mcs/mcs/report.cs

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