.
  48                 /// </summary>
  49                 static public bool Stacktrace;
  50
  51                 static public TextWriter Stderr = Console.Error;
  52
  53                 //
  54                 // If the 'expected' error code is reported then the
  55                 // compilation succeeds.
  56                 //
  57                 // Used for the test suite to excercise the error codes
  58                 //
  59                 static int expected_error = 0;
  60
  61                 //
  62                 // Keeps track of the warnings that we are ignoring
  63                 //
  64                 public static Hashtable warning_ignore_table;
  65
  66                 static Hashtable warning_regions_table;
  67
  68                 //
  69                 // This is used to save/restore the error state.  When the
  70                 // error stack contains elements, warnings and errors are not
  71                 // reported to the user.  This is used by the Lambda expression
  72                 // support to compile the code with various parameter values.
  73                 // A stack because of `Report.Errors == errors;'
  74                 //
  75                 static Stack error_stack;
  76                 static Stack warning_stack;
  77                 static bool reporting_disabled;
  78
  79                 static int warning_level;
  80
  81                 /// <summary>
  82                 /// List of symbols related to reported error/warning. You have to fill it before error/warning is reported.
  83                 /// </summary>
  84                 static ArrayList extra_information = new ArrayList ();
  85
  86                 //
  87                 // IF YOU ADD A NEW WARNING YOU HAVE TO ADD ITS ID HERE
  88                 //
  89                 public static readonly int[] AllWarnings = new int[] {
  90                         28, 67, 78,
  91                         105, 108, 109, 114, 162, 164, 168, 169, 183, 184, 197,
  92                         219, 251, 252, 253, 278, 282,
  93                         419, 420, 429, 436, 440, 465, 467, 469, 472,
  94                         612, 618, 626, 628, 642, 649, 652, 658, 659, 660, 661, 665, 672, 675,
  95                         809,
  96                         1030,
  97                         1522, 1570, 1571, 1572, 1573, 1574, 1580, 1581, 1584, 1587, 1589, 1590, 1591, 1592,
  98                         1616, 1633, 1634, 1635, 1685, 1690, 1691, 1692,
  99                         1717, 1718, 1720,
 100                         1901,
 101                         2002, 2023, 2029,
 102                         3005, 3012, 3018, 3019, 3021, 3022, 3023, 3026, 3027,
 103 #if GMCS_SOURCE
 104                         402, 414, 693, 1058, 1700, 3024
 105 #endif
 106                 };
 107
 108                 static Report ()
 109                 {
 110                         // Just to be sure that binary search is working
 111                         Array.Sort (AllWarnings);
 112                 }
 113
 114                 public static void Reset ()
 115                 {
 116                         Errors = Warnings = 0;
 117                         WarningsAreErrors = false;
 118                         warning_ignore_table = null;
 119                         warning_regions_table = null;
 120                         reporting_disabled = false;
 121                 }
 122
 123                 public static void DisableReporting ()
 124                 {
 125                         if (error_stack == null)
 126                                 error_stack = new Stack ();
 127                         error_stack.Push (Errors);
 128
 129                         if (Warnings > 0) {
 130                                 if (warning_stack == null)
 131                                         warning_stack = new Stack ();
 132                                 warning_stack.Push (Warnings);
 133                         }
 134
 135                         reporting_disabled = true;
 136                 }
 137
 138                 public static void EnableReporting ()
 139                 {
 140                         if (warning_stack != null)
 141                                 Warnings = (int) warning_stack.Pop ();
 142
 143                         Errors = (int) error_stack.Pop ();
 144                         if (error_stack.Count == 0) {
 145                                 reporting_disabled = false;
 146                         }
 147                 }
 148
 149                 public static IMessageRecorder msg_recorder;
 150
 151                 public static IMessageRecorder SetMessageRecorder (IMessageRecorder recorder)
 152                 {
 153                         IMessageRecorder previous = msg_recorder;
 154                         msg_recorder = recorder;
 155                         return previous;
 156                 }
 157
 158                 public interface IMessageRecorder
 159                 {
 160                         void EndSession ();
 161                         void AddMessage (AbstractMessage msg);
 162                         bool PrintMessages ();
 163                 }
 164
 165                 //
 166                 // Default message recorder, it uses two types of message groups.
 167                 // Common messages: messages reported in all sessions.
 168                 // Merged messages: union of all messages in all sessions.
 169                 //
 170                 public struct MessageRecorder : IMessageRecorder
 171                 {
 172                         ArrayList session_messages;
 173                         //
 174                         // A collection of exactly same messages reported in all sessions
 175                         //
 176                         ArrayList common_messages;
 177
 178                         //
 179                         // A collection of unique messages reported in all sessions
 180                         //
 181                         ArrayList merged_messages;
 182
 183                         public void EndSession ()
 184                         {
 185                                 if (session_messages == null)
 186                                         return;
 187
 188                                 //
 189                                 // Handles the first session
 190                                 //
 191                                 if (common_messages == null) {
 192                                         common_messages = new ArrayList (session_messages);
 193                                         merged_messages = session_messages;
 194                                         session_messages = null;
 195                                         return;
 196                                 }
 197
 198                                 //
 199                                 // Store common messages if any
 200                                 //
 201                                 for (int i = 0; i < common_messages.Count; ++i) {
 202                                         AbstractMessage cmsg = (AbstractMessage) common_messages [i];
 203                                         bool common_msg_found = false;
 204                                         foreach (AbstractMessage msg in session_messages) {
 205                                                 if (cmsg.Equals (msg)) {
 206                                                         common_msg_found = true;
 207                                                         break;
 208                                                 }
 209                                         }
 210
 211                                         if (!common_msg_found)
 212                                                 common_messages.RemoveAt (i);
 213                                 }
 214
 215                                 //
 216                                 // Merge session and previous messages
 217                                 //
 218                                 for (int i = 0; i < session_messages.Count; ++i) {
 219                                         AbstractMessage msg = (AbstractMessage) session_messages [i];
 220                                         bool msg_found = false;
 221                                         for (int ii = 0; ii < merged_messages.Count; ++ii) {
 222                                                 if (msg.Equals (merged_messages [ii])) {
 223                                                         msg_found = true;
 224                                                         break;
 225                                                 }
 226                                         }
 227
 228                                         if (!msg_found)
 229                                                 merged_messages.Add (msg);
 230                                 }
 231                         }
 232
 233                         public void AddMessage (AbstractMessage msg)
 234                         {
 235                                 if (session_messages == null)
 236                                         session_messages = new ArrayList ();
 237
 238                                 session_messages.Add (msg);
 239                         }
 240
 241                         //
 242                         // Prints collected messages, common messages have a priority
 243                         //
 244                         public bool PrintMessages ()
 245                         {
 246                                 ArrayList messages_to_print = merged_messages;
 247                                 if (common_messages != null && common_messages.Count > 0) {
 248                                         messages_to_print = common_messages;
 249                                 }
 250
 251                                 if (messages_to_print == null)
 252                                         return false;
 253
 254                                 foreach (AbstractMessage msg in messages_to_print)
 255                                         msg.Print ();
 256
 257                                 return true;
 258                         }
 259                 }
 260
 261                 public abstract class AbstractMessage
 262                 {
 263                         readonly string[] extra_info;
 264                         protected readonly int code;
 265                         protected readonly Location location;
 266                         readonly string message;
 267
 268                         protected AbstractMessage (int code, Location loc, string msg, ArrayList extraInfo)
 269                         {
 270                                 this.code = code;
 271                                 if (code < 0)
 272                                         this.code = 8000 - code;
 273
 274                                 this.location = loc;
 275                                 this.message = msg;
 276                                 if (extraInfo.Count != 0) {
 277                                         this.extra_info = (string[])extraInfo.ToArray (typeof (string));
 278                                 }
 279                         }
 280
 281                         protected AbstractMessage (AbstractMessage aMsg)
 282                         {
 283                                 this.code = aMsg.code;
 284                                 this.location = aMsg.location;
 285                                 this.message = aMsg.message;
 286                                 this.extra_info = aMsg.extra_info;
 287                         }
 288
 289                         static void Check (int code)
 290                         {
 291                                 if (code == expected_error) {
 292                                         Environment.Exit (0);
 293                                 }
 294                         }
 295
 296                         public override bool Equals (object obj)
 297                         {
 298                                 AbstractMessage msg = obj as AbstractMessage;
 299                                 if (msg == null)
 300                                         return false;
 301
 302                                 return code == msg.code && location.Equals (msg.location) && message == msg.message;
 303                         }
 304
 305                         public override int GetHashCode ()
 306                         {
 307                                 return code.GetHashCode ();
 308                         }
 309
 310                         public abstract bool IsWarning { get; }
 311
 312                         public abstract string MessageType { get; }
 313
 314                         public virtual void Print ()
 315                         {
 316                                 if (msg_recorder != null) {
 317                                         //
 318                                         // This line is useful when debugging messages recorder
 319                                         //
 320                                         // Console.WriteLine ("RECORDING: {0} {1} {2}", code, location, message);
 321                                         msg_recorder.AddMessage (this);
 322                                         return;
 323                                 }
 324
 325                                 if (reporting_disabled)
 326                                         return;
 327
 328                                 StringBuilder msg = new StringBuilder ();
 329                                 if (!location.IsNull) {
 330                                         msg.Append (location.ToString ());
 331                                         msg.Append (" ");
 332                                 }
 333                                 msg.AppendFormat ("{0} CS{1:0000}: {2}", MessageType, code, message);
 334                                 Stderr.WriteLine (msg.ToString ());
 335
 336                                 if (extra_info != null) {
 337                                         foreach (string s in extra_info)
 338                                                 Stderr.WriteLine (s + MessageType + ")");
 339                                 }
 340
 341                                 if (Stacktrace)
 342                                         Console.WriteLine (FriendlyStackTrace (new StackTrace (true)));
 343
 344                                 if (Fatal) {
 345                                         if (!IsWarning || WarningsAreErrors)
 346                                                 throw new Exception (message);
 347                                 }
 348
 349                                 Check (code);
 350                         }
 351                 }
 352
 353                 sealed class WarningMessage : AbstractMessage
 354                 {
 355                         readonly int Level;
 356
 357                         public WarningMessage (int code, int level, Location loc, string message, ArrayList extra_info)
 358                                 : base (code, loc, message, extra_info)
 359                         {
 360                                 Level = level;
 361                         }
 362
 363                         public override bool IsWarning {
 364                                 get { return true; }
 365                         }
 366
 367                         bool IsEnabled ()
 368                         {
 369                                 if (WarningLevel < Level)
 370                                         return false;
 371
 372                                 if (warning_ignore_table != null) {
 373                                         if (warning_ignore_table.Contains (code)) {
 374                                                 return false;
 375                                         }
 376                                 }
 377
 378                                 if (warning_regions_table == null || location.IsNull)
 379                                         return true;
 380
 381                                 WarningRegions regions = (WarningRegions)warning_regions_table [location.Name];
 382                                 if (regions == null)
 383                                         return true;
 384
 385                                 return regions.IsWarningEnabled (code, location.Row);
 386                         }
 387
 388                         public override void Print ()
 389                         {
 390                                 if (!IsEnabled ())
 391                                         return;
 392
 393                                 if (WarningsAreErrors) {
 394                                         new ErrorMessage (this).Print ();
 395                                         return;
 396                                 }
 397
 398                                 Warnings++;
 399                                 base.Print ();
 400                         }
 401
 402                         public override string MessageType {
 403                                 get {
 404                                         return "warning";
 405                                 }
 406                         }
 407                 }
 408
 409                 sealed class ErrorMessage : AbstractMessage
 410                 {
 411                         public ErrorMessage (int code, Location loc, string message, ArrayList extraInfo)
 412                                 : base (code, loc, message, extraInfo)
 413                         {
 414                         }
 415
 416                         public ErrorMessage (AbstractMessage aMsg)
 417                                 : base (aMsg)
 418                         {
 419                         }
 420
 421                         public override void Print()
 422                         {
 423                                 Errors++;
 424                                 base.Print ();
 425                         }
 426
 427                         public override bool IsWarning {
 428                                 get { return false; }
 429                         }
 430
 431                         public override string MessageType {
 432                                 get {
 433                                         return "error";
 434                                 }
 435                         }
 436                 }
 437
 438                 public static void FeatureIsNotAvailable (Location loc, string feature)
 439                 {
 440                         string version;
 441                         if (RootContext.Version == LanguageVersion.ISO_1)
 442                                 version = "1.0";
 443                         else if (RootContext.Version == LanguageVersion.ISO_2)
 444                                 version = "2.0";
 445                         else
 446                                 throw new InternalErrorException ("Invalid feature version", RootContext.Version);
 447
 448                         Report.Error (1644, loc,
 449                                 "Feature `{0}' cannot be used because it is not part of the C# {1} language specification",
 450                                       feature, version);
 451                 }
 452
 453                 public static string FriendlyStackTrace (Exception e)
 454                 {
 455                         return FriendlyStackTrace (new StackTrace (e, true));
 456                 }
 457
 458                 static string FriendlyStackTrace (StackTrace t)
 459                 {
 460                         StringBuilder sb = new StringBuilder ();
 461
 462                         bool foundUserCode = false;
 463
 464                         for (int i = 0; i < t.FrameCount; i++) {
 465                                 StackFrame f = t.GetFrame (i);
 466                                 MethodBase mb = f.GetMethod ();
 467
 468                                 if (!foundUserCode && mb.ReflectedType == typeof (Report))
 469                                         continue;
 470
 471                                 foundUserCode = true;
 472
 473                                 sb.Append ("\tin ");
 474
 475                                 if (f.GetFileLineNumber () > 0)
 476                                         sb.AppendFormat ("(at {0}:{1}) ", f.GetFileName (), f.GetFileLineNumber ());
 477
 478                                 sb.AppendFormat ("{0}.{1} (", mb.ReflectedType.Name, mb.Name);
 479
 480                                 bool first = true;
 481                                 foreach (ParameterInfo pi in mb.GetParameters ()) {
 482                                         if (!first)
 483                                                 sb.Append (", ");
 484                                         first = false;
 485
 486                                         sb.Append (TypeManager.CSharpName (pi.ParameterType));
 487                                 }
 488                                 sb.Append (")\n");
 489                         }
 490
 491                         return sb.ToString ();
 492                 }
 493
 494                 public static void StackTrace ()
 495                 {
 496                         Console.WriteLine (FriendlyStackTrace (new StackTrace (true)));
 497                 }
 498
 499                 public static bool IsValidWarning (int code)
 500                 {
 501                         return Array.BinarySearch (AllWarnings, code) >= 0;
 502                 }
 503
 504                 static public void RuntimeMissingSupport (Location loc, string feature)
 505                 {
 506                         Report.Error (-88, loc, "Your .NET Runtime does not support `{0}'. Please use the latest Mono runtime instead.", feature);
 507                 }
 508
 509                 /// <summary>
 510                 /// In most error cases is very useful to have information about symbol that caused the error.
 511                 /// Call this method before you call Report.Error when it makes sense.
 512                 /// </summary>
 513                 static public void SymbolRelatedToPreviousError (Location loc, string symbol)
 514                 {
 515                         SymbolRelatedToPreviousError (loc.ToString (), symbol);
 516                 }
 517
 518                 static public void SymbolRelatedToPreviousError (MemberInfo mi)
 519                 {
 520                         if (reporting_disabled)
 521                                 return;
 522
 523                         Type dt = TypeManager.DropGenericTypeArguments (mi.DeclaringType);
 524                         DeclSpace temp_ds = TypeManager.LookupDeclSpace (dt);
 525                         if (temp_ds == null) {
 526                                 SymbolRelatedToPreviousError (dt.Assembly.Location, TypeManager.GetFullNameSignature (mi));
 527                         } else {
 528                                 MethodBase mb = mi as MethodBase;
 529                                 if (mb != null) {
 530                                         mb = TypeManager.DropGenericMethodArguments (mb);
 531                                         IMethodData md = TypeManager.GetMethod (mb);
 532                                         SymbolRelatedToPreviousError (md.Location, md.GetSignatureForError ());
 533                                         return;
 534                                 }
 535
 536                                 MemberCore mc = temp_ds.GetDefinition (mi.Name);
 537                                 SymbolRelatedToPreviousError (mc);
 538                         }
 539                 }
 540
 541                 static public void SymbolRelatedToPreviousError (MemberCore mc)
 542                 {
 543                         SymbolRelatedToPreviousError (mc.Location, mc.GetSignatureForError ());
 544                 }
 545
 546                 static public void SymbolRelatedToPreviousError (Type type)
 547                 {
 548                         if (reporting_disabled)
 549                                 return;
 550
 551                         type = TypeManager.DropGenericTypeArguments (type);
 552
 553                         if (TypeManager.IsGenericParameter (type)) {
 554                                 TypeParameter tp = TypeManager.LookupTypeParameter (type);
 555                                 if (tp != null) {
 556                                         SymbolRelatedToPreviousError (tp.Location, "");
 557                                         return;
 558                                 }
 559                         }
 560
 561                         if (type is TypeBuilder) {
 562                                 DeclSpace temp_ds = TypeManager.LookupDeclSpace (type);
 563                                 SymbolRelatedToPreviousError (temp_ds.Location, TypeManager.CSharpName (type));
 564                         } else if (type.HasElementType) {
 565                                 SymbolRelatedToPreviousError (type.GetElementType ());
 566                         } else {
 567                                 SymbolRelatedToPreviousError (type.Assembly.Location, TypeManager.CSharpName (type));
 568                         }
 569                 }
 570
 571                 static void SymbolRelatedToPreviousError (string loc, string symbol)
 572                 {
 573                         extra_information.Add (String.Format ("{0} (Location of the symbol related to previous ", loc));
 574                 }
 575
 576                 public static void ExtraInformation (Location loc, string msg)
 577                 {
 578                         extra_information.Add (String.Format ("{0} {1}", loc, msg));
 579                 }
 580
 581                 public static WarningRegions RegisterWarningRegion (Location location)
 582                 {
 583                         if (warning_regions_table == null)
 584                                 warning_regions_table = new Hashtable ();
 585
 586                         WarningRegions regions = (WarningRegions)warning_regions_table [location.Name];
 587                         if (regions == null) {
 588                                 regions = new WarningRegions ();
 589                                 warning_regions_table.Add (location.Name, regions);
 590                         }
 591                         return regions;
 592                 }
 593
 594                 static public void Warning (int code, int level, Location loc, string message)
 595                 {
 596                         WarningMessage w = new WarningMessage (code, level, loc, message, extra_information);
 597                         extra_information.Clear ();
 598                         w.Print ();
 599                 }
 600
 601                 static public void Warning (int code, int level, Location loc, string format, string arg)
 602                 {
 603                         WarningMessage w = new WarningMessage (code, level, loc, String.Format (format, arg), extra_information);
 604                         extra_information.Clear ();
 605                         w.Print ();
 606                 }
 607
 608                 static public void Warning (int code, int level, Location loc, string format, string arg1, string arg2)
 609                 {
 610                         WarningMessage w = new WarningMessage (code, level, loc, String.Format (format, arg1, arg2), extra_information);
 611                         extra_information.Clear ();
 612                         w.Print ();
 613                 }
 614
 615                 static public void Warning (int code, int level, Location loc, string format, params object[] args)
 616                 {
 617                         WarningMessage w = new WarningMessage (code, level, loc, String.Format (format, args), extra_information);
 618                         extra_information.Clear ();
 619                         w.Print ();
 620                 }
 621
 622                 static public void Warning (int code, int level, string message)
 623                 {
 624                         Warning (code, level, Location.Null, message);
 625                 }
 626
 627                 static public void Warning (int code, int level, string format, string arg)
 628                 {
 629                         Warning (code, level, Location.Null, format, arg);
 630                 }
 631
 632                 static public void Warning (int code, int level, string format, string arg1, string arg2)
 633                 {
 634                         Warning (code, level, Location.Null, format, arg1, arg2);
 635                 }
 636
 637                 static public void Warning (int code, int level, string format, params string[] args)
 638                 {
 639                         Warning (code, level, Location.Null, String.Format (format, args));
 640                 }
 641
 642                 static public void Error (int code, Location loc, string error)
 643                 {
 644                         new ErrorMessage (code, loc, error, extra_information).Print ();
 645                         extra_information.Clear ();
 646                 }
 647
 648                 static public void Error (int code, Location loc, string format, string arg)
 649                 {
 650                         new ErrorMessage (code, loc, String.Format (format, arg), extra_information).Print ();
 651                         extra_information.Clear ();
 652                 }
 653
 654                 static public void Error (int code, Location loc, string format, string arg1, string arg2)
 655                 {
 656                         new ErrorMessage (code, loc, String.Format (format, arg1, arg2), extra_information).Print ();
 657                         extra_information.Clear ();
 658                 }
 659
 660                 static public void Error (int code, Location loc, string format, params object[] args)
 661                 {
 662                         Error (code, loc, String.Format (format, args));
 663                 }
 664
 665                 static public void Error (int code, string error)
 666                 {
 667                         Error (code, Location.Null, error);
 668                 }
 669
 670                 static public void Error (int code, string format, string arg)
 671                 {
 672                         Error (code, Location.Null, format, arg);
 673                 }
 674
 675                 static public void Error (int code, string format, string arg1, string arg2)
 676                 {
 677                         Error (code, Location.Null, format, arg1, arg2);
 678                 }
 679
 680                 static public void Error (int code, string format, params string[] args)
 681                 {
 682                         Error (code, Location.Null, String.Format (format, args));
 683                 }
 684
 685                 static public void SetIgnoreWarning (int code)
 686                 {
 687                         if (warning_ignore_table == null)
 688                                 warning_ignore_table = new Hashtable ();
 689
 690                         warning_ignore_table [code] = true;
 691                 }
 692
 693                 static public int ExpectedError {
 694                         set {
 695                                 expected_error = value;
 696                         }
 697                         get {
 698                                 return expected_error;
 699                         }
 700                 }
 701
 702                 public static int WarningLevel {
 703                         get {
 704                                 return warning_level;
 705                         }
 706                         set {
 707                                 warning_level = value;
 708                         }
 709                 }
 710
 711                 public static int DebugFlags = 0;
 712
 713                 [Conditional ("MCS_DEBUG")]
 714                 static public void Debug (string message, params object[] args)
 715                 {
 716                         Debug (4, message, args);
 717                 }
 718
 719                 [Conditional ("MCS_DEBUG")]
 720                 static public void Debug (int category, string message, params object[] args)
 721                 {
 722                         if ((category & DebugFlags) == 0)
 723                                 return;
 724
 725                         StringBuilder sb = new StringBuilder (message);
 726
 727                         if ((args != null) && (args.Length > 0)) {
 728                                 sb.Append (": ");
 729
 730                                 bool first = true;
 731                                 foreach (object arg in args) {
 732                                         if (first)
 733                                                 first = false;
 734                                         else
 735                                                 sb.Append (", ");
 736                                         if (arg == null)
 737                                                 sb.Append ("null");
 738                                         else if (arg is ICollection)
 739                                                 sb.Append (PrintCollection ((ICollection) arg));
 740                                         else
 741                                                 sb.Append (arg);
 742                                 }
 743                         }
 744
 745                         Console.WriteLine (sb.ToString ());
 746                 }
 747
 748                 static public string PrintCollection (ICollection collection)
 749                 {
 750                         StringBuilder sb = new StringBuilder ();
 751
 752                         sb.Append (collection.GetType ());
 753                         sb.Append ("(");
 754
 755                         bool first = true;
 756                         foreach (object o in collection) {
 757                                 if (first)
 758                                         first = false;
 759                                 else
 760                                         sb.Append (", ");
 761                                 sb.Append (o);
 762                         }
 763
 764                         sb.Append (")");
 765                         return sb.ToString ();
 766                 }
 767         }
 768
 769         public enum TimerType {
 770                 FindMembers     = 0,
 771                 TcFindMembers   = 1,
 772                 MemberLookup    = 2,
 773                 CachedLookup    = 3,
 774                 CacheInit       = 4,
 775                 MiscTimer       = 5,
 776                 CountTimers     = 6
 777         }
 778
 779         public enum CounterType {
 780                 FindMembers     = 0,
 781                 MemberCache     = 1,
 782                 MiscCounter     = 2,
 783                 CountCounters   = 3
 784         }
 785
 786         public class Timer
 787         {
 788                 static DateTime[] timer_start;
 789                 static TimeSpan[] timers;
 790                 static long[] timer_counters;
 791                 static long[] counters;
 792
 793                 static Timer ()
 794                 {
 795                         timer_start = new DateTime [(int) TimerType.CountTimers];
 796                         timers = new TimeSpan [(int) TimerType.CountTimers];
 797                         timer_counters = new long [(int) TimerType.CountTimers];
 798                         counters = new long [(int) CounterType.CountCounters];
 799
 800                         for (int i = 0; i < (int) TimerType.CountTimers; i++) {
 801                                 timer_start [i] = DateTime.Now;
 802                                 timers [i] = TimeSpan.Zero;
 803                         }
 804                 }
 805
 806                 [Conditional("TIMER")]
 807                 static public void IncrementCounter (CounterType which)
 808                 {
 809                         ++counters [(int) which];
 810                 }
 811
 812                 [Conditional("TIMER")]
 813                 static public void StartTimer (TimerType which)
 814                 {
 815                         timer_start [(int) which] = DateTime.Now;
 816                 }
 817
 818                 [Conditional("TIMER")]
 819                 static public void StopTimer (TimerType which)
 820                 {
 821                         timers [(int) which] += DateTime.Now - timer_start [(int) which];
 822                         ++timer_counters [(int) which];
 823                 }
 824
 825                 [Conditional("TIMER")]
 826                 static public void ShowTimers ()
 827                 {
 828                         ShowTimer (TimerType.FindMembers, "- FindMembers timer");
 829                         ShowTimer (TimerType.TcFindMembers, "- TypeContainer.FindMembers timer");
 830                         ShowTimer (TimerType.MemberLookup, "- MemberLookup timer");
 831                         ShowTimer (TimerType.CachedLookup, "- CachedLookup timer");
 832                         ShowTimer (TimerType.CacheInit, "- Cache init");
 833                         ShowTimer (TimerType.MiscTimer, "- Misc timer");
 834
 835                         ShowCounter (CounterType.FindMembers, "- Find members");
 836                         ShowCounter (CounterType.MemberCache, "- Member cache");
 837                         ShowCounter (CounterType.MiscCounter, "- Misc counter");
 838                 }
 839
 840                 static public void ShowCounter (CounterType which, string msg)
 841                 {
 842                         Console.WriteLine ("{0} {1}", counters [(int) which], msg);
 843                 }
 844
 845                 static public void ShowTimer (TimerType which, string msg)
 846                 {
 847                         Console.WriteLine (
 848                                 "[{0:00}:{1:000}] {2} (used {3} times)",
 849                                 (int) timers [(int) which].TotalSeconds,
 850                                 timers [(int) which].Milliseconds, msg,
 851                                 timer_counters [(int) which]);
 852                 }
 853         }
 854
 855         public class InternalErrorException : Exception {
 856                 public InternalErrorException (MemberCore mc, Exception e)
 857                         : base (mc.Location + " " + mc.GetSignatureForError (), e)
 858                 {
 859                 }
 860
 861                 public InternalErrorException ()
 862                         : base ("Internal error")
 863                 {
 864                 }
 865
 866                 public InternalErrorException (string message)
 867                         : base (message)
 868                 {
 869                 }
 870
 871                 public InternalErrorException (string message, params object[] args)
 872                         : base (String.Format (message, args))
 873                 { }
 874
 875                 public InternalErrorException (Exception e, Location loc)
 876                         : base (loc.ToString (), e)
 877                 {
 878                 }
 879         }
 880
 881         /// <summary>
 882         /// Handles #pragma warning
 883         /// </summary>
 884         public class WarningRegions {
 885
 886                 abstract class PragmaCmd
 887                 {
 888                         public int Line;
 889
 890                         protected PragmaCmd (int line)
 891                         {
 892                                 Line = line;
 893                         }
 894
 895                         public abstract bool IsEnabled (int code, bool previous);
 896                 }
 897
 898                 class Disable : PragmaCmd
 899                 {
 900                         int code;
 901                         public Disable (int line, int code)
 902                                 : base (line)
 903                         {
 904                                 this.code = code;
 905                         }
 906
 907                         public override bool IsEnabled (int code, bool previous)
 908                         {
 909                                 return this.code == code ? false : previous;
 910                         }
 911                 }
 912
 913                 class DisableAll : PragmaCmd
 914                 {
 915                         public DisableAll (int line)
 916                                 : base (line) {}
 917
 918                         public override bool IsEnabled(int code, bool previous)
 919                         {
 920                                 return false;
 921                         }
 922                 }
 923
 924                 class Enable : PragmaCmd
 925                 {
 926                         int code;
 927                         public Enable (int line, int code)
 928                                 : base (line)
 929                         {
 930                                 this.code = code;
 931                         }
 932
 933                         public override bool IsEnabled(int code, bool previous)
 934                         {
 935                                 return this.code == code ? true : previous;
 936                         }
 937                 }
 938
 939                 class EnableAll : PragmaCmd
 940                 {
 941                         public EnableAll (int line)
 942                                 : base (line) {}
 943
 944                         public override bool IsEnabled(int code, bool previous)
 945                         {
 946                                 return true;
 947                         }
 948                 }
 949
 950
 951                 ArrayList regions = new ArrayList ();
 952
 953                 public void WarningDisable (int line)
 954                 {
 955                         regions.Add (new DisableAll (line));
 956                 }
 957
 958                 public void WarningDisable (Location location, int code)
 959                 {
 960                         if (CheckWarningCode (code, location))
 961                                 regions.Add (new Disable (location.Row, code));
 962                 }
 963
 964                 public void WarningEnable (int line)
 965                 {
 966                         regions.Add (new EnableAll (line));
 967                 }
 968
 969                 public void WarningEnable (Location location, int code)
 970                 {
 971                         if (CheckWarningCode (code, location))
 972                                 regions.Add (new Enable (location.Row, code));
 973                 }
 974
 975                 public bool IsWarningEnabled (int code, int src_line)
 976                 {
 977                         bool result = true;
 978                         foreach (PragmaCmd pragma in regions) {
 979                                 if (src_line < pragma.Line)
 980                                         break;
 981
 982                                 result = pragma.IsEnabled (code, result);
 983                         }
 984                         return result;
 985                 }
 986
 987                 static bool CheckWarningCode (int code, Location loc)
 988                 {
 989                         if (Report.IsValidWarning (code))
 990                                 return true;
 991
 992                         Report.Warning (1691, 1, loc, "`{0}' is not a valid warning number", code.ToString ());
 993                         return false;
 994                 }
 995         }
 996 }