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@seznam.cz)
   6 //
   7 // (C) 2001 Ximian, Inc. (http://www.ximian.com)
   8 //
   9
  10 using System;
  11 using System.IO;
  12 using System.Text;
  13 using System.Collections;
  14 using System.Collections.Specialized;
  15 using System.Diagnostics;
  16 using System.Reflection;
  17 using System.Reflection.Emit;
  18
  19 namespace Mono.CSharp {
  20
  21         /// <summary>
  22         ///   This class is used to report errors and warnings t te user.
  23         /// </summary>
  24         public class Report {
  25                 /// <summary>
  26                 ///   Errors encountered so far
  27                 /// </summary>
  28                 static public int Errors;
  29
  30                 /// <summary>
  31                 ///   Warnings encountered so far
  32                 /// </summary>
  33                 static public int Warnings;
  34
  35                 /// <summary>
  36                 ///   Whether errors should be throw an exception
  37                 /// </summary>
  38                 static public bool Fatal;
  39
  40                 /// <summary>
  41                 ///   Whether warnings should be considered errors
  42                 /// </summary>
  43                 static public bool WarningsAreErrors;
  44
  45
  46                 /// <summary>
  47                 ///   Whether to dump a stack trace on errors.
  48                 /// </summary>
  49                 static public bool Stacktrace;
  50
  51                 static public TextWriter Stderr = Console.Error;
  52
  53                 //
  54                 // If the 'expected' error code is reported then the
  55                 // compilation succeeds.
  56                 //
  57                 // Used for the test suite to excercise the error codes
  58                 //
  59                 static int expected_error = 0;
  60
  61                 //
  62                 // Keeps track of the warnings that we are ignoring
  63                 //
  64                 public static Hashtable warning_ignore_table;
  65
  66                 static Hashtable warning_regions_table;
  67
  68                 //
  69                 // This is used to save/restore the error state.  When the
  70                 // error stack contains elements, warnings and errors are not
  71                 // reported to the user.  This is used by the Lambda expression
  72                 // support to compile the code with various parameter values.
  73                 // A stack because of `Report.Errors == errors;'
  74                 //
  75                 static Stack error_stack;
  76                 static Stack warning_stack;
  77                 static bool reporting_disabled;
  78
  79                 static int warning_level;
  80
  81                 /// <summary>
  82                 /// List of symbols related to reported error/warning. You have to fill it before error/warning is reported.
  83                 /// </summary>
  84                 static ArrayList extra_information = new ArrayList ();
  85
  86                 //
  87                 // IF YOU ADD A NEW WARNING YOU HAVE TO ADD ITS ID HERE
  88                 //
  89                 public static readonly int[] AllWarnings = new int[] {
  90                         28, 67, 78,
  91                         105, 108, 109, 114, 162, 164, 168, 169, 183, 184, 197,
  92                         219, 251, 252, 253, 278, 282,
  93                         419, 420, 429, 436, 440, 465, 467, 469, 472,
  94                         612, 618, 626, 628, 642, 649, 652, 658, 659, 660, 661, 665, 672, 675,
  95                         809,
  96                         1030,
  97                         1522, 1570, 1571, 1572, 1573, 1574, 1580, 1581, 1584, 1587, 1589, 1590, 1591, 1592,
  98                         1616, 1633, 1634, 1635, 1685, 1690, 1691, 1692,
  99                         1717, 1718, 1720,
 100                         1901,
 101                         2002, 2023, 2029,
 102                         3005, 3012, 3018, 3019, 3021, 3022, 3023, 3026, 3027,
 103 #if GMCS_SOURCE
 104                         402, 414, 458, 693, 1058, 1700, 3024
 105 #endif
 106                 };
 107
 108                 static Report ()
 109                 {
 110                         // Just to be sure that binary search is working
 111                         Array.Sort (AllWarnings);
 112                 }
 113
 114                 public static void Reset ()
 115                 {
 116                         Errors = Warnings = 0;
 117                         WarningsAreErrors = false;
 118                         warning_ignore_table = null;
 119                         warning_regions_table = null;
 120                         reporting_disabled = false;
 121                 }
 122
 123                 public static void DisableReporting ()
 124                 {
 125                         if (error_stack == null)
 126                                 error_stack = new Stack ();
 127                         error_stack.Push (Errors);
 128
 129                         if (Warnings > 0) {
 130                                 if (warning_stack == null)
 131                                         warning_stack = new Stack ();
 132                                 warning_stack.Push (Warnings);
 133                         }
 134
 135                         reporting_disabled = true;
 136                 }
 137
 138                 public static void EnableReporting ()
 139                 {
 140                         if (warning_stack != null)
 141                                 Warnings = (int) warning_stack.Pop ();
 142
 143                         Errors = (int) error_stack.Pop ();
 144                         if (error_stack.Count == 0) {
 145                                 reporting_disabled = false;
 146                         }
 147                 }
 148
 149                 public static IMessageRecorder msg_recorder;
 150
 151                 public static IMessageRecorder SetMessageRecorder (IMessageRecorder recorder)
 152                 {
 153                         IMessageRecorder previous = msg_recorder;
 154                         msg_recorder = recorder;
 155                         return previous;
 156                 }
 157
 158                 public interface IMessageRecorder
 159                 {
 160                         void EndSession ();
 161                         void AddMessage (AbstractMessage msg);
 162                         bool PrintMessages ();
 163                 }
 164
 165                 //
 166                 // Default message recorder, it uses two types of message groups.
 167                 // Common messages: messages reported in all sessions.
 168                 // Merged messages: union of all messages in all sessions.
 169                 //
 170                 public struct MessageRecorder : IMessageRecorder
 171                 {
 172                         ArrayList session_messages;
 173                         //
 174                         // A collection of exactly same messages reported in all sessions
 175                         //
 176                         ArrayList common_messages;
 177
 178                         //
 179                         // A collection of unique messages reported in all sessions
 180                         //
 181                         ArrayList merged_messages;
 182
 183                         public void EndSession ()
 184                         {
 185                                 if (session_messages == null)
 186                                         return;
 187
 188                                 //
 189                                 // Handles the first session
 190                                 //
 191                                 if (common_messages == null) {
 192                                         common_messages = new ArrayList (session_messages);
 193                                         merged_messages = session_messages;
 194                                         session_messages = null;
 195                                         return;
 196                                 }
 197
 198                                 //
 199                                 // Store common messages if any
 200                                 //
 201                                 for (int i = 0; i < common_messages.Count; ++i) {
 202                                         AbstractMessage cmsg = (AbstractMessage) common_messages [i];
 203                                         bool common_msg_found = false;
 204                                         foreach (AbstractMessage msg in session_messages) {
 205                                                 if (cmsg.Equals (msg)) {
 206                                                         common_msg_found = true;
 207                                                         break;
 208                                                 }
 209                                         }
 210
 211                                         if (!common_msg_found)
 212                                                 common_messages.RemoveAt (i);
 213                                 }
 214
 215                                 //
 216                                 // Merge session and previous messages
 217                                 //
 218                                 for (int i = 0; i < session_messages.Count; ++i) {
 219                                         AbstractMessage msg = (AbstractMessage) session_messages [i];
 220                                         bool msg_found = false;
 221                                         for (int ii = 0; ii < merged_messages.Count; ++ii) {
 222                                                 if (msg.Equals (merged_messages [ii])) {
 223                                                         msg_found = true;
 224                                                         break;
 225                                                 }
 226                                         }
 227
 228                                         if (!msg_found)
 229                                                 merged_messages.Add (msg);
 230                                 }
 231                         }
 232
 233                         public void AddMessage (AbstractMessage msg)
 234                         {
 235                                 if (session_messages == null)
 236                                         session_messages = new ArrayList ();
 237
 238                                 session_messages.Add (msg);
 239                         }
 240
 241                         //
 242                         // Prints collected messages, common messages have a priority
 243                         //
 244                         public bool PrintMessages ()
 245                         {
 246                                 ArrayList messages_to_print = merged_messages;
 247                                 if (common_messages != null && common_messages.Count > 0) {
 248                                         messages_to_print = common_messages;
 249                                 }
 250
 251                                 if (messages_to_print == null)
 252                                         return false;
 253
 254                                 foreach (AbstractMessage msg in messages_to_print)
 255                                         msg.Print ();
 256
 257                                 return true;
 258                         }
 259                 }
 260
 261                 public abstract class AbstractMessage
 262                 {
 263                         readonly string[] extra_info;
 264                         protected readonly int code;
 265                         protected readonly Location location;
 266                         readonly string message;
 267
 268                         protected AbstractMessage (int code, Location loc, string msg, ArrayList extraInfo)
 269                         {
 270                                 this.code = code;
 271                                 if (code < 0)
 272                                         this.code = 8000 - code;
 273
 274                                 this.location = loc;
 275                                 this.message = msg;
 276                                 if (extraInfo.Count != 0) {
 277                                         this.extra_info = (string[])extraInfo.ToArray (typeof (string));
 278                                 }
 279                         }
 280
 281                         protected AbstractMessage (AbstractMessage aMsg)
 282                         {
 283                                 this.code = aMsg.code;
 284                                 this.location = aMsg.location;
 285                                 this.message = aMsg.message;
 286                                 this.extra_info = aMsg.extra_info;
 287                         }
 288
 289                         static void Check (int code)
 290                         {
 291                                 if (code == expected_error) {
 292                                         Environment.Exit (0);
 293                                 }
 294                         }
 295
 296                         public override bool Equals (object obj)
 297                         {
 298                                 AbstractMessage msg = obj as AbstractMessage;
 299                                 if (msg == null)
 300                                         return false;
 301
 302                                 return code == msg.code && location.Equals (msg.location) && message == msg.message;
 303                         }
 304
 305                         public override int GetHashCode ()
 306                         {
 307                                 return code.GetHashCode ();
 308                         }
 309
 310                         public abstract bool IsWarning { get; }
 311
 312                         public abstract string MessageType { get; }
 313
 314                         public virtual void Print ()
 315                         {
 316                                 if (msg_recorder != null) {
 317                                         //
 318                                         // This line is useful when debugging messages recorder
 319                                         //
 320                                         // Console.WriteLine ("RECORDING: {0} {1} {2}", code, location, message);
 321                                         msg_recorder.AddMessage (this);
 322                                         return;
 323                                 }
 324
 325                                 if (reporting_disabled)
 326                                         return;
 327
 328                                 StringBuilder msg = new StringBuilder ();
 329                                 if (!location.IsNull) {
 330                                         msg.Append (location.ToString ());
 331                                         msg.Append (" ");
 332                                 }
 333                                 msg.AppendFormat ("{0} CS{1:0000}: {2}", MessageType, code, message);
 334
 335                                 //
 336                                 //
 337                                 if (Stderr == Console.Error)
 338                                         Stderr.WriteLine (ColorFormat (msg.ToString ()));
 339                                 else
 340                                         Stderr.WriteLine (msg.ToString ());
 341
 342                                 if (extra_info != null) {
 343                                         foreach (string s in extra_info)
 344                                                 Stderr.WriteLine (s + MessageType + ")");
 345                                 }
 346
 347                                 if (Stacktrace)
 348                                         Console.WriteLine (FriendlyStackTrace (new StackTrace (true)));
 349
 350                                 if (Fatal) {
 351                                         if (!IsWarning || WarningsAreErrors)
 352                                                 throw new Exception (message);
 353                                 }
 354
 355                                 Check (code);
 356                         }
 357
 358                         public virtual string ColorFormat (string s)
 359                         {
 360                                 return s;
 361                         }
 362                 }
 363
 364                 sealed class WarningMessage : AbstractMessage
 365                 {
 366                         readonly int Level;
 367
 368                         public WarningMessage (int code, int level, Location loc, string message, ArrayList extra_info)
 369                                 : base (code, loc, message, extra_info)
 370                         {
 371                                 Level = level;
 372                         }
 373
 374                         public override bool IsWarning {
 375                                 get { return true; }
 376                         }
 377
 378                         bool IsEnabled ()
 379                         {
 380                                 if (WarningLevel < Level)
 381                                         return false;
 382
 383                                 if (warning_ignore_table != null) {
 384                                         if (warning_ignore_table.Contains (code)) {
 385                                                 return false;
 386                                         }
 387                                 }
 388
 389                                 if (warning_regions_table == null || location.IsNull)
 390                                         return true;
 391
 392                                 WarningRegions regions = (WarningRegions)warning_regions_table [location.Name];
 393                                 if (regions == null)
 394                                         return true;
 395
 396                                 return regions.IsWarningEnabled (code, location.Row);
 397                         }
 398
 399                         public override void Print ()
 400                         {
 401                                 if (!IsEnabled ())
 402                                         return;
 403
 404                                 if (WarningsAreErrors) {
 405                                         new ErrorMessage (this).Print ();
 406                                         return;
 407                                 }
 408
 409                                 Warnings++;
 410                                 base.Print ();
 411                         }
 412
 413                         public override string MessageType {
 414                                 get {
 415                                         return "warning";
 416                                 }
 417                         }
 418                 }
 419
 420                 static int NameToCode (string s)
 421                 {
 422                         switch (s){
 423                         case "black":
 424                                 return 0;
 425                         case "red":
 426                                 return 1;
 427                         case "green":
 428                                 return 2;
 429                         case "yellow":
 430                                 return 3;
 431                         case "blue":
 432                                 return 4;
 433                         case "magenta":
 434                                 return 5;
 435                         case "cyan":
 436                                 return 6;
 437                         case "grey":
 438                         case "white":
 439                                 return 7;
 440                         }
 441                         return 7;
 442                 }
 443
 444                 //
 445                 // maps a color name to its xterm color code
 446                 //
 447                 static string GetForeground (string s)
 448                 {
 449                         string highcode;
 450
 451                         if (s.StartsWith ("bright")){
 452                                 highcode = "1;";
 453                                 s = s.Substring (6);
 454                         } else
 455                                 highcode = "";
 456
 457                         return "\x001b[" + highcode + (30 + NameToCode (s)).ToString () + "m";
 458                 }
 459
 460                 static string GetBackground (string s)
 461                 {
 462                         return "\x001b[" + (40 + NameToCode (s)).ToString () + "m";
 463                 }
 464
 465                 sealed class ErrorMessage : AbstractMessage
 466                 {
 467                         static string prefix, postfix;
 468
 469                         [System.Runtime.InteropServices.DllImport ("libc", EntryPoint="isatty")]
 470                         extern static int _isatty (int fd);
 471
 472                         static bool isatty (int fd)
 473                         {
 474                                 try {
 475                                         return _isatty (fd) == 1;
 476                                 } catch {
 477                                         return false;
 478                                 }
 479                         }
 480
 481                         static ErrorMessage ()
 482                         {
 483                                 string term = Environment.GetEnvironmentVariable ("TERM");
 484                                 bool xterm_colors = false;
 485
 486                                 switch (term){
 487                                 case "xterm":
 488                                 case "rxvt":
 489                                 case "rxvt-unicode":
 490                                         if (Environment.GetEnvironmentVariable ("COLORTERM") != null){
 491                                                 xterm_colors = true;
 492                                         }
 493                                         break;
 494
 495                                 case "xterm-color":
 496                                         xterm_colors = true;
 497                                         break;
 498                                 }
 499                                 if (!xterm_colors)
 500                                         return;
 501
 502                                 if (!(isatty (1) && isatty (2)))
 503                                         return;
 504
 505                                 string config = Environment.GetEnvironmentVariable ("MCS_COLORS");
 506                                 if (config == null){
 507                                         config = "errors=red";
 508                                         //config = "brightwhite,red";
 509                                 }
 510
 511                                 if (config == "disable")
 512                                         return;
 513
 514                                 if (!config.StartsWith ("errors="))
 515                                         return;
 516
 517                                 config = config.Substring (7);
 518
 519                                 int p = config.IndexOf (",");
 520                                 if (p == -1)
 521                                         prefix = GetForeground (config);
 522                                 else
 523                                         prefix = GetBackground (config.Substring (p+1)) + GetForeground (config.Substring (0, p));
 524                                 postfix = "\x001b[0m";
 525                         }
 526
 527                         public ErrorMessage (int code, Location loc, string message, ArrayList extraInfo)
 528                                 : base (code, loc, message, extraInfo)
 529                         {
 530                         }
 531
 532                         public ErrorMessage (AbstractMessage aMsg)
 533                                 : base (aMsg)
 534                         {
 535                         }
 536
 537                         public override string ColorFormat (string s)
 538                         {
 539                                 if (prefix != null)
 540                                         return prefix + s + postfix;
 541                                 return s;
 542                         }
 543
 544                         public override void Print()
 545                         {
 546                                 Errors++;
 547                                 base.Print ();
 548                         }
 549
 550                         public override bool IsWarning {
 551                                 get { return false; }
 552                         }
 553
 554                         public override string MessageType {
 555                                 get {
 556                                         return "error";
 557                                 }
 558                         }
 559                 }
 560
 561                 public static void FeatureIsNotAvailable (Location loc, string feature)
 562                 {
 563                         string version;
 564                         switch (RootContext.Version) {
 565                         case LanguageVersion.ISO_1:
 566                                 version = "1.0";
 567                                 break;
 568                         case LanguageVersion.ISO_2:
 569                                 version = "2.0";
 570                                 break;
 571                         case LanguageVersion.Default_MCS:
 572                                 Report.Error (1644, loc, "Feature `{0}' is not available in Mono mcs compiler. Consider using Mono gmcs compiler instead",
 573                                               feature);
 574                                 return;
 575                         default:
 576                                 throw new InternalErrorException ("Invalid feature version", RootContext.Version);
 577                         }
 578
 579                         Report.Error (1644, loc,
 580                                 "Feature `{0}' cannot be used because it is not part of the C# {1} language specification",
 581                                       feature, version);
 582                 }
 583
 584                 public static string FriendlyStackTrace (Exception e)
 585                 {
 586                         return FriendlyStackTrace (new StackTrace (e, true));
 587                 }
 588
 589                 static string FriendlyStackTrace (StackTrace t)
 590                 {
 591                         StringBuilder sb = new StringBuilder ();
 592
 593                         bool foundUserCode = false;
 594
 595                         for (int i = 0; i < t.FrameCount; i++) {
 596                                 StackFrame f = t.GetFrame (i);
 597                                 MethodBase mb = f.GetMethod ();
 598
 599                                 if (!foundUserCode && mb.ReflectedType == typeof (Report))
 600                                         continue;
 601
 602                                 foundUserCode = true;
 603
 604                                 sb.Append ("\tin ");
 605
 606                                 if (f.GetFileLineNumber () > 0)
 607                                         sb.AppendFormat ("(at {0}:{1}) ", f.GetFileName (), f.GetFileLineNumber ());
 608
 609                                 sb.AppendFormat ("{0}.{1} (", mb.ReflectedType.Name, mb.Name);
 610
 611                                 bool first = true;
 612                                 foreach (ParameterInfo pi in mb.GetParameters ()) {
 613                                         if (!first)
 614                                                 sb.Append (", ");
 615                                         first = false;
 616
 617                                         sb.Append (TypeManager.CSharpName (pi.ParameterType));
 618                                 }
 619                                 sb.Append (")\n");
 620                         }
 621
 622                         return sb.ToString ();
 623                 }
 624
 625                 public static void StackTrace ()
 626                 {
 627                         Console.WriteLine (FriendlyStackTrace (new StackTrace (true)));
 628                 }
 629
 630                 public static bool IsValidWarning (int code)
 631                 {
 632                         return Array.BinarySearch (AllWarnings, code) >= 0;
 633                 }
 634
 635                 static public void RuntimeMissingSupport (Location loc, string feature)
 636                 {
 637                         Report.Error (-88, loc, "Your .NET Runtime does not support `{0}'. Please use the latest Mono runtime instead.", feature);
 638                 }
 639
 640                 /// <summary>
 641                 /// In most error cases is very useful to have information about symbol that caused the error.
 642                 /// Call this method before you call Report.Error when it makes sense.
 643                 /// </summary>
 644                 static public void SymbolRelatedToPreviousError (Location loc, string symbol)
 645                 {
 646                         SymbolRelatedToPreviousError (loc.ToString (), symbol);
 647                 }
 648
 649                 static public void SymbolRelatedToPreviousError (MemberInfo mi)
 650                 {
 651                         if (reporting_disabled)
 652                                 return;
 653
 654                         Type dt = TypeManager.DropGenericTypeArguments (mi.DeclaringType);
 655                         if (TypeManager.IsDelegateType (dt)) {
 656                                 SymbolRelatedToPreviousError (dt);
 657                                 return;
 658                         }
 659
 660                         DeclSpace temp_ds = TypeManager.LookupDeclSpace (dt);
 661                         if (temp_ds == null) {
 662                                 SymbolRelatedToPreviousError (dt.Assembly.Location, TypeManager.GetFullNameSignature (mi));
 663                         } else {
 664                                 MethodBase mb = mi as MethodBase;
 665                                 if (mb != null) {
 666                                         mb = TypeManager.DropGenericMethodArguments (mb);
 667                                         IMethodData md = TypeManager.GetMethod (mb);
 668                                         SymbolRelatedToPreviousError (md.Location, md.GetSignatureForError ());
 669                                         return;
 670                                 }
 671
 672                                 MemberCore mc = temp_ds.GetDefinition (mi.Name);
 673                                 SymbolRelatedToPreviousError (mc);
 674                         }
 675                 }
 676
 677                 static public void SymbolRelatedToPreviousError (MemberCore mc)
 678                 {
 679                         SymbolRelatedToPreviousError (mc.Location, mc.GetSignatureForError ());
 680                 }
 681
 682                 static public void SymbolRelatedToPreviousError (Type type)
 683                 {
 684                         if (reporting_disabled)
 685                                 return;
 686
 687                         type = TypeManager.DropGenericTypeArguments (type);
 688
 689                         if (TypeManager.IsGenericParameter (type)) {
 690                                 TypeParameter tp = TypeManager.LookupTypeParameter (type);
 691                                 if (tp != null) {
 692                                         SymbolRelatedToPreviousError (tp.Location, "");
 693                                         return;
 694                                 }
 695                         }
 696
 697                         if (type is TypeBuilder) {
 698                                 DeclSpace temp_ds = TypeManager.LookupDeclSpace (type);
 699                                 SymbolRelatedToPreviousError (temp_ds.Location, TypeManager.CSharpName (type));
 700                         } else if (type.HasElementType) {
 701                                 SymbolRelatedToPreviousError (type.GetElementType ());
 702                         } else {
 703                                 SymbolRelatedToPreviousError (type.Assembly.Location, TypeManager.CSharpName (type));
 704                         }
 705                 }
 706
 707                 static void SymbolRelatedToPreviousError (string loc, string symbol)
 708                 {
 709                         extra_information.Add (String.Format ("{0} (Location of the symbol related to previous ", loc));
 710                 }
 711
 712                 public static void ExtraInformation (Location loc, string msg)
 713                 {
 714                         extra_information.Add (String.Format ("{0} {1}", loc, msg));
 715                 }
 716
 717                 public static WarningRegions RegisterWarningRegion (Location location)
 718                 {
 719                         if (warning_regions_table == null)
 720                                 warning_regions_table = new Hashtable ();
 721
 722                         WarningRegions regions = (WarningRegions)warning_regions_table [location.Name];
 723                         if (regions == null) {
 724                                 regions = new WarningRegions ();
 725                                 warning_regions_table.Add (location.Name, regions);
 726                         }
 727                         return regions;
 728                 }
 729
 730                 static public void Warning (int code, int level, Location loc, string message)
 731                 {
 732                         WarningMessage w = new WarningMessage (code, level, loc, message, extra_information);
 733                         extra_information.Clear ();
 734                         w.Print ();
 735                 }
 736
 737                 static public void Warning (int code, int level, Location loc, string format, string arg)
 738                 {
 739                         WarningMessage w = new WarningMessage (code, level, loc, String.Format (format, arg), extra_information);
 740                         extra_information.Clear ();
 741                         w.Print ();
 742                 }
 743
 744                 static public void Warning (int code, int level, Location loc, string format, string arg1, string arg2)
 745                 {
 746                         WarningMessage w = new WarningMessage (code, level, loc, String.Format (format, arg1, arg2), extra_information);
 747                         extra_information.Clear ();
 748                         w.Print ();
 749                 }
 750
 751                 static public void Warning (int code, int level, Location loc, string format, params object[] args)
 752                 {
 753                         WarningMessage w = new WarningMessage (code, level, loc, String.Format (format, args), extra_information);
 754                         extra_information.Clear ();
 755                         w.Print ();
 756                 }
 757
 758                 static public void Warning (int code, int level, string message)
 759                 {
 760                         Warning (code, level, Location.Null, message);
 761                 }
 762
 763                 static public void Warning (int code, int level, string format, string arg)
 764                 {
 765                         Warning (code, level, Location.Null, format, arg);
 766                 }
 767
 768                 static public void Warning (int code, int level, string format, string arg1, string arg2)
 769                 {
 770                         Warning (code, level, Location.Null, format, arg1, arg2);
 771                 }
 772
 773                 static public void Warning (int code, int level, string format, params string[] args)
 774                 {
 775                         Warning (code, level, Location.Null, String.Format (format, args));
 776                 }
 777
 778                 static public void Error (int code, Location loc, string error)
 779                 {
 780                         new ErrorMessage (code, loc, error, extra_information).Print ();
 781                         extra_information.Clear ();
 782                 }
 783
 784                 static public void Error (int code, Location loc, string format, string arg)
 785                 {
 786                         new ErrorMessage (code, loc, String.Format (format, arg), extra_information).Print ();
 787                         extra_information.Clear ();
 788                 }
 789
 790                 static public void Error (int code, Location loc, string format, string arg1, string arg2)
 791                 {
 792                         new ErrorMessage (code, loc, String.Format (format, arg1, arg2), extra_information).Print ();
 793                         extra_information.Clear ();
 794                 }
 795
 796                 static public void Error (int code, Location loc, string format, params object[] args)
 797                 {
 798                         Error (code, loc, String.Format (format, args));
 799                 }
 800
 801                 static public void Error (int code, string error)
 802                 {
 803                         Error (code, Location.Null, error);
 804                 }
 805
 806                 static public void Error (int code, string format, string arg)
 807                 {
 808                         Error (code, Location.Null, format, arg);
 809                 }
 810
 811                 static public void Error (int code, string format, string arg1, string arg2)
 812                 {
 813                         Error (code, Location.Null, format, arg1, arg2);
 814                 }
 815
 816                 static public void Error (int code, string format, params string[] args)
 817                 {
 818                         Error (code, Location.Null, String.Format (format, args));
 819                 }
 820
 821                 static public void SetIgnoreWarning (int code)
 822                 {
 823                         if (warning_ignore_table == null)
 824                                 warning_ignore_table = new Hashtable ();
 825
 826                         warning_ignore_table [code] = true;
 827                 }
 828
 829                 static public int ExpectedError {
 830                         set {
 831                                 expected_error = value;
 832                         }
 833                         get {
 834                                 return expected_error;
 835                         }
 836                 }
 837
 838                 public static int WarningLevel {
 839                         get {
 840                                 return warning_level;
 841                         }
 842                         set {
 843                                 warning_level = value;
 844                         }
 845                 }
 846
 847                 public static int DebugFlags = 0;
 848
 849                 [Conditional ("MCS_DEBUG")]
 850                 static public void Debug (string message, params object[] args)
 851                 {
 852                         Debug (4, message, args);
 853                 }
 854
 855                 [Conditional ("MCS_DEBUG")]
 856                 static public void Debug (int category, string message, params object[] args)
 857                 {
 858                         if ((category & DebugFlags) == 0)
 859                                 return;
 860
 861                         StringBuilder sb = new StringBuilder (message);
 862
 863                         if ((args != null) && (args.Length > 0)) {
 864                                 sb.Append (": ");
 865
 866                                 bool first = true;
 867                                 foreach (object arg in args) {
 868                                         if (first)
 869                                                 first = false;
 870                                         else
 871                                                 sb.Append (", ");
 872                                         if (arg == null)
 873                                                 sb.Append ("null");
 874                                         else if (arg is ICollection)
 875                                                 sb.Append (PrintCollection ((ICollection) arg));
 876                                         else
 877                                                 sb.Append (arg);
 878                                 }
 879                         }
 880
 881                         Console.WriteLine (sb.ToString ());
 882                 }
 883
 884                 static public string PrintCollection (ICollection collection)
 885                 {
 886                         StringBuilder sb = new StringBuilder ();
 887
 888                         sb.Append (collection.GetType ());
 889                         sb.Append ("(");
 890
 891                         bool first = true;
 892                         foreach (object o in collection) {
 893                                 if (first)
 894                                         first = false;
 895                                 else
 896                                         sb.Append (", ");
 897                                 sb.Append (o);
 898                         }
 899
 900                         sb.Append (")");
 901                         return sb.ToString ();
 902                 }
 903         }
 904
 905         public enum TimerType {
 906                 FindMembers     = 0,
 907                 TcFindMembers   = 1,
 908                 MemberLookup    = 2,
 909                 CachedLookup    = 3,
 910                 CacheInit       = 4,
 911                 MiscTimer       = 5,
 912                 CountTimers     = 6
 913         }
 914
 915         public enum CounterType {
 916                 FindMembers     = 0,
 917                 MemberCache     = 1,
 918                 MiscCounter     = 2,
 919                 CountCounters   = 3
 920         }
 921
 922         public class Timer
 923         {
 924                 static DateTime[] timer_start;
 925                 static TimeSpan[] timers;
 926                 static long[] timer_counters;
 927                 static long[] counters;
 928
 929                 static Timer ()
 930                 {
 931                         timer_start = new DateTime [(int) TimerType.CountTimers];
 932                         timers = new TimeSpan [(int) TimerType.CountTimers];
 933                         timer_counters = new long [(int) TimerType.CountTimers];
 934                         counters = new long [(int) CounterType.CountCounters];
 935
 936                         for (int i = 0; i < (int) TimerType.CountTimers; i++) {
 937                                 timer_start [i] = DateTime.Now;
 938                                 timers [i] = TimeSpan.Zero;
 939                         }
 940                 }
 941
 942                 [Conditional("TIMER")]
 943                 static public void IncrementCounter (CounterType which)
 944                 {
 945                         ++counters [(int) which];
 946                 }
 947
 948                 [Conditional("TIMER")]
 949                 static public void StartTimer (TimerType which)
 950                 {
 951                         timer_start [(int) which] = DateTime.Now;
 952                 }
 953
 954                 [Conditional("TIMER")]
 955                 static public void StopTimer (TimerType which)
 956                 {
 957                         timers [(int) which] += DateTime.Now - timer_start [(int) which];
 958                         ++timer_counters [(int) which];
 959                 }
 960
 961                 [Conditional("TIMER")]
 962                 static public void ShowTimers ()
 963                 {
 964                         ShowTimer (TimerType.FindMembers, "- FindMembers timer");
 965                         ShowTimer (TimerType.TcFindMembers, "- TypeContainer.FindMembers timer");
 966                         ShowTimer (TimerType.MemberLookup, "- MemberLookup timer");
 967                         ShowTimer (TimerType.CachedLookup, "- CachedLookup timer");
 968                         ShowTimer (TimerType.CacheInit, "- Cache init");
 969                         ShowTimer (TimerType.MiscTimer, "- Misc timer");
 970
 971                         ShowCounter (CounterType.FindMembers, "- Find members");
 972                         ShowCounter (CounterType.MemberCache, "- Member cache");
 973                         ShowCounter (CounterType.MiscCounter, "- Misc counter");
 974                 }
 975
 976                 static public void ShowCounter (CounterType which, string msg)
 977                 {
 978                         Console.WriteLine ("{0} {1}", counters [(int) which], msg);
 979                 }
 980
 981                 static public void ShowTimer (TimerType which, string msg)
 982                 {
 983                         Console.WriteLine (
 984                                 "[{0:00}:{1:000}] {2} (used {3} times)",
 985                                 (int) timers [(int) which].TotalSeconds,
 986                                 timers [(int) which].Milliseconds, msg,
 987                                 timer_counters [(int) which]);
 988                 }
 989         }
 990
 991         public class InternalErrorException : Exception {
 992                 public InternalErrorException (MemberCore mc, Exception e)
 993                         : base (mc.Location + " " + mc.GetSignatureForError (), e)
 994                 {
 995                 }
 996
 997                 public InternalErrorException ()
 998                         : base ("Internal error")
 999                 {
1000                 }
1001
1002                 public InternalErrorException (string message)
1003                         : base (message)
1004                 {
1005                 }
1006
1007                 public InternalErrorException (string message, params object[] args)
1008                         : base (String.Format (message, args))
1009                 { }
1010
1011                 public InternalErrorException (Exception e, Location loc)
1012                         : base (loc.ToString (), e)
1013                 {
1014                 }
1015         }
1016
1017         /// <summary>
1018         /// Handles #pragma warning
1019         /// </summary>
1020         public class WarningRegions {
1021
1022                 abstract class PragmaCmd
1023                 {
1024                         public int Line;
1025
1026                         protected PragmaCmd (int line)
1027                         {
1028                                 Line = line;
1029                         }
1030
1031                         public abstract bool IsEnabled (int code, bool previous);
1032                 }
1033
1034                 class Disable : PragmaCmd
1035                 {
1036                         int code;
1037                         public Disable (int line, int code)
1038                                 : base (line)
1039                         {
1040                                 this.code = code;
1041                         }
1042
1043                         public override bool IsEnabled (int code, bool previous)
1044                         {
1045                                 return this.code == code ? false : previous;
1046                         }
1047                 }
1048
1049                 class DisableAll : PragmaCmd
1050                 {
1051                         public DisableAll (int line)
1052                                 : base (line) {}
1053
1054                         public override bool IsEnabled(int code, bool previous)
1055                         {
1056                                 return false;
1057                         }
1058                 }
1059
1060                 class Enable : PragmaCmd
1061                 {
1062                         int code;
1063                         public Enable (int line, int code)
1064                                 : base (line)
1065                         {
1066                                 this.code = code;
1067                         }
1068
1069                         public override bool IsEnabled(int code, bool previous)
1070                         {
1071                                 return this.code == code ? true : previous;
1072                         }
1073                 }
1074
1075                 class EnableAll : PragmaCmd
1076                 {
1077                         public EnableAll (int line)
1078                                 : base (line) {}
1079
1080                         public override bool IsEnabled(int code, bool previous)
1081                         {
1082                                 return true;
1083                         }
1084                 }
1085
1086
1087                 ArrayList regions = new ArrayList ();
1088
1089                 public void WarningDisable (int line)
1090                 {
1091                         regions.Add (new DisableAll (line));
1092                 }
1093
1094                 public void WarningDisable (Location location, int code)
1095                 {
1096                         if (CheckWarningCode (code, location))
1097                                 regions.Add (new Disable (location.Row, code));
1098                 }
1099
1100                 public void WarningEnable (int line)
1101                 {
1102                         regions.Add (new EnableAll (line));
1103                 }
1104
1105                 public void WarningEnable (Location location, int code)
1106                 {
1107                         if (CheckWarningCode (code, location))
1108                                 regions.Add (new Enable (location.Row, code));
1109                 }
1110
1111                 public bool IsWarningEnabled (int code, int src_line)
1112                 {
1113                         bool result = true;
1114                         foreach (PragmaCmd pragma in regions) {
1115                                 if (src_line < pragma.Line)
1116                                         break;
1117
1118                                 result = pragma.IsEnabled (code, result);
1119                         }
1120                         return result;
1121                 }
1122
1123                 static bool CheckWarningCode (int code, Location loc)
1124                 {
1125                         if (Report.IsValidWarning (code))
1126                                 return true;
1127
1128                         Report.Warning (1691, 1, loc, "`{0}' is not a valid warning number", code.ToString ());
1129                         return false;
1130                 }
1131         }
1132 }