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 using System.Reflection.Emit;
  17
  18 namespace Mono.CSharp {
  19
  20         //
  21         // Errors and warnings manager
  22         //
  23         public class Report
  24         {
  25                 /// <summary>
  26                 ///   Whether warnings should be considered errors
  27                 /// </summary>
  28                 public bool WarningsAreErrors;
  29                 List<int> warnings_as_error;
  30                 List<int> warnings_only;
  31
  32                 public static int DebugFlags = 0;
  33
  34                 //
  35                 // Keeps track of the warnings that we are ignoring
  36                 //
  37                 public Dictionary<int, bool> warning_ignore_table;
  38
  39                 Dictionary<string, WarningRegions> warning_regions_table;
  40
  41                 int warning_level;
  42
  43                 ReportPrinter printer;
  44
  45                 int reporting_disabled;
  46
  47                 /// <summary>
  48                 /// List of symbols related to reported error/warning. You have to fill it before error/warning is reported.
  49                 /// </summary>
  50                 List<string> extra_information = new List<string> ();
  51
  52                 //
  53                 // IF YOU ADD A NEW WARNING YOU HAVE TO ADD ITS ID HERE
  54                 //
  55                 public static readonly int[] AllWarnings = new int[] {
  56                         28, 67, 78,
  57                         105, 108, 109, 114, 162, 164, 168, 169, 183, 184, 197,
  58                         219, 251, 252, 253, 278, 282,
  59                         402, 414, 419, 420, 429, 436, 440, 458, 464, 465, 467, 469, 472,
  60                         612, 618, 626, 628, 642, 649, 652, 658, 659, 660, 661, 665, 672, 675, 693,
  61                         809,
  62                         1030, 1058, 1066,
  63                         1522, 1570, 1571, 1572, 1573, 1574, 1580, 1581, 1584, 1587, 1589, 1590, 1591, 1592,
  64                         1616, 1633, 1634, 1635, 1685, 1690, 1691, 1692,
  65                         1700, 1717, 1718, 1720,
  66                         1901,
  67                         2002, 2023, 2029,
  68                         3000, 3001, 3002, 3003, 3005, 3006, 3007, 3008, 3009,
  69                         3010, 3011, 3012, 3013, 3014, 3015, 3016, 3017, 3018, 3019,
  70                         3021, 3022, 3023, 3024, 3026, 3027
  71                 };
  72
  73                 static Report ()
  74                 {
  75                         // Just to be sure that binary search is working
  76                         Array.Sort (AllWarnings);
  77                 }
  78
  79                 public Report (ReportPrinter printer)
  80                 {
  81                         if (printer == null)
  82                                 throw new ArgumentNullException ("printer");
  83
  84                         this.printer = printer;
  85                         warning_level = 4;
  86                 }
  87
  88                 public void DisableReporting ()
  89                 {
  90                         ++reporting_disabled;
  91                 }
  92
  93                 public void EnableReporting ()
  94                 {
  95                         --reporting_disabled;
  96                 }
  97
  98                 public void FeatureIsNotAvailable (Location loc, string feature)
  99                 {
 100                         string version;
 101                         switch (RootContext.Version) {
 102                         case LanguageVersion.ISO_1:
 103                                 version = "1.0";
 104                                 break;
 105                         case LanguageVersion.ISO_2:
 106                                 version = "2.0";
 107                                 break;
 108                         case LanguageVersion.V_3:
 109                                 version = "3.0";
 110                                 break;
 111                         default:
 112                                 throw new InternalErrorException ("Invalid feature version", RootContext.Version);
 113                         }
 114
 115                         Error (1644, loc,
 116                                 "Feature `{0}' cannot be used because it is not part of the C# {1} language specification",
 117                                       feature, version);
 118                 }
 119
 120                 public void FeatureIsNotSupported (Location loc, string feature)
 121                 {
 122                         Error (1644, loc,
 123                                 "Feature `{0}' is not supported in Mono mcs1 compiler. Consider using the `gmcs' compiler instead",
 124                                 feature);
 125                 }
 126
 127                 static bool IsValidWarning (int code)
 128                 {
 129                         return Array.BinarySearch (AllWarnings, code) >= 0;
 130                 }
 131
 132                 bool IsWarningEnabled (int code, int level, Location loc)
 133                 {
 134                         if (WarningLevel < level)
 135                                 return false;
 136
 137                         if (warning_ignore_table != null) {
 138                                 if (warning_ignore_table.ContainsKey (code)) {
 139                                         return false;
 140                                 }
 141                         }
 142
 143                         if (warning_regions_table == null || loc.IsNull)
 144                                 return true;
 145
 146                         WarningRegions regions;
 147                         if (!warning_regions_table.TryGetValue (loc.Name, out regions))
 148                                 return true;
 149
 150                         return regions.IsWarningEnabled (code, loc.Row);
 151                 }
 152
 153                 bool IsWarningAsError (int code)
 154                 {
 155                         bool is_error = WarningsAreErrors;
 156
 157                         // Check specific list
 158                         if (warnings_as_error != null)
 159                                 is_error |= warnings_as_error.Contains (code);
 160
 161                         // Ignore excluded warnings
 162                         if (warnings_only != null && warnings_only.Contains (code))
 163                                 is_error = false;
 164
 165                         return is_error;
 166                 }
 167
 168                 public void RuntimeMissingSupport (Location loc, string feature)
 169                 {
 170                         Error (-88, loc, "Your .NET Runtime does not support `{0}'. Please use the latest Mono runtime instead.", feature);
 171                 }
 172
 173                 /// <summary>
 174                 /// In most error cases is very useful to have information about symbol that caused the error.
 175                 /// Call this method before you call Report.Error when it makes sense.
 176                 /// </summary>
 177                 public void SymbolRelatedToPreviousError (Location loc, string symbol)
 178                 {
 179                         SymbolRelatedToPreviousError (loc.ToString (), symbol);
 180                 }
 181
 182                 public void SymbolRelatedToPreviousError (MemberSpec ms)
 183                 {
 184                         if (reporting_disabled > 0 || !printer.HasRelatedSymbolSupport)
 185                                 return;
 186
 187                         var mc = ms.MemberDefinition as MemberCore;
 188                         while (ms is ElementTypeSpec) {
 189                                 ms = ((ElementTypeSpec) ms).Element;
 190                                 mc = ms.MemberDefinition as MemberCore;
 191                         }
 192
 193                         if (mc != null) {
 194                                 SymbolRelatedToPreviousError (mc);
 195                         } else {
 196                                 SymbolRelatedToPreviousError (ms.MemberDefinition.Assembly.Location, "");
 197                         }
 198                 }
 199
 200                 public void SymbolRelatedToPreviousError (MemberCore mc)
 201                 {
 202                         SymbolRelatedToPreviousError (mc.Location, mc.GetSignatureForError ());
 203                 }
 204
 205                 void SymbolRelatedToPreviousError (string loc, string symbol)
 206                 {
 207                         string msg = String.Format ("{0} (Location of the symbol related to previous ", loc);
 208                         if (extra_information.Contains (msg))
 209                                 return;
 210
 211                         extra_information.Add (msg);
 212                 }
 213
 214                 public void AddWarningAsError (string warningId)
 215                 {
 216                         int id;
 217                         try {
 218                                 id = int.Parse (warningId);
 219                         } catch {
 220                                 id = -1;
 221                         }
 222
 223                         if (!CheckWarningCode (id, warningId, Location.Null))
 224                                 return;
 225
 226                         if (warnings_as_error == null)
 227                                 warnings_as_error = new List<int> ();
 228
 229                         warnings_as_error.Add (id);
 230                 }
 231
 232                 public void RemoveWarningAsError (string warningId)
 233                 {
 234                         int id;
 235                         try {
 236                                 id = int.Parse (warningId);
 237                         } catch {
 238                                 id = -1;
 239                         }
 240
 241                         if (!CheckWarningCode (id, warningId, Location.Null))
 242                                 return;
 243
 244                         if (warnings_only == null)
 245                                 warnings_only = new List<int> ();
 246
 247                         warnings_only.Add (id);
 248                 }
 249
 250                 public bool CheckWarningCode (int code, Location loc)
 251                 {
 252                         return CheckWarningCode (code, code.ToString (), loc);
 253                 }
 254
 255                 public bool CheckWarningCode (int code, string scode, Location loc)
 256                 {
 257                         if (IsValidWarning (code))
 258                                 return true;
 259
 260                         Warning (1691, 1, loc, "`{0}' is not a valid warning number", scode);
 261                         return false;
 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<string, WarningRegions> ();
 275                         } else {
 276                                 warning_regions_table.TryGetValue (location.Name, out regions);
 277                         }
 278
 279                         if (regions == null) {
 280                                 regions = new WarningRegions ();
 281                                 warning_regions_table.Add (location.Name, 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 Dictionary<int, bool> ();
 414
 415                         warning_ignore_table [code] = true;
 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                         foreach (AbstractMessage msg in messages_to_print)
 762                                 dest.Print (msg);
 763
 764                         return true;
 765                 }
 766         }
 767
 768         class StreamReportPrinter : ReportPrinter
 769         {
 770                 readonly TextWriter writer;
 771
 772                 public StreamReportPrinter (TextWriter writer)
 773                 {
 774                         this.writer = writer;
 775                 }
 776
 777                 public override void Print (AbstractMessage msg)
 778                 {
 779                         Print (msg, writer);
 780                         base.Print (msg);
 781                 }
 782         }
 783
 784         class ConsoleReportPrinter : StreamReportPrinter
 785         {
 786                 static readonly string prefix, postfix;
 787
 788                 static ConsoleReportPrinter ()
 789                 {
 790                         string term = Environment.GetEnvironmentVariable ("TERM");
 791                         bool xterm_colors = false;
 792
 793                         switch (term){
 794                         case "xterm":
 795                         case "rxvt":
 796                         case "rxvt-unicode":
 797                                 if (Environment.GetEnvironmentVariable ("COLORTERM") != null){
 798                                         xterm_colors = true;
 799                                 }
 800                                 break;
 801
 802                         case "xterm-color":
 803                                 xterm_colors = true;
 804                                 break;
 805                         }
 806                         if (!xterm_colors)
 807                                 return;
 808
 809                         if (!(UnixUtils.isatty (1) && UnixUtils.isatty (2)))
 810                                 return;
 811
 812                         string config = Environment.GetEnvironmentVariable ("MCS_COLORS");
 813                         if (config == null){
 814                                 config = "errors=red";
 815                                 //config = "brightwhite,red";
 816                         }
 817
 818                         if (config == "disable")
 819                                 return;
 820
 821                         if (!config.StartsWith ("errors="))
 822                                 return;
 823
 824                         config = config.Substring (7);
 825
 826                         int p = config.IndexOf (",");
 827                         if (p == -1)
 828                                 prefix = GetForeground (config);
 829                         else
 830                                 prefix = GetBackground (config.Substring (p+1)) + GetForeground (config.Substring (0, p));
 831                         postfix = "\x001b[0m";
 832                 }
 833
 834                 public ConsoleReportPrinter ()
 835                         : base (Console.Error)
 836                 {
 837                 }
 838
 839                 public ConsoleReportPrinter (TextWriter writer)
 840                         : base (writer)
 841                 {
 842                 }
 843
 844                 public int Fatal { get; set; }
 845
 846                 static int NameToCode (string s)
 847                 {
 848                         switch (s) {
 849                         case "black":
 850                                 return 0;
 851                         case "red":
 852                                 return 1;
 853                         case "green":
 854                                 return 2;
 855                         case "yellow":
 856                                 return 3;
 857                         case "blue":
 858                                 return 4;
 859                         case "magenta":
 860                                 return 5;
 861                         case "cyan":
 862                                 return 6;
 863                         case "grey":
 864                         case "white":
 865                                 return 7;
 866                         }
 867                         return 7;
 868                 }
 869
 870                 //
 871                 // maps a color name to its xterm color code
 872                 //
 873                 static string GetForeground (string s)
 874                 {
 875                         string highcode;
 876
 877                         if (s.StartsWith ("bright")) {
 878                                 highcode = "1;";
 879                                 s = s.Substring (6);
 880                         } else
 881                                 highcode = "";
 882
 883                         return "\x001b[" + highcode + (30 + NameToCode (s)).ToString () + "m";
 884                 }
 885
 886                 static string GetBackground (string s)
 887                 {
 888                         return "\x001b[" + (40 + NameToCode (s)).ToString () + "m";
 889                 }
 890
 891                 protected override string FormatText (string txt)
 892                 {
 893                         if (prefix != null)
 894                                 return prefix + txt + postfix;
 895
 896                         return txt;
 897                 }
 898
 899                 static string FriendlyStackTrace (StackTrace t)
 900                 {
 901                         StringBuilder sb = new StringBuilder ();
 902
 903                         bool foundUserCode = false;
 904
 905                         for (int i = 0; i < t.FrameCount; i++) {
 906                                 StackFrame f = t.GetFrame (i);
 907                                 MethodBase mb = f.GetMethod ();
 908
 909                                 if (!foundUserCode && mb.ReflectedType == typeof (Report))
 910                                         continue;
 911
 912                                 foundUserCode = true;
 913
 914                                 sb.Append ("\tin ");
 915
 916                                 if (f.GetFileLineNumber () > 0)
 917                                         sb.AppendFormat ("(at {0}:{1}) ", f.GetFileName (), f.GetFileLineNumber ());
 918
 919                                 sb.AppendFormat ("{0}.{1} (", mb.ReflectedType.Name, mb.Name);
 920
 921                                 bool first = true;
 922                                 foreach (ParameterInfo pi in mb.GetParameters ()) {
 923                                         if (!first)
 924                                                 sb.Append (", ");
 925                                         first = false;
 926
 927                                         sb.Append (pi.ParameterType.FullName);
 928                                 }
 929                                 sb.Append (")\n");
 930                         }
 931
 932                         return sb.ToString ();
 933                 }
 934
 935                 int print_count;
 936                 public override void Print (AbstractMessage msg)
 937                 {
 938                         base.Print (msg);
 939
 940                         if (Stacktrace)
 941                                 Console.WriteLine (FriendlyStackTrace (new StackTrace (true)));
 942
 943                         if (++print_count == Fatal)
 944                                 throw new Exception (msg.Text);
 945                 }
 946
 947                 public static string FriendlyStackTrace (Exception e)
 948                 {
 949                         return FriendlyStackTrace (new StackTrace (e, true));
 950                 }
 951
 952                 public static void StackTrace ()
 953                 {
 954                         Console.WriteLine (FriendlyStackTrace (new StackTrace (true)));
 955                 }
 956         }
 957
 958         public enum TimerType {
 959                 FindMembers     = 0,
 960                 TcFindMembers   = 1,
 961                 MemberLookup    = 2,
 962                 CachedLookup    = 3,
 963                 CacheInit       = 4,
 964                 MiscTimer       = 5,
 965                 CountTimers     = 6
 966         }
 967
 968         public enum CounterType {
 969                 FindMembers     = 0,
 970                 MemberCache     = 1,
 971                 MiscCounter     = 2,
 972                 CountCounters   = 3
 973         }
 974
 975         public class Timer
 976         {
 977                 static DateTime[] timer_start;
 978                 static TimeSpan[] timers;
 979                 static long[] timer_counters;
 980                 static long[] counters;
 981
 982                 static Timer ()
 983                 {
 984                         timer_start = new DateTime [(int) TimerType.CountTimers];
 985                         timers = new TimeSpan [(int) TimerType.CountTimers];
 986                         timer_counters = new long [(int) TimerType.CountTimers];
 987                         counters = new long [(int) CounterType.CountCounters];
 988
 989                         for (int i = 0; i < (int) TimerType.CountTimers; i++) {
 990                                 timer_start [i] = DateTime.Now;
 991                                 timers [i] = TimeSpan.Zero;
 992                         }
 993                 }
 994
 995                 [Conditional("TIMER")]
 996                 static public void IncrementCounter (CounterType which)
 997                 {
 998                         ++counters [(int) which];
 999                 }
1000
1001                 [Conditional("TIMER")]
1002                 static public void StartTimer (TimerType which)
1003                 {
1004                         timer_start [(int) which] = DateTime.Now;
1005                 }
1006
1007                 [Conditional("TIMER")]
1008                 static public void StopTimer (TimerType which)
1009                 {
1010                         timers [(int) which] += DateTime.Now - timer_start [(int) which];
1011                         ++timer_counters [(int) which];
1012                 }
1013
1014                 [Conditional("TIMER")]
1015                 static public void ShowTimers ()
1016                 {
1017                         ShowTimer (TimerType.FindMembers, "- FindMembers timer");
1018                         ShowTimer (TimerType.TcFindMembers, "- TypeContainer.FindMembers timer");
1019                         ShowTimer (TimerType.MemberLookup, "- MemberLookup timer");
1020                         ShowTimer (TimerType.CachedLookup, "- CachedLookup timer");
1021                         ShowTimer (TimerType.CacheInit, "- Cache init");
1022                         ShowTimer (TimerType.MiscTimer, "- Misc timer");
1023
1024                         ShowCounter (CounterType.FindMembers, "- Find members");
1025                         ShowCounter (CounterType.MemberCache, "- Member cache");
1026                         ShowCounter (CounterType.MiscCounter, "- Misc counter");
1027                 }
1028
1029                 static public void ShowCounter (CounterType which, string msg)
1030                 {
1031                         Console.WriteLine ("{0} {1}", counters [(int) which], msg);
1032                 }
1033
1034                 static public void ShowTimer (TimerType which, string msg)
1035                 {
1036                         Console.WriteLine (
1037                                 "[{0:00}:{1:000}] {2} (used {3} times)",
1038                                 (int) timers [(int) which].TotalSeconds,
1039                                 timers [(int) which].Milliseconds, msg,
1040                                 timer_counters [(int) which]);
1041                 }
1042         }
1043
1044         public class InternalErrorException : Exception {
1045                 public InternalErrorException (MemberCore mc, Exception e)
1046                         : base (mc.Location + " " + mc.GetSignatureForError (), e)
1047                 {
1048                 }
1049
1050                 public InternalErrorException ()
1051                         : base ("Internal error")
1052                 {
1053                 }
1054
1055                 public InternalErrorException (string message)
1056                         : base (message)
1057                 {
1058                 }
1059
1060                 public InternalErrorException (string message, params object[] args)
1061                         : base (String.Format (message, args))
1062                 {
1063                 }
1064
1065                 public InternalErrorException (Exception exception, string message, params object[] args)
1066                         : base (String.Format (message, args), exception)
1067                 {
1068                 }
1069
1070                 public InternalErrorException (Exception e, Location loc)
1071                         : base (loc.ToString (), e)
1072                 {
1073                 }
1074         }
1075
1076         /// <summary>
1077         /// Handles #pragma warning
1078         /// </summary>
1079         public class WarningRegions {
1080
1081                 abstract class PragmaCmd
1082                 {
1083                         public int Line;
1084
1085                         protected PragmaCmd (int line)
1086                         {
1087                                 Line = line;
1088                         }
1089
1090                         public abstract bool IsEnabled (int code, bool previous);
1091                 }
1092
1093                 class Disable : PragmaCmd
1094                 {
1095                         int code;
1096                         public Disable (int line, int code)
1097                                 : base (line)
1098                         {
1099                                 this.code = code;
1100                         }
1101
1102                         public override bool IsEnabled (int code, bool previous)
1103                         {
1104                                 return this.code == code ? false : previous;
1105                         }
1106                 }
1107
1108                 class DisableAll : PragmaCmd
1109                 {
1110                         public DisableAll (int line)
1111                                 : base (line) {}
1112
1113                         public override bool IsEnabled(int code, bool previous)
1114                         {
1115                                 return false;
1116                         }
1117                 }
1118
1119                 class Enable : PragmaCmd
1120                 {
1121                         int code;
1122                         public Enable (int line, int code)
1123                                 : base (line)
1124                         {
1125                                 this.code = code;
1126                         }
1127
1128                         public override bool IsEnabled(int code, bool previous)
1129                         {
1130                                 return this.code == code ? true : previous;
1131                         }
1132                 }
1133
1134                 class EnableAll : PragmaCmd
1135                 {
1136                         public EnableAll (int line)
1137                                 : base (line) {}
1138
1139                         public override bool IsEnabled(int code, bool previous)
1140                         {
1141                                 return true;
1142                         }
1143                 }
1144
1145
1146                 List<PragmaCmd> regions = new List<PragmaCmd> ();
1147
1148                 public void WarningDisable (int line)
1149                 {
1150                         regions.Add (new DisableAll (line));
1151                 }
1152
1153                 public void WarningDisable (Location location, int code, Report Report)
1154                 {
1155                         if (Report.CheckWarningCode (code, location))
1156                                 regions.Add (new Disable (location.Row, code));
1157                 }
1158
1159                 public void WarningEnable (int line)
1160                 {
1161                         regions.Add (new EnableAll (line));
1162                 }
1163
1164                 public void WarningEnable (Location location, int code, Report Report)
1165                 {
1166                         if (Report.CheckWarningCode (code, location))
1167                                 regions.Add (new Enable (location.Row, code));
1168                 }
1169
1170                 public bool IsWarningEnabled (int code, int src_line)
1171                 {
1172                         bool result = true;
1173                         foreach (PragmaCmd pragma in regions) {
1174                                 if (src_line < pragma.Line)
1175                                         break;
1176
1177                                 result = pragma.IsEnabled (code, result);
1178                         }
1179                         return result;
1180                 }
1181         }
1182 }