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, 8094
  62                 };
  63
  64                 public Report (CompilerContext context, ReportPrinter printer)
  65                 {
  66                         if (context == null)
  67                                 throw new ArgumentNullException ("context");
  68                         if (printer == null)
  69                                 throw new ArgumentNullException ("printer");
  70
  71                         this.settings = context.Settings;
  72                         this.printer = printer;
  73                 }
  74
  75                 public void DisableReporting ()
  76                 {
  77                         ++reporting_disabled;
  78                 }
  79
  80                 public void EnableReporting ()
  81                 {
  82                         --reporting_disabled;
  83                 }
  84
  85                 public void FeatureIsNotAvailable (CompilerContext compiler, Location loc, string feature)
  86                 {
  87                         string version;
  88                         switch (compiler.Settings.Version) {
  89                         case LanguageVersion.ISO_1:
  90                                 version = "1.0";
  91                                 break;
  92                         case LanguageVersion.ISO_2:
  93                                 version = "2.0";
  94                                 break;
  95                         case LanguageVersion.V_3:
  96                                 version = "3.0";
  97                                 break;
  98                         case LanguageVersion.V_4:
  99                                 version = "4.0";
 100                                 break;
 101                         case LanguageVersion.V_5:
 102                                 version = "5.0";
 103                                 break;
 104                         case LanguageVersion.V_6:
 105                                 version = "6.0";
 106                                 break;
 107                         default:
 108                                 throw new InternalErrorException ("Invalid feature version", compiler.Settings.Version);
 109                         }
 110
 111                         Error (1644, loc,
 112                                 "Feature `{0}' cannot be used because it is not part of the C# {1} language specification",
 113                                       feature, version);
 114                 }
 115
 116                 public void FeatureIsNotSupported (Location loc, string feature)
 117                 {
 118                         Error (1644, loc,
 119                                 "Feature `{0}' is not supported in Mono mcs1 compiler. Consider using the `gmcs' compiler instead",
 120                                 feature);
 121                 }
 122
 123                 public void RuntimeMissingSupport (Location loc, string feature)
 124                 {
 125                         Error (-88, loc, "Your .NET Runtime does not support `{0}'. Please use the latest Mono runtime instead.", feature);
 126                 }
 127
 128                 /// <summary>
 129                 /// In most error cases is very useful to have information about symbol that caused the error.
 130                 /// Call this method before you call Report.Error when it makes sense.
 131                 /// </summary>
 132                 public void SymbolRelatedToPreviousError (Location loc, string symbol)
 133                 {
 134                         SymbolRelatedToPreviousError (loc.ToString ());
 135                 }
 136
 137                 public void SymbolRelatedToPreviousError (MemberSpec ms)
 138                 {
 139                         if (reporting_disabled > 0 || !printer.HasRelatedSymbolSupport)
 140                                 return;
 141
 142                         var mc = ms.MemberDefinition as MemberCore;
 143                         while (ms is ElementTypeSpec) {
 144                                 ms = ((ElementTypeSpec) ms).Element;
 145                                 mc = ms.MemberDefinition as MemberCore;
 146                         }
 147
 148                         if (mc != null) {
 149                                 SymbolRelatedToPreviousError (mc);
 150                         } else {
 151                                 if (ms.DeclaringType != null)
 152                                         ms = ms.DeclaringType;
 153
 154                                 var imported_type = ms.MemberDefinition as ImportedTypeDefinition;
 155                                 if (imported_type != null) {
 156                                         var iad = imported_type.DeclaringAssembly as ImportedAssemblyDefinition;
 157                                         SymbolRelatedToPreviousError (iad.Location);
 158                                 }
 159                         }
 160                 }
 161
 162                 public void SymbolRelatedToPreviousError (MemberCore mc)
 163                 {
 164                         SymbolRelatedToPreviousError (mc.Location, mc.GetSignatureForError ());
 165                 }
 166
 167                 public void SymbolRelatedToPreviousError (string loc)
 168                 {
 169                         string msg = String.Format ("{0} (Location of the symbol related to previous ", loc);
 170                         if (extra_information.Contains (msg))
 171                                 return;
 172
 173                         extra_information.Add (msg);
 174                 }
 175
 176                 public void ExtraInformation (Location loc, string msg)
 177                 {
 178                         extra_information.Add (String.Format ("{0} {1}", loc, msg));
 179                 }
 180
 181                 public WarningRegions RegisterWarningRegion (Location location)
 182                 {
 183                         WarningRegions regions;
 184                         if (warning_regions_table == null) {
 185                                 regions = null;
 186                                 warning_regions_table = new Dictionary<int, WarningRegions> ();
 187                         } else {
 188                                 warning_regions_table.TryGetValue (location.File, out regions);
 189                         }
 190
 191                         if (regions == null) {
 192                                 regions = new WarningRegions ();
 193                                 warning_regions_table.Add (location.File, regions);
 194                         }
 195
 196                         return regions;
 197                 }
 198
 199                 public void Warning (int code, int level, Location loc, string message)
 200                 {
 201                         if (reporting_disabled > 0)
 202                                 return;
 203
 204                         if (!settings.IsWarningEnabled (code, level))
 205                                 return;
 206
 207                         if (warning_regions_table != null && !loc.IsNull) {
 208                                 WarningRegions regions;
 209                                 if (warning_regions_table.TryGetValue (loc.File, out regions) && !regions.IsWarningEnabled (code, loc.Row))
 210                                         return;
 211                         }
 212
 213                         AbstractMessage msg;
 214                         if (settings.IsWarningAsError (code)) {
 215                                 message = "Warning as Error: " + message;
 216                                 msg = new ErrorMessage (code, loc, message, extra_information);
 217                         } else {
 218                                 msg = new WarningMessage (code, loc, message, extra_information);
 219                         }
 220
 221                         extra_information.Clear ();
 222                         printer.Print (msg, settings.ShowFullPaths);
 223                 }
 224
 225                 public void Warning (int code, int level, Location loc, string format, string arg)
 226                 {
 227                         Warning (code, level, loc, String.Format (format, arg));
 228                 }
 229
 230                 public void Warning (int code, int level, Location loc, string format, string arg1, string arg2)
 231                 {
 232                         Warning (code, level, loc, String.Format (format, arg1, arg2));
 233                 }
 234
 235                 public void Warning (int code, int level, Location loc, string format, params object[] args)
 236                 {
 237                         Warning (code, level, loc, String.Format (format, args));
 238                 }
 239
 240                 public void Warning (int code, int level, string message)
 241                 {
 242                         Warning (code, level, Location.Null, message);
 243                 }
 244
 245                 public void Warning (int code, int level, string format, string arg)
 246                 {
 247                         Warning (code, level, Location.Null, format, arg);
 248                 }
 249
 250                 public void Warning (int code, int level, string format, string arg1, string arg2)
 251                 {
 252                         Warning (code, level, Location.Null, format, arg1, arg2);
 253                 }
 254
 255                 public void Warning (int code, int level, string format, params string[] args)
 256                 {
 257                         Warning (code, level, Location.Null, String.Format (format, args));
 258                 }
 259
 260                 //
 261                 // Warnings encountered so far
 262                 //
 263                 public int Warnings {
 264                         get { return printer.WarningsCount; }
 265                 }
 266
 267                 public void Error (int code, Location loc, string error)
 268                 {
 269                         if (reporting_disabled > 0)
 270                                 return;
 271
 272                         ErrorMessage msg = new ErrorMessage (code, loc, error, extra_information);
 273                         extra_information.Clear ();
 274
 275                         printer.Print (msg, settings.ShowFullPaths);
 276
 277                         if (settings.Stacktrace)
 278                                 Console.WriteLine (FriendlyStackTrace (new StackTrace (true)));
 279
 280                         if (printer.ErrorsCount == settings.FatalCounter)
 281                                 throw new FatalException (msg.Text);
 282                 }
 283
 284                 public void Error (int code, Location loc, string format, string arg)
 285                 {
 286                         Error (code, loc, String.Format (format, arg));
 287                 }
 288
 289                 public void Error (int code, Location loc, string format, string arg1, string arg2)
 290                 {
 291                         Error (code, loc, String.Format (format, arg1, arg2));
 292                 }
 293
 294                 public void Error (int code, Location loc, string format, params string[] args)
 295                 {
 296                         Error (code, loc, String.Format (format, args));
 297                 }
 298
 299                 public void Error (int code, string error)
 300                 {
 301                         Error (code, Location.Null, error);
 302                 }
 303
 304                 public void Error (int code, string format, string arg)
 305                 {
 306                         Error (code, Location.Null, format, arg);
 307                 }
 308
 309                 public void Error (int code, string format, string arg1, string arg2)
 310                 {
 311                         Error (code, Location.Null, format, arg1, arg2);
 312                 }
 313
 314                 public void Error (int code, string format, params string[] args)
 315                 {
 316                         Error (code, Location.Null, String.Format (format, args));
 317                 }
 318
 319                 //
 320                 // Errors encountered so far
 321                 //
 322                 public int Errors {
 323                         get { return printer.ErrorsCount; }
 324                 }
 325
 326                 public bool IsDisabled {
 327                         get {
 328                                 return reporting_disabled > 0;
 329                         }
 330                 }
 331
 332                 public ReportPrinter Printer {
 333                         get { return printer; }
 334                 }
 335
 336                 public ReportPrinter SetPrinter (ReportPrinter printer)
 337                 {
 338                         ReportPrinter old = this.printer;
 339                         this.printer = printer;
 340                         return old;
 341                 }
 342
 343                 [Conditional ("MCS_DEBUG")]
 344                 static public void Debug (string message, params object[] args)
 345                 {
 346                         Debug (4, message, args);
 347                 }
 348
 349                 [Conditional ("MCS_DEBUG")]
 350                 static public void Debug (int category, string message, params object[] args)
 351                 {
 352 //                      if ((category & DebugFlags) == 0)
 353 //                              return;
 354
 355                         StringBuilder sb = new StringBuilder (message);
 356
 357                         if ((args != null) && (args.Length > 0)) {
 358                                 sb.Append (": ");
 359
 360                                 bool first = true;
 361                                 foreach (object arg in args) {
 362                                         if (first)
 363                                                 first = false;
 364                                         else
 365                                                 sb.Append (", ");
 366                                         if (arg == null)
 367                                                 sb.Append ("null");
 368 //                                      else if (arg is ICollection)
 369 //                                              sb.Append (PrintCollection ((ICollection) arg));
 370                                         else
 371                                                 sb.Append (arg);
 372                                 }
 373                         }
 374
 375                         Console.WriteLine (sb.ToString ());
 376                 }
 377 /*
 378                 static public string PrintCollection (ICollection collection)
 379                 {
 380                         StringBuilder sb = new StringBuilder ();
 381
 382                         sb.Append (collection.GetType ());
 383                         sb.Append ("(");
 384
 385                         bool first = true;
 386                         foreach (object o in collection) {
 387                                 if (first)
 388                                         first = false;
 389                                 else
 390                                         sb.Append (", ");
 391                                 sb.Append (o);
 392                         }
 393
 394                         sb.Append (")");
 395                         return sb.ToString ();
 396                 }
 397 */
 398                 static string FriendlyStackTrace (StackTrace t)
 399                 {
 400                         StringBuilder sb = new StringBuilder ();
 401
 402                         bool foundUserCode = false;
 403
 404                         for (int i = 0; i < t.FrameCount; i++) {
 405                                 StackFrame f = t.GetFrame (i);
 406                                 var mb = f.GetMethod ();
 407
 408                                 if (!foundUserCode && mb.ReflectedType == typeof (Report))
 409                                         continue;
 410
 411                                 foundUserCode = true;
 412
 413                                 sb.Append ("\tin ");
 414
 415                                 if (f.GetFileLineNumber () > 0)
 416                                         sb.AppendFormat ("(at {0}:{1}) ", f.GetFileName (), f.GetFileLineNumber ());
 417
 418                                 sb.AppendFormat ("{0}.{1} (", mb.ReflectedType.Name, mb.Name);
 419
 420                                 bool first = true;
 421                                 foreach (var pi in mb.GetParameters ()) {
 422                                         if (!first)
 423                                                 sb.Append (", ");
 424                                         first = false;
 425
 426                                         sb.Append (pi.ParameterType.FullName);
 427                                 }
 428                                 sb.Append (")\n");
 429                         }
 430
 431                         return sb.ToString ();
 432                 }
 433         }
 434
 435         public abstract class AbstractMessage
 436         {
 437                 readonly string[] extra_info;
 438                 protected readonly int code;
 439                 protected readonly Location location;
 440                 readonly string message;
 441
 442                 protected AbstractMessage (int code, Location loc, string msg, List<string> extraInfo)
 443                 {
 444                         this.code = code;
 445                         if (code < 0)
 446                                 this.code = 8000 - code;
 447
 448                         this.location = loc;
 449                         this.message = msg;
 450                         if (extraInfo.Count != 0) {
 451                                 this.extra_info = extraInfo.ToArray ();
 452                         }
 453                 }
 454
 455                 protected AbstractMessage (AbstractMessage aMsg)
 456                 {
 457                         this.code = aMsg.code;
 458                         this.location = aMsg.location;
 459                         this.message = aMsg.message;
 460                         this.extra_info = aMsg.extra_info;
 461                 }
 462
 463                 public int Code {
 464                         get { return code; }
 465                 }
 466
 467                 public override bool Equals (object obj)
 468                 {
 469                         AbstractMessage msg = obj as AbstractMessage;
 470                         if (msg == null)
 471                                 return false;
 472
 473                         return code == msg.code && location.Equals (msg.location) && message == msg.message;
 474                 }
 475
 476                 public override int GetHashCode ()
 477                 {
 478                         return code.GetHashCode ();
 479                 }
 480
 481                 public abstract bool IsWarning { get; }
 482
 483                 public Location Location {
 484                         get { return location; }
 485                 }
 486
 487                 public abstract string MessageType { get; }
 488
 489                 public string[] RelatedSymbols {
 490                         get { return extra_info; }
 491                 }
 492
 493                 public string Text {
 494                         get { return message; }
 495                 }
 496         }
 497
 498         sealed class WarningMessage : AbstractMessage
 499         {
 500                 public WarningMessage (int code, Location loc, string message, List<string> extra_info)
 501                         : base (code, loc, message, extra_info)
 502                 {
 503                 }
 504
 505                 public override bool IsWarning {
 506                         get { return true; }
 507                 }
 508
 509                 public override string MessageType {
 510                         get {
 511                                 return "warning";
 512                         }
 513                 }
 514         }
 515
 516         sealed class ErrorMessage : AbstractMessage
 517         {
 518                 public ErrorMessage (int code, Location loc, string message, List<string> extraInfo)
 519                         : base (code, loc, message, extraInfo)
 520                 {
 521                 }
 522
 523                 public ErrorMessage (AbstractMessage aMsg)
 524                         : base (aMsg)
 525                 {
 526                 }
 527
 528                 public override bool IsWarning {
 529                         get { return false; }
 530                 }
 531
 532                 public override string MessageType {
 533                         get {
 534                                 return "error";
 535                         }
 536                 }
 537         }
 538
 539         //
 540         // Generic base for any message writer
 541         //
 542         public abstract class ReportPrinter
 543         {
 544                 protected HashSet<ITypeDefinition> reported_missing_definitions;
 545
 546                 #region Properties
 547
 548                 public int ErrorsCount { get; protected set; }
 549
 550                 public int WarningsCount { get; private set; }
 551
 552                 //
 553                 // When (symbols related to previous ...) can be used
 554                 //
 555                 public virtual bool HasRelatedSymbolSupport {
 556                         get { return true; }
 557                 }
 558
 559                 #endregion
 560
 561
 562                 protected virtual string FormatText (string txt)
 563                 {
 564                         return txt;
 565                 }
 566
 567                 public virtual void Print (AbstractMessage msg, bool showFullPath)
 568                 {
 569                         if (msg.IsWarning) {
 570                                 ++WarningsCount;
 571                         } else {
 572                                 ++ErrorsCount;
 573                         }
 574                 }
 575
 576                 protected void Print (AbstractMessage msg, TextWriter output, bool showFullPath)
 577                 {
 578                         StringBuilder txt = new StringBuilder ();
 579                         if (!msg.Location.IsNull) {
 580                                 if (showFullPath)
 581                                         txt.Append (msg.Location.ToStringFullName ());
 582                                 else
 583                                         txt.Append (msg.Location.ToString ());
 584
 585                                 txt.Append (" ");
 586                         }
 587
 588                         txt.AppendFormat ("{0} CS{1:0000}: {2}", msg.MessageType, msg.Code, msg.Text);
 589
 590                         if (!msg.IsWarning)
 591                                 output.WriteLine (FormatText (txt.ToString ()));
 592                         else
 593                                 output.WriteLine (txt.ToString ());
 594
 595                         if (msg.RelatedSymbols != null) {
 596                                 foreach (string s in msg.RelatedSymbols)
 597                                         output.WriteLine (s + msg.MessageType + ")");
 598                         }
 599                 }
 600
 601                 //
 602                 // Tracks reported missing types. It needs to be session specific
 603                 // because we can run in probing mode
 604                 //
 605                 public bool MissingTypeReported (ITypeDefinition typeDefinition)
 606                 {
 607                         if (reported_missing_definitions == null)
 608                                 reported_missing_definitions = new HashSet<ITypeDefinition> ();
 609
 610                         if (reported_missing_definitions.Contains (typeDefinition))
 611                                 return true;
 612
 613                         reported_missing_definitions.Add (typeDefinition);
 614                         return false;
 615                 }
 616
 617                 public void Reset ()
 618                 {
 619                         // HACK: Temporary hack for broken repl flow
 620                         ErrorsCount = WarningsCount = 0;
 621                 }
 622         }
 623
 624         sealed class NullReportPrinter : ReportPrinter
 625         {
 626         }
 627
 628         //
 629         // Default message recorder, it uses two types of message groups.
 630         // Common messages: messages reported in all sessions.
 631         // Merged messages: union of all messages in all sessions.
 632         //
 633         // Used by the Lambda expressions to compile the code with various
 634         // parameter values, or by attribute resolver
 635         //
 636         class SessionReportPrinter : ReportPrinter
 637         {
 638                 List<AbstractMessage> session_messages;
 639                 //
 640                 // A collection of exactly same messages reported in all sessions
 641                 //
 642                 List<AbstractMessage> common_messages;
 643
 644                 //
 645                 // A collection of unique messages reported in all sessions
 646                 //
 647                 List<AbstractMessage> merged_messages;
 648
 649                 bool showFullPaths;
 650
 651                 public void ClearSession ()
 652                 {
 653                         session_messages = null;
 654                 }
 655
 656                 public override void Print (AbstractMessage msg, bool showFullPath)
 657                 {
 658                         //
 659                         // This line is useful when debugging recorded messages
 660                         //
 661                         // Console.WriteLine ("RECORDING: {0}", msg.Text);
 662
 663                         if (session_messages == null)
 664                                 session_messages = new List<AbstractMessage> ();
 665
 666                         session_messages.Add (msg);
 667
 668                         this.showFullPaths = showFullPath;
 669                         base.Print (msg, showFullPath);
 670                 }
 671
 672                 public void EndSession ()
 673                 {
 674                         if (session_messages == null)
 675                                 return;
 676
 677                         //
 678                         // Handles the first session
 679                         //
 680                         if (common_messages == null) {
 681                                 common_messages = new List<AbstractMessage> (session_messages);
 682                                 merged_messages = session_messages;
 683                                 session_messages = null;
 684                                 return;
 685                         }
 686
 687                         //
 688                         // Store common messages if any
 689                         //
 690                         for (int i = 0; i < common_messages.Count; ++i) {
 691                                 AbstractMessage cmsg = common_messages[i];
 692                                 bool common_msg_found = false;
 693                                 foreach (AbstractMessage msg in session_messages) {
 694                                         if (cmsg.Equals (msg)) {
 695                                                 common_msg_found = true;
 696                                                 break;
 697                                         }
 698                                 }
 699
 700                                 if (!common_msg_found)
 701                                         common_messages.RemoveAt (i);
 702                         }
 703
 704                         //
 705                         // Merge session and previous messages
 706                         //
 707                         for (int i = 0; i < session_messages.Count; ++i) {
 708                                 AbstractMessage msg = session_messages[i];
 709                                 bool msg_found = false;
 710                                 for (int ii = 0; ii < merged_messages.Count; ++ii) {
 711                                         if (msg.Equals (merged_messages[ii])) {
 712                                                 msg_found = true;
 713                                                 break;
 714                                         }
 715                                 }
 716
 717                                 if (!msg_found)
 718                                         merged_messages.Add (msg);
 719                         }
 720                 }
 721
 722                 public bool IsEmpty {
 723                         get {
 724                                 return merged_messages == null && common_messages == null;
 725                         }
 726                 }
 727
 728                 //
 729                 // Prints collected messages, common messages have a priority
 730                 //
 731                 public bool Merge (ReportPrinter dest)
 732                 {
 733                         var messages_to_print = merged_messages;
 734                         if (common_messages != null && common_messages.Count > 0) {
 735                                 messages_to_print = common_messages;
 736                         }
 737
 738                         if (messages_to_print == null)
 739                                 return false;
 740
 741                         bool error_msg = false;
 742                         foreach (AbstractMessage msg in messages_to_print) {
 743                                 dest.Print (msg, showFullPaths);
 744                                 error_msg |= !msg.IsWarning;
 745                         }
 746
 747                         if (reported_missing_definitions != null) {
 748                                 foreach (var missing in reported_missing_definitions)
 749                                         dest.MissingTypeReported (missing);
 750                         }
 751
 752                         return error_msg;
 753                 }
 754         }
 755
 756         public class StreamReportPrinter : ReportPrinter
 757         {
 758                 readonly TextWriter writer;
 759
 760                 public StreamReportPrinter (TextWriter writer)
 761                 {
 762                         this.writer = writer;
 763                 }
 764
 765                 public override void Print (AbstractMessage msg, bool showFullPath)
 766                 {
 767                         Print (msg, writer, showFullPath);
 768                         base.Print (msg, showFullPath);
 769                 }
 770         }
 771
 772         public class ConsoleReportPrinter : StreamReportPrinter
 773         {
 774                 static readonly string prefix, postfix;
 775
 776                 static ConsoleReportPrinter ()
 777                 {
 778                         string term = Environment.GetEnvironmentVariable ("TERM");
 779                         bool xterm_colors = false;
 780
 781                         switch (term){
 782                         case "xterm":
 783                         case "rxvt":
 784                         case "rxvt-unicode":
 785                                 if (Environment.GetEnvironmentVariable ("COLORTERM") != null){
 786                                         xterm_colors = true;
 787                                 }
 788                                 break;
 789
 790                         case "xterm-color":
 791                         case "xterm-256color":
 792                                 xterm_colors = true;
 793                                 break;
 794                         }
 795                         if (!xterm_colors)
 796                                 return;
 797
 798                         if (!(UnixUtils.isatty (1) && UnixUtils.isatty (2)))
 799                                 return;
 800
 801                         string config = Environment.GetEnvironmentVariable ("MCS_COLORS");
 802                         if (config == null){
 803                                 config = "errors=red";
 804                                 //config = "brightwhite,red";
 805                         }
 806
 807                         if (config == "disable")
 808                                 return;
 809
 810                         if (!config.StartsWith ("errors="))
 811                                 return;
 812
 813                         config = config.Substring (7);
 814
 815                         int p = config.IndexOf (",");
 816                         if (p == -1)
 817                                 prefix = GetForeground (config);
 818                         else
 819                                 prefix = GetBackground (config.Substring (p+1)) + GetForeground (config.Substring (0, p));
 820                         postfix = "\x001b[0m";
 821                 }
 822
 823                 public ConsoleReportPrinter ()
 824                         : base (Console.Error)
 825                 {
 826                 }
 827
 828                 public ConsoleReportPrinter (TextWriter writer)
 829                         : base (writer)
 830                 {
 831                 }
 832
 833                 static int NameToCode (string s)
 834                 {
 835                         switch (s) {
 836                         case "black":
 837                                 return 0;
 838                         case "red":
 839                                 return 1;
 840                         case "green":
 841                                 return 2;
 842                         case "yellow":
 843                                 return 3;
 844                         case "blue":
 845                                 return 4;
 846                         case "magenta":
 847                                 return 5;
 848                         case "cyan":
 849                                 return 6;
 850                         case "grey":
 851                         case "white":
 852                                 return 7;
 853                         }
 854                         return 7;
 855                 }
 856
 857                 //
 858                 // maps a color name to its xterm color code
 859                 //
 860                 static string GetForeground (string s)
 861                 {
 862                         string highcode;
 863
 864                         if (s.StartsWith ("bright")) {
 865                                 highcode = "1;";
 866                                 s = s.Substring (6);
 867                         } else
 868                                 highcode = "";
 869
 870                         return "\x001b[" + highcode + (30 + NameToCode (s)).ToString () + "m";
 871                 }
 872
 873                 static string GetBackground (string s)
 874                 {
 875                         return "\x001b[" + (40 + NameToCode (s)).ToString () + "m";
 876                 }
 877
 878                 protected override string FormatText (string txt)
 879                 {
 880                         if (prefix != null)
 881                                 return prefix + txt + postfix;
 882
 883                         return txt;
 884                 }
 885         }
 886
 887         class TimeReporter
 888         {
 889                 public enum TimerType
 890                 {
 891                         ParseTotal,
 892                         AssemblyBuilderSetup,
 893                         CreateTypeTotal,
 894                         ReferencesLoading,
 895                         ReferencesImporting,
 896                         PredefinedTypesInit,
 897                         ModuleDefinitionTotal,
 898                         EmitTotal,
 899                         CloseTypes,
 900                         Resouces,
 901                         OutputSave,
 902                         DebugSave,
 903                 }
 904
 905                 readonly Stopwatch[] timers;
 906                 Stopwatch total;
 907
 908                 public TimeReporter (bool enabled)
 909                 {
 910                         if (!enabled)
 911                                 return;
 912
 913                         timers = new Stopwatch[System.Enum.GetValues(typeof (TimerType)).Length];
 914                 }
 915
 916                 public void Start (TimerType type)
 917                 {
 918                         if (timers != null) {
 919                                 var sw = new Stopwatch ();
 920                                 timers[(int) type] = sw;
 921                                 sw.Start ();
 922                         }
 923                 }
 924
 925                 public void StartTotal ()
 926                 {
 927                         total = new Stopwatch ();
 928                         total.Start ();
 929                 }
 930
 931                 public void Stop (TimerType type)
 932                 {
 933                         if (timers != null) {
 934                                 timers[(int) type].Stop ();
 935                         }
 936                 }
 937
 938                 public void StopTotal ()
 939                 {
 940                         total.Stop ();
 941                 }
 942
 943                 public void ShowStats ()
 944                 {
 945                         if (timers == null)
 946                                 return;
 947
 948                         Dictionary<TimerType, string> timer_names = new Dictionary<TimerType,string> {
 949                                 { TimerType.ParseTotal, "Parsing source files" },
 950                                 { TimerType.AssemblyBuilderSetup, "Assembly builder setup" },
 951                                 { TimerType.CreateTypeTotal, "Compiled types created" },
 952                                 { TimerType.ReferencesLoading, "Referenced assemblies loading" },
 953                                 { TimerType.ReferencesImporting, "Referenced assemblies importing" },
 954                                 { TimerType.PredefinedTypesInit, "Predefined types initialization" },
 955                                 { TimerType.ModuleDefinitionTotal, "Module definition" },
 956                                 { TimerType.EmitTotal, "Resolving and emitting members blocks" },
 957                                 { TimerType.CloseTypes, "Module types closed" },
 958                                 { TimerType.Resouces, "Embedding resources" },
 959                                 { TimerType.OutputSave, "Writing output file" },
 960                                 { TimerType.DebugSave, "Writing debug symbols file" },
 961                         };
 962
 963                         int counter = 0;
 964                         double percentage = (double) total.ElapsedMilliseconds / 100;
 965                         long subtotal = total.ElapsedMilliseconds;
 966                         foreach (var timer in timers) {
 967                                 string msg = timer_names[(TimerType) counter++];
 968                                 var ms = timer == null ? 0 : timer.ElapsedMilliseconds;
 969                                 Console.WriteLine ("{0,4:0.0}% {1,5}ms {2}", ms / percentage, ms, msg);
 970                                 subtotal -= ms;
 971                         }
 972
 973                         Console.WriteLine ("{0,4:0.0}% {1,5}ms Other tasks", subtotal / percentage, subtotal);
 974                         Console.WriteLine ();
 975                         Console.WriteLine ("Total elapsed time: {0}", total.Elapsed);
 976                 }
 977         }
 978
 979         public class InternalErrorException : Exception {
 980                 public InternalErrorException (MemberCore mc, Exception e)
 981                         : base (mc.Location + " " + mc.GetSignatureForError (), e)
 982                 {
 983                 }
 984
 985                 public InternalErrorException ()
 986                         : base ("Internal error")
 987                 {
 988                 }
 989
 990                 public InternalErrorException (string message)
 991                         : base (message)
 992                 {
 993                 }
 994
 995                 public InternalErrorException (string message, params object[] args)
 996                         : base (String.Format (message, args))
 997                 {
 998                 }
 999
1000                 public InternalErrorException (Exception exception, string message, params object[] args)
1001                         : base (String.Format (message, args), exception)
1002                 {
1003                 }
1004
1005                 public InternalErrorException (Exception e, Location loc)
1006                         : base (loc.ToString (), e)
1007                 {
1008                 }
1009         }
1010
1011         class FatalException : Exception
1012         {
1013                 public FatalException (string message)
1014                         : base (message)
1015                 {
1016                 }
1017         }
1018
1019         /// <summary>
1020         /// Handles #pragma warning
1021         /// </summary>
1022         public class WarningRegions {
1023
1024                 abstract class PragmaCmd
1025                 {
1026                         public int Line;
1027
1028                         protected PragmaCmd (int line)
1029                         {
1030                                 Line = line;
1031                         }
1032
1033                         public abstract bool IsEnabled (int code, bool previous);
1034                 }
1035
1036                 class Disable : PragmaCmd
1037                 {
1038                         int code;
1039                         public Disable (int line, int code)
1040                                 : base (line)
1041                         {
1042                                 this.code = code;
1043                         }
1044
1045                         public override bool IsEnabled (int code, bool previous)
1046                         {
1047                                 return this.code != code && previous;
1048                         }
1049                 }
1050
1051                 class DisableAll : PragmaCmd
1052                 {
1053                         public DisableAll (int line)
1054                                 : base (line) {}
1055
1056                         public override bool IsEnabled(int code, bool previous)
1057                         {
1058                                 return false;
1059                         }
1060                 }
1061
1062                 class Enable : PragmaCmd
1063                 {
1064                         int code;
1065                         public Enable (int line, int code)
1066                                 : base (line)
1067                         {
1068                                 this.code = code;
1069                         }
1070
1071                         public override bool IsEnabled(int code, bool previous)
1072                         {
1073                                 return this.code == code || previous;
1074                         }
1075                 }
1076
1077                 class EnableAll : PragmaCmd
1078                 {
1079                         public EnableAll (int line)
1080                                 : base (line) {}
1081
1082                         public override bool IsEnabled(int code, bool previous)
1083                         {
1084                                 return true;
1085                         }
1086                 }
1087
1088
1089                 List<PragmaCmd> regions = new List<PragmaCmd> ();
1090
1091                 public void WarningDisable (int line)
1092                 {
1093                         regions.Add (new DisableAll (line));
1094                 }
1095
1096                 public void WarningDisable (Location location, int code, Report Report)
1097                 {
1098                         regions.Add (new Disable (location.Row, code));
1099                 }
1100
1101                 public void WarningEnable (int line)
1102                 {
1103                         regions.Add (new EnableAll (line));
1104                 }
1105
1106                 public void WarningEnable (Location location, int code, CompilerContext context)
1107                 {
1108                         if (context.Settings.IsWarningDisabledGlobally (code))
1109                                 context.Report.Warning (1635, 1, location, "Cannot restore warning `CS{0:0000}' because it was disabled globally", code);
1110
1111                         regions.Add (new Enable (location.Row, code));
1112                 }
1113
1114                 public bool IsWarningEnabled (int code, int src_line)
1115                 {
1116                         bool result = true;
1117                         foreach (PragmaCmd pragma in regions) {
1118                                 if (src_line < pragma.Line)
1119                                         break;
1120
1121                                 result = pragma.IsEnabled (code, result);
1122                         }
1123                         return result;
1124                 }
1125         }
1126 }