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                 static HashSet<int> AllWarningsHashSet;
  65
  66                 public Report (CompilerContext context, ReportPrinter printer)
  67                 {
  68                         if (context == null)
  69                                 throw new ArgumentNullException ("settings");
  70                         if (printer == null)
  71                                 throw new ArgumentNullException ("printer");
  72
  73                         this.settings = context.Settings;
  74                         this.printer = printer;
  75                 }
  76
  77                 public void DisableReporting ()
  78                 {
  79                         ++reporting_disabled;
  80                 }
  81
  82                 public void EnableReporting ()
  83                 {
  84                         --reporting_disabled;
  85                 }
  86
  87                 public void FeatureIsNotAvailable (CompilerContext compiler, Location loc, string feature)
  88                 {
  89                         string version;
  90                         switch (compiler.Settings.Version) {
  91                         case LanguageVersion.ISO_1:
  92                                 version = "1.0";
  93                                 break;
  94                         case LanguageVersion.ISO_2:
  95                                 version = "2.0";
  96                                 break;
  97                         case LanguageVersion.V_3:
  98                                 version = "3.0";
  99                                 break;
 100                         case LanguageVersion.V_4:
 101                                 version = "4.0";
 102                                 break;
 103                         case LanguageVersion.V_5:
 104                                 version = "5.0";
 105                                 break;
 106                         case LanguageVersion.V_6:
 107                                 version = "6.0";
 108                                 break;
 109                         default:
 110                                 throw new InternalErrorException ("Invalid feature version", compiler.Settings.Version);
 111                         }
 112
 113                         Error (1644, loc,
 114                                 "Feature `{0}' cannot be used because it is not part of the C# {1} language specification",
 115                                       feature, version);
 116                 }
 117
 118                 public void FeatureIsNotSupported (Location loc, string feature)
 119                 {
 120                         Error (1644, loc,
 121                                 "Feature `{0}' is not supported in Mono mcs1 compiler. Consider using the `gmcs' compiler instead",
 122                                 feature);
 123                 }
 124
 125                 public void RuntimeMissingSupport (Location loc, string feature)
 126                 {
 127                         Error (-88, loc, "Your .NET Runtime does not support `{0}'. Please use the latest Mono runtime instead.", feature);
 128                 }
 129
 130                 /// <summary>
 131                 /// In most error cases is very useful to have information about symbol that caused the error.
 132                 /// Call this method before you call Report.Error when it makes sense.
 133                 /// </summary>
 134                 public void SymbolRelatedToPreviousError (Location loc, string symbol)
 135                 {
 136                         SymbolRelatedToPreviousError (loc.ToString ());
 137                 }
 138
 139                 public void SymbolRelatedToPreviousError (MemberSpec ms)
 140                 {
 141                         if (reporting_disabled > 0 || !printer.HasRelatedSymbolSupport)
 142                                 return;
 143
 144                         var mc = ms.MemberDefinition as MemberCore;
 145                         while (ms is ElementTypeSpec) {
 146                                 ms = ((ElementTypeSpec) ms).Element;
 147                                 mc = ms.MemberDefinition as MemberCore;
 148                         }
 149
 150                         if (mc != null) {
 151                                 SymbolRelatedToPreviousError (mc);
 152                         } else {
 153                                 if (ms.DeclaringType != null)
 154                                         ms = ms.DeclaringType;
 155
 156                                 var imported_type = ms.MemberDefinition as ImportedTypeDefinition;
 157                                 if (imported_type != null) {
 158                                         var iad = imported_type.DeclaringAssembly as ImportedAssemblyDefinition;
 159                                         SymbolRelatedToPreviousError (iad.Location);
 160                                 }
 161                         }
 162                 }
 163
 164                 public void SymbolRelatedToPreviousError (MemberCore mc)
 165                 {
 166                         SymbolRelatedToPreviousError (mc.Location, mc.GetSignatureForError ());
 167                 }
 168
 169                 public void SymbolRelatedToPreviousError (string loc)
 170                 {
 171                         string msg = String.Format ("{0} (Location of the symbol related to previous ", loc);
 172                         if (extra_information.Contains (msg))
 173                                 return;
 174
 175                         extra_information.Add (msg);
 176                 }
 177
 178                 public bool CheckWarningCode (int code, Location loc)
 179                 {
 180                         if (AllWarningsHashSet == null)
 181                                 AllWarningsHashSet = new HashSet<int> (AllWarnings);
 182
 183                         if (AllWarningsHashSet.Contains (code))
 184                                 return true;
 185
 186                         Warning (1691, 1, loc, "`{0}' is not a valid warning number", code);
 187                         return false;
 188                 }
 189
 190                 public void ExtraInformation (Location loc, string msg)
 191                 {
 192                         extra_information.Add (String.Format ("{0} {1}", loc, msg));
 193                 }
 194
 195                 public WarningRegions RegisterWarningRegion (Location location)
 196                 {
 197                         WarningRegions regions;
 198                         if (warning_regions_table == null) {
 199                                 regions = null;
 200                                 warning_regions_table = new Dictionary<int, WarningRegions> ();
 201                         } else {
 202                                 warning_regions_table.TryGetValue (location.File, out regions);
 203                         }
 204
 205                         if (regions == null) {
 206                                 regions = new WarningRegions ();
 207                                 warning_regions_table.Add (location.File, regions);
 208                         }
 209
 210                         return regions;
 211                 }
 212
 213                 public void Warning (int code, int level, Location loc, string message)
 214                 {
 215                         if (reporting_disabled > 0)
 216                                 return;
 217
 218                         if (!settings.IsWarningEnabled (code, level))
 219                                 return;
 220
 221                         if (warning_regions_table != null && !loc.IsNull) {
 222                                 WarningRegions regions;
 223                                 if (warning_regions_table.TryGetValue (loc.File, out regions) && !regions.IsWarningEnabled (code, loc.Row))
 224                                         return;
 225                         }
 226
 227                         AbstractMessage msg;
 228                         if (settings.IsWarningAsError (code)) {
 229                                 message = "Warning as Error: " + message;
 230                                 msg = new ErrorMessage (code, loc, message, extra_information);
 231                         } else {
 232                                 msg = new WarningMessage (code, loc, message, extra_information);
 233                         }
 234
 235                         extra_information.Clear ();
 236                         printer.Print (msg, settings.ShowFullPaths);
 237                 }
 238
 239                 public void Warning (int code, int level, Location loc, string format, string arg)
 240                 {
 241                         Warning (code, level, loc, String.Format (format, arg));
 242                 }
 243
 244                 public void Warning (int code, int level, Location loc, string format, string arg1, string arg2)
 245                 {
 246                         Warning (code, level, loc, String.Format (format, arg1, arg2));
 247                 }
 248
 249                 public void Warning (int code, int level, Location loc, string format, params object[] args)
 250                 {
 251                         Warning (code, level, loc, String.Format (format, args));
 252                 }
 253
 254                 public void Warning (int code, int level, string message)
 255                 {
 256                         Warning (code, level, Location.Null, message);
 257                 }
 258
 259                 public void Warning (int code, int level, string format, string arg)
 260                 {
 261                         Warning (code, level, Location.Null, format, arg);
 262                 }
 263
 264                 public void Warning (int code, int level, string format, string arg1, string arg2)
 265                 {
 266                         Warning (code, level, Location.Null, format, arg1, arg2);
 267                 }
 268
 269                 public void Warning (int code, int level, string format, params string[] args)
 270                 {
 271                         Warning (code, level, Location.Null, String.Format (format, args));
 272                 }
 273
 274                 //
 275                 // Warnings encountered so far
 276                 //
 277                 public int Warnings {
 278                         get { return printer.WarningsCount; }
 279                 }
 280
 281                 public void Error (int code, Location loc, string error)
 282                 {
 283                         if (reporting_disabled > 0)
 284                                 return;
 285
 286                         ErrorMessage msg = new ErrorMessage (code, loc, error, extra_information);
 287                         extra_information.Clear ();
 288
 289                         printer.Print (msg, settings.ShowFullPaths);
 290
 291                         if (settings.Stacktrace)
 292                                 Console.WriteLine (FriendlyStackTrace (new StackTrace (true)));
 293
 294                         if (printer.ErrorsCount == settings.FatalCounter)
 295                                 throw new FatalException (msg.Text);
 296                 }
 297
 298                 public void Error (int code, Location loc, string format, string arg)
 299                 {
 300                         Error (code, loc, String.Format (format, arg));
 301                 }
 302
 303                 public void Error (int code, Location loc, string format, string arg1, string arg2)
 304                 {
 305                         Error (code, loc, String.Format (format, arg1, arg2));
 306                 }
 307
 308                 public void Error (int code, Location loc, string format, params string[] args)
 309                 {
 310                         Error (code, loc, String.Format (format, args));
 311                 }
 312
 313                 public void Error (int code, string error)
 314                 {
 315                         Error (code, Location.Null, error);
 316                 }
 317
 318                 public void Error (int code, string format, string arg)
 319                 {
 320                         Error (code, Location.Null, format, arg);
 321                 }
 322
 323                 public void Error (int code, string format, string arg1, string arg2)
 324                 {
 325                         Error (code, Location.Null, format, arg1, arg2);
 326                 }
 327
 328                 public void Error (int code, string format, params string[] args)
 329                 {
 330                         Error (code, Location.Null, String.Format (format, args));
 331                 }
 332
 333                 //
 334                 // Errors encountered so far
 335                 //
 336                 public int Errors {
 337                         get { return printer.ErrorsCount; }
 338                 }
 339
 340                 public bool IsDisabled {
 341                         get {
 342                                 return reporting_disabled > 0;
 343                         }
 344                 }
 345
 346                 public ReportPrinter Printer {
 347                         get { return printer; }
 348                 }
 349
 350                 public ReportPrinter SetPrinter (ReportPrinter printer)
 351                 {
 352                         ReportPrinter old = this.printer;
 353                         this.printer = printer;
 354                         return old;
 355                 }
 356
 357                 [Conditional ("MCS_DEBUG")]
 358                 static public void Debug (string message, params object[] args)
 359                 {
 360                         Debug (4, message, args);
 361                 }
 362
 363                 [Conditional ("MCS_DEBUG")]
 364                 static public void Debug (int category, string message, params object[] args)
 365                 {
 366 //                      if ((category & DebugFlags) == 0)
 367 //                              return;
 368
 369                         StringBuilder sb = new StringBuilder (message);
 370
 371                         if ((args != null) && (args.Length > 0)) {
 372                                 sb.Append (": ");
 373
 374                                 bool first = true;
 375                                 foreach (object arg in args) {
 376                                         if (first)
 377                                                 first = false;
 378                                         else
 379                                                 sb.Append (", ");
 380                                         if (arg == null)
 381                                                 sb.Append ("null");
 382 //                                      else if (arg is ICollection)
 383 //                                              sb.Append (PrintCollection ((ICollection) arg));
 384                                         else
 385                                                 sb.Append (arg);
 386                                 }
 387                         }
 388
 389                         Console.WriteLine (sb.ToString ());
 390                 }
 391 /*
 392                 static public string PrintCollection (ICollection collection)
 393                 {
 394                         StringBuilder sb = new StringBuilder ();
 395
 396                         sb.Append (collection.GetType ());
 397                         sb.Append ("(");
 398
 399                         bool first = true;
 400                         foreach (object o in collection) {
 401                                 if (first)
 402                                         first = false;
 403                                 else
 404                                         sb.Append (", ");
 405                                 sb.Append (o);
 406                         }
 407
 408                         sb.Append (")");
 409                         return sb.ToString ();
 410                 }
 411 */
 412                 static string FriendlyStackTrace (StackTrace t)
 413                 {
 414                         StringBuilder sb = new StringBuilder ();
 415
 416                         bool foundUserCode = false;
 417
 418                         for (int i = 0; i < t.FrameCount; i++) {
 419                                 StackFrame f = t.GetFrame (i);
 420                                 var mb = f.GetMethod ();
 421
 422                                 if (!foundUserCode && mb.ReflectedType == typeof (Report))
 423                                         continue;
 424
 425                                 foundUserCode = true;
 426
 427                                 sb.Append ("\tin ");
 428
 429                                 if (f.GetFileLineNumber () > 0)
 430                                         sb.AppendFormat ("(at {0}:{1}) ", f.GetFileName (), f.GetFileLineNumber ());
 431
 432                                 sb.AppendFormat ("{0}.{1} (", mb.ReflectedType.Name, mb.Name);
 433
 434                                 bool first = true;
 435                                 foreach (var pi in mb.GetParameters ()) {
 436                                         if (!first)
 437                                                 sb.Append (", ");
 438                                         first = false;
 439
 440                                         sb.Append (pi.ParameterType.FullName);
 441                                 }
 442                                 sb.Append (")\n");
 443                         }
 444
 445                         return sb.ToString ();
 446                 }
 447         }
 448
 449         public abstract class AbstractMessage
 450         {
 451                 readonly string[] extra_info;
 452                 protected readonly int code;
 453                 protected readonly Location location;
 454                 readonly string message;
 455
 456                 protected AbstractMessage (int code, Location loc, string msg, List<string> extraInfo)
 457                 {
 458                         this.code = code;
 459                         if (code < 0)
 460                                 this.code = 8000 - code;
 461
 462                         this.location = loc;
 463                         this.message = msg;
 464                         if (extraInfo.Count != 0) {
 465                                 this.extra_info = extraInfo.ToArray ();
 466                         }
 467                 }
 468
 469                 protected AbstractMessage (AbstractMessage aMsg)
 470                 {
 471                         this.code = aMsg.code;
 472                         this.location = aMsg.location;
 473                         this.message = aMsg.message;
 474                         this.extra_info = aMsg.extra_info;
 475                 }
 476
 477                 public int Code {
 478                         get { return code; }
 479                 }
 480
 481                 public override bool Equals (object obj)
 482                 {
 483                         AbstractMessage msg = obj as AbstractMessage;
 484                         if (msg == null)
 485                                 return false;
 486
 487                         return code == msg.code && location.Equals (msg.location) && message == msg.message;
 488                 }
 489
 490                 public override int GetHashCode ()
 491                 {
 492                         return code.GetHashCode ();
 493                 }
 494
 495                 public abstract bool IsWarning { get; }
 496
 497                 public Location Location {
 498                         get { return location; }
 499                 }
 500
 501                 public abstract string MessageType { get; }
 502
 503                 public string[] RelatedSymbols {
 504                         get { return extra_info; }
 505                 }
 506
 507                 public string Text {
 508                         get { return message; }
 509                 }
 510         }
 511
 512         sealed class WarningMessage : AbstractMessage
 513         {
 514                 public WarningMessage (int code, Location loc, string message, List<string> extra_info)
 515                         : base (code, loc, message, extra_info)
 516                 {
 517                 }
 518
 519                 public override bool IsWarning {
 520                         get { return true; }
 521                 }
 522
 523                 public override string MessageType {
 524                         get {
 525                                 return "warning";
 526                         }
 527                 }
 528         }
 529
 530         sealed class ErrorMessage : AbstractMessage
 531         {
 532                 public ErrorMessage (int code, Location loc, string message, List<string> extraInfo)
 533                         : base (code, loc, message, extraInfo)
 534                 {
 535                 }
 536
 537                 public ErrorMessage (AbstractMessage aMsg)
 538                         : base (aMsg)
 539                 {
 540                 }
 541
 542                 public override bool IsWarning {
 543                         get { return false; }
 544                 }
 545
 546                 public override string MessageType {
 547                         get {
 548                                 return "error";
 549                         }
 550                 }
 551         }
 552
 553         //
 554         // Generic base for any message writer
 555         //
 556         public abstract class ReportPrinter
 557         {
 558                 protected HashSet<ITypeDefinition> reported_missing_definitions;
 559
 560                 #region Properties
 561
 562                 public int ErrorsCount { get; protected set; }
 563
 564                 public int WarningsCount { get; private set; }
 565
 566                 //
 567                 // When (symbols related to previous ...) can be used
 568                 //
 569                 public virtual bool HasRelatedSymbolSupport {
 570                         get { return true; }
 571                 }
 572
 573                 #endregion
 574
 575
 576                 protected virtual string FormatText (string txt)
 577                 {
 578                         return txt;
 579                 }
 580
 581                 public virtual void Print (AbstractMessage msg, bool showFullPath)
 582                 {
 583                         if (msg.IsWarning) {
 584                                 ++WarningsCount;
 585                         } else {
 586                                 ++ErrorsCount;
 587                         }
 588                 }
 589
 590                 protected void Print (AbstractMessage msg, TextWriter output, bool showFullPath)
 591                 {
 592                         StringBuilder txt = new StringBuilder ();
 593                         if (!msg.Location.IsNull) {
 594                                 if (showFullPath)
 595                                         txt.Append (msg.Location.ToStringFullName ());
 596                                 else
 597                                         txt.Append (msg.Location.ToString ());
 598
 599                                 txt.Append (" ");
 600                         }
 601
 602                         txt.AppendFormat ("{0} CS{1:0000}: {2}", msg.MessageType, msg.Code, msg.Text);
 603
 604                         if (!msg.IsWarning)
 605                                 output.WriteLine (FormatText (txt.ToString ()));
 606                         else
 607                                 output.WriteLine (txt.ToString ());
 608
 609                         if (msg.RelatedSymbols != null) {
 610                                 foreach (string s in msg.RelatedSymbols)
 611                                         output.WriteLine (s + msg.MessageType + ")");
 612                         }
 613                 }
 614
 615                 //
 616                 // Tracks reported missing types. It needs to be session specific
 617                 // because we can run in probing mode
 618                 //
 619                 public bool MissingTypeReported (ITypeDefinition typeDefinition)
 620                 {
 621                         if (reported_missing_definitions == null)
 622                                 reported_missing_definitions = new HashSet<ITypeDefinition> ();
 623
 624                         if (reported_missing_definitions.Contains (typeDefinition))
 625                                 return true;
 626
 627                         reported_missing_definitions.Add (typeDefinition);
 628                         return false;
 629                 }
 630
 631                 public void Reset ()
 632                 {
 633                         // HACK: Temporary hack for broken repl flow
 634                         ErrorsCount = WarningsCount = 0;
 635                 }
 636         }
 637
 638         sealed class NullReportPrinter : ReportPrinter
 639         {
 640         }
 641
 642         //
 643         // Default message recorder, it uses two types of message groups.
 644         // Common messages: messages reported in all sessions.
 645         // Merged messages: union of all messages in all sessions.
 646         //
 647         // Used by the Lambda expressions to compile the code with various
 648         // parameter values, or by attribute resolver
 649         //
 650         class SessionReportPrinter : ReportPrinter
 651         {
 652                 List<AbstractMessage> session_messages;
 653                 //
 654                 // A collection of exactly same messages reported in all sessions
 655                 //
 656                 List<AbstractMessage> common_messages;
 657
 658                 //
 659                 // A collection of unique messages reported in all sessions
 660                 //
 661                 List<AbstractMessage> merged_messages;
 662
 663                 bool showFullPaths;
 664
 665                 public void ClearSession ()
 666                 {
 667                         session_messages = null;
 668                 }
 669
 670                 public override void Print (AbstractMessage msg, bool showFullPath)
 671                 {
 672                         //
 673                         // This line is useful when debugging recorded messages
 674                         //
 675                         // Console.WriteLine ("RECORDING: {0}", msg.Text);
 676
 677                         if (session_messages == null)
 678                                 session_messages = new List<AbstractMessage> ();
 679
 680                         session_messages.Add (msg);
 681
 682                         this.showFullPaths = showFullPath;
 683                         base.Print (msg, showFullPath);
 684                 }
 685
 686                 public void EndSession ()
 687                 {
 688                         if (session_messages == null)
 689                                 return;
 690
 691                         //
 692                         // Handles the first session
 693                         //
 694                         if (common_messages == null) {
 695                                 common_messages = new List<AbstractMessage> (session_messages);
 696                                 merged_messages = session_messages;
 697                                 session_messages = null;
 698                                 return;
 699                         }
 700
 701                         //
 702                         // Store common messages if any
 703                         //
 704                         for (int i = 0; i < common_messages.Count; ++i) {
 705                                 AbstractMessage cmsg = common_messages[i];
 706                                 bool common_msg_found = false;
 707                                 foreach (AbstractMessage msg in session_messages) {
 708                                         if (cmsg.Equals (msg)) {
 709                                                 common_msg_found = true;
 710                                                 break;
 711                                         }
 712                                 }
 713
 714                                 if (!common_msg_found)
 715                                         common_messages.RemoveAt (i);
 716                         }
 717
 718                         //
 719                         // Merge session and previous messages
 720                         //
 721                         for (int i = 0; i < session_messages.Count; ++i) {
 722                                 AbstractMessage msg = session_messages[i];
 723                                 bool msg_found = false;
 724                                 for (int ii = 0; ii < merged_messages.Count; ++ii) {
 725                                         if (msg.Equals (merged_messages[ii])) {
 726                                                 msg_found = true;
 727                                                 break;
 728                                         }
 729                                 }
 730
 731                                 if (!msg_found)
 732                                         merged_messages.Add (msg);
 733                         }
 734                 }
 735
 736                 public bool IsEmpty {
 737                         get {
 738                                 return merged_messages == null && common_messages == null;
 739                         }
 740                 }
 741
 742                 //
 743                 // Prints collected messages, common messages have a priority
 744                 //
 745                 public bool Merge (ReportPrinter dest)
 746                 {
 747                         var messages_to_print = merged_messages;
 748                         if (common_messages != null && common_messages.Count > 0) {
 749                                 messages_to_print = common_messages;
 750                         }
 751
 752                         if (messages_to_print == null)
 753                                 return false;
 754
 755                         bool error_msg = false;
 756                         foreach (AbstractMessage msg in messages_to_print) {
 757                                 dest.Print (msg, showFullPaths);
 758                                 error_msg |= !msg.IsWarning;
 759                         }
 760
 761                         if (reported_missing_definitions != null) {
 762                                 foreach (var missing in reported_missing_definitions)
 763                                         dest.MissingTypeReported (missing);
 764                         }
 765
 766                         return error_msg;
 767                 }
 768         }
 769
 770         public class StreamReportPrinter : ReportPrinter
 771         {
 772                 readonly TextWriter writer;
 773
 774                 public StreamReportPrinter (TextWriter writer)
 775                 {
 776                         this.writer = writer;
 777                 }
 778
 779                 public override void Print (AbstractMessage msg, bool showFullPath)
 780                 {
 781                         Print (msg, writer, showFullPath);
 782                         base.Print (msg, showFullPath);
 783                 }
 784         }
 785
 786         public class ConsoleReportPrinter : StreamReportPrinter
 787         {
 788                 static readonly string prefix, postfix;
 789
 790                 static ConsoleReportPrinter ()
 791                 {
 792                         string term = Environment.GetEnvironmentVariable ("TERM");
 793                         bool xterm_colors = false;
 794
 795                         switch (term){
 796                         case "xterm":
 797                         case "rxvt":
 798                         case "rxvt-unicode":
 799                                 if (Environment.GetEnvironmentVariable ("COLORTERM") != null){
 800                                         xterm_colors = true;
 801                                 }
 802                                 break;
 803
 804                         case "xterm-color":
 805                         case "xterm-256color":
 806                                 xterm_colors = true;
 807                                 break;
 808                         }
 809                         if (!xterm_colors)
 810                                 return;
 811
 812                         if (!(UnixUtils.isatty (1) && UnixUtils.isatty (2)))
 813                                 return;
 814
 815                         string config = Environment.GetEnvironmentVariable ("MCS_COLORS");
 816                         if (config == null){
 817                                 config = "errors=red";
 818                                 //config = "brightwhite,red";
 819                         }
 820
 821                         if (config == "disable")
 822                                 return;
 823
 824                         if (!config.StartsWith ("errors="))
 825                                 return;
 826
 827                         config = config.Substring (7);
 828
 829                         int p = config.IndexOf (",");
 830                         if (p == -1)
 831                                 prefix = GetForeground (config);
 832                         else
 833                                 prefix = GetBackground (config.Substring (p+1)) + GetForeground (config.Substring (0, p));
 834                         postfix = "\x001b[0m";
 835                 }
 836
 837                 public ConsoleReportPrinter ()
 838                         : base (Console.Error)
 839                 {
 840                 }
 841
 842                 public ConsoleReportPrinter (TextWriter writer)
 843                         : base (writer)
 844                 {
 845                 }
 846
 847                 static int NameToCode (string s)
 848                 {
 849                         switch (s) {
 850                         case "black":
 851                                 return 0;
 852                         case "red":
 853                                 return 1;
 854                         case "green":
 855                                 return 2;
 856                         case "yellow":
 857                                 return 3;
 858                         case "blue":
 859                                 return 4;
 860                         case "magenta":
 861                                 return 5;
 862                         case "cyan":
 863                                 return 6;
 864                         case "grey":
 865                         case "white":
 866                                 return 7;
 867                         }
 868                         return 7;
 869                 }
 870
 871                 //
 872                 // maps a color name to its xterm color code
 873                 //
 874                 static string GetForeground (string s)
 875                 {
 876                         string highcode;
 877
 878                         if (s.StartsWith ("bright")) {
 879                                 highcode = "1;";
 880                                 s = s.Substring (6);
 881                         } else
 882                                 highcode = "";
 883
 884                         return "\x001b[" + highcode + (30 + NameToCode (s)).ToString () + "m";
 885                 }
 886
 887                 static string GetBackground (string s)
 888                 {
 889                         return "\x001b[" + (40 + NameToCode (s)).ToString () + "m";
 890                 }
 891
 892                 protected override string FormatText (string txt)
 893                 {
 894                         if (prefix != null)
 895                                 return prefix + txt + postfix;
 896
 897                         return txt;
 898                 }
 899         }
 900
 901         class TimeReporter
 902         {
 903                 public enum TimerType
 904                 {
 905                         ParseTotal,
 906                         AssemblyBuilderSetup,
 907                         CreateTypeTotal,
 908                         ReferencesLoading,
 909                         ReferencesImporting,
 910                         PredefinedTypesInit,
 911                         ModuleDefinitionTotal,
 912                         EmitTotal,
 913                         CloseTypes,
 914                         Resouces,
 915                         OutputSave,
 916                         DebugSave,
 917                 }
 918
 919                 readonly Stopwatch[] timers;
 920                 Stopwatch total;
 921
 922                 public TimeReporter (bool enabled)
 923                 {
 924                         if (!enabled)
 925                                 return;
 926
 927                         timers = new Stopwatch[System.Enum.GetValues(typeof (TimerType)).Length];
 928                 }
 929
 930                 public void Start (TimerType type)
 931                 {
 932                         if (timers != null) {
 933                                 var sw = new Stopwatch ();
 934                                 timers[(int) type] = sw;
 935                                 sw.Start ();
 936                         }
 937                 }
 938
 939                 public void StartTotal ()
 940                 {
 941                         total = new Stopwatch ();
 942                         total.Start ();
 943                 }
 944
 945                 public void Stop (TimerType type)
 946                 {
 947                         if (timers != null) {
 948                                 timers[(int) type].Stop ();
 949                         }
 950                 }
 951
 952                 public void StopTotal ()
 953                 {
 954                         total.Stop ();
 955                 }
 956
 957                 public void ShowStats ()
 958                 {
 959                         if (timers == null)
 960                                 return;
 961
 962                         Dictionary<TimerType, string> timer_names = new Dictionary<TimerType,string> {
 963                                 { TimerType.ParseTotal, "Parsing source files" },
 964                                 { TimerType.AssemblyBuilderSetup, "Assembly builder setup" },
 965                                 { TimerType.CreateTypeTotal, "Compiled types created" },
 966                                 { TimerType.ReferencesLoading, "Referenced assemblies loading" },
 967                                 { TimerType.ReferencesImporting, "Referenced assemblies importing" },
 968                                 { TimerType.PredefinedTypesInit, "Predefined types initialization" },
 969                                 { TimerType.ModuleDefinitionTotal, "Module definition" },
 970                                 { TimerType.EmitTotal, "Resolving and emitting members blocks" },
 971                                 { TimerType.CloseTypes, "Module types closed" },
 972                                 { TimerType.Resouces, "Embedding resources" },
 973                                 { TimerType.OutputSave, "Writing output file" },
 974                                 { TimerType.DebugSave, "Writing debug symbols file" },
 975                         };
 976
 977                         int counter = 0;
 978                         double percentage = (double) total.ElapsedMilliseconds / 100;
 979                         long subtotal = total.ElapsedMilliseconds;
 980                         foreach (var timer in timers) {
 981                                 string msg = timer_names[(TimerType) counter++];
 982                                 var ms = timer == null ? 0 : timer.ElapsedMilliseconds;
 983                                 Console.WriteLine ("{0,4:0.0}% {1,5}ms {2}", ms / percentage, ms, msg);
 984                                 subtotal -= ms;
 985                         }
 986
 987                         Console.WriteLine ("{0,4:0.0}% {1,5}ms Other tasks", subtotal / percentage, subtotal);
 988                         Console.WriteLine ();
 989                         Console.WriteLine ("Total elapsed time: {0}", total.Elapsed);
 990                 }
 991         }
 992
 993         public class InternalErrorException : Exception {
 994                 public InternalErrorException (MemberCore mc, Exception e)
 995                         : base (mc.Location + " " + mc.GetSignatureForError (), e)
 996                 {
 997                 }
 998
 999                 public InternalErrorException ()
1000                         : base ("Internal error")
1001                 {
1002                 }
1003
1004                 public InternalErrorException (string message)
1005                         : base (message)
1006                 {
1007                 }
1008
1009                 public InternalErrorException (string message, params object[] args)
1010                         : base (String.Format (message, args))
1011                 {
1012                 }
1013
1014                 public InternalErrorException (Exception exception, string message, params object[] args)
1015                         : base (String.Format (message, args), exception)
1016                 {
1017                 }
1018
1019                 public InternalErrorException (Exception e, Location loc)
1020                         : base (loc.ToString (), e)
1021                 {
1022                 }
1023         }
1024
1025         class FatalException : Exception
1026         {
1027                 public FatalException (string message)
1028                         : base (message)
1029                 {
1030                 }
1031         }
1032
1033         /// <summary>
1034         /// Handles #pragma warning
1035         /// </summary>
1036         public class WarningRegions {
1037
1038                 abstract class PragmaCmd
1039                 {
1040                         public int Line;
1041
1042                         protected PragmaCmd (int line)
1043                         {
1044                                 Line = line;
1045                         }
1046
1047                         public abstract bool IsEnabled (int code, bool previous);
1048                 }
1049
1050                 class Disable : PragmaCmd
1051                 {
1052                         int code;
1053                         public Disable (int line, int code)
1054                                 : base (line)
1055                         {
1056                                 this.code = code;
1057                         }
1058
1059                         public override bool IsEnabled (int code, bool previous)
1060                         {
1061                                 return this.code != code && previous;
1062                         }
1063                 }
1064
1065                 class DisableAll : PragmaCmd
1066                 {
1067                         public DisableAll (int line)
1068                                 : base (line) {}
1069
1070                         public override bool IsEnabled(int code, bool previous)
1071                         {
1072                                 return false;
1073                         }
1074                 }
1075
1076                 class Enable : PragmaCmd
1077                 {
1078                         int code;
1079                         public Enable (int line, int code)
1080                                 : base (line)
1081                         {
1082                                 this.code = code;
1083                         }
1084
1085                         public override bool IsEnabled(int code, bool previous)
1086                         {
1087                                 return this.code == code || previous;
1088                         }
1089                 }
1090
1091                 class EnableAll : PragmaCmd
1092                 {
1093                         public EnableAll (int line)
1094                                 : base (line) {}
1095
1096                         public override bool IsEnabled(int code, bool previous)
1097                         {
1098                                 return true;
1099                         }
1100                 }
1101
1102
1103                 List<PragmaCmd> regions = new List<PragmaCmd> ();
1104
1105                 public void WarningDisable (int line)
1106                 {
1107                         regions.Add (new DisableAll (line));
1108                 }
1109
1110                 public void WarningDisable (Location location, int code, Report Report)
1111                 {
1112                         if (Report.CheckWarningCode (code, location))
1113                                 regions.Add (new Disable (location.Row, code));
1114                 }
1115
1116                 public void WarningEnable (int line)
1117                 {
1118                         regions.Add (new EnableAll (line));
1119                 }
1120
1121                 public void WarningEnable (Location location, int code, CompilerContext context)
1122                 {
1123                         if (!context.Report.CheckWarningCode (code, location))
1124                                 return;
1125
1126                         if (context.Settings.IsWarningDisabledGlobally (code))
1127                                 context.Report.Warning (1635, 1, location, "Cannot restore warning `CS{0:0000}' because it was disabled globally", code);
1128
1129                         regions.Add (new Enable (location.Row, code));
1130                 }
1131
1132                 public bool IsWarningEnabled (int code, int src_line)
1133                 {
1134                         bool result = true;
1135                         foreach (PragmaCmd pragma in regions) {
1136                                 if (src_line < pragma.Line)
1137                                         break;
1138
1139                                 result = pragma.IsEnabled (code, result);
1140                         }
1141                         return result;
1142                 }
1143         }
1144 }