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                 /// <summary>
  25                 ///   Whether warnings should be considered errors
  26                 /// </summary>
  27                 public bool WarningsAreErrors;
  28                 List<int> warnings_as_error;
  29                 List<int> warnings_only;
  30
  31                 public const int RuntimeErrorId = 10000;
  32
  33                 //
  34                 // Keeps track of the warnings that we are ignoring
  35                 //
  36                 HashSet<int> warning_ignore_table;
  37
  38                 Dictionary<int, WarningRegions> warning_regions_table;
  39
  40                 int warning_level;
  41
  42                 ReportPrinter printer;
  43
  44                 int reporting_disabled;
  45
  46                 /// <summary>
  47                 /// List of symbols related to reported error/warning. You have to fill it before error/warning is reported.
  48                 /// </summary>
  49                 List<string> extra_information = new List<string> ();
  50
  51                 //
  52                 // IF YOU ADD A NEW WARNING YOU HAVE TO ADD ITS ID HERE
  53                 //
  54                 public static readonly int[] AllWarnings = new int[] {
  55                         28, 67, 78,
  56                         105, 108, 109, 114, 162, 164, 168, 169, 183, 184, 197,
  57                         219, 251, 252, 253, 278, 282,
  58                         402, 414, 419, 420, 429, 436, 437, 440, 458, 464, 465, 467, 469, 472, 473,
  59                         612, 618, 626, 628, 642, 649, 652, 657, 658, 659, 660, 661, 665, 672, 675, 693,
  60                         728,
  61                         809, 824,
  62                         1030, 1058, 1060, 1066,
  63                         1522, 1570, 1571, 1572, 1573, 1574, 1580, 1581, 1584, 1587, 1589, 1590, 1591, 1592,
  64                         1607, 1616, 1633, 1634, 1635, 1685, 1690, 1691, 1692, 1695, 1696, 1699,
  65                         1700, 1701, 1702, 1709, 1711, 1717, 1718, 1720, 1735,
  66                         1901, 1956, 1981, 1998,
  67                         2002, 2023, 2029,
  68                         3000, 3001, 3002, 3003, 3005, 3006, 3007, 3008, 3009,
  69                         3010, 3011, 3012, 3013, 3014, 3015, 3016, 3017, 3018, 3019,
  70                         3021, 3022, 3023, 3024, 3026, 3027
  71                 };
  72
  73                 static HashSet<int> AllWarningsHashSet;
  74
  75                 public Report (ReportPrinter printer)
  76                 {
  77                         if (printer == null)
  78                                 throw new ArgumentNullException ("printer");
  79
  80                         this.printer = printer;
  81                         warning_level = 4;
  82                 }
  83
  84                 public void DisableReporting ()
  85                 {
  86                         ++reporting_disabled;
  87                 }
  88
  89                 public void EnableReporting ()
  90                 {
  91                         --reporting_disabled;
  92                 }
  93
  94                 public void FeatureIsNotAvailable (CompilerContext compiler, Location loc, string feature)
  95                 {
  96                         string version;
  97                         switch (compiler.Settings.Version) {
  98                         case LanguageVersion.ISO_1:
  99                                 version = "1.0";
 100                                 break;
 101                         case LanguageVersion.ISO_2:
 102                                 version = "2.0";
 103                                 break;
 104                         case LanguageVersion.V_3:
 105                                 version = "3.0";
 106                                 break;
 107                         case LanguageVersion.V_4:
 108                                 version = "4.0";
 109                                 break;
 110                         case LanguageVersion.V_5:
 111                                 version = "5.0";
 112                                 break;
 113                         default:
 114                                 throw new InternalErrorException ("Invalid feature version", compiler.Settings.Version);
 115                         }
 116
 117                         Error (1644, loc,
 118                                 "Feature `{0}' cannot be used because it is not part of the C# {1} language specification",
 119                                       feature, version);
 120                 }
 121
 122                 public void FeatureIsNotSupported (Location loc, string feature)
 123                 {
 124                         Error (1644, loc,
 125                                 "Feature `{0}' is not supported in Mono mcs1 compiler. Consider using the `gmcs' compiler instead",
 126                                 feature);
 127                 }
 128
 129                 bool IsWarningEnabled (int code, int level, Location loc)
 130                 {
 131                         if (WarningLevel < level)
 132                                 return false;
 133
 134                         if (IsWarningDisabledGlobally (code))
 135                                 return false;
 136
 137                         if (warning_regions_table == null || loc.IsNull)
 138                                 return true;
 139
 140                         WarningRegions regions;
 141                         if (!warning_regions_table.TryGetValue (loc.File, out regions))
 142                                 return true;
 143
 144                         return regions.IsWarningEnabled (code, loc.Row);
 145                 }
 146
 147                 public bool IsWarningDisabledGlobally (int code)
 148                 {
 149                         return warning_ignore_table != null && warning_ignore_table.Contains (code);
 150                 }
 151
 152                 bool IsWarningAsError (int code)
 153                 {
 154                         bool is_error = WarningsAreErrors;
 155
 156                         // Check specific list
 157                         if (warnings_as_error != null)
 158                                 is_error |= warnings_as_error.Contains (code);
 159
 160                         // Ignore excluded warnings
 161                         if (warnings_only != null && warnings_only.Contains (code))
 162                                 is_error = false;
 163
 164                         return is_error;
 165                 }
 166
 167                 public void RuntimeMissingSupport (Location loc, string feature)
 168                 {
 169                         Error (-88, loc, "Your .NET Runtime does not support `{0}'. Please use the latest Mono runtime instead.", feature);
 170                 }
 171
 172                 /// <summary>
 173                 /// In most error cases is very useful to have information about symbol that caused the error.
 174                 /// Call this method before you call Report.Error when it makes sense.
 175                 /// </summary>
 176                 public void SymbolRelatedToPreviousError (Location loc, string symbol)
 177                 {
 178                         SymbolRelatedToPreviousError (loc.ToString ());
 179                 }
 180
 181                 public void SymbolRelatedToPreviousError (MemberSpec ms)
 182                 {
 183                         if (reporting_disabled > 0 || !printer.HasRelatedSymbolSupport)
 184                                 return;
 185
 186                         var mc = ms.MemberDefinition as MemberCore;
 187                         while (ms is ElementTypeSpec) {
 188                                 ms = ((ElementTypeSpec) ms).Element;
 189                                 mc = ms.MemberDefinition as MemberCore;
 190                         }
 191
 192                         if (mc != null) {
 193                                 SymbolRelatedToPreviousError (mc);
 194                         } else {
 195                                 if (ms.DeclaringType != null)
 196                                         ms = ms.DeclaringType;
 197
 198                                 var imported_type = ms.MemberDefinition as ImportedTypeDefinition;
 199                                 if (imported_type != null) {
 200                                         var iad = imported_type.DeclaringAssembly as ImportedAssemblyDefinition;
 201                                         SymbolRelatedToPreviousError (iad.Location);
 202                                 }
 203                         }
 204                 }
 205
 206                 public void SymbolRelatedToPreviousError (MemberCore mc)
 207                 {
 208                         SymbolRelatedToPreviousError (mc.Location, mc.GetSignatureForError ());
 209                 }
 210
 211                 public void SymbolRelatedToPreviousError (string loc)
 212                 {
 213                         string msg = String.Format ("{0} (Location of the symbol related to previous ", loc);
 214                         if (extra_information.Contains (msg))
 215                                 return;
 216
 217                         extra_information.Add (msg);
 218                 }
 219
 220                 public void AddWarningAsError (string warningId)
 221                 {
 222                         int id;
 223                         try {
 224                                 id = int.Parse (warningId);
 225                         } catch {
 226                                 CheckWarningCode (warningId, Location.Null);
 227                                 return;
 228                         }
 229
 230                         if (!CheckWarningCode (id, Location.Null))
 231                                 return;
 232
 233                         if (warnings_as_error == null)
 234                                 warnings_as_error = new List<int> ();
 235
 236                         warnings_as_error.Add (id);
 237                 }
 238
 239                 public void RemoveWarningAsError (string warningId)
 240                 {
 241                         int id;
 242                         try {
 243                                 id = int.Parse (warningId);
 244                         } catch {
 245                                 CheckWarningCode (warningId, Location.Null);
 246                                 return;
 247                         }
 248
 249                         if (!CheckWarningCode (id, Location.Null))
 250                                 return;
 251
 252                         if (warnings_only == null)
 253                                 warnings_only = new List<int> ();
 254
 255                         warnings_only.Add (id);
 256                 }
 257
 258                 public bool CheckWarningCode (string code, Location loc)
 259                 {
 260                         Warning (1691, 1, loc, "`{0}' is not a valid warning number", code);
 261                         return false;
 262                 }
 263
 264                 public bool CheckWarningCode (int code, Location loc)
 265                 {
 266                         if (AllWarningsHashSet == null)
 267                                 AllWarningsHashSet = new HashSet<int> (AllWarnings);
 268
 269                         if (AllWarningsHashSet.Contains (code))
 270                                 return true;
 271
 272                         return CheckWarningCode (code.ToString (), loc);
 273                 }
 274
 275                 public void ExtraInformation (Location loc, string msg)
 276                 {
 277                         extra_information.Add (String.Format ("{0} {1}", loc, msg));
 278                 }
 279
 280                 public WarningRegions RegisterWarningRegion (Location location)
 281                 {
 282                         WarningRegions regions;
 283                         if (warning_regions_table == null) {
 284                                 regions = null;
 285                                 warning_regions_table = new Dictionary<int, WarningRegions> ();
 286                         } else {
 287                                 warning_regions_table.TryGetValue (location.File, out regions);
 288                         }
 289
 290                         if (regions == null) {
 291                                 regions = new WarningRegions ();
 292                                 warning_regions_table.Add (location.File, regions);
 293                         }
 294
 295                         return regions;
 296                 }
 297
 298                 public void Warning (int code, int level, Location loc, string message)
 299                 {
 300                         if (reporting_disabled > 0)
 301                                 return;
 302
 303                         if (!IsWarningEnabled (code, level, loc))
 304                                 return;
 305
 306                         AbstractMessage msg;
 307                         if (IsWarningAsError (code)) {
 308                                 message = "Warning as Error: " + message;
 309                                 msg = new ErrorMessage (code, loc, message, extra_information);
 310                         } else {
 311                                 msg = new WarningMessage (code, loc, message, extra_information);
 312                         }
 313
 314                         extra_information.Clear ();
 315                         printer.Print (msg);
 316                 }
 317
 318                 public void Warning (int code, int level, Location loc, string format, string arg)
 319                 {
 320                         Warning (code, level, loc, String.Format (format, arg));
 321                 }
 322
 323                 public void Warning (int code, int level, Location loc, string format, string arg1, string arg2)
 324                 {
 325                         Warning (code, level, loc, String.Format (format, arg1, arg2));
 326                 }
 327
 328                 public void Warning (int code, int level, Location loc, string format, params object[] args)
 329                 {
 330                         Warning (code, level, loc, String.Format (format, args));
 331                 }
 332
 333                 public void Warning (int code, int level, string message)
 334                 {
 335                         Warning (code, level, Location.Null, message);
 336                 }
 337
 338                 public void Warning (int code, int level, string format, string arg)
 339                 {
 340                         Warning (code, level, Location.Null, format, arg);
 341                 }
 342
 343                 public void Warning (int code, int level, string format, string arg1, string arg2)
 344                 {
 345                         Warning (code, level, Location.Null, format, arg1, arg2);
 346                 }
 347
 348                 public void Warning (int code, int level, string format, params string[] args)
 349                 {
 350                         Warning (code, level, Location.Null, String.Format (format, args));
 351                 }
 352
 353                 //
 354                 // Warnings encountered so far
 355                 //
 356                 public int Warnings {
 357                         get { return printer.WarningsCount; }
 358                 }
 359
 360                 public void Error (int code, Location loc, string error)
 361                 {
 362                         if (reporting_disabled > 0)
 363                                 return;
 364
 365                         ErrorMessage msg = new ErrorMessage (code, loc, error, extra_information);
 366                         extra_information.Clear ();
 367
 368                         printer.Print (msg);
 369                 }
 370
 371                 public void Error (int code, Location loc, string format, string arg)
 372                 {
 373                         Error (code, loc, String.Format (format, arg));
 374                 }
 375
 376                 public void Error (int code, Location loc, string format, string arg1, string arg2)
 377                 {
 378                         Error (code, loc, String.Format (format, arg1, arg2));
 379                 }
 380
 381                 public void Error (int code, Location loc, string format, params string[] args)
 382                 {
 383                         Error (code, loc, String.Format (format, args));
 384                 }
 385
 386                 public void Error (int code, string error)
 387                 {
 388                         Error (code, Location.Null, error);
 389                 }
 390
 391                 public void Error (int code, string format, string arg)
 392                 {
 393                         Error (code, Location.Null, format, arg);
 394                 }
 395
 396                 public void Error (int code, string format, string arg1, string arg2)
 397                 {
 398                         Error (code, Location.Null, format, arg1, arg2);
 399                 }
 400
 401                 public void Error (int code, string format, params string[] args)
 402                 {
 403                         Error (code, Location.Null, String.Format (format, args));
 404                 }
 405
 406                 //
 407                 // Errors encountered so far
 408                 //
 409                 public int Errors {
 410                         get { return printer.ErrorsCount; }
 411                 }
 412
 413                 public bool IsDisabled {
 414                         get {
 415                                 return reporting_disabled > 0;
 416                         }
 417                 }
 418
 419                 public ReportPrinter Printer {
 420                         get { return printer; }
 421                 }
 422
 423                 public void SetIgnoreWarning (int code)
 424                 {
 425                         if (warning_ignore_table == null)
 426                                 warning_ignore_table = new HashSet<int> ();
 427
 428                         warning_ignore_table.Add (code);
 429                 }
 430
 431                 public ReportPrinter SetPrinter (ReportPrinter printer)
 432                 {
 433                         ReportPrinter old = this.printer;
 434                         this.printer = printer;
 435                         return old;
 436                 }
 437
 438                 public int WarningLevel {
 439                         get {
 440                                 return warning_level;
 441                         }
 442                         set {
 443                                 warning_level = value;
 444                         }
 445                 }
 446
 447                 [Conditional ("MCS_DEBUG")]
 448                 static public void Debug (string message, params object[] args)
 449                 {
 450                         Debug (4, message, args);
 451                 }
 452
 453                 [Conditional ("MCS_DEBUG")]
 454                 static public void Debug (int category, string message, params object[] args)
 455                 {
 456 //                      if ((category & DebugFlags) == 0)
 457 //                              return;
 458
 459                         StringBuilder sb = new StringBuilder (message);
 460
 461                         if ((args != null) && (args.Length > 0)) {
 462                                 sb.Append (": ");
 463
 464                                 bool first = true;
 465                                 foreach (object arg in args) {
 466                                         if (first)
 467                                                 first = false;
 468                                         else
 469                                                 sb.Append (", ");
 470                                         if (arg == null)
 471                                                 sb.Append ("null");
 472 //                                      else if (arg is ICollection)
 473 //                                              sb.Append (PrintCollection ((ICollection) arg));
 474                                         else
 475                                                 sb.Append (arg);
 476                                 }
 477                         }
 478
 479                         Console.WriteLine (sb.ToString ());
 480                 }
 481 /*
 482                 static public string PrintCollection (ICollection collection)
 483                 {
 484                         StringBuilder sb = new StringBuilder ();
 485
 486                         sb.Append (collection.GetType ());
 487                         sb.Append ("(");
 488
 489                         bool first = true;
 490                         foreach (object o in collection) {
 491                                 if (first)
 492                                         first = false;
 493                                 else
 494                                         sb.Append (", ");
 495                                 sb.Append (o);
 496                         }
 497
 498                         sb.Append (")");
 499                         return sb.ToString ();
 500                 }
 501 */
 502         }
 503
 504         public abstract class AbstractMessage
 505         {
 506                 readonly string[] extra_info;
 507                 protected readonly int code;
 508                 protected readonly Location location;
 509                 readonly string message;
 510
 511                 protected AbstractMessage (int code, Location loc, string msg, List<string> extraInfo)
 512                 {
 513                         this.code = code;
 514                         if (code < 0)
 515                                 this.code = 8000 - code;
 516
 517                         this.location = loc;
 518                         this.message = msg;
 519                         if (extraInfo.Count != 0) {
 520                                 this.extra_info = extraInfo.ToArray ();
 521                         }
 522                 }
 523
 524                 protected AbstractMessage (AbstractMessage aMsg)
 525                 {
 526                         this.code = aMsg.code;
 527                         this.location = aMsg.location;
 528                         this.message = aMsg.message;
 529                         this.extra_info = aMsg.extra_info;
 530                 }
 531
 532                 public int Code {
 533                         get { return code; }
 534                 }
 535
 536                 public override bool Equals (object obj)
 537                 {
 538                         AbstractMessage msg = obj as AbstractMessage;
 539                         if (msg == null)
 540                                 return false;
 541
 542                         return code == msg.code && location.Equals (msg.location) && message == msg.message;
 543                 }
 544
 545                 public override int GetHashCode ()
 546                 {
 547                         return code.GetHashCode ();
 548                 }
 549
 550                 public abstract bool IsWarning { get; }
 551
 552                 public Location Location {
 553                         get { return location; }
 554                 }
 555
 556                 public abstract string MessageType { get; }
 557
 558                 public string[] RelatedSymbols {
 559                         get { return extra_info; }
 560                 }
 561
 562                 public string Text {
 563                         get { return message; }
 564                 }
 565         }
 566
 567         sealed class WarningMessage : AbstractMessage
 568         {
 569                 public WarningMessage (int code, Location loc, string message, List<string> extra_info)
 570                         : base (code, loc, message, extra_info)
 571                 {
 572                 }
 573
 574                 public override bool IsWarning {
 575                         get { return true; }
 576                 }
 577
 578                 public override string MessageType {
 579                         get {
 580                                 return "warning";
 581                         }
 582                 }
 583         }
 584
 585         sealed class ErrorMessage : AbstractMessage
 586         {
 587                 public ErrorMessage (int code, Location loc, string message, List<string> extraInfo)
 588                         : base (code, loc, message, extraInfo)
 589                 {
 590                 }
 591
 592                 public ErrorMessage (AbstractMessage aMsg)
 593                         : base (aMsg)
 594                 {
 595                 }
 596
 597                 public override bool IsWarning {
 598                         get { return false; }
 599                 }
 600
 601                 public override string MessageType {
 602                         get {
 603                                 return "error";
 604                         }
 605                 }
 606         }
 607
 608         //
 609         // Generic base for any message writer
 610         //
 611         public abstract class ReportPrinter
 612         {
 613                 #region Properties
 614
 615                 public int FatalCounter { get; set; }
 616
 617                 public int ErrorsCount { get; protected set; }
 618
 619                 public bool ShowFullPaths { get; set; }
 620
 621                 //
 622                 // Whether to dump a stack trace on errors.
 623                 //
 624                 public bool Stacktrace { get; set; }
 625
 626                 public int WarningsCount { get; private set; }
 627
 628                 //
 629                 // When (symbols related to previous ...) can be used
 630                 //
 631                 public virtual bool HasRelatedSymbolSupport {
 632                         get { return true; }
 633                 }
 634
 635                 #endregion
 636
 637
 638                 protected virtual string FormatText (string txt)
 639                 {
 640                         return txt;
 641                 }
 642
 643                 public virtual void Print (AbstractMessage msg)
 644                 {
 645                         if (msg.IsWarning) {
 646                                 ++WarningsCount;
 647                         } else {
 648                                 ++ErrorsCount;
 649
 650                                 if (ErrorsCount == FatalCounter)
 651                                         throw new Exception (msg.Text);
 652                         }
 653                 }
 654
 655                 protected void Print (AbstractMessage msg, TextWriter output)
 656                 {
 657                         StringBuilder txt = new StringBuilder ();
 658                         if (!msg.Location.IsNull) {
 659                                 if (ShowFullPaths)
 660                                         txt.Append (msg.Location.ToStringFullName ());
 661                                 else
 662                                         txt.Append (msg.Location.ToString ());
 663
 664                                 txt.Append (" ");
 665                         }
 666
 667                         txt.AppendFormat ("{0} CS{1:0000}: {2}", msg.MessageType, msg.Code, msg.Text);
 668
 669                         if (!msg.IsWarning)
 670                                 output.WriteLine (FormatText (txt.ToString ()));
 671                         else
 672                                 output.WriteLine (txt.ToString ());
 673
 674                         if (msg.RelatedSymbols != null) {
 675                                 foreach (string s in msg.RelatedSymbols)
 676                                         output.WriteLine (s + msg.MessageType + ")");
 677                         }
 678                 }
 679
 680                 public void Reset ()
 681                 {
 682                         // HACK: Temporary hack for broken repl flow
 683                         ErrorsCount = WarningsCount = 0;
 684                 }
 685         }
 686
 687         sealed class NullReportPrinter : ReportPrinter
 688         {
 689         }
 690
 691         //
 692         // Default message recorder, it uses two types of message groups.
 693         // Common messages: messages reported in all sessions.
 694         // Merged messages: union of all messages in all sessions.
 695         //
 696         // Used by the Lambda expressions to compile the code with various
 697         // parameter values, or by attribute resolver
 698         //
 699         class SessionReportPrinter : ReportPrinter
 700         {
 701                 List<AbstractMessage> session_messages;
 702                 //
 703                 // A collection of exactly same messages reported in all sessions
 704                 //
 705                 List<AbstractMessage> common_messages;
 706
 707                 //
 708                 // A collection of unique messages reported in all sessions
 709                 //
 710                 List<AbstractMessage> merged_messages;
 711
 712                 public override void Print (AbstractMessage msg)
 713                 {
 714                         //
 715                         // This line is useful when debugging recorded messages
 716                         //
 717                         // Console.WriteLine ("RECORDING: {0}", msg.ToString ());
 718
 719                         if (session_messages == null)
 720                                 session_messages = new List<AbstractMessage> ();
 721
 722                         session_messages.Add (msg);
 723
 724                         base.Print (msg);
 725                 }
 726
 727                 public void EndSession ()
 728                 {
 729                         if (session_messages == null)
 730                                 return;
 731
 732                         //
 733                         // Handles the first session
 734                         //
 735                         if (common_messages == null) {
 736                                 common_messages = new List<AbstractMessage> (session_messages);
 737                                 merged_messages = session_messages;
 738                                 session_messages = null;
 739                                 return;
 740                         }
 741
 742                         //
 743                         // Store common messages if any
 744                         //
 745                         for (int i = 0; i < common_messages.Count; ++i) {
 746                                 AbstractMessage cmsg = common_messages[i];
 747                                 bool common_msg_found = false;
 748                                 foreach (AbstractMessage msg in session_messages) {
 749                                         if (cmsg.Equals (msg)) {
 750                                                 common_msg_found = true;
 751                                                 break;
 752                                         }
 753                                 }
 754
 755                                 if (!common_msg_found)
 756                                         common_messages.RemoveAt (i);
 757                         }
 758
 759                         //
 760                         // Merge session and previous messages
 761                         //
 762                         for (int i = 0; i < session_messages.Count; ++i) {
 763                                 AbstractMessage msg = session_messages[i];
 764                                 bool msg_found = false;
 765                                 for (int ii = 0; ii < merged_messages.Count; ++ii) {
 766                                         if (msg.Equals (merged_messages[ii])) {
 767                                                 msg_found = true;
 768                                                 break;
 769                                         }
 770                                 }
 771
 772                                 if (!msg_found)
 773                                         merged_messages.Add (msg);
 774                         }
 775                 }
 776
 777                 public bool IsEmpty {
 778                         get {
 779                                 return merged_messages == null && common_messages == null;
 780                         }
 781                 }
 782
 783                 //
 784                 // Prints collected messages, common messages have a priority
 785                 //
 786                 public bool Merge (ReportPrinter dest)
 787                 {
 788                         var messages_to_print = merged_messages;
 789                         if (common_messages != null && common_messages.Count > 0) {
 790                                 messages_to_print = common_messages;
 791                         }
 792
 793                         if (messages_to_print == null)
 794                                 return false;
 795
 796                         bool error_msg = false;
 797                         foreach (AbstractMessage msg in messages_to_print) {
 798                                 dest.Print (msg);
 799                                 error_msg |= !msg.IsWarning;
 800                         }
 801
 802                         return error_msg;
 803                 }
 804         }
 805
 806         public class StreamReportPrinter : ReportPrinter
 807         {
 808                 readonly TextWriter writer;
 809
 810                 public StreamReportPrinter (TextWriter writer)
 811                 {
 812                         this.writer = writer;
 813                 }
 814
 815                 public override void Print (AbstractMessage msg)
 816                 {
 817                         Print (msg, writer);
 818                         base.Print (msg);
 819                 }
 820         }
 821
 822         public class ConsoleReportPrinter : StreamReportPrinter
 823         {
 824                 static readonly string prefix, postfix;
 825
 826                 static ConsoleReportPrinter ()
 827                 {
 828                         string term = Environment.GetEnvironmentVariable ("TERM");
 829                         bool xterm_colors = false;
 830
 831                         switch (term){
 832                         case "xterm":
 833                         case "rxvt":
 834                         case "rxvt-unicode":
 835                                 if (Environment.GetEnvironmentVariable ("COLORTERM") != null){
 836                                         xterm_colors = true;
 837                                 }
 838                                 break;
 839
 840                         case "xterm-color":
 841                         case "xterm-256color":
 842                                 xterm_colors = true;
 843                                 break;
 844                         }
 845                         if (!xterm_colors)
 846                                 return;
 847
 848                         if (!(UnixUtils.isatty (1) && UnixUtils.isatty (2)))
 849                                 return;
 850
 851                         string config = Environment.GetEnvironmentVariable ("MCS_COLORS");
 852                         if (config == null){
 853                                 config = "errors=red";
 854                                 //config = "brightwhite,red";
 855                         }
 856
 857                         if (config == "disable")
 858                                 return;
 859
 860                         if (!config.StartsWith ("errors="))
 861                                 return;
 862
 863                         config = config.Substring (7);
 864
 865                         int p = config.IndexOf (",");
 866                         if (p == -1)
 867                                 prefix = GetForeground (config);
 868                         else
 869                                 prefix = GetBackground (config.Substring (p+1)) + GetForeground (config.Substring (0, p));
 870                         postfix = "\x001b[0m";
 871                 }
 872
 873                 public ConsoleReportPrinter ()
 874                         : base (Console.Error)
 875                 {
 876                 }
 877
 878                 public ConsoleReportPrinter (TextWriter writer)
 879                         : base (writer)
 880                 {
 881                 }
 882
 883                 static int NameToCode (string s)
 884                 {
 885                         switch (s) {
 886                         case "black":
 887                                 return 0;
 888                         case "red":
 889                                 return 1;
 890                         case "green":
 891                                 return 2;
 892                         case "yellow":
 893                                 return 3;
 894                         case "blue":
 895                                 return 4;
 896                         case "magenta":
 897                                 return 5;
 898                         case "cyan":
 899                                 return 6;
 900                         case "grey":
 901                         case "white":
 902                                 return 7;
 903                         }
 904                         return 7;
 905                 }
 906
 907                 //
 908                 // maps a color name to its xterm color code
 909                 //
 910                 static string GetForeground (string s)
 911                 {
 912                         string highcode;
 913
 914                         if (s.StartsWith ("bright")) {
 915                                 highcode = "1;";
 916                                 s = s.Substring (6);
 917                         } else
 918                                 highcode = "";
 919
 920                         return "\x001b[" + highcode + (30 + NameToCode (s)).ToString () + "m";
 921                 }
 922
 923                 static string GetBackground (string s)
 924                 {
 925                         return "\x001b[" + (40 + NameToCode (s)).ToString () + "m";
 926                 }
 927
 928                 protected override string FormatText (string txt)
 929                 {
 930                         if (prefix != null)
 931                                 return prefix + txt + postfix;
 932
 933                         return txt;
 934                 }
 935
 936                 static string FriendlyStackTrace (StackTrace t)
 937                 {
 938                         StringBuilder sb = new StringBuilder ();
 939
 940                         bool foundUserCode = false;
 941
 942                         for (int i = 0; i < t.FrameCount; i++) {
 943                                 StackFrame f = t.GetFrame (i);
 944                                 var mb = f.GetMethod ();
 945
 946                                 if (!foundUserCode && mb.ReflectedType == typeof (Report))
 947                                         continue;
 948
 949                                 foundUserCode = true;
 950
 951                                 sb.Append ("\tin ");
 952
 953                                 if (f.GetFileLineNumber () > 0)
 954                                         sb.AppendFormat ("(at {0}:{1}) ", f.GetFileName (), f.GetFileLineNumber ());
 955
 956                                 sb.AppendFormat ("{0}.{1} (", mb.ReflectedType.Name, mb.Name);
 957
 958                                 bool first = true;
 959                                 foreach (var pi in mb.GetParameters ()) {
 960                                         if (!first)
 961                                                 sb.Append (", ");
 962                                         first = false;
 963
 964                                         sb.Append (pi.ParameterType.FullName);
 965                                 }
 966                                 sb.Append (")\n");
 967                         }
 968
 969                         return sb.ToString ();
 970                 }
 971
 972                 public override void Print (AbstractMessage msg)
 973                 {
 974                         base.Print (msg);
 975
 976                         if (Stacktrace)
 977                                 Console.WriteLine (FriendlyStackTrace (new StackTrace (true)));
 978                 }
 979
 980                 public static string FriendlyStackTrace (Exception e)
 981                 {
 982                         return FriendlyStackTrace (new StackTrace (e, true));
 983                 }
 984
 985                 public static void StackTrace ()
 986                 {
 987                         Console.WriteLine (FriendlyStackTrace (new StackTrace (true)));
 988                 }
 989         }
 990
 991         class TimeReporter
 992         {
 993                 public enum TimerType
 994                 {
 995                         ParseTotal,
 996                         AssemblyBuilderSetup,
 997                         CreateTypeTotal,
 998                         ReferencesLoading,
 999                         ReferencesImporting,
1000                         PredefinedTypesInit,
1001                         ModuleDefinitionTotal,
1002                         EmitTotal,
1003                         CloseTypes,
1004                         Resouces,
1005                         OutputSave,
1006                         DebugSave,
1007                 }
1008
1009                 readonly Stopwatch[] timers;
1010                 Stopwatch total;
1011
1012                 public TimeReporter (bool enabled)
1013                 {
1014                         if (!enabled)
1015                                 return;
1016
1017                         timers = new Stopwatch[System.Enum.GetValues(typeof (TimerType)).Length];
1018                 }
1019
1020                 public void Start (TimerType type)
1021                 {
1022                         if (timers != null) {
1023                                 var sw = new Stopwatch ();
1024                                 timers[(int) type] = sw;
1025                                 sw.Start ();
1026                         }
1027                 }
1028
1029                 public void StartTotal ()
1030                 {
1031                         total = new Stopwatch ();
1032                         total.Start ();
1033                 }
1034
1035                 public void Stop (TimerType type)
1036                 {
1037                         if (timers != null) {
1038                                 timers[(int) type].Stop ();
1039                         }
1040                 }
1041
1042                 public void StopTotal ()
1043                 {
1044                         total.Stop ();
1045                 }
1046
1047                 public void ShowStats ()
1048                 {
1049                         if (timers == null)
1050                                 return;
1051
1052                         Dictionary<TimerType, string> timer_names = new Dictionary<TimerType,string> () {
1053                                 { TimerType.ParseTotal, "Parsing source files" },
1054                                 { TimerType.AssemblyBuilderSetup, "Assembly builder setup" },
1055                                 { TimerType.CreateTypeTotal, "Compiled types created" },
1056                                 { TimerType.ReferencesLoading, "Referenced assemblies loading" },
1057                                 { TimerType.ReferencesImporting, "Referenced assemblies importing" },
1058                                 { TimerType.PredefinedTypesInit, "Predefined types initialization" },
1059                                 { TimerType.ModuleDefinitionTotal, "Module definition" },
1060                                 { TimerType.EmitTotal, "Resolving and emitting members blocks" },
1061                                 { TimerType.CloseTypes, "Module types closed" },
1062                                 { TimerType.Resouces, "Embedding resources" },
1063                                 { TimerType.OutputSave, "Writing output file" },
1064                                 { TimerType.DebugSave, "Writing debug symbols file" },
1065                         };
1066
1067                         int counter = 0;
1068                         double percentage = (double) total.ElapsedMilliseconds / 100;
1069                         long subtotal = total.ElapsedMilliseconds;
1070                         foreach (var timer in timers) {
1071                                 string msg = timer_names[(TimerType) counter++];
1072                                 var ms = timer == null ? 0 : timer.ElapsedMilliseconds;
1073                                 Console.WriteLine ("{0,4:0.0}% {1,5}ms {2}", ms / percentage, ms, msg);
1074                                 subtotal -= ms;
1075                         }
1076
1077                         Console.WriteLine ("{0,4:0.0}% {1,5}ms Other tasks", subtotal / percentage, subtotal);
1078                         Console.WriteLine ();
1079                         Console.WriteLine ("Total elapsed time: {0}", total.Elapsed);
1080                 }
1081         }
1082
1083         public class InternalErrorException : Exception {
1084                 public InternalErrorException (MemberCore mc, Exception e)
1085                         : base (mc.Location + " " + mc.GetSignatureForError (), e)
1086                 {
1087                 }
1088
1089                 public InternalErrorException ()
1090                         : base ("Internal error")
1091                 {
1092                 }
1093
1094                 public InternalErrorException (string message)
1095                         : base (message)
1096                 {
1097                 }
1098
1099                 public InternalErrorException (string message, params object[] args)
1100                         : base (String.Format (message, args))
1101                 {
1102                 }
1103
1104                 public InternalErrorException (Exception exception, string message, params object[] args)
1105                         : base (String.Format (message, args), exception)
1106                 {
1107                 }
1108
1109                 public InternalErrorException (Exception e, Location loc)
1110                         : base (loc.ToString (), e)
1111                 {
1112                 }
1113         }
1114
1115         /// <summary>
1116         /// Handles #pragma warning
1117         /// </summary>
1118         public class WarningRegions {
1119
1120                 abstract class PragmaCmd
1121                 {
1122                         public int Line;
1123
1124                         protected PragmaCmd (int line)
1125                         {
1126                                 Line = line;
1127                         }
1128
1129                         public abstract bool IsEnabled (int code, bool previous);
1130                 }
1131
1132                 class Disable : PragmaCmd
1133                 {
1134                         int code;
1135                         public Disable (int line, int code)
1136                                 : base (line)
1137                         {
1138                                 this.code = code;
1139                         }
1140
1141                         public override bool IsEnabled (int code, bool previous)
1142                         {
1143                                 return this.code == code ? false : previous;
1144                         }
1145                 }
1146
1147                 class DisableAll : PragmaCmd
1148                 {
1149                         public DisableAll (int line)
1150                                 : base (line) {}
1151
1152                         public override bool IsEnabled(int code, bool previous)
1153                         {
1154                                 return false;
1155                         }
1156                 }
1157
1158                 class Enable : PragmaCmd
1159                 {
1160                         int code;
1161                         public Enable (int line, int code)
1162                                 : base (line)
1163                         {
1164                                 this.code = code;
1165                         }
1166
1167                         public override bool IsEnabled(int code, bool previous)
1168                         {
1169                                 return this.code == code ? true : previous;
1170                         }
1171                 }
1172
1173                 class EnableAll : PragmaCmd
1174                 {
1175                         public EnableAll (int line)
1176                                 : base (line) {}
1177
1178                         public override bool IsEnabled(int code, bool previous)
1179                         {
1180                                 return true;
1181                         }
1182                 }
1183
1184
1185                 List<PragmaCmd> regions = new List<PragmaCmd> ();
1186
1187                 public void WarningDisable (int line)
1188                 {
1189                         regions.Add (new DisableAll (line));
1190                 }
1191
1192                 public void WarningDisable (Location location, int code, Report Report)
1193                 {
1194                         if (Report.CheckWarningCode (code, location))
1195                                 regions.Add (new Disable (location.Row, code));
1196                 }
1197
1198                 public void WarningEnable (int line)
1199                 {
1200                         regions.Add (new EnableAll (line));
1201                 }
1202
1203                 public void WarningEnable (Location location, int code, Report Report)
1204                 {
1205                         if (!Report.CheckWarningCode (code, location))
1206                                 return;
1207
1208                         if (Report.IsWarningDisabledGlobally (code))
1209                                 Report.Warning (1635, 1, location, "Cannot restore warning `CS{0:0000}' because it was disabled globally", code);
1210
1211                         regions.Add (new Enable (location.Row, code));
1212                 }
1213
1214                 public bool IsWarningEnabled (int code, int src_line)
1215                 {
1216                         bool result = true;
1217                         foreach (PragmaCmd pragma in regions) {
1218                                 if (src_line < pragma.Line)
1219                                         break;
1220
1221                                 result = pragma.IsEnabled (code, result);
1222                         }
1223                         return result;
1224                 }
1225         }
1226 }