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