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                         case LanguageVersion.V_7:
 108                                 version = "7.0";
 109                                 break;
 110                         default:
 111                                 throw new InternalErrorException ("Invalid feature version", compiler.Settings.Version);
 112                         }
 113
 114                         Error (1644, loc,
 115                                 "Feature `{0}' cannot be used because it is not part of the C# {1} language specification",
 116                                       feature, version);
 117                 }
 118
 119                 public void FeatureIsNotSupported (Location loc, string feature)
 120                 {
 121                         Error (1644, loc,
 122                                 "Feature `{0}' is not supported in Mono mcs1 compiler. Consider using the `gmcs' compiler instead",
 123                                 feature);
 124                 }
 125
 126                 public void RuntimeMissingSupport (Location loc, string feature)
 127                 {
 128                         Error (-88, loc, "Your .NET Runtime does not support `{0}'. Please use the latest Mono runtime instead.", feature);
 129                 }
 130
 131                 /// <summary>
 132                 /// In most error cases is very useful to have information about symbol that caused the error.
 133                 /// Call this method before you call Report.Error when it makes sense.
 134                 /// </summary>
 135                 public void SymbolRelatedToPreviousError (Location loc, string symbol)
 136                 {
 137                         SymbolRelatedToPreviousError (loc.ToString ());
 138                 }
 139
 140                 public void SymbolRelatedToPreviousError (MemberSpec ms)
 141                 {
 142                         if (reporting_disabled > 0 || !printer.HasRelatedSymbolSupport)
 143                                 return;
 144
 145                         var mc = ms.MemberDefinition as MemberCore;
 146                         while (ms is ElementTypeSpec) {
 147                                 ms = ((ElementTypeSpec) ms).Element;
 148                                 mc = ms.MemberDefinition as MemberCore;
 149                         }
 150
 151                         if (mc != null) {
 152                                 SymbolRelatedToPreviousError (mc);
 153                         } else {
 154                                 if (ms.DeclaringType != null)
 155                                         ms = ms.DeclaringType;
 156
 157                                 var imported_type = ms.MemberDefinition as ImportedTypeDefinition;
 158                                 if (imported_type != null) {
 159                                         var iad = imported_type.DeclaringAssembly as ImportedAssemblyDefinition;
 160                                         SymbolRelatedToPreviousError (iad.Location);
 161                                 }
 162                         }
 163                 }
 164
 165                 public void SymbolRelatedToPreviousError (MemberCore mc)
 166                 {
 167                         SymbolRelatedToPreviousError (mc.Location, mc.GetSignatureForError ());
 168                 }
 169
 170                 public void SymbolRelatedToPreviousError (string loc)
 171                 {
 172                         string msg = String.Format ("{0} (Location of the symbol related to previous ", loc);
 173                         if (extra_information.Contains (msg))
 174                                 return;
 175
 176                         extra_information.Add (msg);
 177                 }
 178
 179                 public void ExtraInformation (Location loc, string msg)
 180                 {
 181                         extra_information.Add (String.Format ("{0} {1}", loc, msg));
 182                 }
 183
 184                 public WarningRegions RegisterWarningRegion (Location location)
 185                 {
 186                         WarningRegions regions;
 187                         if (warning_regions_table == null) {
 188                                 regions = null;
 189                                 warning_regions_table = new Dictionary<int, WarningRegions> ();
 190                         } else {
 191                                 warning_regions_table.TryGetValue (location.File, out regions);
 192                         }
 193
 194                         if (regions == null) {
 195                                 regions = new WarningRegions ();
 196                                 warning_regions_table.Add (location.File, regions);
 197                         }
 198
 199                         return regions;
 200                 }
 201
 202                 public void Warning (int code, int level, Location loc, string message)
 203                 {
 204                         if (reporting_disabled > 0)
 205                                 return;
 206
 207                         if (!settings.IsWarningEnabled (code, level))
 208                                 return;
 209
 210                         if (warning_regions_table != null && !loc.IsNull) {
 211                                 WarningRegions regions;
 212                                 if (warning_regions_table.TryGetValue (loc.File, out regions) && !regions.IsWarningEnabled (code, loc.Row))
 213                                         return;
 214                         }
 215
 216                         AbstractMessage msg;
 217                         if (settings.IsWarningAsError (code)) {
 218                                 message = "Warning as Error: " + message;
 219                                 msg = new ErrorMessage (code, loc, message, extra_information);
 220                         } else {
 221                                 msg = new WarningMessage (code, loc, message, extra_information);
 222                         }
 223
 224                         extra_information.Clear ();
 225                         printer.Print (msg, settings.ShowFullPaths);
 226                 }
 227
 228                 public void Warning (int code, int level, Location loc, string format, string arg)
 229                 {
 230                         Warning (code, level, loc, String.Format (format, arg));
 231                 }
 232
 233                 public void Warning (int code, int level, Location loc, string format, string arg1, string arg2)
 234                 {
 235                         Warning (code, level, loc, String.Format (format, arg1, arg2));
 236                 }
 237
 238                 public void Warning (int code, int level, Location loc, string format, params object[] args)
 239                 {
 240                         Warning (code, level, loc, String.Format (format, args));
 241                 }
 242
 243                 public void Warning (int code, int level, string message)
 244                 {
 245                         Warning (code, level, Location.Null, message);
 246                 }
 247
 248                 public void Warning (int code, int level, string format, string arg)
 249                 {
 250                         Warning (code, level, Location.Null, format, arg);
 251                 }
 252
 253                 public void Warning (int code, int level, string format, string arg1, string arg2)
 254                 {
 255                         Warning (code, level, Location.Null, format, arg1, arg2);
 256                 }
 257
 258                 public void Warning (int code, int level, string format, params string[] args)
 259                 {
 260                         Warning (code, level, Location.Null, String.Format (format, args));
 261                 }
 262
 263                 //
 264                 // Warnings encountered so far
 265                 //
 266                 public int Warnings {
 267                         get { return printer.WarningsCount; }
 268                 }
 269
 270                 public void Error (int code, Location loc, string error)
 271                 {
 272                         if (reporting_disabled > 0)
 273                                 return;
 274
 275                         ErrorMessage msg = new ErrorMessage (code, loc, error, extra_information);
 276                         extra_information.Clear ();
 277
 278                         printer.Print (msg, settings.ShowFullPaths);
 279
 280                         if (settings.Stacktrace)
 281                                 Console.WriteLine (FriendlyStackTrace (new StackTrace (true)));
 282
 283                         if (printer.ErrorsCount == settings.FatalCounter)
 284                                 throw new FatalException (msg.Text);
 285                 }
 286
 287                 public void Error (int code, Location loc, string format, string arg)
 288                 {
 289                         Error (code, loc, String.Format (format, arg));
 290                 }
 291
 292                 public void Error (int code, Location loc, string format, string arg1, string arg2)
 293                 {
 294                         Error (code, loc, String.Format (format, arg1, arg2));
 295                 }
 296
 297                 public void Error (int code, Location loc, string format, params string[] args)
 298                 {
 299                         Error (code, loc, String.Format (format, args));
 300                 }
 301
 302                 public void Error (int code, string error)
 303                 {
 304                         Error (code, Location.Null, error);
 305                 }
 306
 307                 public void Error (int code, string format, string arg)
 308                 {
 309                         Error (code, Location.Null, format, arg);
 310                 }
 311
 312                 public void Error (int code, string format, string arg1, string arg2)
 313                 {
 314                         Error (code, Location.Null, format, arg1, arg2);
 315                 }
 316
 317                 public void Error (int code, string format, params string[] args)
 318                 {
 319                         Error (code, Location.Null, String.Format (format, args));
 320                 }
 321
 322                 //
 323                 // Errors encountered so far
 324                 //
 325                 public int Errors {
 326                         get { return printer.ErrorsCount; }
 327                 }
 328
 329                 public bool IsDisabled {
 330                         get {
 331                                 return reporting_disabled > 0;
 332                         }
 333                 }
 334
 335                 public ReportPrinter Printer {
 336                         get { return printer; }
 337                 }
 338
 339                 public ReportPrinter SetPrinter (ReportPrinter printer)
 340                 {
 341                         ReportPrinter old = this.printer;
 342                         this.printer = printer;
 343                         return old;
 344                 }
 345
 346                 [Conditional ("MCS_DEBUG")]
 347                 static public void Debug (string message, params object[] args)
 348                 {
 349                         Debug (4, message, args);
 350                 }
 351
 352                 [Conditional ("MCS_DEBUG")]
 353                 static public void Debug (int category, string message, params object[] args)
 354                 {
 355 //                      if ((category & DebugFlags) == 0)
 356 //                              return;
 357
 358                         StringBuilder sb = new StringBuilder (message);
 359
 360                         if ((args != null) && (args.Length > 0)) {
 361                                 sb.Append (": ");
 362
 363                                 bool first = true;
 364                                 foreach (object arg in args) {
 365                                         if (first)
 366                                                 first = false;
 367                                         else
 368                                                 sb.Append (", ");
 369                                         if (arg == null)
 370                                                 sb.Append ("null");
 371 //                                      else if (arg is ICollection)
 372 //                                              sb.Append (PrintCollection ((ICollection) arg));
 373                                         else
 374                                                 sb.Append (arg);
 375                                 }
 376                         }
 377
 378                         Console.WriteLine (sb.ToString ());
 379                 }
 380 /*
 381                 static public string PrintCollection (ICollection collection)
 382                 {
 383                         StringBuilder sb = new StringBuilder ();
 384
 385                         sb.Append (collection.GetType ());
 386                         sb.Append ("(");
 387
 388                         bool first = true;
 389                         foreach (object o in collection) {
 390                                 if (first)
 391                                         first = false;
 392                                 else
 393                                         sb.Append (", ");
 394                                 sb.Append (o);
 395                         }
 396
 397                         sb.Append (")");
 398                         return sb.ToString ();
 399                 }
 400 */
 401                 static string FriendlyStackTrace (StackTrace t)
 402                 {
 403                         StringBuilder sb = new StringBuilder ();
 404
 405                         bool foundUserCode = false;
 406
 407                         for (int i = 0; i < t.FrameCount; i++) {
 408                                 StackFrame f = t.GetFrame (i);
 409                                 var mb = f.GetMethod ();
 410
 411                                 if (!foundUserCode && mb.ReflectedType == typeof (Report))
 412                                         continue;
 413
 414                                 foundUserCode = true;
 415
 416                                 sb.Append ("\tin ");
 417
 418                                 if (f.GetFileLineNumber () > 0)
 419                                         sb.AppendFormat ("(at {0}:{1}) ", f.GetFileName (), f.GetFileLineNumber ());
 420
 421                                 sb.AppendFormat ("{0}.{1} (", mb.ReflectedType.Name, mb.Name);
 422
 423                                 bool first = true;
 424                                 foreach (var pi in mb.GetParameters ()) {
 425                                         if (!first)
 426                                                 sb.Append (", ");
 427                                         first = false;
 428
 429                                         sb.Append (pi.ParameterType.FullName);
 430                                 }
 431                                 sb.Append (")\n");
 432                         }
 433
 434                         return sb.ToString ();
 435                 }
 436         }
 437
 438         public abstract class AbstractMessage
 439         {
 440                 readonly string[] extra_info;
 441                 protected readonly int code;
 442                 protected readonly Location location;
 443                 readonly string message;
 444
 445                 protected AbstractMessage (int code, Location loc, string msg, List<string> extraInfo)
 446                 {
 447                         this.code = code;
 448                         if (code < 0)
 449                                 this.code = 8000 - code;
 450
 451                         this.location = loc;
 452                         this.message = msg;
 453                         if (extraInfo.Count != 0) {
 454                                 this.extra_info = extraInfo.ToArray ();
 455                         }
 456                 }
 457
 458                 protected AbstractMessage (AbstractMessage aMsg)
 459                 {
 460                         this.code = aMsg.code;
 461                         this.location = aMsg.location;
 462                         this.message = aMsg.message;
 463                         this.extra_info = aMsg.extra_info;
 464                 }
 465
 466                 public int Code {
 467                         get { return code; }
 468                 }
 469
 470                 public override bool Equals (object obj)
 471                 {
 472                         AbstractMessage msg = obj as AbstractMessage;
 473                         if (msg == null)
 474                                 return false;
 475
 476                         return code == msg.code && location.Equals (msg.location) && message == msg.message;
 477                 }
 478
 479                 public override int GetHashCode ()
 480                 {
 481                         return code.GetHashCode ();
 482                 }
 483
 484                 public abstract bool IsWarning { get; }
 485
 486                 public Location Location {
 487                         get { return location; }
 488                 }
 489
 490                 public abstract string MessageType { get; }
 491
 492                 public string[] RelatedSymbols {
 493                         get { return extra_info; }
 494                 }
 495
 496                 public string Text {
 497                         get { return message; }
 498                 }
 499         }
 500
 501         sealed class WarningMessage : AbstractMessage
 502         {
 503                 public WarningMessage (int code, Location loc, string message, List<string> extra_info)
 504                         : base (code, loc, message, extra_info)
 505                 {
 506                 }
 507
 508                 public override bool IsWarning {
 509                         get { return true; }
 510                 }
 511
 512                 public override string MessageType {
 513                         get {
 514                                 return "warning";
 515                         }
 516                 }
 517         }
 518
 519         sealed class ErrorMessage : AbstractMessage
 520         {
 521                 public ErrorMessage (int code, Location loc, string message, List<string> extraInfo)
 522                         : base (code, loc, message, extraInfo)
 523                 {
 524                 }
 525
 526                 public ErrorMessage (AbstractMessage aMsg)
 527                         : base (aMsg)
 528                 {
 529                 }
 530
 531                 public override bool IsWarning {
 532                         get { return false; }
 533                 }
 534
 535                 public override string MessageType {
 536                         get {
 537                                 return "error";
 538                         }
 539                 }
 540         }
 541
 542         //
 543         // Generic base for any message writer
 544         //
 545         public abstract class ReportPrinter
 546         {
 547                 protected HashSet<ITypeDefinition> reported_missing_definitions;
 548
 549                 #region Properties
 550
 551                 public int ErrorsCount { get; protected set; }
 552
 553                 public int WarningsCount { get; private set; }
 554
 555                 //
 556                 // When (symbols related to previous ...) can be used
 557                 //
 558                 public virtual bool HasRelatedSymbolSupport {
 559                         get { return true; }
 560                 }
 561
 562                 #endregion
 563
 564
 565                 protected virtual string FormatText (string txt)
 566                 {
 567                         return txt;
 568                 }
 569
 570                 public virtual void Print (AbstractMessage msg, bool showFullPath)
 571                 {
 572                         if (msg.IsWarning) {
 573                                 ++WarningsCount;
 574                         } else {
 575                                 ++ErrorsCount;
 576                         }
 577                 }
 578
 579                 protected void Print (AbstractMessage msg, TextWriter output, bool showFullPath)
 580                 {
 581                         StringBuilder txt = new StringBuilder ();
 582                         if (!msg.Location.IsNull) {
 583                                 if (showFullPath)
 584                                         txt.Append (msg.Location.ToStringFullName ());
 585                                 else
 586                                         txt.Append (msg.Location.ToString ());
 587
 588                                 txt.Append (" ");
 589                         }
 590
 591                         txt.AppendFormat ("{0} CS{1:0000}: {2}", msg.MessageType, msg.Code, msg.Text);
 592
 593                         if (!msg.IsWarning)
 594                                 output.WriteLine (FormatText (txt.ToString ()));
 595                         else
 596                                 output.WriteLine (txt.ToString ());
 597
 598                         if (msg.RelatedSymbols != null) {
 599                                 foreach (string s in msg.RelatedSymbols)
 600                                         output.WriteLine (s + msg.MessageType + ")");
 601                         }
 602                 }
 603
 604                 //
 605                 // Tracks reported missing types. It needs to be session specific
 606                 // because we can run in probing mode
 607                 //
 608                 public bool MissingTypeReported (ITypeDefinition typeDefinition)
 609                 {
 610                         if (reported_missing_definitions == null)
 611                                 reported_missing_definitions = new HashSet<ITypeDefinition> ();
 612
 613                         if (reported_missing_definitions.Contains (typeDefinition))
 614                                 return true;
 615
 616                         reported_missing_definitions.Add (typeDefinition);
 617                         return false;
 618                 }
 619
 620                 public void Reset ()
 621                 {
 622                         // HACK: Temporary hack for broken repl flow
 623                         ErrorsCount = WarningsCount = 0;
 624                 }
 625         }
 626
 627         sealed class NullReportPrinter : ReportPrinter
 628         {
 629         }
 630
 631         //
 632         // Default message recorder, it uses two types of message groups.
 633         // Common messages: messages reported in all sessions.
 634         // Merged messages: union of all messages in all sessions.
 635         //
 636         // Used by the Lambda expressions to compile the code with various
 637         // parameter values, or by attribute resolver
 638         //
 639         class SessionReportPrinter : ReportPrinter
 640         {
 641                 List<AbstractMessage> session_messages;
 642                 //
 643                 // A collection of exactly same messages reported in all sessions
 644                 //
 645                 List<AbstractMessage> common_messages;
 646
 647                 //
 648                 // A collection of unique messages reported in all sessions
 649                 //
 650                 List<AbstractMessage> merged_messages;
 651
 652                 bool showFullPaths;
 653
 654                 public void ClearSession ()
 655                 {
 656                         session_messages = null;
 657                 }
 658
 659                 public override void Print (AbstractMessage msg, bool showFullPath)
 660                 {
 661                         //
 662                         // This line is useful when debugging recorded messages
 663                         //
 664                         // Console.WriteLine ("RECORDING: {0}", msg.Text);
 665
 666                         if (session_messages == null)
 667                                 session_messages = new List<AbstractMessage> ();
 668
 669                         session_messages.Add (msg);
 670
 671                         this.showFullPaths = showFullPath;
 672                         base.Print (msg, showFullPath);
 673                 }
 674
 675                 public void EndSession ()
 676                 {
 677                         if (session_messages == null)
 678                                 return;
 679
 680                         //
 681                         // Handles the first session
 682                         //
 683                         if (common_messages == null) {
 684                                 common_messages = new List<AbstractMessage> (session_messages);
 685                                 merged_messages = session_messages;
 686                                 session_messages = null;
 687                                 return;
 688                         }
 689
 690                         //
 691                         // Store common messages if any
 692                         //
 693                         for (int i = 0; i < common_messages.Count; ++i) {
 694                                 AbstractMessage cmsg = common_messages[i];
 695                                 bool common_msg_found = false;
 696                                 foreach (AbstractMessage msg in session_messages) {
 697                                         if (cmsg.Equals (msg)) {
 698                                                 common_msg_found = true;
 699                                                 break;
 700                                         }
 701                                 }
 702
 703                                 if (!common_msg_found)
 704                                         common_messages.RemoveAt (i);
 705                         }
 706
 707                         //
 708                         // Merge session and previous messages
 709                         //
 710                         for (int i = 0; i < session_messages.Count; ++i) {
 711                                 AbstractMessage msg = session_messages[i];
 712                                 bool msg_found = false;
 713                                 for (int ii = 0; ii < merged_messages.Count; ++ii) {
 714                                         if (msg.Equals (merged_messages[ii])) {
 715                                                 msg_found = true;
 716                                                 break;
 717                                         }
 718                                 }
 719
 720                                 if (!msg_found)
 721                                         merged_messages.Add (msg);
 722                         }
 723                 }
 724
 725                 public bool IsEmpty {
 726                         get {
 727                                 return merged_messages == null && common_messages == null;
 728                         }
 729                 }
 730
 731                 //
 732                 // Prints collected messages, common messages have a priority
 733                 //
 734                 public bool Merge (ReportPrinter dest)
 735                 {
 736                         var messages_to_print = merged_messages;
 737                         if (common_messages != null && common_messages.Count > 0) {
 738                                 messages_to_print = common_messages;
 739                         }
 740
 741                         if (messages_to_print == null)
 742                                 return false;
 743
 744                         bool error_msg = false;
 745                         foreach (AbstractMessage msg in messages_to_print) {
 746                                 dest.Print (msg, showFullPaths);
 747                                 error_msg |= !msg.IsWarning;
 748                         }
 749
 750                         if (reported_missing_definitions != null) {
 751                                 foreach (var missing in reported_missing_definitions)
 752                                         dest.MissingTypeReported (missing);
 753                         }
 754
 755                         return error_msg;
 756                 }
 757         }
 758
 759         public class StreamReportPrinter : ReportPrinter
 760         {
 761                 readonly TextWriter writer;
 762
 763                 public StreamReportPrinter (TextWriter writer)
 764                 {
 765                         this.writer = writer;
 766                 }
 767
 768                 public override void Print (AbstractMessage msg, bool showFullPath)
 769                 {
 770                         Print (msg, writer, showFullPath);
 771                         base.Print (msg, showFullPath);
 772                 }
 773         }
 774
 775         public class ConsoleReportPrinter : StreamReportPrinter
 776         {
 777                 static readonly string prefix, postfix;
 778
 779                 static ConsoleReportPrinter ()
 780                 {
 781                         string term = Environment.GetEnvironmentVariable ("TERM");
 782                         bool xterm_colors = false;
 783
 784                         switch (term){
 785                         case "xterm":
 786                         case "rxvt":
 787                         case "rxvt-unicode":
 788                                 if (Environment.GetEnvironmentVariable ("COLORTERM") != null){
 789                                         xterm_colors = true;
 790                                 }
 791                                 break;
 792
 793                         case "xterm-color":
 794                         case "xterm-256color":
 795                                 xterm_colors = true;
 796                                 break;
 797                         }
 798                         if (!xterm_colors)
 799                                 return;
 800
 801                         if (!(UnixUtils.isatty (1) && UnixUtils.isatty (2)))
 802                                 return;
 803
 804                         string config = Environment.GetEnvironmentVariable ("MCS_COLORS");
 805                         if (config == null){
 806                                 config = "errors=red";
 807                                 //config = "brightwhite,red";
 808                         }
 809
 810                         if (config == "disable")
 811                                 return;
 812
 813                         if (!config.StartsWith ("errors="))
 814                                 return;
 815
 816                         config = config.Substring (7);
 817
 818                         int p = config.IndexOf (",");
 819                         if (p == -1)
 820                                 prefix = GetForeground (config);
 821                         else
 822                                 prefix = GetBackground (config.Substring (p+1)) + GetForeground (config.Substring (0, p));
 823                         postfix = "\x001b[0m";
 824                 }
 825
 826                 public ConsoleReportPrinter ()
 827                         : base (Console.Error)
 828                 {
 829                 }
 830
 831                 public ConsoleReportPrinter (TextWriter writer)
 832                         : base (writer)
 833                 {
 834                 }
 835
 836                 static int NameToCode (string s)
 837                 {
 838                         switch (s) {
 839                         case "black":
 840                                 return 0;
 841                         case "red":
 842                                 return 1;
 843                         case "green":
 844                                 return 2;
 845                         case "yellow":
 846                                 return 3;
 847                         case "blue":
 848                                 return 4;
 849                         case "magenta":
 850                                 return 5;
 851                         case "cyan":
 852                                 return 6;
 853                         case "grey":
 854                         case "white":
 855                                 return 7;
 856                         }
 857                         return 7;
 858                 }
 859
 860                 //
 861                 // maps a color name to its xterm color code
 862                 //
 863                 static string GetForeground (string s)
 864                 {
 865                         string highcode;
 866
 867                         if (s.StartsWith ("bright")) {
 868                                 highcode = "1;";
 869                                 s = s.Substring (6);
 870                         } else
 871                                 highcode = "";
 872
 873                         return "\x001b[" + highcode + (30 + NameToCode (s)).ToString () + "m";
 874                 }
 875
 876                 static string GetBackground (string s)
 877                 {
 878                         return "\x001b[" + (40 + NameToCode (s)).ToString () + "m";
 879                 }
 880
 881                 protected override string FormatText (string txt)
 882                 {
 883                         if (prefix != null)
 884                                 return prefix + txt + postfix;
 885
 886                         return txt;
 887                 }
 888         }
 889
 890         class TimeReporter
 891         {
 892                 public enum TimerType
 893                 {
 894                         ParseTotal,
 895                         AssemblyBuilderSetup,
 896                         CreateTypeTotal,
 897                         ReferencesLoading,
 898                         ReferencesImporting,
 899                         PredefinedTypesInit,
 900                         ModuleDefinitionTotal,
 901                         EmitTotal,
 902                         CloseTypes,
 903                         Resouces,
 904                         OutputSave,
 905                         DebugSave,
 906                 }
 907
 908                 readonly Stopwatch[] timers;
 909                 Stopwatch total;
 910
 911                 public TimeReporter (bool enabled)
 912                 {
 913                         if (!enabled)
 914                                 return;
 915
 916                         timers = new Stopwatch[System.Enum.GetValues(typeof (TimerType)).Length];
 917                 }
 918
 919                 public void Start (TimerType type)
 920                 {
 921                         if (timers != null) {
 922                                 var sw = new Stopwatch ();
 923                                 timers[(int) type] = sw;
 924                                 sw.Start ();
 925                         }
 926                 }
 927
 928                 public void StartTotal ()
 929                 {
 930                         total = new Stopwatch ();
 931                         total.Start ();
 932                 }
 933
 934                 public void Stop (TimerType type)
 935                 {
 936                         if (timers != null) {
 937                                 timers[(int) type].Stop ();
 938                         }
 939                 }
 940
 941                 public void StopTotal ()
 942                 {
 943                         total.Stop ();
 944                 }
 945
 946                 public void ShowStats ()
 947                 {
 948                         if (timers == null)
 949                                 return;
 950
 951                         Dictionary<TimerType, string> timer_names = new Dictionary<TimerType,string> {
 952                                 { TimerType.ParseTotal, "Parsing source files" },
 953                                 { TimerType.AssemblyBuilderSetup, "Assembly builder setup" },
 954                                 { TimerType.CreateTypeTotal, "Compiled types created" },
 955                                 { TimerType.ReferencesLoading, "Referenced assemblies loading" },
 956                                 { TimerType.ReferencesImporting, "Referenced assemblies importing" },
 957                                 { TimerType.PredefinedTypesInit, "Predefined types initialization" },
 958                                 { TimerType.ModuleDefinitionTotal, "Module definition" },
 959                                 { TimerType.EmitTotal, "Resolving and emitting members blocks" },
 960                                 { TimerType.CloseTypes, "Module types closed" },
 961                                 { TimerType.Resouces, "Embedding resources" },
 962                                 { TimerType.OutputSave, "Writing output file" },
 963                                 { TimerType.DebugSave, "Writing debug symbols file" },
 964                         };
 965
 966                         int counter = 0;
 967                         double percentage = (double) total.ElapsedMilliseconds / 100;
 968                         long subtotal = total.ElapsedMilliseconds;
 969                         foreach (var timer in timers) {
 970                                 string msg = timer_names[(TimerType) counter++];
 971                                 var ms = timer == null ? 0 : timer.ElapsedMilliseconds;
 972                                 Console.WriteLine ("{0,4:0.0}% {1,5}ms {2}", ms / percentage, ms, msg);
 973                                 subtotal -= ms;
 974                         }
 975
 976                         Console.WriteLine ("{0,4:0.0}% {1,5}ms Other tasks", subtotal / percentage, subtotal);
 977                         Console.WriteLine ();
 978                         Console.WriteLine ("Total elapsed time: {0}", total.Elapsed);
 979                 }
 980         }
 981
 982         public class InternalErrorException : Exception {
 983                 public InternalErrorException (MemberCore mc, Exception e)
 984                         : base (mc.Location + " " + mc.GetSignatureForError (), e)
 985                 {
 986                 }
 987
 988                 public InternalErrorException ()
 989                         : base ("Internal error")
 990                 {
 991                 }
 992
 993                 public InternalErrorException (string message)
 994                         : base (message)
 995                 {
 996                 }
 997
 998                 public InternalErrorException (string message, params object[] args)
 999                         : base (String.Format (message, args))
1000                 {
1001                 }
1002
1003                 public InternalErrorException (Exception exception, string message, params object[] args)
1004                         : base (String.Format (message, args), exception)
1005                 {
1006                 }
1007
1008                 public InternalErrorException (Exception e, Location loc)
1009                         : base (loc.ToString (), e)
1010                 {
1011                 }
1012         }
1013
1014         class FatalException : Exception
1015         {
1016                 public FatalException (string message)
1017                         : base (message)
1018                 {
1019                 }
1020         }
1021
1022         /// <summary>
1023         /// Handles #pragma warning
1024         /// </summary>
1025         public class WarningRegions {
1026
1027                 abstract class PragmaCmd
1028                 {
1029                         public int Line;
1030
1031                         protected PragmaCmd (int line)
1032                         {
1033                                 Line = line;
1034                         }
1035
1036                         public abstract bool IsEnabled (int code, bool previous);
1037                 }
1038
1039                 class Disable : PragmaCmd
1040                 {
1041                         int code;
1042                         public Disable (int line, int code)
1043                                 : base (line)
1044                         {
1045                                 this.code = code;
1046                         }
1047
1048                         public override bool IsEnabled (int code, bool previous)
1049                         {
1050                                 return this.code != code && previous;
1051                         }
1052                 }
1053
1054                 class DisableAll : PragmaCmd
1055                 {
1056                         public DisableAll (int line)
1057                                 : base (line) {}
1058
1059                         public override bool IsEnabled(int code, bool previous)
1060                         {
1061                                 return false;
1062                         }
1063                 }
1064
1065                 class Enable : PragmaCmd
1066                 {
1067                         int code;
1068                         public Enable (int line, int code)
1069                                 : base (line)
1070                         {
1071                                 this.code = code;
1072                         }
1073
1074                         public override bool IsEnabled(int code, bool previous)
1075                         {
1076                                 return this.code == code || previous;
1077                         }
1078                 }
1079
1080                 class EnableAll : PragmaCmd
1081                 {
1082                         public EnableAll (int line)
1083                                 : base (line) {}
1084
1085                         public override bool IsEnabled(int code, bool previous)
1086                         {
1087                                 return true;
1088                         }
1089                 }
1090
1091
1092                 List<PragmaCmd> regions = new List<PragmaCmd> ();
1093
1094                 public void WarningDisable (int line)
1095                 {
1096                         regions.Add (new DisableAll (line));
1097                 }
1098
1099                 public void WarningDisable (Location location, int code, Report Report)
1100                 {
1101                         regions.Add (new Disable (location.Row, code));
1102                 }
1103
1104                 public void WarningEnable (int line)
1105                 {
1106                         regions.Add (new EnableAll (line));
1107                 }
1108
1109                 public void WarningEnable (Location location, int code, CompilerContext context)
1110                 {
1111                         if (context.Settings.IsWarningDisabledGlobally (code))
1112                                 context.Report.Warning (1635, 1, location, "Cannot restore warning `CS{0:0000}' because it was disabled globally", code);
1113
1114                         regions.Add (new Enable (location.Row, code));
1115                 }
1116
1117                 public bool IsWarningEnabled (int code, int src_line)
1118                 {
1119                         bool result = true;
1120                         foreach (PragmaCmd pragma in regions) {
1121                                 if (src_line < pragma.Line)
1122                                         break;
1123
1124                                 result = pragma.IsEnabled (code, result);
1125                         }
1126                         return result;
1127                 }
1128         }
1129 }