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 // Copyright 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, 464, 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                         error_stack = warning_stack = null;
 122                 }
 123
 124                 public static void DisableReporting ()
 125                 {
 126                         if (error_stack == null)
 127                                 error_stack = new Stack ();
 128                         error_stack.Push (Errors);
 129
 130                         if (Warnings > 0) {
 131                                 if (warning_stack == null)
 132                                         warning_stack = new Stack ();
 133                                 warning_stack.Push (Warnings);
 134                         }
 135
 136                         reporting_disabled = true;
 137                 }
 138
 139                 public static void EnableReporting ()
 140                 {
 141                         if (warning_stack != null)
 142                                 Warnings = (int) warning_stack.Pop ();
 143                         else
 144                                 Warnings = 0;
 145
 146                         Errors = (int) error_stack.Pop ();
 147                         if (error_stack.Count == 0) {
 148                                 reporting_disabled = false;
 149                         }
 150                 }
 151
 152                 public static IMessageRecorder msg_recorder;
 153
 154                 public static IMessageRecorder SetMessageRecorder (IMessageRecorder recorder)
 155                 {
 156                         IMessageRecorder previous = msg_recorder;
 157                         msg_recorder = recorder;
 158                         return previous;
 159                 }
 160
 161                 public interface IMessageRecorder
 162                 {
 163                         void EndSession ();
 164                         void AddMessage (AbstractMessage msg);
 165                         bool PrintMessages ();
 166                 }
 167
 168                 //
 169                 // Default message recorder, it uses two types of message groups.
 170                 // Common messages: messages reported in all sessions.
 171                 // Merged messages: union of all messages in all sessions.
 172                 //
 173                 public struct MessageRecorder : IMessageRecorder
 174                 {
 175                         ArrayList session_messages;
 176                         //
 177                         // A collection of exactly same messages reported in all sessions
 178                         //
 179                         ArrayList common_messages;
 180
 181                         //
 182                         // A collection of unique messages reported in all sessions
 183                         //
 184                         ArrayList merged_messages;
 185
 186                         public void EndSession ()
 187                         {
 188                                 if (session_messages == null)
 189                                         return;
 190
 191                                 //
 192                                 // Handles the first session
 193                                 //
 194                                 if (common_messages == null) {
 195                                         common_messages = new ArrayList (session_messages);
 196                                         merged_messages = session_messages;
 197                                         session_messages = null;
 198                                         return;
 199                                 }
 200
 201                                 //
 202                                 // Store common messages if any
 203                                 //
 204                                 for (int i = 0; i < common_messages.Count; ++i) {
 205                                         AbstractMessage cmsg = (AbstractMessage) common_messages [i];
 206                                         bool common_msg_found = false;
 207                                         foreach (AbstractMessage msg in session_messages) {
 208                                                 if (cmsg.Equals (msg)) {
 209                                                         common_msg_found = true;
 210                                                         break;
 211                                                 }
 212                                         }
 213
 214                                         if (!common_msg_found)
 215                                                 common_messages.RemoveAt (i);
 216                                 }
 217
 218                                 //
 219                                 // Merge session and previous messages
 220                                 //
 221                                 for (int i = 0; i < session_messages.Count; ++i) {
 222                                         AbstractMessage msg = (AbstractMessage) session_messages [i];
 223                                         bool msg_found = false;
 224                                         for (int ii = 0; ii < merged_messages.Count; ++ii) {
 225                                                 if (msg.Equals (merged_messages [ii])) {
 226                                                         msg_found = true;
 227                                                         break;
 228                                                 }
 229                                         }
 230
 231                                         if (!msg_found)
 232                                                 merged_messages.Add (msg);
 233                                 }
 234                         }
 235
 236                         public void AddMessage (AbstractMessage msg)
 237                         {
 238                                 if (session_messages == null)
 239                                         session_messages = new ArrayList ();
 240
 241                                 session_messages.Add (msg);
 242                         }
 243
 244                         //
 245                         // Prints collected messages, common messages have a priority
 246                         //
 247                         public bool PrintMessages ()
 248                         {
 249                                 ArrayList messages_to_print = merged_messages;
 250                                 if (common_messages != null && common_messages.Count > 0) {
 251                                         messages_to_print = common_messages;
 252                                 }
 253
 254                                 if (messages_to_print == null)
 255                                         return false;
 256
 257                                 foreach (AbstractMessage msg in messages_to_print)
 258                                         msg.Print ();
 259
 260                                 return true;
 261                         }
 262                 }
 263
 264                 public abstract class AbstractMessage
 265                 {
 266                         readonly string[] extra_info;
 267                         protected readonly int code;
 268                         protected readonly Location location;
 269                         readonly string message;
 270
 271                         protected AbstractMessage (int code, Location loc, string msg, ArrayList extraInfo)
 272                         {
 273                                 this.code = code;
 274                                 if (code < 0)
 275                                         this.code = 8000 - code;
 276
 277                                 this.location = loc;
 278                                 this.message = msg;
 279                                 if (extraInfo.Count != 0) {
 280                                         this.extra_info = (string[])extraInfo.ToArray (typeof (string));
 281                                 }
 282                         }
 283
 284                         protected AbstractMessage (AbstractMessage aMsg)
 285                         {
 286                                 this.code = aMsg.code;
 287                                 this.location = aMsg.location;
 288                                 this.message = aMsg.message;
 289                                 this.extra_info = aMsg.extra_info;
 290                         }
 291
 292                         static void Check (int code)
 293                         {
 294                                 if (code == expected_error) {
 295                                         Environment.Exit (0);
 296                                 }
 297                         }
 298
 299                         public override bool Equals (object obj)
 300                         {
 301                                 AbstractMessage msg = obj as AbstractMessage;
 302                                 if (msg == null)
 303                                         return false;
 304
 305                                 return code == msg.code && location.Equals (msg.location) && message == msg.message;
 306                         }
 307
 308                         public override int GetHashCode ()
 309                         {
 310                                 return code.GetHashCode ();
 311                         }
 312
 313                         public abstract bool IsWarning { get; }
 314
 315                         public abstract string MessageType { get; }
 316
 317                         public virtual void Print ()
 318                         {
 319                                 if (msg_recorder != null) {
 320                                         //
 321                                         // This line is useful when debugging messages recorder
 322                                         //
 323                                         // Console.WriteLine ("RECORDING: {0} {1} {2}", code, location, message);
 324                                         msg_recorder.AddMessage (this);
 325                                         return;
 326                                 }
 327
 328                                 if (reporting_disabled)
 329                                         return;
 330
 331                                 StringBuilder msg = new StringBuilder ();
 332                                 if (!location.IsNull) {
 333                                         msg.Append (location.ToString ());
 334                                         msg.Append (" ");
 335                                 }
 336                                 msg.AppendFormat ("{0} CS{1:0000}: {2}", MessageType, code, message);
 337
 338                                 //
 339                                 //
 340                                 if (Stderr == Console.Error)
 341                                         Stderr.WriteLine (ColorFormat (msg.ToString ()));
 342                                 else
 343                                         Stderr.WriteLine (msg.ToString ());
 344
 345                                 if (extra_info != null) {
 346                                         foreach (string s in extra_info)
 347                                                 Stderr.WriteLine (s + MessageType + ")");
 348                                 }
 349
 350                                 if (Stacktrace)
 351                                         Console.WriteLine (FriendlyStackTrace (new StackTrace (true)));
 352
 353                                 if (Fatal) {
 354                                         if (!IsWarning || WarningsAreErrors)
 355                                                 throw new Exception (message);
 356                                 }
 357
 358                                 Check (code);
 359                         }
 360
 361                         protected virtual string ColorFormat (string s)
 362                         {
 363                                 return s;
 364                         }
 365                 }
 366
 367                 sealed class WarningMessage : AbstractMessage
 368                 {
 369                         readonly int Level;
 370
 371                         public WarningMessage (int code, int level, Location loc, string message, ArrayList extra_info)
 372                                 : base (code, loc, message, extra_info)
 373                         {
 374                                 Level = level;
 375                         }
 376
 377                         public override bool IsWarning {
 378                                 get { return true; }
 379                         }
 380
 381                         bool IsEnabled ()
 382                         {
 383                                 if (WarningLevel < Level)
 384                                         return false;
 385
 386                                 if (warning_ignore_table != null) {
 387                                         if (warning_ignore_table.Contains (code)) {
 388                                                 return false;
 389                                         }
 390                                 }
 391
 392                                 if (warning_regions_table == null || location.IsNull)
 393                                         return true;
 394
 395                                 WarningRegions regions = (WarningRegions)warning_regions_table [location.Name];
 396                                 if (regions == null)
 397                                         return true;
 398
 399                                 return regions.IsWarningEnabled (code, location.Row);
 400                         }
 401
 402                         public override void Print ()
 403                         {
 404                                 if (!IsEnabled ())
 405                                         return;
 406
 407                                 if (WarningsAreErrors) {
 408                                         new ErrorMessage (this).Print ();
 409                                         return;
 410                                 }
 411
 412                                 Warnings++;
 413                                 base.Print ();
 414                         }
 415
 416                         public override string MessageType {
 417                                 get {
 418                                         return "warning";
 419                                 }
 420                         }
 421                 }
 422
 423                 static int NameToCode (string s)
 424                 {
 425                         switch (s){
 426                         case "black":
 427                                 return 0;
 428                         case "red":
 429                                 return 1;
 430                         case "green":
 431                                 return 2;
 432                         case "yellow":
 433                                 return 3;
 434                         case "blue":
 435                                 return 4;
 436                         case "magenta":
 437                                 return 5;
 438                         case "cyan":
 439                                 return 6;
 440                         case "grey":
 441                         case "white":
 442                                 return 7;
 443                         }
 444                         return 7;
 445                 }
 446
 447                 //
 448                 // maps a color name to its xterm color code
 449                 //
 450                 static string GetForeground (string s)
 451                 {
 452                         string highcode;
 453
 454                         if (s.StartsWith ("bright")){
 455                                 highcode = "1;";
 456                                 s = s.Substring (6);
 457                         } else
 458                                 highcode = "";
 459
 460                         return "\x001b[" + highcode + (30 + NameToCode (s)).ToString () + "m";
 461                 }
 462
 463                 static string GetBackground (string s)
 464                 {
 465                         return "\x001b[" + (40 + NameToCode (s)).ToString () + "m";
 466                 }
 467
 468                 sealed class ErrorMessage : AbstractMessage
 469                 {
 470                         static string prefix, postfix;
 471
 472                         [System.Runtime.InteropServices.DllImport ("libc", EntryPoint="isatty")]
 473                         extern static int _isatty (int fd);
 474
 475                         static bool isatty (int fd)
 476                         {
 477                                 try {
 478                                         return _isatty (fd) == 1;
 479                                 } catch {
 480                                         return false;
 481                                 }
 482                         }
 483
 484                         static ErrorMessage ()
 485                         {
 486                                 string term = Environment.GetEnvironmentVariable ("TERM");
 487                                 bool xterm_colors = false;
 488
 489                                 switch (term){
 490                                 case "xterm":
 491                                 case "rxvt":
 492                                 case "rxvt-unicode":
 493                                         if (Environment.GetEnvironmentVariable ("COLORTERM") != null){
 494                                                 xterm_colors = true;
 495                                         }
 496                                         break;
 497
 498                                 case "xterm-color":
 499                                         xterm_colors = true;
 500                                         break;
 501                                 }
 502                                 if (!xterm_colors)
 503                                         return;
 504
 505                                 if (!(isatty (1) && isatty (2)))
 506                                         return;
 507
 508                                 string config = Environment.GetEnvironmentVariable ("MCS_COLORS");
 509                                 if (config == null){
 510                                         config = "errors=red";
 511                                         //config = "brightwhite,red";
 512                                 }
 513
 514                                 if (config == "disable")
 515                                         return;
 516
 517                                 if (!config.StartsWith ("errors="))
 518                                         return;
 519
 520                                 config = config.Substring (7);
 521
 522                                 int p = config.IndexOf (",");
 523                                 if (p == -1)
 524                                         prefix = GetForeground (config);
 525                                 else
 526                                         prefix = GetBackground (config.Substring (p+1)) + GetForeground (config.Substring (0, p));
 527                                 postfix = "\x001b[0m";
 528                         }
 529
 530                         public ErrorMessage (int code, Location loc, string message, ArrayList extraInfo)
 531                                 : base (code, loc, message, extraInfo)
 532                         {
 533                         }
 534
 535                         public ErrorMessage (AbstractMessage aMsg)
 536                                 : base (aMsg)
 537                         {
 538                         }
 539
 540                         protected override string ColorFormat (string s)
 541                         {
 542                                 if (prefix != null)
 543                                         return prefix + s + postfix;
 544                                 return s;
 545                         }
 546
 547                         public override void Print()
 548                         {
 549                                 Errors++;
 550                                 base.Print ();
 551                         }
 552
 553                         public override bool IsWarning {
 554                                 get { return false; }
 555                         }
 556
 557                         public override string MessageType {
 558                                 get {
 559                                         return "error";
 560                                 }
 561                         }
 562                 }
 563
 564                 public static void FeatureIsNotAvailable (Location loc, string feature)
 565                 {
 566                         string version;
 567                         switch (RootContext.Version) {
 568                         case LanguageVersion.ISO_1:
 569                                 version = "1.0";
 570                                 break;
 571                         case LanguageVersion.ISO_2:
 572                                 version = "2.0";
 573                                 break;
 574                         case LanguageVersion.Default_MCS:
 575                                 Report.Error (1644, loc, "Feature `{0}' is not available in Mono mcs1 compiler. Consider using the `gmcs' compiler instead",
 576                                               feature);
 577                                 return;
 578                         default:
 579                                 throw new InternalErrorException ("Invalid feature version", RootContext.Version);
 580                         }
 581
 582                         Report.Error (1644, loc,
 583                                 "Feature `{0}' cannot be used because it is not part of the C# {1} language specification",
 584                                       feature, version);
 585                 }
 586
 587                 public static string FriendlyStackTrace (Exception e)
 588                 {
 589                         return FriendlyStackTrace (new StackTrace (e, true));
 590                 }
 591
 592                 static string FriendlyStackTrace (StackTrace t)
 593                 {
 594                         StringBuilder sb = new StringBuilder ();
 595
 596                         bool foundUserCode = false;
 597
 598                         for (int i = 0; i < t.FrameCount; i++) {
 599                                 StackFrame f = t.GetFrame (i);
 600                                 MethodBase mb = f.GetMethod ();
 601
 602                                 if (!foundUserCode && mb.ReflectedType == typeof (Report))
 603                                         continue;
 604
 605                                 foundUserCode = true;
 606
 607                                 sb.Append ("\tin ");
 608
 609                                 if (f.GetFileLineNumber () > 0)
 610                                         sb.AppendFormat ("(at {0}:{1}) ", f.GetFileName (), f.GetFileLineNumber ());
 611
 612                                 sb.AppendFormat ("{0}.{1} (", mb.ReflectedType.Name, mb.Name);
 613
 614                                 bool first = true;
 615                                 foreach (ParameterInfo pi in mb.GetParameters ()) {
 616                                         if (!first)
 617                                                 sb.Append (", ");
 618                                         first = false;
 619
 620                                         sb.Append (TypeManager.CSharpName (pi.ParameterType));
 621                                 }
 622                                 sb.Append (")\n");
 623                         }
 624
 625                         return sb.ToString ();
 626                 }
 627
 628                 public static void StackTrace ()
 629                 {
 630                         Console.WriteLine (FriendlyStackTrace (new StackTrace (true)));
 631                 }
 632
 633                 public static bool IsValidWarning (int code)
 634                 {
 635                         return Array.BinarySearch (AllWarnings, code) >= 0;
 636                 }
 637
 638                 static public void RuntimeMissingSupport (Location loc, string feature)
 639                 {
 640                         Report.Error (-88, loc, "Your .NET Runtime does not support `{0}'. Please use the latest Mono runtime instead.", feature);
 641                 }
 642
 643                 /// <summary>
 644                 /// In most error cases is very useful to have information about symbol that caused the error.
 645                 /// Call this method before you call Report.Error when it makes sense.
 646                 /// </summary>
 647                 static public void SymbolRelatedToPreviousError (Location loc, string symbol)
 648                 {
 649                         SymbolRelatedToPreviousError (loc.ToString (), symbol);
 650                 }
 651
 652                 static public void SymbolRelatedToPreviousError (MemberInfo mi)
 653                 {
 654                         if (reporting_disabled)
 655                                 return;
 656
 657                         Type dt = TypeManager.DropGenericTypeArguments (mi.DeclaringType);
 658                         if (TypeManager.IsDelegateType (dt)) {
 659                                 SymbolRelatedToPreviousError (dt);
 660                                 return;
 661                         }
 662
 663                         DeclSpace temp_ds = TypeManager.LookupDeclSpace (dt);
 664                         if (temp_ds == null) {
 665                                 SymbolRelatedToPreviousError (dt.Assembly.Location, TypeManager.GetFullNameSignature (mi));
 666                         } else {
 667                                 MethodBase mb = mi as MethodBase;
 668                                 if (mb != null) {
 669                                         mb = TypeManager.DropGenericMethodArguments (mb);
 670                                         IMethodData md = TypeManager.GetMethod (mb);
 671                                         SymbolRelatedToPreviousError (md.Location, md.GetSignatureForError ());
 672                                         return;
 673                                 }
 674
 675                                 MemberCore mc = temp_ds.GetDefinition (mi.Name);
 676                                 SymbolRelatedToPreviousError (mc);
 677                         }
 678                 }
 679
 680                 static public void SymbolRelatedToPreviousError (MemberCore mc)
 681                 {
 682                         SymbolRelatedToPreviousError (mc.Location, mc.GetSignatureForError ());
 683                 }
 684
 685                 static public void SymbolRelatedToPreviousError (Type type)
 686                 {
 687                         if (reporting_disabled)
 688                                 return;
 689
 690                         type = TypeManager.DropGenericTypeArguments (type);
 691
 692                         if (TypeManager.IsGenericParameter (type)) {
 693                                 TypeParameter tp = TypeManager.LookupTypeParameter (type);
 694                                 if (tp != null) {
 695                                         SymbolRelatedToPreviousError (tp.Location, "");
 696                                         return;
 697                                 }
 698                         }
 699
 700                         if (type is TypeBuilder) {
 701                                 DeclSpace temp_ds = TypeManager.LookupDeclSpace (type);
 702                                 SymbolRelatedToPreviousError (temp_ds.Location, TypeManager.CSharpName (type));
 703                         } else if (TypeManager.HasElementType (type)) {
 704                                 SymbolRelatedToPreviousError (type.GetElementType ());
 705                         } else {
 706                                 SymbolRelatedToPreviousError (type.Assembly.Location, TypeManager.CSharpName (type));
 707                         }
 708                 }
 709
 710                 static void SymbolRelatedToPreviousError (string loc, string symbol)
 711                 {
 712                         extra_information.Add (String.Format ("{0} (Location of the symbol related to previous ", loc));
 713                 }
 714
 715                 public static void ExtraInformation (Location loc, string msg)
 716                 {
 717                         extra_information.Add (String.Format ("{0} {1}", loc, msg));
 718                 }
 719
 720                 public static WarningRegions RegisterWarningRegion (Location location)
 721                 {
 722                         if (warning_regions_table == null)
 723                                 warning_regions_table = new Hashtable ();
 724
 725                         WarningRegions regions = (WarningRegions)warning_regions_table [location.Name];
 726                         if (regions == null) {
 727                                 regions = new WarningRegions ();
 728                                 warning_regions_table.Add (location.Name, regions);
 729                         }
 730                         return regions;
 731                 }
 732
 733                 static public void Warning (int code, int level, Location loc, string message)
 734                 {
 735                         WarningMessage w = new WarningMessage (code, level, loc, message, extra_information);
 736                         extra_information.Clear ();
 737                         w.Print ();
 738                 }
 739
 740                 static public void Warning (int code, int level, Location loc, string format, string arg)
 741                 {
 742                         WarningMessage w = new WarningMessage (code, level, loc, String.Format (format, arg), extra_information);
 743                         extra_information.Clear ();
 744                         w.Print ();
 745                 }
 746
 747                 static public void Warning (int code, int level, Location loc, string format, string arg1, string arg2)
 748                 {
 749                         WarningMessage w = new WarningMessage (code, level, loc, String.Format (format, arg1, arg2), extra_information);
 750                         extra_information.Clear ();
 751                         w.Print ();
 752                 }
 753
 754                 static public void Warning (int code, int level, Location loc, string format, params object[] args)
 755                 {
 756                         WarningMessage w = new WarningMessage (code, level, loc, String.Format (format, args), extra_information);
 757                         extra_information.Clear ();
 758                         w.Print ();
 759                 }
 760
 761                 static public void Warning (int code, int level, string message)
 762                 {
 763                         Warning (code, level, Location.Null, message);
 764                 }
 765
 766                 static public void Warning (int code, int level, string format, string arg)
 767                 {
 768                         Warning (code, level, Location.Null, format, arg);
 769                 }
 770
 771                 static public void Warning (int code, int level, string format, string arg1, string arg2)
 772                 {
 773                         Warning (code, level, Location.Null, format, arg1, arg2);
 774                 }
 775
 776                 static public void Warning (int code, int level, string format, params string[] args)
 777                 {
 778                         Warning (code, level, Location.Null, String.Format (format, args));
 779                 }
 780
 781                 static public void Error (int code, Location loc, string error)
 782                 {
 783                         new ErrorMessage (code, loc, error, extra_information).Print ();
 784                         extra_information.Clear ();
 785                 }
 786
 787                 static public void Error (int code, Location loc, string format, string arg)
 788                 {
 789                         new ErrorMessage (code, loc, String.Format (format, arg), extra_information).Print ();
 790                         extra_information.Clear ();
 791                 }
 792
 793                 static public void Error (int code, Location loc, string format, string arg1, string arg2)
 794                 {
 795                         new ErrorMessage (code, loc, String.Format (format, arg1, arg2), extra_information).Print ();
 796                         extra_information.Clear ();
 797                 }
 798
 799                 static public void Error (int code, Location loc, string format, params object[] args)
 800                 {
 801                         Error (code, loc, String.Format (format, args));
 802                 }
 803
 804                 static public void Error (int code, string error)
 805                 {
 806                         Error (code, Location.Null, error);
 807                 }
 808
 809                 static public void Error (int code, string format, string arg)
 810                 {
 811                         Error (code, Location.Null, format, arg);
 812                 }
 813
 814                 static public void Error (int code, string format, string arg1, string arg2)
 815                 {
 816                         Error (code, Location.Null, format, arg1, arg2);
 817                 }
 818
 819                 static public void Error (int code, string format, params string[] args)
 820                 {
 821                         Error (code, Location.Null, String.Format (format, args));
 822                 }
 823
 824                 static public void SetIgnoreWarning (int code)
 825                 {
 826                         if (warning_ignore_table == null)
 827                                 warning_ignore_table = new Hashtable ();
 828
 829                         warning_ignore_table [code] = true;
 830                 }
 831
 832                 static public int ExpectedError {
 833                         set {
 834                                 expected_error = value;
 835                         }
 836                         get {
 837                                 return expected_error;
 838                         }
 839                 }
 840
 841                 public static int WarningLevel {
 842                         get {
 843                                 return warning_level;
 844                         }
 845                         set {
 846                                 warning_level = value;
 847                         }
 848                 }
 849
 850                 public static int DebugFlags = 0;
 851
 852                 [Conditional ("MCS_DEBUG")]
 853                 static public void Debug (string message, params object[] args)
 854                 {
 855                         Debug (4, message, args);
 856                 }
 857
 858                 [Conditional ("MCS_DEBUG")]
 859                 static public void Debug (int category, string message, params object[] args)
 860                 {
 861                         if ((category & DebugFlags) == 0)
 862                                 return;
 863
 864                         StringBuilder sb = new StringBuilder (message);
 865
 866                         if ((args != null) && (args.Length > 0)) {
 867                                 sb.Append (": ");
 868
 869                                 bool first = true;
 870                                 foreach (object arg in args) {
 871                                         if (first)
 872                                                 first = false;
 873                                         else
 874                                                 sb.Append (", ");
 875                                         if (arg == null)
 876                                                 sb.Append ("null");
 877                                         else if (arg is ICollection)
 878                                                 sb.Append (PrintCollection ((ICollection) arg));
 879                                         else
 880                                                 sb.Append (arg);
 881                                 }
 882                         }
 883
 884                         Console.WriteLine (sb.ToString ());
 885                 }
 886
 887                 static public string PrintCollection (ICollection collection)
 888                 {
 889                         StringBuilder sb = new StringBuilder ();
 890
 891                         sb.Append (collection.GetType ());
 892                         sb.Append ("(");
 893
 894                         bool first = true;
 895                         foreach (object o in collection) {
 896                                 if (first)
 897                                         first = false;
 898                                 else
 899                                         sb.Append (", ");
 900                                 sb.Append (o);
 901                         }
 902
 903                         sb.Append (")");
 904                         return sb.ToString ();
 905                 }
 906         }
 907
 908         public enum TimerType {
 909                 FindMembers     = 0,
 910                 TcFindMembers   = 1,
 911                 MemberLookup    = 2,
 912                 CachedLookup    = 3,
 913                 CacheInit       = 4,
 914                 MiscTimer       = 5,
 915                 CountTimers     = 6
 916         }
 917
 918         public enum CounterType {
 919                 FindMembers     = 0,
 920                 MemberCache     = 1,
 921                 MiscCounter     = 2,
 922                 CountCounters   = 3
 923         }
 924
 925         public class Timer
 926         {
 927                 static DateTime[] timer_start;
 928                 static TimeSpan[] timers;
 929                 static long[] timer_counters;
 930                 static long[] counters;
 931
 932                 static Timer ()
 933                 {
 934                         timer_start = new DateTime [(int) TimerType.CountTimers];
 935                         timers = new TimeSpan [(int) TimerType.CountTimers];
 936                         timer_counters = new long [(int) TimerType.CountTimers];
 937                         counters = new long [(int) CounterType.CountCounters];
 938
 939                         for (int i = 0; i < (int) TimerType.CountTimers; i++) {
 940                                 timer_start [i] = DateTime.Now;
 941                                 timers [i] = TimeSpan.Zero;
 942                         }
 943                 }
 944
 945                 [Conditional("TIMER")]
 946                 static public void IncrementCounter (CounterType which)
 947                 {
 948                         ++counters [(int) which];
 949                 }
 950
 951                 [Conditional("TIMER")]
 952                 static public void StartTimer (TimerType which)
 953                 {
 954                         timer_start [(int) which] = DateTime.Now;
 955                 }
 956
 957                 [Conditional("TIMER")]
 958                 static public void StopTimer (TimerType which)
 959                 {
 960                         timers [(int) which] += DateTime.Now - timer_start [(int) which];
 961                         ++timer_counters [(int) which];
 962                 }
 963
 964                 [Conditional("TIMER")]
 965                 static public void ShowTimers ()
 966                 {
 967                         ShowTimer (TimerType.FindMembers, "- FindMembers timer");
 968                         ShowTimer (TimerType.TcFindMembers, "- TypeContainer.FindMembers timer");
 969                         ShowTimer (TimerType.MemberLookup, "- MemberLookup timer");
 970                         ShowTimer (TimerType.CachedLookup, "- CachedLookup timer");
 971                         ShowTimer (TimerType.CacheInit, "- Cache init");
 972                         ShowTimer (TimerType.MiscTimer, "- Misc timer");
 973
 974                         ShowCounter (CounterType.FindMembers, "- Find members");
 975                         ShowCounter (CounterType.MemberCache, "- Member cache");
 976                         ShowCounter (CounterType.MiscCounter, "- Misc counter");
 977                 }
 978
 979                 static public void ShowCounter (CounterType which, string msg)
 980                 {
 981                         Console.WriteLine ("{0} {1}", counters [(int) which], msg);
 982                 }
 983
 984                 static public void ShowTimer (TimerType which, string msg)
 985                 {
 986                         Console.WriteLine (
 987                                 "[{0:00}:{1:000}] {2} (used {3} times)",
 988                                 (int) timers [(int) which].TotalSeconds,
 989                                 timers [(int) which].Milliseconds, msg,
 990                                 timer_counters [(int) which]);
 991                 }
 992         }
 993
 994         public class InternalErrorException : Exception {
 995                 public InternalErrorException (MemberCore mc, Exception e)
 996                         : base (mc.Location + " " + mc.GetSignatureForError (), e)
 997                 {
 998                 }
 999
1000                 public InternalErrorException ()
1001                         : base ("Internal error")
1002                 {
1003                 }
1004
1005                 public InternalErrorException (string message)
1006                         : base (message)
1007                 {
1008                 }
1009
1010                 public InternalErrorException (string message, params object[] args)
1011                         : base (String.Format (message, args))
1012                 { }
1013
1014                 public InternalErrorException (Exception e, Location loc)
1015                         : base (loc.ToString (), e)
1016                 {
1017                 }
1018         }
1019
1020         /// <summary>
1021         /// Handles #pragma warning
1022         /// </summary>
1023         public class WarningRegions {
1024
1025                 abstract class PragmaCmd
1026                 {
1027                         public int Line;
1028
1029                         protected PragmaCmd (int line)
1030                         {
1031                                 Line = line;
1032                         }
1033
1034                         public abstract bool IsEnabled (int code, bool previous);
1035                 }
1036
1037                 class Disable : PragmaCmd
1038                 {
1039                         int code;
1040                         public Disable (int line, int code)
1041                                 : base (line)
1042                         {
1043                                 this.code = code;
1044                         }
1045
1046                         public override bool IsEnabled (int code, bool previous)
1047                         {
1048                                 return this.code == code ? false : previous;
1049                         }
1050                 }
1051
1052                 class DisableAll : PragmaCmd
1053                 {
1054                         public DisableAll (int line)
1055                                 : base (line) {}
1056
1057                         public override bool IsEnabled(int code, bool previous)
1058                         {
1059                                 return false;
1060                         }
1061                 }
1062
1063                 class Enable : PragmaCmd
1064                 {
1065                         int code;
1066                         public Enable (int line, int code)
1067                                 : base (line)
1068                         {
1069                                 this.code = code;
1070                         }
1071
1072                         public override bool IsEnabled(int code, bool previous)
1073                         {
1074                                 return this.code == code ? true : previous;
1075                         }
1076                 }
1077
1078                 class EnableAll : PragmaCmd
1079                 {
1080                         public EnableAll (int line)
1081                                 : base (line) {}
1082
1083                         public override bool IsEnabled(int code, bool previous)
1084                         {
1085                                 return true;
1086                         }
1087                 }
1088
1089
1090                 ArrayList regions = new ArrayList ();
1091
1092                 public void WarningDisable (int line)
1093                 {
1094                         regions.Add (new DisableAll (line));
1095                 }
1096
1097                 public void WarningDisable (Location location, int code)
1098                 {
1099                         if (CheckWarningCode (code, location))
1100                                 regions.Add (new Disable (location.Row, code));
1101                 }
1102
1103                 public void WarningEnable (int line)
1104                 {
1105                         regions.Add (new EnableAll (line));
1106                 }
1107
1108                 public void WarningEnable (Location location, int code)
1109                 {
1110                         if (CheckWarningCode (code, location))
1111                                 regions.Add (new Enable (location.Row, code));
1112                 }
1113
1114                 public bool IsWarningEnabled (int code, int src_line)
1115                 {
1116                         bool result = true;
1117                         foreach (PragmaCmd pragma in regions) {
1118                                 if (src_line < pragma.Line)
1119                                         break;
1120
1121                                 result = pragma.IsEnabled (code, result);
1122                         }
1123                         return result;
1124                 }
1125
1126                 static bool CheckWarningCode (int code, Location loc)
1127                 {
1128                         if (Report.IsValidWarning (code))
1129                                 return true;
1130
1131                         Report.Warning (1691, 1, loc, "`{0}' is not a valid warning number", code.ToString ());
1132                         return false;
1133                 }
1134         }
1135 }