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 // Copyright 2001 Ximian, Inc. (http://www.ximian.com)
   8 //
   9
  10 using System;
  11 using System.IO;
  12 using System.Text;
  13 using System.Collections.Generic;
  14 using System.Diagnostics;
  15 using System.Reflection;
  16
  17 namespace Mono.CSharp {
  18
  19         //
  20         // Errors and warnings manager
  21         //
  22         public class Report
  23         {
  24                 /// <summary>
  25                 ///   Whether warnings should be considered errors
  26                 /// </summary>
  27                 public bool WarningsAreErrors;
  28                 List<int> warnings_as_error;
  29                 List<int> warnings_only;
  30
  31                 public static int DebugFlags = 0;
  32
  33                 public const int RuntimeErrorId = 10000;
  34
  35                 //
  36                 // Keeps track of the warnings that we are ignoring
  37                 //
  38                 HashSet<int> warning_ignore_table;
  39
  40                 Dictionary<int, WarningRegions> warning_regions_table;
  41
  42                 int warning_level;
  43
  44                 ReportPrinter printer;
  45
  46                 int reporting_disabled;
  47
  48                 /// <summary>
  49                 /// List of symbols related to reported error/warning. You have to fill it before error/warning is reported.
  50                 /// </summary>
  51                 List<string> extra_information = new List<string> ();
  52
  53                 //
  54                 // IF YOU ADD A NEW WARNING YOU HAVE TO ADD ITS ID HERE
  55                 //
  56                 public static readonly int[] AllWarnings = new int[] {
  57                         28, 67, 78,
  58                         105, 108, 109, 114, 162, 164, 168, 169, 183, 184, 197,
  59                         219, 251, 252, 253, 278, 282,
  60                         402, 414, 419, 420, 429, 436, 440, 458, 464, 465, 467, 469, 472,
  61                         612, 618, 626, 628, 642, 649, 652, 658, 659, 660, 661, 665, 672, 675, 693,
  62                         728,
  63                         809,
  64                         1030, 1058, 1066,
  65                         1522, 1570, 1571, 1572, 1573, 1574, 1580, 1581, 1584, 1587, 1589, 1590, 1591, 1592,
  66                         1616, 1633, 1634, 1635, 1685, 1690, 1691, 1692, 1695, 1696, 1699,
  67                         1700, 1709, 1717, 1718, 1720,
  68                         1901, 1981,
  69                         2002, 2023, 2029,
  70                         3000, 3001, 3002, 3003, 3005, 3006, 3007, 3008, 3009,
  71                         3010, 3011, 3012, 3013, 3014, 3015, 3016, 3017, 3018, 3019,
  72                         3021, 3022, 3023, 3024, 3026, 3027
  73                 };
  74
  75                 static HashSet<int> AllWarningsHashSet;
  76
  77                 public Report (ReportPrinter printer)
  78                 {
  79                         if (printer == null)
  80                                 throw new ArgumentNullException ("printer");
  81
  82                         this.printer = printer;
  83                         warning_level = 4;
  84                 }
  85
  86                 public void DisableReporting ()
  87                 {
  88                         ++reporting_disabled;
  89                 }
  90
  91                 public void EnableReporting ()
  92                 {
  93                         --reporting_disabled;
  94                 }
  95
  96                 public void FeatureIsNotAvailable (Location loc, string feature)
  97                 {
  98                         string version;
  99                         switch (RootContext.Version) {
 100                         case LanguageVersion.ISO_1:
 101                                 version = "1.0";
 102                                 break;
 103                         case LanguageVersion.ISO_2:
 104                                 version = "2.0";
 105                                 break;
 106                         case LanguageVersion.V_3:
 107                                 version = "3.0";
 108                                 break;
 109                         default:
 110                                 throw new InternalErrorException ("Invalid feature version", RootContext.Version);
 111                         }
 112
 113                         Error (1644, loc,
 114                                 "Feature `{0}' cannot be used because it is not part of the C# {1} language specification",
 115                                       feature, version);
 116                 }
 117
 118                 public void FeatureIsNotSupported (Location loc, string feature)
 119                 {
 120                         Error (1644, loc,
 121                                 "Feature `{0}' is not supported in Mono mcs1 compiler. Consider using the `gmcs' compiler instead",
 122                                 feature);
 123                 }
 124
 125                 bool IsWarningEnabled (int code, int level, Location loc)
 126                 {
 127                         if (WarningLevel < level)
 128                                 return false;
 129
 130                         if (IsWarningDisabledGlobally (code))
 131                                 return false;
 132
 133                         if (warning_regions_table == null || loc.IsNull)
 134                                 return true;
 135
 136                         WarningRegions regions;
 137                         if (!warning_regions_table.TryGetValue (loc.File, out regions))
 138                                 return true;
 139
 140                         return regions.IsWarningEnabled (code, loc.Row);
 141                 }
 142
 143                 public bool IsWarningDisabledGlobally (int code)
 144                 {
 145                         return warning_ignore_table != null && warning_ignore_table.Contains (code);
 146                 }
 147
 148                 bool IsWarningAsError (int code)
 149                 {
 150                         bool is_error = WarningsAreErrors;
 151
 152                         // Check specific list
 153                         if (warnings_as_error != null)
 154                                 is_error |= warnings_as_error.Contains (code);
 155
 156                         // Ignore excluded warnings
 157                         if (warnings_only != null && warnings_only.Contains (code))
 158                                 is_error = false;
 159
 160                         return is_error;
 161                 }
 162
 163                 public void RuntimeMissingSupport (Location loc, string feature)
 164                 {
 165                         Error (-88, loc, "Your .NET Runtime does not support `{0}'. Please use the latest Mono runtime instead.", feature);
 166                 }
 167
 168                 /// <summary>
 169                 /// In most error cases is very useful to have information about symbol that caused the error.
 170                 /// Call this method before you call Report.Error when it makes sense.
 171                 /// </summary>
 172                 public void SymbolRelatedToPreviousError (Location loc, string symbol)
 173                 {
 174                         SymbolRelatedToPreviousError (loc.ToString (), symbol);
 175                 }
 176
 177                 public void SymbolRelatedToPreviousError (MemberSpec ms)
 178                 {
 179                         if (reporting_disabled > 0 || !printer.HasRelatedSymbolSupport)
 180                                 return;
 181
 182                         var mc = ms.MemberDefinition as MemberCore;
 183                         while (ms is ElementTypeSpec) {
 184                                 ms = ((ElementTypeSpec) ms).Element;
 185                                 mc = ms.MemberDefinition as MemberCore;
 186                         }
 187
 188                         if (mc != null) {
 189                                 SymbolRelatedToPreviousError (mc);
 190                         } else if (ms.MemberDefinition != null) {
 191                                 SymbolRelatedToPreviousError (ms.MemberDefinition.Assembly.Location, "");
 192                         }
 193                 }
 194
 195                 public void SymbolRelatedToPreviousError (MemberCore mc)
 196                 {
 197                         SymbolRelatedToPreviousError (mc.Location, mc.GetSignatureForError ());
 198                 }
 199
 200                 void SymbolRelatedToPreviousError (string loc, string symbol)
 201                 {
 202                         string msg = String.Format ("{0} (Location of the symbol related to previous ", loc);
 203                         if (extra_information.Contains (msg))
 204                                 return;
 205
 206                         extra_information.Add (msg);
 207                 }
 208
 209                 public void AddWarningAsError (string warningId)
 210                 {
 211                         int id;
 212                         try {
 213                                 id = int.Parse (warningId);
 214                         } catch {
 215                                 CheckWarningCode (warningId, Location.Null);
 216                                 return;
 217                         }
 218
 219                         if (!CheckWarningCode (id, Location.Null))
 220                                 return;
 221
 222                         if (warnings_as_error == null)
 223                                 warnings_as_error = new List<int> ();
 224
 225                         warnings_as_error.Add (id);
 226                 }
 227
 228                 public void RemoveWarningAsError (string warningId)
 229                 {
 230                         int id;
 231                         try {
 232                                 id = int.Parse (warningId);
 233                         } catch {
 234                                 CheckWarningCode (warningId, Location.Null);
 235                                 return;
 236                         }
 237
 238                         if (!CheckWarningCode (id, Location.Null))
 239                                 return;
 240
 241                         if (warnings_only == null)
 242                                 warnings_only = new List<int> ();
 243
 244                         warnings_only.Add (id);
 245                 }
 246
 247                 public bool CheckWarningCode (string code, Location loc)
 248                 {
 249                         Warning (1691, 1, loc, "`{0}' is not a valid warning number", code);
 250                         return false;
 251                 }
 252
 253                 public bool CheckWarningCode (int code, Location loc)
 254                 {
 255                         if (AllWarningsHashSet == null)
 256                                 AllWarningsHashSet = new HashSet<int> (AllWarnings);
 257
 258                         if (AllWarningsHashSet.Contains (code))
 259                                 return true;
 260
 261                         return CheckWarningCode (code.ToString (), loc);
 262                 }
 263
 264                 public void ExtraInformation (Location loc, string msg)
 265                 {
 266                         extra_information.Add (String.Format ("{0} {1}", loc, msg));
 267                 }
 268
 269                 public WarningRegions RegisterWarningRegion (Location location)
 270                 {
 271                         WarningRegions regions;
 272                         if (warning_regions_table == null) {
 273                                 regions = null;
 274                                 warning_regions_table = new Dictionary<int, WarningRegions> ();
 275                         } else {
 276                                 warning_regions_table.TryGetValue (location.File, out regions);
 277                         }
 278
 279                         if (regions == null) {
 280                                 regions = new WarningRegions ();
 281                                 warning_regions_table.Add (location.File, regions);
 282                         }
 283
 284                         return regions;
 285                 }
 286
 287                 public void Warning (int code, int level, Location loc, string message)
 288                 {
 289                         if (reporting_disabled > 0)
 290                                 return;
 291
 292                         if (!IsWarningEnabled (code, level, loc))
 293                                 return;
 294
 295                         AbstractMessage msg;
 296                         if (IsWarningAsError (code))
 297                                 msg = new ErrorMessage (code, loc, message, extra_information);
 298                         else
 299                                 msg = new WarningMessage (code, loc, message, extra_information);
 300
 301                         extra_information.Clear ();
 302                         printer.Print (msg);
 303                 }
 304
 305                 public void Warning (int code, int level, Location loc, string format, string arg)
 306                 {
 307                         Warning (code, level, loc, String.Format (format, arg));
 308                 }
 309
 310                 public void Warning (int code, int level, Location loc, string format, string arg1, string arg2)
 311                 {
 312                         Warning (code, level, loc, String.Format (format, arg1, arg2));
 313                 }
 314
 315                 public void Warning (int code, int level, Location loc, string format, params object[] args)
 316                 {
 317                         Warning (code, level, loc, String.Format (format, args));
 318                 }
 319
 320                 public void Warning (int code, int level, string message)
 321                 {
 322                         Warning (code, level, Location.Null, message);
 323                 }
 324
 325                 public void Warning (int code, int level, string format, string arg)
 326                 {
 327                         Warning (code, level, Location.Null, format, arg);
 328                 }
 329
 330                 public void Warning (int code, int level, string format, string arg1, string arg2)
 331                 {
 332                         Warning (code, level, Location.Null, format, arg1, arg2);
 333                 }
 334
 335                 public void Warning (int code, int level, string format, params string[] args)
 336                 {
 337                         Warning (code, level, Location.Null, String.Format (format, args));
 338                 }
 339
 340                 //
 341                 // Warnings encountered so far
 342                 //
 343                 public int Warnings {
 344                         get { return printer.WarningsCount; }
 345                 }
 346
 347                 public void Error (int code, Location loc, string error)
 348                 {
 349                         if (reporting_disabled > 0)
 350                                 return;
 351
 352                         ErrorMessage msg = new ErrorMessage (code, loc, error, extra_information);
 353                         extra_information.Clear ();
 354
 355                         printer.Print (msg);
 356                 }
 357
 358                 public void Error (int code, Location loc, string format, string arg)
 359                 {
 360                         Error (code, loc, String.Format (format, arg));
 361                 }
 362
 363                 public void Error (int code, Location loc, string format, string arg1, string arg2)
 364                 {
 365                         Error (code, loc, String.Format (format, arg1, arg2));
 366                 }
 367
 368                 public void Error (int code, Location loc, string format, params string[] args)
 369                 {
 370                         Error (code, loc, String.Format (format, args));
 371                 }
 372
 373                 public void Error (int code, string error)
 374                 {
 375                         Error (code, Location.Null, error);
 376                 }
 377
 378                 public void Error (int code, string format, string arg)
 379                 {
 380                         Error (code, Location.Null, format, arg);
 381                 }
 382
 383                 public void Error (int code, string format, string arg1, string arg2)
 384                 {
 385                         Error (code, Location.Null, format, arg1, arg2);
 386                 }
 387
 388                 public void Error (int code, string format, params string[] args)
 389                 {
 390                         Error (code, Location.Null, String.Format (format, args));
 391                 }
 392
 393                 //
 394                 // Errors encountered so far
 395                 //
 396                 public int Errors {
 397                         get { return printer.ErrorsCount; }
 398                 }
 399
 400                 public bool IsDisabled {
 401                         get {
 402                                 return reporting_disabled > 0;
 403                         }
 404                 }
 405
 406                 public ReportPrinter Printer {
 407                         get { return printer; }
 408                 }
 409
 410                 public void SetIgnoreWarning (int code)
 411                 {
 412                         if (warning_ignore_table == null)
 413                                 warning_ignore_table = new HashSet<int> ();
 414
 415                         warning_ignore_table.Add (code);
 416                 }
 417
 418                 public ReportPrinter SetPrinter (ReportPrinter printer)
 419                 {
 420                         ReportPrinter old = this.printer;
 421                         this.printer = printer;
 422                         return old;
 423                 }
 424
 425                 public int WarningLevel {
 426                         get {
 427                                 return warning_level;
 428                         }
 429                         set {
 430                                 warning_level = value;
 431                         }
 432                 }
 433
 434                 [Conditional ("MCS_DEBUG")]
 435                 static public void Debug (string message, params object[] args)
 436                 {
 437                         Debug (4, message, args);
 438                 }
 439
 440                 [Conditional ("MCS_DEBUG")]
 441                 static public void Debug (int category, string message, params object[] args)
 442                 {
 443                         if ((category & DebugFlags) == 0)
 444                                 return;
 445
 446                         StringBuilder sb = new StringBuilder (message);
 447
 448                         if ((args != null) && (args.Length > 0)) {
 449                                 sb.Append (": ");
 450
 451                                 bool first = true;
 452                                 foreach (object arg in args) {
 453                                         if (first)
 454                                                 first = false;
 455                                         else
 456                                                 sb.Append (", ");
 457                                         if (arg == null)
 458                                                 sb.Append ("null");
 459 //                                      else if (arg is ICollection)
 460 //                                              sb.Append (PrintCollection ((ICollection) arg));
 461                                         else
 462                                                 sb.Append (arg);
 463                                 }
 464                         }
 465
 466                         Console.WriteLine (sb.ToString ());
 467                 }
 468 /*
 469                 static public string PrintCollection (ICollection collection)
 470                 {
 471                         StringBuilder sb = new StringBuilder ();
 472
 473                         sb.Append (collection.GetType ());
 474                         sb.Append ("(");
 475
 476                         bool first = true;
 477                         foreach (object o in collection) {
 478                                 if (first)
 479                                         first = false;
 480                                 else
 481                                         sb.Append (", ");
 482                                 sb.Append (o);
 483                         }
 484
 485                         sb.Append (")");
 486                         return sb.ToString ();
 487                 }
 488 */
 489         }
 490
 491         public abstract class AbstractMessage
 492         {
 493                 readonly string[] extra_info;
 494                 protected readonly int code;
 495                 protected readonly Location location;
 496                 readonly string message;
 497
 498                 protected AbstractMessage (int code, Location loc, string msg, List<string> extraInfo)
 499                 {
 500                         this.code = code;
 501                         if (code < 0)
 502                                 this.code = 8000 - code;
 503
 504                         this.location = loc;
 505                         this.message = msg;
 506                         if (extraInfo.Count != 0) {
 507                                 this.extra_info = extraInfo.ToArray ();
 508                         }
 509                 }
 510
 511                 protected AbstractMessage (AbstractMessage aMsg)
 512                 {
 513                         this.code = aMsg.code;
 514                         this.location = aMsg.location;
 515                         this.message = aMsg.message;
 516                         this.extra_info = aMsg.extra_info;
 517                 }
 518
 519                 public int Code {
 520                         get { return code; }
 521                 }
 522
 523                 public override bool Equals (object obj)
 524                 {
 525                         AbstractMessage msg = obj as AbstractMessage;
 526                         if (msg == null)
 527                                 return false;
 528
 529                         return code == msg.code && location.Equals (msg.location) && message == msg.message;
 530                 }
 531
 532                 public override int GetHashCode ()
 533                 {
 534                         return code.GetHashCode ();
 535                 }
 536
 537                 public abstract bool IsWarning { get; }
 538
 539                 public Location Location {
 540                         get { return location; }
 541                 }
 542
 543                 public abstract string MessageType { get; }
 544
 545                 public string[] RelatedSymbols {
 546                         get { return extra_info; }
 547                 }
 548
 549                 public string Text {
 550                         get { return message; }
 551                 }
 552         }
 553
 554         sealed class WarningMessage : AbstractMessage
 555         {
 556                 public WarningMessage (int code, Location loc, string message, List<string> extra_info)
 557                         : base (code, loc, message, extra_info)
 558                 {
 559                 }
 560
 561                 public override bool IsWarning {
 562                         get { return true; }
 563                 }
 564
 565                 public override string MessageType {
 566                         get {
 567                                 return "warning";
 568                         }
 569                 }
 570         }
 571
 572         sealed class ErrorMessage : AbstractMessage
 573         {
 574                 public ErrorMessage (int code, Location loc, string message, List<string> extraInfo)
 575                         : base (code, loc, message, extraInfo)
 576                 {
 577                 }
 578
 579                 public ErrorMessage (AbstractMessage aMsg)
 580                         : base (aMsg)
 581                 {
 582                 }
 583
 584                 public override bool IsWarning {
 585                         get { return false; }
 586                 }
 587
 588                 public override string MessageType {
 589                         get {
 590                                 return "error";
 591                         }
 592                 }
 593         }
 594
 595         //
 596         // Generic base for any message writer
 597         //
 598         public abstract class ReportPrinter {
 599                 /// <summary>
 600                 ///   Whether to dump a stack trace on errors.
 601                 /// </summary>
 602                 public bool Stacktrace;
 603
 604                 int warnings, errors;
 605
 606                 public int WarningsCount {
 607                         get { return warnings; }
 608                 }
 609
 610                 public int ErrorsCount {
 611                         get { return errors; }
 612                 }
 613
 614                 protected virtual string FormatText (string txt)
 615                 {
 616                         return txt;
 617                 }
 618
 619                 //
 620                 // When (symbols related to previous ...) can be used
 621                 //
 622                 public virtual bool HasRelatedSymbolSupport {
 623                         get { return true; }
 624                 }
 625
 626                 public virtual void Print (AbstractMessage msg)
 627                 {
 628                         if (msg.IsWarning)
 629                                 ++warnings;
 630                         else
 631                                 ++errors;
 632                 }
 633
 634                 protected void Print (AbstractMessage msg, TextWriter output)
 635                 {
 636                         StringBuilder txt = new StringBuilder ();
 637                         if (!msg.Location.IsNull) {
 638                                 txt.Append (msg.Location.ToString ());
 639                                 txt.Append (" ");
 640                         }
 641
 642                         txt.AppendFormat ("{0} CS{1:0000}: {2}", msg.MessageType, msg.Code, msg.Text);
 643
 644                         if (!msg.IsWarning)
 645                                 output.WriteLine (FormatText (txt.ToString ()));
 646                         else
 647                                 output.WriteLine (txt.ToString ());
 648
 649                         if (msg.RelatedSymbols != null) {
 650                                 foreach (string s in msg.RelatedSymbols)
 651                                         output.WriteLine (s + msg.MessageType + ")");
 652                         }
 653                 }
 654         }
 655
 656         //
 657         // Default message recorder, it uses two types of message groups.
 658         // Common messages: messages reported in all sessions.
 659         // Merged messages: union of all messages in all sessions.
 660         //
 661         // Used by the Lambda expressions to compile the code with various
 662         // parameter values, or by attribute resolver
 663         //
 664         class SessionReportPrinter : ReportPrinter
 665         {
 666                 List<AbstractMessage> session_messages;
 667                 //
 668                 // A collection of exactly same messages reported in all sessions
 669                 //
 670                 List<AbstractMessage> common_messages;
 671
 672                 //
 673                 // A collection of unique messages reported in all sessions
 674                 //
 675                 List<AbstractMessage> merged_messages;
 676
 677                 public override void Print (AbstractMessage msg)
 678                 {
 679                         //
 680                         // This line is useful when debugging recorded messages
 681                         //
 682                         // Console.WriteLine ("RECORDING: {0}", msg.ToString ());
 683
 684                         if (session_messages == null)
 685                                 session_messages = new List<AbstractMessage> ();
 686
 687                         session_messages.Add (msg);
 688
 689                         base.Print (msg);
 690                 }
 691
 692                 public void EndSession ()
 693                 {
 694                         if (session_messages == null)
 695                                 return;
 696
 697                         //
 698                         // Handles the first session
 699                         //
 700                         if (common_messages == null) {
 701                                 common_messages = new List<AbstractMessage> (session_messages);
 702                                 merged_messages = session_messages;
 703                                 session_messages = null;
 704                                 return;
 705                         }
 706
 707                         //
 708                         // Store common messages if any
 709                         //
 710                         for (int i = 0; i < common_messages.Count; ++i) {
 711                                 AbstractMessage cmsg = common_messages[i];
 712                                 bool common_msg_found = false;
 713                                 foreach (AbstractMessage msg in session_messages) {
 714                                         if (cmsg.Equals (msg)) {
 715                                                 common_msg_found = true;
 716                                                 break;
 717                                         }
 718                                 }
 719
 720                                 if (!common_msg_found)
 721                                         common_messages.RemoveAt (i);
 722                         }
 723
 724                         //
 725                         // Merge session and previous messages
 726                         //
 727                         for (int i = 0; i < session_messages.Count; ++i) {
 728                                 AbstractMessage msg = session_messages[i];
 729                                 bool msg_found = false;
 730                                 for (int ii = 0; ii < merged_messages.Count; ++ii) {
 731                                         if (msg.Equals (merged_messages[ii])) {
 732                                                 msg_found = true;
 733                                                 break;
 734                                         }
 735                                 }
 736
 737                                 if (!msg_found)
 738                                         merged_messages.Add (msg);
 739                         }
 740                 }
 741
 742                 public bool IsEmpty {
 743                         get {
 744                                 return merged_messages == null && common_messages == null;
 745                         }
 746                 }
 747
 748                 //
 749                 // Prints collected messages, common messages have a priority
 750                 //
 751                 public bool Merge (ReportPrinter dest)
 752                 {
 753                         var messages_to_print = merged_messages;
 754                         if (common_messages != null && common_messages.Count > 0) {
 755                                 messages_to_print = common_messages;
 756                         }
 757
 758                         if (messages_to_print == null)
 759                                 return false;
 760
 761                         bool error_msg = false;
 762                         foreach (AbstractMessage msg in messages_to_print) {
 763                                 dest.Print (msg);
 764                                 error_msg |= !msg.IsWarning;
 765                         }
 766
 767                         return error_msg;
 768                 }
 769         }
 770
 771         class StreamReportPrinter : ReportPrinter
 772         {
 773                 readonly TextWriter writer;
 774
 775                 public StreamReportPrinter (TextWriter writer)
 776                 {
 777                         this.writer = writer;
 778                 }
 779
 780                 public override void Print (AbstractMessage msg)
 781                 {
 782                         Print (msg, writer);
 783                         base.Print (msg);
 784                 }
 785         }
 786
 787         class ConsoleReportPrinter : StreamReportPrinter
 788         {
 789                 static readonly string prefix, postfix;
 790
 791                 static ConsoleReportPrinter ()
 792                 {
 793                         string term = Environment.GetEnvironmentVariable ("TERM");
 794                         bool xterm_colors = false;
 795
 796                         switch (term){
 797                         case "xterm":
 798                         case "rxvt":
 799                         case "rxvt-unicode":
 800                                 if (Environment.GetEnvironmentVariable ("COLORTERM") != null){
 801                                         xterm_colors = true;
 802                                 }
 803                                 break;
 804
 805                         case "xterm-color":
 806                                 xterm_colors = true;
 807                                 break;
 808                         }
 809                         if (!xterm_colors)
 810                                 return;
 811
 812                         if (!(UnixUtils.isatty (1) && UnixUtils.isatty (2)))
 813                                 return;
 814
 815                         string config = Environment.GetEnvironmentVariable ("MCS_COLORS");
 816                         if (config == null){
 817                                 config = "errors=red";
 818                                 //config = "brightwhite,red";
 819                         }
 820
 821                         if (config == "disable")
 822                                 return;
 823
 824                         if (!config.StartsWith ("errors="))
 825                                 return;
 826
 827                         config = config.Substring (7);
 828
 829                         int p = config.IndexOf (",");
 830                         if (p == -1)
 831                                 prefix = GetForeground (config);
 832                         else
 833                                 prefix = GetBackground (config.Substring (p+1)) + GetForeground (config.Substring (0, p));
 834                         postfix = "\x001b[0m";
 835                 }
 836
 837                 public ConsoleReportPrinter ()
 838                         : base (Console.Error)
 839                 {
 840                 }
 841
 842                 public ConsoleReportPrinter (TextWriter writer)
 843                         : base (writer)
 844                 {
 845                 }
 846
 847                 public int Fatal { get; set; }
 848
 849                 static int NameToCode (string s)
 850                 {
 851                         switch (s) {
 852                         case "black":
 853                                 return 0;
 854                         case "red":
 855                                 return 1;
 856                         case "green":
 857                                 return 2;
 858                         case "yellow":
 859                                 return 3;
 860                         case "blue":
 861                                 return 4;
 862                         case "magenta":
 863                                 return 5;
 864                         case "cyan":
 865                                 return 6;
 866                         case "grey":
 867                         case "white":
 868                                 return 7;
 869                         }
 870                         return 7;
 871                 }
 872
 873                 //
 874                 // maps a color name to its xterm color code
 875                 //
 876                 static string GetForeground (string s)
 877                 {
 878                         string highcode;
 879
 880                         if (s.StartsWith ("bright")) {
 881                                 highcode = "1;";
 882                                 s = s.Substring (6);
 883                         } else
 884                                 highcode = "";
 885
 886                         return "\x001b[" + highcode + (30 + NameToCode (s)).ToString () + "m";
 887                 }
 888
 889                 static string GetBackground (string s)
 890                 {
 891                         return "\x001b[" + (40 + NameToCode (s)).ToString () + "m";
 892                 }
 893
 894                 protected override string FormatText (string txt)
 895                 {
 896                         if (prefix != null)
 897                                 return prefix + txt + postfix;
 898
 899                         return txt;
 900                 }
 901
 902                 static string FriendlyStackTrace (StackTrace t)
 903                 {
 904                         StringBuilder sb = new StringBuilder ();
 905
 906                         bool foundUserCode = false;
 907
 908                         for (int i = 0; i < t.FrameCount; i++) {
 909                                 StackFrame f = t.GetFrame (i);
 910                                 MethodBase mb = f.GetMethod ();
 911
 912                                 if (!foundUserCode && mb.ReflectedType == typeof (Report))
 913                                         continue;
 914
 915                                 foundUserCode = true;
 916
 917                                 sb.Append ("\tin ");
 918
 919                                 if (f.GetFileLineNumber () > 0)
 920                                         sb.AppendFormat ("(at {0}:{1}) ", f.GetFileName (), f.GetFileLineNumber ());
 921
 922                                 sb.AppendFormat ("{0}.{1} (", mb.ReflectedType.Name, mb.Name);
 923
 924                                 bool first = true;
 925                                 foreach (ParameterInfo pi in mb.GetParameters ()) {
 926                                         if (!first)
 927                                                 sb.Append (", ");
 928                                         first = false;
 929
 930                                         sb.Append (pi.ParameterType.FullName);
 931                                 }
 932                                 sb.Append (")\n");
 933                         }
 934
 935                         return sb.ToString ();
 936                 }
 937
 938                 int print_count;
 939                 public override void Print (AbstractMessage msg)
 940                 {
 941                         base.Print (msg);
 942
 943                         if (Stacktrace)
 944                                 Console.WriteLine (FriendlyStackTrace (new StackTrace (true)));
 945
 946                         if (++print_count == Fatal)
 947                                 throw new Exception (msg.Text);
 948                 }
 949
 950                 public static string FriendlyStackTrace (Exception e)
 951                 {
 952                         return FriendlyStackTrace (new StackTrace (e, true));
 953                 }
 954
 955                 public static void StackTrace ()
 956                 {
 957                         Console.WriteLine (FriendlyStackTrace (new StackTrace (true)));
 958                 }
 959         }
 960
 961         public enum TimerType {
 962                 FindMembers     = 0,
 963                 TcFindMembers   = 1,
 964                 MemberLookup    = 2,
 965                 CachedLookup    = 3,
 966                 CacheInit       = 4,
 967                 MiscTimer       = 5,
 968                 CountTimers     = 6
 969         }
 970
 971         public enum CounterType {
 972                 FindMembers     = 0,
 973                 MemberCache     = 1,
 974                 MiscCounter     = 2,
 975                 CountCounters   = 3
 976         }
 977
 978         public class Timer
 979         {
 980                 static DateTime[] timer_start;
 981                 static TimeSpan[] timers;
 982                 static long[] timer_counters;
 983                 static long[] counters;
 984
 985                 static Timer ()
 986                 {
 987                         timer_start = new DateTime [(int) TimerType.CountTimers];
 988                         timers = new TimeSpan [(int) TimerType.CountTimers];
 989                         timer_counters = new long [(int) TimerType.CountTimers];
 990                         counters = new long [(int) CounterType.CountCounters];
 991
 992                         for (int i = 0; i < (int) TimerType.CountTimers; i++) {
 993                                 timer_start [i] = DateTime.Now;
 994                                 timers [i] = TimeSpan.Zero;
 995                         }
 996                 }
 997
 998                 [Conditional("TIMER")]
 999                 static public void IncrementCounter (CounterType which)
1000                 {
1001                         ++counters [(int) which];
1002                 }
1003
1004                 [Conditional("TIMER")]
1005                 static public void StartTimer (TimerType which)
1006                 {
1007                         timer_start [(int) which] = DateTime.Now;
1008                 }
1009
1010                 [Conditional("TIMER")]
1011                 static public void StopTimer (TimerType which)
1012                 {
1013                         timers [(int) which] += DateTime.Now - timer_start [(int) which];
1014                         ++timer_counters [(int) which];
1015                 }
1016
1017                 [Conditional("TIMER")]
1018                 static public void ShowTimers ()
1019                 {
1020                         ShowTimer (TimerType.FindMembers, "- FindMembers timer");
1021                         ShowTimer (TimerType.TcFindMembers, "- TypeContainer.FindMembers timer");
1022                         ShowTimer (TimerType.MemberLookup, "- MemberLookup timer");
1023                         ShowTimer (TimerType.CachedLookup, "- CachedLookup timer");
1024                         ShowTimer (TimerType.CacheInit, "- Cache init");
1025                         ShowTimer (TimerType.MiscTimer, "- Misc timer");
1026
1027                         ShowCounter (CounterType.FindMembers, "- Find members");
1028                         ShowCounter (CounterType.MemberCache, "- Member cache");
1029                         ShowCounter (CounterType.MiscCounter, "- Misc counter");
1030                 }
1031
1032                 static public void ShowCounter (CounterType which, string msg)
1033                 {
1034                         Console.WriteLine ("{0} {1}", counters [(int) which], msg);
1035                 }
1036
1037                 static public void ShowTimer (TimerType which, string msg)
1038                 {
1039                         Console.WriteLine (
1040                                 "[{0:00}:{1:000}] {2} (used {3} times)",
1041                                 (int) timers [(int) which].TotalSeconds,
1042                                 timers [(int) which].Milliseconds, msg,
1043                                 timer_counters [(int) which]);
1044                 }
1045         }
1046
1047         public class InternalErrorException : Exception {
1048                 public InternalErrorException (MemberCore mc, Exception e)
1049                         : base (mc.Location + " " + mc.GetSignatureForError (), e)
1050                 {
1051                 }
1052
1053                 public InternalErrorException ()
1054                         : base ("Internal error")
1055                 {
1056                 }
1057
1058                 public InternalErrorException (string message)
1059                         : base (message)
1060                 {
1061                 }
1062
1063                 public InternalErrorException (string message, params object[] args)
1064                         : base (String.Format (message, args))
1065                 {
1066                 }
1067
1068                 public InternalErrorException (Exception exception, string message, params object[] args)
1069                         : base (String.Format (message, args), exception)
1070                 {
1071                 }
1072
1073                 public InternalErrorException (Exception e, Location loc)
1074                         : base (loc.ToString (), e)
1075                 {
1076                 }
1077         }
1078
1079         /// <summary>
1080         /// Handles #pragma warning
1081         /// </summary>
1082         public class WarningRegions {
1083
1084                 abstract class PragmaCmd
1085                 {
1086                         public int Line;
1087
1088                         protected PragmaCmd (int line)
1089                         {
1090                                 Line = line;
1091                         }
1092
1093                         public abstract bool IsEnabled (int code, bool previous);
1094                 }
1095
1096                 class Disable : PragmaCmd
1097                 {
1098                         int code;
1099                         public Disable (int line, int code)
1100                                 : base (line)
1101                         {
1102                                 this.code = code;
1103                         }
1104
1105                         public override bool IsEnabled (int code, bool previous)
1106                         {
1107                                 return this.code == code ? false : previous;
1108                         }
1109                 }
1110
1111                 class DisableAll : PragmaCmd
1112                 {
1113                         public DisableAll (int line)
1114                                 : base (line) {}
1115
1116                         public override bool IsEnabled(int code, bool previous)
1117                         {
1118                                 return false;
1119                         }
1120                 }
1121
1122                 class Enable : PragmaCmd
1123                 {
1124                         int code;
1125                         public Enable (int line, int code)
1126                                 : base (line)
1127                         {
1128                                 this.code = code;
1129                         }
1130
1131                         public override bool IsEnabled(int code, bool previous)
1132                         {
1133                                 return this.code == code ? true : previous;
1134                         }
1135                 }
1136
1137                 class EnableAll : PragmaCmd
1138                 {
1139                         public EnableAll (int line)
1140                                 : base (line) {}
1141
1142                         public override bool IsEnabled(int code, bool previous)
1143                         {
1144                                 return true;
1145                         }
1146                 }
1147
1148
1149                 List<PragmaCmd> regions = new List<PragmaCmd> ();
1150
1151                 public void WarningDisable (int line)
1152                 {
1153                         regions.Add (new DisableAll (line));
1154                 }
1155
1156                 public void WarningDisable (Location location, int code, Report Report)
1157                 {
1158                         if (Report.CheckWarningCode (code, location))
1159                                 regions.Add (new Disable (location.Row, code));
1160                 }
1161
1162                 public void WarningEnable (int line)
1163                 {
1164                         regions.Add (new EnableAll (line));
1165                 }
1166
1167                 public void WarningEnable (Location location, int code, Report Report)
1168                 {
1169                         if (!Report.CheckWarningCode (code, location))
1170                                 return;
1171
1172                         if (Report.IsWarningDisabledGlobally (code))
1173                                 Report.Warning (1635, 1, location, "Cannot restore warning `CS{0:0000}' because it was disabled globally", code);
1174
1175                         regions.Add (new Enable (location.Row, code));
1176                 }
1177
1178                 public bool IsWarningEnabled (int code, int src_line)
1179                 {
1180                         bool result = true;
1181                         foreach (PragmaCmd pragma in regions) {
1182                                 if (src_line < pragma.Line)
1183                                         break;
1184
1185                                 result = pragma.IsEnabled (code, result);
1186                         }
1187                         return result;
1188                 }
1189         }
1190 }