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@gmail.com)
   6 //
   7 // Copyright 2001 Ximian, Inc. (http://www.ximian.com)
   8 // Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
   9 //
  10
  11 using System;
  12 using System.IO;
  13 using System.Text;
  14 using System.Collections.Generic;
  15 using System.Diagnostics;
  16
  17 namespace Mono.CSharp {
  18
  19         //
  20         // Errors and warnings manager
  21         //
  22         public class Report
  23         {
  24                 public const int RuntimeErrorId = 10000;
  25
  26                 Dictionary<int, WarningRegions> warning_regions_table;
  27
  28                 ReportPrinter printer;
  29
  30                 int reporting_disabled;
  31
  32                 readonly CompilerSettings settings;
  33
  34                 /// <summary>
  35                 /// List of symbols related to reported error/warning. You have to fill it before error/warning is reported.
  36                 /// </summary>
  37                 List<string> extra_information = new List<string> ();
  38
  39                 //
  40                 // IF YOU ADD A NEW WARNING YOU HAVE TO ADD ITS ID HERE
  41                 //
  42                 public static readonly int[] AllWarnings = new int[] {
  43                         28, 67, 78,
  44                         105, 108, 109, 114, 162, 164, 168, 169, 183, 184, 197,
  45                         219, 251, 252, 253, 278, 282,
  46                         402, 414, 419, 420, 429, 436, 437, 440, 458, 464, 465, 467, 469, 472, 473,
  47                         612, 618, 626, 628, 642, 649, 652, 657, 658, 659, 660, 661, 665, 672, 675, 693,
  48                         728,
  49                         809, 824,
  50                         1030, 1058, 1060, 1066,
  51                         1522, 1570, 1571, 1572, 1573, 1574, 1580, 1581, 1584, 1587, 1589, 1590, 1591, 1592,
  52                         1607, 1616, 1633, 1634, 1635, 1685, 1690, 1691, 1692, 1695, 1696, 1697, 1699,
  53                         1700, 1701, 1702, 1709, 1711, 1717, 1718, 1720, 1735,
  54                         1901, 1956, 1981, 1998,
  55                         2002, 2023, 2029,
  56                         3000, 3001, 3002, 3003, 3005, 3006, 3007, 3008, 3009,
  57                         3010, 3011, 3012, 3013, 3014, 3015, 3016, 3017, 3018, 3019,
  58                         3021, 3022, 3023, 3024, 3026, 3027,
  59                         4014, 4024, 4025, 4026,
  60                         7035, 7080, 7081, 7082, 7095,
  61                         8009,
  62                 };
  63
  64                 static HashSet<int> AllWarningsHashSet;
  65
  66                 public Report (CompilerContext context, ReportPrinter printer)
  67                 {
  68                         if (context == null)
  69                                 throw new ArgumentNullException ("settings");
  70                         if (printer == null)
  71                                 throw new ArgumentNullException ("printer");
  72
  73                         this.settings = context.Settings;
  74                         this.printer = printer;
  75                 }
  76
  77                 public void DisableReporting ()
  78                 {
  79                         ++reporting_disabled;
  80                 }
  81
  82                 public void EnableReporting ()
  83                 {
  84                         --reporting_disabled;
  85                 }
  86
  87                 public void FeatureIsNotAvailable (CompilerContext compiler, Location loc, string feature)
  88                 {
  89                         string version;
  90                         switch (compiler.Settings.Version) {
  91                         case LanguageVersion.ISO_1:
  92                                 version = "1.0";
  93                                 break;
  94                         case LanguageVersion.ISO_2:
  95                                 version = "2.0";
  96                                 break;
  97                         case LanguageVersion.V_3:
  98                                 version = "3.0";
  99                                 break;
 100                         case LanguageVersion.V_4:
 101                                 version = "4.0";
 102                                 break;
 103                         case LanguageVersion.V_5:
 104                                 version = "5.0";
 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                 public void RuntimeMissingSupport (Location loc, string feature)
 123                 {
 124                         Error (-88, loc, "Your .NET Runtime does not support `{0}'. Please use the latest Mono runtime instead.", feature);
 125                 }
 126
 127                 /// <summary>
 128                 /// In most error cases is very useful to have information about symbol that caused the error.
 129                 /// Call this method before you call Report.Error when it makes sense.
 130                 /// </summary>
 131                 public void SymbolRelatedToPreviousError (Location loc, string symbol)
 132                 {
 133                         SymbolRelatedToPreviousError (loc.ToString ());
 134                 }
 135
 136                 public void SymbolRelatedToPreviousError (MemberSpec ms)
 137                 {
 138                         if (reporting_disabled > 0 || !printer.HasRelatedSymbolSupport)
 139                                 return;
 140
 141                         var mc = ms.MemberDefinition as MemberCore;
 142                         while (ms is ElementTypeSpec) {
 143                                 ms = ((ElementTypeSpec) ms).Element;
 144                                 mc = ms.MemberDefinition as MemberCore;
 145                         }
 146
 147                         if (mc != null) {
 148                                 SymbolRelatedToPreviousError (mc);
 149                         } else {
 150                                 if (ms.DeclaringType != null)
 151                                         ms = ms.DeclaringType;
 152
 153                                 var imported_type = ms.MemberDefinition as ImportedTypeDefinition;
 154                                 if (imported_type != null) {
 155                                         var iad = imported_type.DeclaringAssembly as ImportedAssemblyDefinition;
 156                                         SymbolRelatedToPreviousError (iad.Location);
 157                                 }
 158                         }
 159                 }
 160
 161                 public void SymbolRelatedToPreviousError (MemberCore mc)
 162                 {
 163                         SymbolRelatedToPreviousError (mc.Location, mc.GetSignatureForError ());
 164                 }
 165
 166                 public void SymbolRelatedToPreviousError (string loc)
 167                 {
 168                         string msg = String.Format ("{0} (Location of the symbol related to previous ", loc);
 169                         if (extra_information.Contains (msg))
 170                                 return;
 171
 172                         extra_information.Add (msg);
 173                 }
 174
 175                 public bool CheckWarningCode (int code, Location loc)
 176                 {
 177                         if (AllWarningsHashSet == null)
 178                                 AllWarningsHashSet = new HashSet<int> (AllWarnings);
 179
 180                         if (AllWarningsHashSet.Contains (code))
 181                                 return true;
 182
 183                         Warning (1691, 1, loc, "`{0}' is not a valid warning number", code);
 184                         return false;
 185                 }
 186
 187                 public void ExtraInformation (Location loc, string msg)
 188                 {
 189                         extra_information.Add (String.Format ("{0} {1}", loc, msg));
 190                 }
 191
 192                 public WarningRegions RegisterWarningRegion (Location location)
 193                 {
 194                         WarningRegions regions;
 195                         if (warning_regions_table == null) {
 196                                 regions = null;
 197                                 warning_regions_table = new Dictionary<int, WarningRegions> ();
 198                         } else {
 199                                 warning_regions_table.TryGetValue (location.File, out regions);
 200                         }
 201
 202                         if (regions == null) {
 203                                 regions = new WarningRegions ();
 204                                 warning_regions_table.Add (location.File, regions);
 205                         }
 206
 207                         return regions;
 208                 }
 209
 210                 public void Warning (int code, int level, Location loc, string message)
 211                 {
 212                         if (reporting_disabled > 0)
 213                                 return;
 214
 215                         if (!settings.IsWarningEnabled (code, level))
 216                                 return;
 217
 218                         if (warning_regions_table != null && !loc.IsNull) {
 219                                 WarningRegions regions;
 220                                 if (warning_regions_table.TryGetValue (loc.File, out regions) && !regions.IsWarningEnabled (code, loc.Row))
 221                                         return;
 222                         }
 223
 224                         AbstractMessage msg;
 225                         if (settings.IsWarningAsError (code)) {
 226                                 message = "Warning as Error: " + message;
 227                                 msg = new ErrorMessage (code, loc, message, extra_information);
 228                         } else {
 229                                 msg = new WarningMessage (code, loc, message, extra_information);
 230                         }
 231
 232                         extra_information.Clear ();
 233                         printer.Print (msg, settings.ShowFullPaths);
 234                 }
 235
 236                 public void Warning (int code, int level, Location loc, string format, string arg)
 237                 {
 238                         Warning (code, level, loc, String.Format (format, arg));
 239                 }
 240
 241                 public void Warning (int code, int level, Location loc, string format, string arg1, string arg2)
 242                 {
 243                         Warning (code, level, loc, String.Format (format, arg1, arg2));
 244                 }
 245
 246                 public void Warning (int code, int level, Location loc, string format, params object[] args)
 247                 {
 248                         Warning (code, level, loc, String.Format (format, args));
 249                 }
 250
 251                 public void Warning (int code, int level, string message)
 252                 {
 253                         Warning (code, level, Location.Null, message);
 254                 }
 255
 256                 public void Warning (int code, int level, string format, string arg)
 257                 {
 258                         Warning (code, level, Location.Null, format, arg);
 259                 }
 260
 261                 public void Warning (int code, int level, string format, string arg1, string arg2)
 262                 {
 263                         Warning (code, level, Location.Null, format, arg1, arg2);
 264                 }
 265
 266                 public void Warning (int code, int level, string format, params string[] args)
 267                 {
 268                         Warning (code, level, Location.Null, String.Format (format, args));
 269                 }
 270
 271                 //
 272                 // Warnings encountered so far
 273                 //
 274                 public int Warnings {
 275                         get { return printer.WarningsCount; }
 276                 }
 277
 278                 public void Error (int code, Location loc, string error)
 279                 {
 280                         if (reporting_disabled > 0)
 281                                 return;
 282
 283                         ErrorMessage msg = new ErrorMessage (code, loc, error, extra_information);
 284                         extra_information.Clear ();
 285
 286                         printer.Print (msg, settings.ShowFullPaths);
 287
 288                         if (settings.Stacktrace)
 289                                 Console.WriteLine (FriendlyStackTrace (new StackTrace (true)));
 290
 291                         if (printer.ErrorsCount == settings.FatalCounter)
 292                                 throw new FatalException (msg.Text);
 293                 }
 294
 295                 public void Error (int code, Location loc, string format, string arg)
 296                 {
 297                         Error (code, loc, String.Format (format, arg));
 298                 }
 299
 300                 public void Error (int code, Location loc, string format, string arg1, string arg2)
 301                 {
 302                         Error (code, loc, String.Format (format, arg1, arg2));
 303                 }
 304
 305                 public void Error (int code, Location loc, string format, params string[] args)
 306                 {
 307                         Error (code, loc, String.Format (format, args));
 308                 }
 309
 310                 public void Error (int code, string error)
 311                 {
 312                         Error (code, Location.Null, error);
 313                 }
 314
 315                 public void Error (int code, string format, string arg)
 316                 {
 317                         Error (code, Location.Null, format, arg);
 318                 }
 319
 320                 public void Error (int code, string format, string arg1, string arg2)
 321                 {
 322                         Error (code, Location.Null, format, arg1, arg2);
 323                 }
 324
 325                 public void Error (int code, string format, params string[] args)
 326                 {
 327                         Error (code, Location.Null, String.Format (format, args));
 328                 }
 329
 330                 //
 331                 // Errors encountered so far
 332                 //
 333                 public int Errors {
 334                         get { return printer.ErrorsCount; }
 335                 }
 336
 337                 public bool IsDisabled {
 338                         get {
 339                                 return reporting_disabled > 0;
 340                         }
 341                 }
 342
 343                 public ReportPrinter Printer {
 344                         get { return printer; }
 345                 }
 346
 347                 public ReportPrinter SetPrinter (ReportPrinter printer)
 348                 {
 349                         ReportPrinter old = this.printer;
 350                         this.printer = printer;
 351                         return old;
 352                 }
 353
 354                 [Conditional ("MCS_DEBUG")]
 355                 static public void Debug (string message, params object[] args)
 356                 {
 357                         Debug (4, message, args);
 358                 }
 359
 360                 [Conditional ("MCS_DEBUG")]
 361                 static public void Debug (int category, string message, params object[] args)
 362                 {
 363 //                      if ((category & DebugFlags) == 0)
 364 //                              return;
 365
 366                         StringBuilder sb = new StringBuilder (message);
 367
 368                         if ((args != null) && (args.Length > 0)) {
 369                                 sb.Append (": ");
 370
 371                                 bool first = true;
 372                                 foreach (object arg in args) {
 373                                         if (first)
 374                                                 first = false;
 375                                         else
 376                                                 sb.Append (", ");
 377                                         if (arg == null)
 378                                                 sb.Append ("null");
 379 //                                      else if (arg is ICollection)
 380 //                                              sb.Append (PrintCollection ((ICollection) arg));
 381                                         else
 382                                                 sb.Append (arg);
 383                                 }
 384                         }
 385
 386                         Console.WriteLine (sb.ToString ());
 387                 }
 388 /*
 389                 static public string PrintCollection (ICollection collection)
 390                 {
 391                         StringBuilder sb = new StringBuilder ();
 392
 393                         sb.Append (collection.GetType ());
 394                         sb.Append ("(");
 395
 396                         bool first = true;
 397                         foreach (object o in collection) {
 398                                 if (first)
 399                                         first = false;
 400                                 else
 401                                         sb.Append (", ");
 402                                 sb.Append (o);
 403                         }
 404
 405                         sb.Append (")");
 406                         return sb.ToString ();
 407                 }
 408 */
 409                 static string FriendlyStackTrace (StackTrace t)
 410                 {
 411                         StringBuilder sb = new StringBuilder ();
 412
 413                         bool foundUserCode = false;
 414
 415                         for (int i = 0; i < t.FrameCount; i++) {
 416                                 StackFrame f = t.GetFrame (i);
 417                                 var mb = f.GetMethod ();
 418
 419                                 if (!foundUserCode && mb.ReflectedType == typeof (Report))
 420                                         continue;
 421
 422                                 foundUserCode = true;
 423
 424                                 sb.Append ("\tin ");
 425
 426                                 if (f.GetFileLineNumber () > 0)
 427                                         sb.AppendFormat ("(at {0}:{1}) ", f.GetFileName (), f.GetFileLineNumber ());
 428
 429                                 sb.AppendFormat ("{0}.{1} (", mb.ReflectedType.Name, mb.Name);
 430
 431                                 bool first = true;
 432                                 foreach (var pi in mb.GetParameters ()) {
 433                                         if (!first)
 434                                                 sb.Append (", ");
 435                                         first = false;
 436
 437                                         sb.Append (pi.ParameterType.FullName);
 438                                 }
 439                                 sb.Append (")\n");
 440                         }
 441
 442                         return sb.ToString ();
 443                 }
 444         }
 445
 446         public abstract class AbstractMessage
 447         {
 448                 readonly string[] extra_info;
 449                 protected readonly int code;
 450                 protected readonly Location location;
 451                 readonly string message;
 452
 453                 protected AbstractMessage (int code, Location loc, string msg, List<string> extraInfo)
 454                 {
 455                         this.code = code;
 456                         if (code < 0)
 457                                 this.code = 8000 - code;
 458
 459                         this.location = loc;
 460                         this.message = msg;
 461                         if (extraInfo.Count != 0) {
 462                                 this.extra_info = extraInfo.ToArray ();
 463                         }
 464                 }
 465
 466                 protected AbstractMessage (AbstractMessage aMsg)
 467                 {
 468                         this.code = aMsg.code;
 469                         this.location = aMsg.location;
 470                         this.message = aMsg.message;
 471                         this.extra_info = aMsg.extra_info;
 472                 }
 473
 474                 public int Code {
 475                         get { return code; }
 476                 }
 477
 478                 public override bool Equals (object obj)
 479                 {
 480                         AbstractMessage msg = obj as AbstractMessage;
 481                         if (msg == null)
 482                                 return false;
 483
 484                         return code == msg.code && location.Equals (msg.location) && message == msg.message;
 485                 }
 486
 487                 public override int GetHashCode ()
 488                 {
 489                         return code.GetHashCode ();
 490                 }
 491
 492                 public abstract bool IsWarning { get; }
 493
 494                 public Location Location {
 495                         get { return location; }
 496                 }
 497
 498                 public abstract string MessageType { get; }
 499
 500                 public string[] RelatedSymbols {
 501                         get { return extra_info; }
 502                 }
 503
 504                 public string Text {
 505                         get { return message; }
 506                 }
 507         }
 508
 509         sealed class WarningMessage : AbstractMessage
 510         {
 511                 public WarningMessage (int code, Location loc, string message, List<string> extra_info)
 512                         : base (code, loc, message, extra_info)
 513                 {
 514                 }
 515
 516                 public override bool IsWarning {
 517                         get { return true; }
 518                 }
 519
 520                 public override string MessageType {
 521                         get {
 522                                 return "warning";
 523                         }
 524                 }
 525         }
 526
 527         sealed class ErrorMessage : AbstractMessage
 528         {
 529                 public ErrorMessage (int code, Location loc, string message, List<string> extraInfo)
 530                         : base (code, loc, message, extraInfo)
 531                 {
 532                 }
 533
 534                 public ErrorMessage (AbstractMessage aMsg)
 535                         : base (aMsg)
 536                 {
 537                 }
 538
 539                 public override bool IsWarning {
 540                         get { return false; }
 541                 }
 542
 543                 public override string MessageType {
 544                         get {
 545                                 return "error";
 546                         }
 547                 }
 548         }
 549
 550         //
 551         // Generic base for any message writer
 552         //
 553         public abstract class ReportPrinter
 554         {
 555                 protected HashSet<ITypeDefinition> reported_missing_definitions;
 556
 557                 #region Properties
 558
 559                 public int ErrorsCount { get; protected set; }
 560
 561                 public int WarningsCount { get; private set; }
 562
 563                 //
 564                 // When (symbols related to previous ...) can be used
 565                 //
 566                 public virtual bool HasRelatedSymbolSupport {
 567                         get { return true; }
 568                 }
 569
 570                 #endregion
 571
 572
 573                 protected virtual string FormatText (string txt)
 574                 {
 575                         return txt;
 576                 }
 577
 578                 public virtual void Print (AbstractMessage msg, bool showFullPath)
 579                 {
 580                         if (msg.IsWarning) {
 581                                 ++WarningsCount;
 582                         } else {
 583                                 ++ErrorsCount;
 584                         }
 585                 }
 586
 587                 protected void Print (AbstractMessage msg, TextWriter output, bool showFullPath)
 588                 {
 589                         StringBuilder txt = new StringBuilder ();
 590                         if (!msg.Location.IsNull) {
 591                                 if (showFullPath)
 592                                         txt.Append (msg.Location.ToStringFullName ());
 593                                 else
 594                                         txt.Append (msg.Location.ToString ());
 595
 596                                 txt.Append (" ");
 597                         }
 598
 599                         txt.AppendFormat ("{0} CS{1:0000}: {2}", msg.MessageType, msg.Code, msg.Text);
 600
 601                         if (!msg.IsWarning)
 602                                 output.WriteLine (FormatText (txt.ToString ()));
 603                         else
 604                                 output.WriteLine (txt.ToString ());
 605
 606                         if (msg.RelatedSymbols != null) {
 607                                 foreach (string s in msg.RelatedSymbols)
 608                                         output.WriteLine (s + msg.MessageType + ")");
 609                         }
 610                 }
 611
 612                 //
 613                 // Tracks reported missing types. It needs to be session specific
 614                 // because we can run in probing mode
 615                 //
 616                 public bool MissingTypeReported (ITypeDefinition typeDefinition)
 617                 {
 618                         if (reported_missing_definitions == null)
 619                                 reported_missing_definitions = new HashSet<ITypeDefinition> ();
 620
 621                         if (reported_missing_definitions.Contains (typeDefinition))
 622                                 return true;
 623
 624                         reported_missing_definitions.Add (typeDefinition);
 625                         return false;
 626                 }
 627
 628                 public void Reset ()
 629                 {
 630                         // HACK: Temporary hack for broken repl flow
 631                         ErrorsCount = WarningsCount = 0;
 632                 }
 633         }
 634
 635         sealed class NullReportPrinter : ReportPrinter
 636         {
 637         }
 638
 639         //
 640         // Default message recorder, it uses two types of message groups.
 641         // Common messages: messages reported in all sessions.
 642         // Merged messages: union of all messages in all sessions.
 643         //
 644         // Used by the Lambda expressions to compile the code with various
 645         // parameter values, or by attribute resolver
 646         //
 647         class SessionReportPrinter : ReportPrinter
 648         {
 649                 List<AbstractMessage> session_messages;
 650                 //
 651                 // A collection of exactly same messages reported in all sessions
 652                 //
 653                 List<AbstractMessage> common_messages;
 654
 655                 //
 656                 // A collection of unique messages reported in all sessions
 657                 //
 658                 List<AbstractMessage> merged_messages;
 659
 660                 bool showFullPaths;
 661
 662                 public void ClearSession ()
 663                 {
 664                         session_messages = null;
 665                 }
 666
 667                 public override void Print (AbstractMessage msg, bool showFullPath)
 668                 {
 669                         //
 670                         // This line is useful when debugging recorded messages
 671                         //
 672                         // Console.WriteLine ("RECORDING: {0}", msg.Text);
 673
 674                         if (session_messages == null)
 675                                 session_messages = new List<AbstractMessage> ();
 676
 677                         session_messages.Add (msg);
 678
 679                         this.showFullPaths = showFullPath;
 680                         base.Print (msg, showFullPath);
 681                 }
 682
 683                 public void EndSession ()
 684                 {
 685                         if (session_messages == null)
 686                                 return;
 687
 688                         //
 689                         // Handles the first session
 690                         //
 691                         if (common_messages == null) {
 692                                 common_messages = new List<AbstractMessage> (session_messages);
 693                                 merged_messages = session_messages;
 694                                 session_messages = null;
 695                                 return;
 696                         }
 697
 698                         //
 699                         // Store common messages if any
 700                         //
 701                         for (int i = 0; i < common_messages.Count; ++i) {
 702                                 AbstractMessage cmsg = common_messages[i];
 703                                 bool common_msg_found = false;
 704                                 foreach (AbstractMessage msg in session_messages) {
 705                                         if (cmsg.Equals (msg)) {
 706                                                 common_msg_found = true;
 707                                                 break;
 708                                         }
 709                                 }
 710
 711                                 if (!common_msg_found)
 712                                         common_messages.RemoveAt (i);
 713                         }
 714
 715                         //
 716                         // Merge session and previous messages
 717                         //
 718                         for (int i = 0; i < session_messages.Count; ++i) {
 719                                 AbstractMessage msg = session_messages[i];
 720                                 bool msg_found = false;
 721                                 for (int ii = 0; ii < merged_messages.Count; ++ii) {
 722                                         if (msg.Equals (merged_messages[ii])) {
 723                                                 msg_found = true;
 724                                                 break;
 725                                         }
 726                                 }
 727
 728                                 if (!msg_found)
 729                                         merged_messages.Add (msg);
 730                         }
 731                 }
 732
 733                 public bool IsEmpty {
 734                         get {
 735                                 return merged_messages == null && common_messages == null;
 736                         }
 737                 }
 738
 739                 //
 740                 // Prints collected messages, common messages have a priority
 741                 //
 742                 public bool Merge (ReportPrinter dest)
 743                 {
 744                         var messages_to_print = merged_messages;
 745                         if (common_messages != null && common_messages.Count > 0) {
 746                                 messages_to_print = common_messages;
 747                         }
 748
 749                         if (messages_to_print == null)
 750                                 return false;
 751
 752                         bool error_msg = false;
 753                         foreach (AbstractMessage msg in messages_to_print) {
 754                                 dest.Print (msg, showFullPaths);
 755                                 error_msg |= !msg.IsWarning;
 756                         }
 757
 758                         if (reported_missing_definitions != null) {
 759                                 foreach (var missing in reported_missing_definitions)
 760                                         dest.MissingTypeReported (missing);
 761                         }
 762
 763                         return error_msg;
 764                 }
 765         }
 766
 767         public class StreamReportPrinter : ReportPrinter
 768         {
 769                 readonly TextWriter writer;
 770
 771                 public StreamReportPrinter (TextWriter writer)
 772                 {
 773                         this.writer = writer;
 774                 }
 775
 776                 public override void Print (AbstractMessage msg, bool showFullPath)
 777                 {
 778                         Print (msg, writer, showFullPath);
 779                         base.Print (msg, showFullPath);
 780                 }
 781         }
 782
 783         public class ConsoleReportPrinter : StreamReportPrinter
 784         {
 785                 static readonly string prefix, postfix;
 786
 787                 static ConsoleReportPrinter ()
 788                 {
 789                         string term = Environment.GetEnvironmentVariable ("TERM");
 790                         bool xterm_colors = false;
 791
 792                         switch (term){
 793                         case "xterm":
 794                         case "rxvt":
 795                         case "rxvt-unicode":
 796                                 if (Environment.GetEnvironmentVariable ("COLORTERM") != null){
 797                                         xterm_colors = true;
 798                                 }
 799                                 break;
 800
 801                         case "xterm-color":
 802                         case "xterm-256color":
 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                 static int NameToCode (string s)
 845                 {
 846                         switch (s) {
 847                         case "black":
 848                                 return 0;
 849                         case "red":
 850                                 return 1;
 851                         case "green":
 852                                 return 2;
 853                         case "yellow":
 854                                 return 3;
 855                         case "blue":
 856                                 return 4;
 857                         case "magenta":
 858                                 return 5;
 859                         case "cyan":
 860                                 return 6;
 861                         case "grey":
 862                         case "white":
 863                                 return 7;
 864                         }
 865                         return 7;
 866                 }
 867
 868                 //
 869                 // maps a color name to its xterm color code
 870                 //
 871                 static string GetForeground (string s)
 872                 {
 873                         string highcode;
 874
 875                         if (s.StartsWith ("bright")) {
 876                                 highcode = "1;";
 877                                 s = s.Substring (6);
 878                         } else
 879                                 highcode = "";
 880
 881                         return "\x001b[" + highcode + (30 + NameToCode (s)).ToString () + "m";
 882                 }
 883
 884                 static string GetBackground (string s)
 885                 {
 886                         return "\x001b[" + (40 + NameToCode (s)).ToString () + "m";
 887                 }
 888
 889                 protected override string FormatText (string txt)
 890                 {
 891                         if (prefix != null)
 892                                 return prefix + txt + postfix;
 893
 894                         return txt;
 895                 }
 896         }
 897
 898         class TimeReporter
 899         {
 900                 public enum TimerType
 901                 {
 902                         ParseTotal,
 903                         AssemblyBuilderSetup,
 904                         CreateTypeTotal,
 905                         ReferencesLoading,
 906                         ReferencesImporting,
 907                         PredefinedTypesInit,
 908                         ModuleDefinitionTotal,
 909                         EmitTotal,
 910                         CloseTypes,
 911                         Resouces,
 912                         OutputSave,
 913                         DebugSave,
 914                 }
 915
 916                 readonly Stopwatch[] timers;
 917                 Stopwatch total;
 918
 919                 public TimeReporter (bool enabled)
 920                 {
 921                         if (!enabled)
 922                                 return;
 923
 924                         timers = new Stopwatch[System.Enum.GetValues(typeof (TimerType)).Length];
 925                 }
 926
 927                 public void Start (TimerType type)
 928                 {
 929                         if (timers != null) {
 930                                 var sw = new Stopwatch ();
 931                                 timers[(int) type] = sw;
 932                                 sw.Start ();
 933                         }
 934                 }
 935
 936                 public void StartTotal ()
 937                 {
 938                         total = new Stopwatch ();
 939                         total.Start ();
 940                 }
 941
 942                 public void Stop (TimerType type)
 943                 {
 944                         if (timers != null) {
 945                                 timers[(int) type].Stop ();
 946                         }
 947                 }
 948
 949                 public void StopTotal ()
 950                 {
 951                         total.Stop ();
 952                 }
 953
 954                 public void ShowStats ()
 955                 {
 956                         if (timers == null)
 957                                 return;
 958
 959                         Dictionary<TimerType, string> timer_names = new Dictionary<TimerType,string> {
 960                                 { TimerType.ParseTotal, "Parsing source files" },
 961                                 { TimerType.AssemblyBuilderSetup, "Assembly builder setup" },
 962                                 { TimerType.CreateTypeTotal, "Compiled types created" },
 963                                 { TimerType.ReferencesLoading, "Referenced assemblies loading" },
 964                                 { TimerType.ReferencesImporting, "Referenced assemblies importing" },
 965                                 { TimerType.PredefinedTypesInit, "Predefined types initialization" },
 966                                 { TimerType.ModuleDefinitionTotal, "Module definition" },
 967                                 { TimerType.EmitTotal, "Resolving and emitting members blocks" },
 968                                 { TimerType.CloseTypes, "Module types closed" },
 969                                 { TimerType.Resouces, "Embedding resources" },
 970                                 { TimerType.OutputSave, "Writing output file" },
 971                                 { TimerType.DebugSave, "Writing debug symbols file" },
 972                         };
 973
 974                         int counter = 0;
 975                         double percentage = (double) total.ElapsedMilliseconds / 100;
 976                         long subtotal = total.ElapsedMilliseconds;
 977                         foreach (var timer in timers) {
 978                                 string msg = timer_names[(TimerType) counter++];
 979                                 var ms = timer == null ? 0 : timer.ElapsedMilliseconds;
 980                                 Console.WriteLine ("{0,4:0.0}% {1,5}ms {2}", ms / percentage, ms, msg);
 981                                 subtotal -= ms;
 982                         }
 983
 984                         Console.WriteLine ("{0,4:0.0}% {1,5}ms Other tasks", subtotal / percentage, subtotal);
 985                         Console.WriteLine ();
 986                         Console.WriteLine ("Total elapsed time: {0}", total.Elapsed);
 987                 }
 988         }
 989
 990         public class InternalErrorException : Exception {
 991                 public InternalErrorException (MemberCore mc, Exception e)
 992                         : base (mc.Location + " " + mc.GetSignatureForError (), e)
 993                 {
 994                 }
 995
 996                 public InternalErrorException ()
 997                         : base ("Internal error")
 998                 {
 999                 }
1000
1001                 public InternalErrorException (string message)
1002                         : base (message)
1003                 {
1004                 }
1005
1006                 public InternalErrorException (string message, params object[] args)
1007                         : base (String.Format (message, args))
1008                 {
1009                 }
1010
1011                 public InternalErrorException (Exception exception, string message, params object[] args)
1012                         : base (String.Format (message, args), exception)
1013                 {
1014                 }
1015
1016                 public InternalErrorException (Exception e, Location loc)
1017                         : base (loc.ToString (), e)
1018                 {
1019                 }
1020         }
1021
1022         class FatalException : Exception
1023         {
1024                 public FatalException (string message)
1025                         : base (message)
1026                 {
1027                 }
1028         }
1029
1030         /// <summary>
1031         /// Handles #pragma warning
1032         /// </summary>
1033         public class WarningRegions {
1034
1035                 abstract class PragmaCmd
1036                 {
1037                         public int Line;
1038
1039                         protected PragmaCmd (int line)
1040                         {
1041                                 Line = line;
1042                         }
1043
1044                         public abstract bool IsEnabled (int code, bool previous);
1045                 }
1046
1047                 class Disable : PragmaCmd
1048                 {
1049                         int code;
1050                         public Disable (int line, int code)
1051                                 : base (line)
1052                         {
1053                                 this.code = code;
1054                         }
1055
1056                         public override bool IsEnabled (int code, bool previous)
1057                         {
1058                                 return this.code != code && previous;
1059                         }
1060                 }
1061
1062                 class DisableAll : PragmaCmd
1063                 {
1064                         public DisableAll (int line)
1065                                 : base (line) {}
1066
1067                         public override bool IsEnabled(int code, bool previous)
1068                         {
1069                                 return false;
1070                         }
1071                 }
1072
1073                 class Enable : PragmaCmd
1074                 {
1075                         int code;
1076                         public Enable (int line, int code)
1077                                 : base (line)
1078                         {
1079                                 this.code = code;
1080                         }
1081
1082                         public override bool IsEnabled(int code, bool previous)
1083                         {
1084                                 return this.code == code || previous;
1085                         }
1086                 }
1087
1088                 class EnableAll : PragmaCmd
1089                 {
1090                         public EnableAll (int line)
1091                                 : base (line) {}
1092
1093                         public override bool IsEnabled(int code, bool previous)
1094                         {
1095                                 return true;
1096                         }
1097                 }
1098
1099
1100                 List<PragmaCmd> regions = new List<PragmaCmd> ();
1101
1102                 public void WarningDisable (int line)
1103                 {
1104                         regions.Add (new DisableAll (line));
1105                 }
1106
1107                 public void WarningDisable (Location location, int code, Report Report)
1108                 {
1109                         if (Report.CheckWarningCode (code, location))
1110                                 regions.Add (new Disable (location.Row, code));
1111                 }
1112
1113                 public void WarningEnable (int line)
1114                 {
1115                         regions.Add (new EnableAll (line));
1116                 }
1117
1118                 public void WarningEnable (Location location, int code, CompilerContext context)
1119                 {
1120                         if (!context.Report.CheckWarningCode (code, location))
1121                                 return;
1122
1123                         if (context.Settings.IsWarningDisabledGlobally (code))
1124                                 context.Report.Warning (1635, 1, location, "Cannot restore warning `CS{0:0000}' because it was disabled globally", code);
1125
1126                         regions.Add (new Enable (location.Row, code));
1127                 }
1128
1129                 public bool IsWarningEnabled (int code, int src_line)
1130                 {
1131                         bool result = true;
1132                         foreach (PragmaCmd pragma in regions) {
1133                                 if (src_line < pragma.Line)
1134                                         break;
1135
1136                                 result = pragma.IsEnabled (code, result);
1137                         }
1138                         return result;
1139                 }
1140         }
1141 }