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