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
  16 namespace Mono.CSharp {
  17
  18         //
  19         // Errors and warnings manager
  20         //
  21         public class Report
  22         {
  23                 /// <summary>
  24                 ///   Whether warnings should be considered errors
  25                 /// </summary>
  26                 public bool WarningsAreErrors;
  27                 List<int> warnings_as_error;
  28                 List<int> warnings_only;
  29
  30                 public const int RuntimeErrorId = 10000;
  31
  32                 //
  33                 // Keeps track of the warnings that we are ignoring
  34                 //
  35                 HashSet<int> warning_ignore_table;
  36
  37                 Dictionary<int, WarningRegions> warning_regions_table;
  38
  39                 int warning_level;
  40
  41                 ReportPrinter printer;
  42
  43                 int reporting_disabled;
  44
  45                 /// <summary>
  46                 /// List of symbols related to reported error/warning. You have to fill it before error/warning is reported.
  47                 /// </summary>
  48                 List<string> extra_information = new List<string> ();
  49
  50                 //
  51                 // IF YOU ADD A NEW WARNING YOU HAVE TO ADD ITS ID HERE
  52                 //
  53                 public static readonly int[] AllWarnings = new int[] {
  54                         28, 67, 78,
  55                         105, 108, 109, 114, 162, 164, 168, 169, 183, 184, 197,
  56                         219, 251, 252, 253, 278, 282,
  57                         402, 414, 419, 420, 429, 436, 437, 440, 458, 464, 465, 467, 469, 472, 473,
  58                         612, 618, 626, 628, 642, 649, 652, 657, 658, 659, 660, 661, 665, 672, 675, 693,
  59                         728,
  60                         809, 824,
  61                         1030, 1058, 1066,
  62                         1522, 1570, 1571, 1572, 1573, 1574, 1580, 1581, 1584, 1587, 1589, 1590, 1591, 1592,
  63                         1607, 1616, 1633, 1634, 1635, 1685, 1690, 1691, 1692, 1695, 1696, 1699,
  64                         1700, 1701, 1702, 1709, 1717, 1718, 1720,
  65                         1901, 1956, 1981,
  66                         2002, 2023, 2029,
  67                         3000, 3001, 3002, 3003, 3005, 3006, 3007, 3008, 3009,
  68                         3010, 3011, 3012, 3013, 3014, 3015, 3016, 3017, 3018, 3019,
  69                         3021, 3022, 3023, 3024, 3026, 3027
  70                 };
  71
  72                 static HashSet<int> AllWarningsHashSet;
  73
  74                 public Report (ReportPrinter printer)
  75                 {
  76                         if (printer == null)
  77                                 throw new ArgumentNullException ("printer");
  78
  79                         this.printer = printer;
  80                         warning_level = 4;
  81                 }
  82
  83                 public void DisableReporting ()
  84                 {
  85                         ++reporting_disabled;
  86                 }
  87
  88                 public void EnableReporting ()
  89                 {
  90                         --reporting_disabled;
  91                 }
  92
  93                 public void FeatureIsNotAvailable (CompilerContext compiler, Location loc, string feature)
  94                 {
  95                         string version;
  96                         switch (compiler.Settings.Version) {
  97                         case LanguageVersion.ISO_1:
  98                                 version = "1.0";
  99                                 break;
 100                         case LanguageVersion.ISO_2:
 101                                 version = "2.0";
 102                                 break;
 103                         case LanguageVersion.V_3:
 104                                 version = "3.0";
 105                                 break;
 106                         default:
 107                                 throw new InternalErrorException ("Invalid feature version", compiler.Settings.Version);
 108                         }
 109
 110                         Error (1644, loc,
 111                                 "Feature `{0}' cannot be used because it is not part of the C# {1} language specification",
 112                                       feature, version);
 113                 }
 114
 115                 public void FeatureIsNotSupported (Location loc, string feature)
 116                 {
 117                         Error (1644, loc,
 118                                 "Feature `{0}' is not supported in Mono mcs1 compiler. Consider using the `gmcs' compiler instead",
 119                                 feature);
 120                 }
 121
 122                 bool IsWarningEnabled (int code, int level, Location loc)
 123                 {
 124                         if (WarningLevel < level)
 125                                 return false;
 126
 127                         if (IsWarningDisabledGlobally (code))
 128                                 return false;
 129
 130                         if (warning_regions_table == null || loc.IsNull)
 131                                 return true;
 132
 133                         WarningRegions regions;
 134                         if (!warning_regions_table.TryGetValue (loc.File, out regions))
 135                                 return true;
 136
 137                         return regions.IsWarningEnabled (code, loc.Row);
 138                 }
 139
 140                 public bool IsWarningDisabledGlobally (int code)
 141                 {
 142                         return warning_ignore_table != null && warning_ignore_table.Contains (code);
 143                 }
 144
 145                 bool IsWarningAsError (int code)
 146                 {
 147                         bool is_error = WarningsAreErrors;
 148
 149                         // Check specific list
 150                         if (warnings_as_error != null)
 151                                 is_error |= warnings_as_error.Contains (code);
 152
 153                         // Ignore excluded warnings
 154                         if (warnings_only != null && warnings_only.Contains (code))
 155                                 is_error = false;
 156
 157                         return is_error;
 158                 }
 159
 160                 public void RuntimeMissingSupport (Location loc, string feature)
 161                 {
 162                         Error (-88, loc, "Your .NET Runtime does not support `{0}'. Please use the latest Mono runtime instead.", feature);
 163                 }
 164
 165                 /// <summary>
 166                 /// In most error cases is very useful to have information about symbol that caused the error.
 167                 /// Call this method before you call Report.Error when it makes sense.
 168                 /// </summary>
 169                 public void SymbolRelatedToPreviousError (Location loc, string symbol)
 170                 {
 171                         SymbolRelatedToPreviousError (loc.ToString ());
 172                 }
 173
 174                 public void SymbolRelatedToPreviousError (MemberSpec ms)
 175                 {
 176                         if (reporting_disabled > 0 || !printer.HasRelatedSymbolSupport)
 177                                 return;
 178
 179                         var mc = ms.MemberDefinition as MemberCore;
 180                         while (ms is ElementTypeSpec) {
 181                                 ms = ((ElementTypeSpec) ms).Element;
 182                                 mc = ms.MemberDefinition as MemberCore;
 183                         }
 184
 185                         if (mc != null) {
 186                                 SymbolRelatedToPreviousError (mc);
 187                         } else {
 188                                 if (ms.DeclaringType != null)
 189                                         ms = ms.DeclaringType;
 190
 191                                 var imported_type = ms.MemberDefinition as ImportedTypeDefinition;
 192                                 if (imported_type != null) {
 193                                         var iad = imported_type.DeclaringAssembly as ImportedAssemblyDefinition;
 194                                         SymbolRelatedToPreviousError (iad.Location);
 195                                 }
 196                         }
 197                 }
 198
 199                 public void SymbolRelatedToPreviousError (MemberCore mc)
 200                 {
 201                         SymbolRelatedToPreviousError (mc.Location, mc.GetSignatureForError ());
 202                 }
 203
 204                 public void SymbolRelatedToPreviousError (string loc)
 205                 {
 206                         string msg = String.Format ("{0} (Location of the symbol related to previous ", loc);
 207                         if (extra_information.Contains (msg))
 208                                 return;
 209
 210                         extra_information.Add (msg);
 211                 }
 212
 213                 public void AddWarningAsError (string warningId)
 214                 {
 215                         int id;
 216                         try {
 217                                 id = int.Parse (warningId);
 218                         } catch {
 219                                 CheckWarningCode (warningId, Location.Null);
 220                                 return;
 221                         }
 222
 223                         if (!CheckWarningCode (id, 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                                 CheckWarningCode (warningId, Location.Null);
 239                                 return;
 240                         }
 241
 242                         if (!CheckWarningCode (id, Location.Null))
 243                                 return;
 244
 245                         if (warnings_only == null)
 246                                 warnings_only = new List<int> ();
 247
 248                         warnings_only.Add (id);
 249                 }
 250
 251                 public bool CheckWarningCode (string code, Location loc)
 252                 {
 253                         Warning (1691, 1, loc, "`{0}' is not a valid warning number", code);
 254                         return false;
 255                 }
 256
 257                 public bool CheckWarningCode (int code, Location loc)
 258                 {
 259                         if (AllWarningsHashSet == null)
 260                                 AllWarningsHashSet = new HashSet<int> (AllWarnings);
 261
 262                         if (AllWarningsHashSet.Contains (code))
 263                                 return true;
 264
 265                         return CheckWarningCode (code.ToString (), loc);
 266                 }
 267
 268                 public void ExtraInformation (Location loc, string msg)
 269                 {
 270                         extra_information.Add (String.Format ("{0} {1}", loc, msg));
 271                 }
 272
 273                 public WarningRegions RegisterWarningRegion (Location location)
 274                 {
 275                         WarningRegions regions;
 276                         if (warning_regions_table == null) {
 277                                 regions = null;
 278                                 warning_regions_table = new Dictionary<int, WarningRegions> ();
 279                         } else {
 280                                 warning_regions_table.TryGetValue (location.File, out regions);
 281                         }
 282
 283                         if (regions == null) {
 284                                 regions = new WarningRegions ();
 285                                 warning_regions_table.Add (location.File, regions);
 286                         }
 287
 288                         return regions;
 289                 }
 290
 291                 public void Warning (int code, int level, Location loc, string message)
 292                 {
 293                         if (reporting_disabled > 0)
 294                                 return;
 295
 296                         if (!IsWarningEnabled (code, level, loc))
 297                                 return;
 298
 299                         AbstractMessage msg;
 300                         if (IsWarningAsError (code)) {
 301                                 message = "Warning as Error: " + message;
 302                                 msg = new ErrorMessage (code, loc, message, extra_information);
 303                         } else {
 304                                 msg = new WarningMessage (code, loc, message, extra_information);
 305                         }
 306
 307                         extra_information.Clear ();
 308                         printer.Print (msg);
 309                 }
 310
 311                 public void Warning (int code, int level, Location loc, string format, string arg)
 312                 {
 313                         Warning (code, level, loc, String.Format (format, arg));
 314                 }
 315
 316                 public void Warning (int code, int level, Location loc, string format, string arg1, string arg2)
 317                 {
 318                         Warning (code, level, loc, String.Format (format, arg1, arg2));
 319                 }
 320
 321                 public void Warning (int code, int level, Location loc, string format, params object[] args)
 322                 {
 323                         Warning (code, level, loc, String.Format (format, args));
 324                 }
 325
 326                 public void Warning (int code, int level, string message)
 327                 {
 328                         Warning (code, level, Location.Null, message);
 329                 }
 330
 331                 public void Warning (int code, int level, string format, string arg)
 332                 {
 333                         Warning (code, level, Location.Null, format, arg);
 334                 }
 335
 336                 public void Warning (int code, int level, string format, string arg1, string arg2)
 337                 {
 338                         Warning (code, level, Location.Null, format, arg1, arg2);
 339                 }
 340
 341                 public void Warning (int code, int level, string format, params string[] args)
 342                 {
 343                         Warning (code, level, Location.Null, String.Format (format, args));
 344                 }
 345
 346                 //
 347                 // Warnings encountered so far
 348                 //
 349                 public int Warnings {
 350                         get { return printer.WarningsCount; }
 351                 }
 352
 353                 public void Error (int code, Location loc, string error)
 354                 {
 355                         if (reporting_disabled > 0)
 356                                 return;
 357
 358                         ErrorMessage msg = new ErrorMessage (code, loc, error, extra_information);
 359                         extra_information.Clear ();
 360
 361                         printer.Print (msg);
 362                 }
 363
 364                 public void Error (int code, Location loc, string format, string arg)
 365                 {
 366                         Error (code, loc, String.Format (format, arg));
 367                 }
 368
 369                 public void Error (int code, Location loc, string format, string arg1, string arg2)
 370                 {
 371                         Error (code, loc, String.Format (format, arg1, arg2));
 372                 }
 373
 374                 public void Error (int code, Location loc, string format, params string[] args)
 375                 {
 376                         Error (code, loc, String.Format (format, args));
 377                 }
 378
 379                 public void Error (int code, string error)
 380                 {
 381                         Error (code, Location.Null, error);
 382                 }
 383
 384                 public void Error (int code, string format, string arg)
 385                 {
 386                         Error (code, Location.Null, format, arg);
 387                 }
 388
 389                 public void Error (int code, string format, string arg1, string arg2)
 390                 {
 391                         Error (code, Location.Null, format, arg1, arg2);
 392                 }
 393
 394                 public void Error (int code, string format, params string[] args)
 395                 {
 396                         Error (code, Location.Null, String.Format (format, args));
 397                 }
 398
 399                 //
 400                 // Errors encountered so far
 401                 //
 402                 public int Errors {
 403                         get { return printer.ErrorsCount; }
 404                 }
 405
 406                 public bool IsDisabled {
 407                         get {
 408                                 return reporting_disabled > 0;
 409                         }
 410                 }
 411
 412                 public ReportPrinter Printer {
 413                         get { return printer; }
 414                 }
 415
 416                 public void SetIgnoreWarning (int code)
 417                 {
 418                         if (warning_ignore_table == null)
 419                                 warning_ignore_table = new HashSet<int> ();
 420
 421                         warning_ignore_table.Add (code);
 422                 }
 423
 424                 public ReportPrinter SetPrinter (ReportPrinter printer)
 425                 {
 426                         ReportPrinter old = this.printer;
 427                         this.printer = printer;
 428                         return old;
 429                 }
 430
 431                 public int WarningLevel {
 432                         get {
 433                                 return warning_level;
 434                         }
 435                         set {
 436                                 warning_level = value;
 437                         }
 438                 }
 439
 440                 [Conditional ("MCS_DEBUG")]
 441                 static public void Debug (string message, params object[] args)
 442                 {
 443                         Debug (4, message, args);
 444                 }
 445
 446                 [Conditional ("MCS_DEBUG")]
 447                 static public void Debug (int category, string message, params object[] args)
 448                 {
 449 //                      if ((category & DebugFlags) == 0)
 450 //                              return;
 451
 452                         StringBuilder sb = new StringBuilder (message);
 453
 454                         if ((args != null) && (args.Length > 0)) {
 455                                 sb.Append (": ");
 456
 457                                 bool first = true;
 458                                 foreach (object arg in args) {
 459                                         if (first)
 460                                                 first = false;
 461                                         else
 462                                                 sb.Append (", ");
 463                                         if (arg == null)
 464                                                 sb.Append ("null");
 465 //                                      else if (arg is ICollection)
 466 //                                              sb.Append (PrintCollection ((ICollection) arg));
 467                                         else
 468                                                 sb.Append (arg);
 469                                 }
 470                         }
 471
 472                         Console.WriteLine (sb.ToString ());
 473                 }
 474 /*
 475                 static public string PrintCollection (ICollection collection)
 476                 {
 477                         StringBuilder sb = new StringBuilder ();
 478
 479                         sb.Append (collection.GetType ());
 480                         sb.Append ("(");
 481
 482                         bool first = true;
 483                         foreach (object o in collection) {
 484                                 if (first)
 485                                         first = false;
 486                                 else
 487                                         sb.Append (", ");
 488                                 sb.Append (o);
 489                         }
 490
 491                         sb.Append (")");
 492                         return sb.ToString ();
 493                 }
 494 */
 495         }
 496
 497         public abstract class AbstractMessage
 498         {
 499                 readonly string[] extra_info;
 500                 protected readonly int code;
 501                 protected readonly Location location;
 502                 readonly string message;
 503
 504                 protected AbstractMessage (int code, Location loc, string msg, List<string> extraInfo)
 505                 {
 506                         this.code = code;
 507                         if (code < 0)
 508                                 this.code = 8000 - code;
 509
 510                         this.location = loc;
 511                         this.message = msg;
 512                         if (extraInfo.Count != 0) {
 513                                 this.extra_info = extraInfo.ToArray ();
 514                         }
 515                 }
 516
 517                 protected AbstractMessage (AbstractMessage aMsg)
 518                 {
 519                         this.code = aMsg.code;
 520                         this.location = aMsg.location;
 521                         this.message = aMsg.message;
 522                         this.extra_info = aMsg.extra_info;
 523                 }
 524
 525                 public int Code {
 526                         get { return code; }
 527                 }
 528
 529                 public override bool Equals (object obj)
 530                 {
 531                         AbstractMessage msg = obj as AbstractMessage;
 532                         if (msg == null)
 533                                 return false;
 534
 535                         return code == msg.code && location.Equals (msg.location) && message == msg.message;
 536                 }
 537
 538                 public override int GetHashCode ()
 539                 {
 540                         return code.GetHashCode ();
 541                 }
 542
 543                 public abstract bool IsWarning { get; }
 544
 545                 public Location Location {
 546                         get { return location; }
 547                 }
 548
 549                 public abstract string MessageType { get; }
 550
 551                 public string[] RelatedSymbols {
 552                         get { return extra_info; }
 553                 }
 554
 555                 public string Text {
 556                         get { return message; }
 557                 }
 558         }
 559
 560         sealed class WarningMessage : AbstractMessage
 561         {
 562                 public WarningMessage (int code, Location loc, string message, List<string> extra_info)
 563                         : base (code, loc, message, extra_info)
 564                 {
 565                 }
 566
 567                 public override bool IsWarning {
 568                         get { return true; }
 569                 }
 570
 571                 public override string MessageType {
 572                         get {
 573                                 return "warning";
 574                         }
 575                 }
 576         }
 577
 578         sealed class ErrorMessage : AbstractMessage
 579         {
 580                 public ErrorMessage (int code, Location loc, string message, List<string> extraInfo)
 581                         : base (code, loc, message, extraInfo)
 582                 {
 583                 }
 584
 585                 public ErrorMessage (AbstractMessage aMsg)
 586                         : base (aMsg)
 587                 {
 588                 }
 589
 590                 public override bool IsWarning {
 591                         get { return false; }
 592                 }
 593
 594                 public override string MessageType {
 595                         get {
 596                                 return "error";
 597                         }
 598                 }
 599         }
 600
 601         //
 602         // Generic base for any message writer
 603         //
 604         public abstract class ReportPrinter
 605         {
 606                 #region Properties
 607
 608                 public int FatalCounter { get; set; }
 609
 610                 public int ErrorsCount { get; protected set; }
 611
 612                 public bool ShowFullPaths { get; set; }
 613
 614                 //
 615                 // Whether to dump a stack trace on errors.
 616                 //
 617                 public bool Stacktrace { get; set; }
 618
 619                 public int WarningsCount { get; private set; }
 620
 621                 //
 622                 // When (symbols related to previous ...) can be used
 623                 //
 624                 public virtual bool HasRelatedSymbolSupport {
 625                         get { return true; }
 626                 }
 627
 628                 #endregion
 629
 630
 631                 protected virtual string FormatText (string txt)
 632                 {
 633                         return txt;
 634                 }
 635
 636                 public virtual void Print (AbstractMessage msg)
 637                 {
 638                         if (msg.IsWarning) {
 639                                 ++WarningsCount;
 640                         } else {
 641                                 ++ErrorsCount;
 642
 643                                 if (ErrorsCount == FatalCounter)
 644                                         throw new Exception (msg.Text);
 645                         }
 646                 }
 647
 648                 protected void Print (AbstractMessage msg, TextWriter output)
 649                 {
 650                         StringBuilder txt = new StringBuilder ();
 651                         if (!msg.Location.IsNull) {
 652                                 if (ShowFullPaths)
 653                                         txt.Append (msg.Location.ToStringFullName ());
 654                                 else
 655                                         txt.Append (msg.Location.ToString ());
 656
 657                                 txt.Append (" ");
 658                         }
 659
 660                         txt.AppendFormat ("{0} CS{1:0000}: {2}", msg.MessageType, msg.Code, msg.Text);
 661
 662                         if (!msg.IsWarning)
 663                                 output.WriteLine (FormatText (txt.ToString ()));
 664                         else
 665                                 output.WriteLine (txt.ToString ());
 666
 667                         if (msg.RelatedSymbols != null) {
 668                                 foreach (string s in msg.RelatedSymbols)
 669                                         output.WriteLine (s + msg.MessageType + ")");
 670                         }
 671                 }
 672
 673                 public void Reset ()
 674                 {
 675                         // HACK: Temporary hack for broken repl flow
 676                         ErrorsCount = WarningsCount = 0;
 677                 }
 678         }
 679
 680         sealed class NullReportPrinter : ReportPrinter
 681         {
 682         }
 683
 684         //
 685         // Default message recorder, it uses two types of message groups.
 686         // Common messages: messages reported in all sessions.
 687         // Merged messages: union of all messages in all sessions.
 688         //
 689         // Used by the Lambda expressions to compile the code with various
 690         // parameter values, or by attribute resolver
 691         //
 692         class SessionReportPrinter : ReportPrinter
 693         {
 694                 List<AbstractMessage> session_messages;
 695                 //
 696                 // A collection of exactly same messages reported in all sessions
 697                 //
 698                 List<AbstractMessage> common_messages;
 699
 700                 //
 701                 // A collection of unique messages reported in all sessions
 702                 //
 703                 List<AbstractMessage> merged_messages;
 704
 705                 public override void Print (AbstractMessage msg)
 706                 {
 707                         //
 708                         // This line is useful when debugging recorded messages
 709                         //
 710                         // Console.WriteLine ("RECORDING: {0}", msg.ToString ());
 711
 712                         if (session_messages == null)
 713                                 session_messages = new List<AbstractMessage> ();
 714
 715                         session_messages.Add (msg);
 716
 717                         base.Print (msg);
 718                 }
 719
 720                 public void EndSession ()
 721                 {
 722                         if (session_messages == null)
 723                                 return;
 724
 725                         //
 726                         // Handles the first session
 727                         //
 728                         if (common_messages == null) {
 729                                 common_messages = new List<AbstractMessage> (session_messages);
 730                                 merged_messages = session_messages;
 731                                 session_messages = null;
 732                                 return;
 733                         }
 734
 735                         //
 736                         // Store common messages if any
 737                         //
 738                         for (int i = 0; i < common_messages.Count; ++i) {
 739                                 AbstractMessage cmsg = common_messages[i];
 740                                 bool common_msg_found = false;
 741                                 foreach (AbstractMessage msg in session_messages) {
 742                                         if (cmsg.Equals (msg)) {
 743                                                 common_msg_found = true;
 744                                                 break;
 745                                         }
 746                                 }
 747
 748                                 if (!common_msg_found)
 749                                         common_messages.RemoveAt (i);
 750                         }
 751
 752                         //
 753                         // Merge session and previous messages
 754                         //
 755                         for (int i = 0; i < session_messages.Count; ++i) {
 756                                 AbstractMessage msg = session_messages[i];
 757                                 bool msg_found = false;
 758                                 for (int ii = 0; ii < merged_messages.Count; ++ii) {
 759                                         if (msg.Equals (merged_messages[ii])) {
 760                                                 msg_found = true;
 761                                                 break;
 762                                         }
 763                                 }
 764
 765                                 if (!msg_found)
 766                                         merged_messages.Add (msg);
 767                         }
 768                 }
 769
 770                 public bool IsEmpty {
 771                         get {
 772                                 return merged_messages == null && common_messages == null;
 773                         }
 774                 }
 775
 776                 //
 777                 // Prints collected messages, common messages have a priority
 778                 //
 779                 public bool Merge (ReportPrinter dest)
 780                 {
 781                         var messages_to_print = merged_messages;
 782                         if (common_messages != null && common_messages.Count > 0) {
 783                                 messages_to_print = common_messages;
 784                         }
 785
 786                         if (messages_to_print == null)
 787                                 return false;
 788
 789                         bool error_msg = false;
 790                         foreach (AbstractMessage msg in messages_to_print) {
 791                                 dest.Print (msg);
 792                                 error_msg |= !msg.IsWarning;
 793                         }
 794
 795                         return error_msg;
 796                 }
 797         }
 798
 799         public class StreamReportPrinter : ReportPrinter
 800         {
 801                 readonly TextWriter writer;
 802
 803                 public StreamReportPrinter (TextWriter writer)
 804                 {
 805                         this.writer = writer;
 806                 }
 807
 808                 public override void Print (AbstractMessage msg)
 809                 {
 810                         Print (msg, writer);
 811                         base.Print (msg);
 812                 }
 813         }
 814
 815         public class ConsoleReportPrinter : StreamReportPrinter
 816         {
 817                 static readonly string prefix, postfix;
 818
 819                 static ConsoleReportPrinter ()
 820                 {
 821                         string term = Environment.GetEnvironmentVariable ("TERM");
 822                         bool xterm_colors = false;
 823
 824                         switch (term){
 825                         case "xterm":
 826                         case "rxvt":
 827                         case "rxvt-unicode":
 828                                 if (Environment.GetEnvironmentVariable ("COLORTERM") != null){
 829                                         xterm_colors = true;
 830                                 }
 831                                 break;
 832
 833                         case "xterm-color":
 834                         case "xterm-256color":
 835                                 xterm_colors = true;
 836                                 break;
 837                         }
 838                         if (!xterm_colors)
 839                                 return;
 840
 841                         if (!(UnixUtils.isatty (1) && UnixUtils.isatty (2)))
 842                                 return;
 843
 844                         string config = Environment.GetEnvironmentVariable ("MCS_COLORS");
 845                         if (config == null){
 846                                 config = "errors=red";
 847                                 //config = "brightwhite,red";
 848                         }
 849
 850                         if (config == "disable")
 851                                 return;
 852
 853                         if (!config.StartsWith ("errors="))
 854                                 return;
 855
 856                         config = config.Substring (7);
 857
 858                         int p = config.IndexOf (",");
 859                         if (p == -1)
 860                                 prefix = GetForeground (config);
 861                         else
 862                                 prefix = GetBackground (config.Substring (p+1)) + GetForeground (config.Substring (0, p));
 863                         postfix = "\x001b[0m";
 864                 }
 865
 866                 public ConsoleReportPrinter ()
 867                         : base (Console.Error)
 868                 {
 869                 }
 870
 871                 public ConsoleReportPrinter (TextWriter writer)
 872                         : base (writer)
 873                 {
 874                 }
 875
 876                 static int NameToCode (string s)
 877                 {
 878                         switch (s) {
 879                         case "black":
 880                                 return 0;
 881                         case "red":
 882                                 return 1;
 883                         case "green":
 884                                 return 2;
 885                         case "yellow":
 886                                 return 3;
 887                         case "blue":
 888                                 return 4;
 889                         case "magenta":
 890                                 return 5;
 891                         case "cyan":
 892                                 return 6;
 893                         case "grey":
 894                         case "white":
 895                                 return 7;
 896                         }
 897                         return 7;
 898                 }
 899
 900                 //
 901                 // maps a color name to its xterm color code
 902                 //
 903                 static string GetForeground (string s)
 904                 {
 905                         string highcode;
 906
 907                         if (s.StartsWith ("bright")) {
 908                                 highcode = "1;";
 909                                 s = s.Substring (6);
 910                         } else
 911                                 highcode = "";
 912
 913                         return "\x001b[" + highcode + (30 + NameToCode (s)).ToString () + "m";
 914                 }
 915
 916                 static string GetBackground (string s)
 917                 {
 918                         return "\x001b[" + (40 + NameToCode (s)).ToString () + "m";
 919                 }
 920
 921                 protected override string FormatText (string txt)
 922                 {
 923                         if (prefix != null)
 924                                 return prefix + txt + postfix;
 925
 926                         return txt;
 927                 }
 928
 929                 static string FriendlyStackTrace (StackTrace t)
 930                 {
 931                         StringBuilder sb = new StringBuilder ();
 932
 933                         bool foundUserCode = false;
 934
 935                         for (int i = 0; i < t.FrameCount; i++) {
 936                                 StackFrame f = t.GetFrame (i);
 937                                 var mb = f.GetMethod ();
 938
 939                                 if (!foundUserCode && mb.ReflectedType == typeof (Report))
 940                                         continue;
 941
 942                                 foundUserCode = true;
 943
 944                                 sb.Append ("\tin ");
 945
 946                                 if (f.GetFileLineNumber () > 0)
 947                                         sb.AppendFormat ("(at {0}:{1}) ", f.GetFileName (), f.GetFileLineNumber ());
 948
 949                                 sb.AppendFormat ("{0}.{1} (", mb.ReflectedType.Name, mb.Name);
 950
 951                                 bool first = true;
 952                                 foreach (var pi in mb.GetParameters ()) {
 953                                         if (!first)
 954                                                 sb.Append (", ");
 955                                         first = false;
 956
 957                                         sb.Append (pi.ParameterType.FullName);
 958                                 }
 959                                 sb.Append (")\n");
 960                         }
 961
 962                         return sb.ToString ();
 963                 }
 964
 965                 public override void Print (AbstractMessage msg)
 966                 {
 967                         base.Print (msg);
 968
 969                         if (Stacktrace)
 970                                 Console.WriteLine (FriendlyStackTrace (new StackTrace (true)));
 971                 }
 972
 973                 public static string FriendlyStackTrace (Exception e)
 974                 {
 975                         return FriendlyStackTrace (new StackTrace (e, true));
 976                 }
 977
 978                 public static void StackTrace ()
 979                 {
 980                         Console.WriteLine (FriendlyStackTrace (new StackTrace (true)));
 981                 }
 982         }
 983
 984         class TimeReporter
 985         {
 986                 public enum TimerType
 987                 {
 988                         ParseTotal,
 989                         AssemblyBuilderSetup,
 990                         CreateTypeTotal,
 991                         ReferencesLoading,
 992                         ReferencesImporting,
 993                         PredefinedTypesInit,
 994                         ModuleDefinitionTotal,
 995                         UsingResolve,
 996                         EmitTotal,
 997                         CloseTypes,
 998                         Resouces,
 999                         OutputSave,
1000                         DebugSave,
1001                 }
1002
1003                 readonly Stopwatch[] timers;
1004                 Stopwatch total;
1005
1006                 public TimeReporter (bool enabled)
1007                 {
1008                         if (!enabled)
1009                                 return;
1010
1011                         timers = new Stopwatch[System.Enum.GetValues(typeof (TimerType)).Length];
1012                 }
1013
1014                 public void Start (TimerType type)
1015                 {
1016                         if (timers != null) {
1017                                 var sw = new Stopwatch ();
1018                                 timers[(int) type] = sw;
1019                                 sw.Start ();
1020                         }
1021                 }
1022
1023                 public void StartTotal ()
1024                 {
1025                         total = new Stopwatch ();
1026                         total.Start ();
1027                 }
1028
1029                 public void Stop (TimerType type)
1030                 {
1031                         if (timers != null) {
1032                                 timers[(int) type].Stop ();
1033                         }
1034                 }
1035
1036                 public void StopTotal ()
1037                 {
1038                         total.Stop ();
1039                 }
1040
1041                 public void ShowStats ()
1042                 {
1043                         if (timers == null)
1044                                 return;
1045
1046                         Dictionary<TimerType, string> timer_names = new Dictionary<TimerType,string> () {
1047                                 { TimerType.ParseTotal, "Parsing source files" },
1048                                 { TimerType.AssemblyBuilderSetup, "Assembly builder setup" },
1049                                 { TimerType.CreateTypeTotal, "Compiled types created" },
1050                                 { TimerType.ReferencesLoading, "Referenced assemblies loading" },
1051                                 { TimerType.ReferencesImporting, "Referenced assemblies importing" },
1052                                 { TimerType.PredefinedTypesInit, "Predefined types initialization" },
1053                                 { TimerType.ModuleDefinitionTotal, "Module definition" },
1054                                 { TimerType.UsingResolve, "Top-level usings resolve" },
1055                                 { TimerType.EmitTotal, "Resolving and emitting members blocks" },
1056                                 { TimerType.CloseTypes, "Module types closed" },
1057                                 { TimerType.Resouces, "Embedding resources" },
1058                                 { TimerType.OutputSave, "Writing output file" },
1059                                 { TimerType.DebugSave, "Writing debug symbols file" },
1060                         };
1061
1062                         int counter = 0;
1063                         double percentage = (double) total.ElapsedMilliseconds / 100;
1064                         long subtotal = total.ElapsedMilliseconds;
1065                         foreach (var timer in timers) {
1066                                 string msg = timer_names[(TimerType) counter++];
1067                                 var ms = timer == null ? 0 : timer.ElapsedMilliseconds;
1068                                 Console.WriteLine ("{0,4:0.0}% {1,5}ms {2}", ms / percentage, ms, msg);
1069                                 subtotal -= ms;
1070                         }
1071
1072                         Console.WriteLine ("{0,4:0.0}% {1,5}ms Other tasks", subtotal / percentage, subtotal);
1073                         Console.WriteLine ();
1074                         Console.WriteLine ("Total elapsed time: {0}", total.Elapsed);
1075                 }
1076         }
1077
1078         public class InternalErrorException : Exception {
1079                 public InternalErrorException (MemberCore mc, Exception e)
1080                         : base (mc.Location + " " + mc.GetSignatureForError (), e)
1081                 {
1082                 }
1083
1084                 public InternalErrorException ()
1085                         : base ("Internal error")
1086                 {
1087                 }
1088
1089                 public InternalErrorException (string message)
1090                         : base (message)
1091                 {
1092                 }
1093
1094                 public InternalErrorException (string message, params object[] args)
1095                         : base (String.Format (message, args))
1096                 {
1097                 }
1098
1099                 public InternalErrorException (Exception exception, string message, params object[] args)
1100                         : base (String.Format (message, args), exception)
1101                 {
1102                 }
1103
1104                 public InternalErrorException (Exception e, Location loc)
1105                         : base (loc.ToString (), e)
1106                 {
1107                 }
1108         }
1109
1110         /// <summary>
1111         /// Handles #pragma warning
1112         /// </summary>
1113         public class WarningRegions {
1114
1115                 abstract class PragmaCmd
1116                 {
1117                         public int Line;
1118
1119                         protected PragmaCmd (int line)
1120                         {
1121                                 Line = line;
1122                         }
1123
1124                         public abstract bool IsEnabled (int code, bool previous);
1125                 }
1126
1127                 class Disable : PragmaCmd
1128                 {
1129                         int code;
1130                         public Disable (int line, int code)
1131                                 : base (line)
1132                         {
1133                                 this.code = code;
1134                         }
1135
1136                         public override bool IsEnabled (int code, bool previous)
1137                         {
1138                                 return this.code == code ? false : previous;
1139                         }
1140                 }
1141
1142                 class DisableAll : PragmaCmd
1143                 {
1144                         public DisableAll (int line)
1145                                 : base (line) {}
1146
1147                         public override bool IsEnabled(int code, bool previous)
1148                         {
1149                                 return false;
1150                         }
1151                 }
1152
1153                 class Enable : PragmaCmd
1154                 {
1155                         int code;
1156                         public Enable (int line, int code)
1157                                 : base (line)
1158                         {
1159                                 this.code = code;
1160                         }
1161
1162                         public override bool IsEnabled(int code, bool previous)
1163                         {
1164                                 return this.code == code ? true : previous;
1165                         }
1166                 }
1167
1168                 class EnableAll : PragmaCmd
1169                 {
1170                         public EnableAll (int line)
1171                                 : base (line) {}
1172
1173                         public override bool IsEnabled(int code, bool previous)
1174                         {
1175                                 return true;
1176                         }
1177                 }
1178
1179
1180                 List<PragmaCmd> regions = new List<PragmaCmd> ();
1181
1182                 public void WarningDisable (int line)
1183                 {
1184                         regions.Add (new DisableAll (line));
1185                 }
1186
1187                 public void WarningDisable (Location location, int code, Report Report)
1188                 {
1189                         if (Report.CheckWarningCode (code, location))
1190                                 regions.Add (new Disable (location.Row, code));
1191                 }
1192
1193                 public void WarningEnable (int line)
1194                 {
1195                         regions.Add (new EnableAll (line));
1196                 }
1197
1198                 public void WarningEnable (Location location, int code, Report Report)
1199                 {
1200                         if (!Report.CheckWarningCode (code, location))
1201                                 return;
1202
1203                         if (Report.IsWarningDisabledGlobally (code))
1204                                 Report.Warning (1635, 1, location, "Cannot restore warning `CS{0:0000}' because it was disabled globally", code);
1205
1206                         regions.Add (new Enable (location.Row, code));
1207                 }
1208
1209                 public bool IsWarningEnabled (int code, int src_line)
1210                 {
1211                         bool result = true;
1212                         foreach (PragmaCmd pragma in regions) {
1213                                 if (src_line < pragma.Line)
1214                                         break;
1215
1216                                 result = pragma.IsEnabled (code, result);
1217                         }
1218                         return result;
1219                 }
1220         }
1221 }