1------------------------------------------------------------------------------ 2-- -- 3-- GNAT COMPILER COMPONENTS -- 4-- -- 5-- E R R O U T C -- 6-- -- 7-- S p e c -- 8-- -- 9-- Copyright (C) 1992-2019, Free Software Foundation, Inc. -- 10-- -- 11-- GNAT is free software; you can redistribute it and/or modify it under -- 12-- terms of the GNU General Public License as published by the Free Soft- -- 13-- ware Foundation; either version 3, or (at your option) any later ver- -- 14-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- 15-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- 16-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- 17-- for more details. You should have received a copy of the GNU General -- 18-- Public License distributed with GNAT; see file COPYING3. If not, go to -- 19-- http://www.gnu.org/licenses for a complete copy of the license. -- 20-- -- 21-- GNAT was originally developed by the GNAT team at New York University. -- 22-- Extensive contributions were provided by Ada Core Technologies Inc. -- 23-- -- 24------------------------------------------------------------------------------ 25 26-- This packages contains global variables and routines common to error 27-- reporting packages, including Errout and Prj.Err. 28 29with Table; 30with Types; use Types; 31 32package Erroutc is 33 34 Class_Flag : Boolean := False; 35 -- This flag is set True when outputting a reference to a class-wide 36 -- type, and is used by Add_Class to insert 'Class at the proper point 37 38 Continuation : Boolean := False; 39 -- Indicates if current message is a continuation. Initialized from the 40 -- Msg_Cont parameter in Error_Msg_Internal and then set True if a \ 41 -- insertion character is encountered. 42 43 Continuation_New_Line : Boolean := False; 44 -- Indicates if current message was a continuation line marked with \\ to 45 -- force a new line. Set True if \\ encountered. 46 47 Flag_Source : Source_File_Index; 48 -- Source file index for source file where error is being posted 49 50 Has_Double_Exclam : Boolean := False; 51 -- Set true to indicate that the current message contains the insertion 52 -- sequence !! (force warnings even in non-main unit source files). 53 54 Is_Serious_Error : Boolean := False; 55 -- Set True for a serious error (i.e. any message that is not a warning 56 -- or style message, and that does not contain a | insertion character). 57 58 Is_Unconditional_Msg : Boolean := False; 59 -- Set True to indicate that the current message contains the insertion 60 -- character ! and is thus to be treated as an unconditional message. 61 62 Is_Warning_Msg : Boolean := False; 63 -- Set True to indicate if current message is warning message (contains ? 64 -- or contains < and Error_Msg_Warn is True. 65 66 Is_Info_Msg : Boolean := False; 67 -- Set True to indicate that the current message starts with the characters 68 -- "info: " and is to be treated as an information message. This string 69 -- will be prepended to the message and all its continuations. 70 71 Is_Check_Msg : Boolean := False; 72 -- Set True to indicate that the current message starts with one of 73 -- "high: ", "medium: ", "low: " and is to be treated as a check message. 74 75 Warning_Msg_Char : Character; 76 -- Warning character, valid only if Is_Warning_Msg is True 77 -- ' ' -- ? or < appeared on its own in message 78 -- '?' -- ?? or << appeared in message 79 -- 'x' -- ?x? or <x< appeared in message (x = a .. z) 80 -- 'X' -- ?X? or <X< appeared in message (X = A .. Z) 81 -- '*' -- ?*? or <*< appeared in message 82 -- '$' -- ?$? or <$< appeared in message 83 -- In the case of the < sequences, this is set only if the message is 84 -- actually a warning, i.e. if Error_Msg_Warn is True 85 86 Is_Style_Msg : Boolean := False; 87 -- Set True to indicate if the current message is a style message 88 -- (i.e. a message whose text starts with the characters "(style)"). 89 90 Kill_Message : Boolean := False; 91 -- A flag used to kill weird messages (e.g. those containing uninterpreted 92 -- implicit type references) if we have already seen at least one message 93 -- already. The idea is that we hope the weird message is a junk cascaded 94 -- message that should be suppressed. 95 96 Last_Killed : Boolean := False; 97 -- Set True if the most recently posted non-continuation message was 98 -- killed. This is used to determine the processing of any continuation 99 -- messages that follow. 100 101 List_Pragmas_Index : Int := 0; 102 -- Index into List_Pragmas table 103 104 List_Pragmas_Mode : Boolean := False; 105 -- Starts True, gets set False by pragma List (Off), True by List (On) 106 107 Manual_Quote_Mode : Boolean := False; 108 -- Set True in manual quotation mode 109 110 Max_Msg_Length : constant := 1024 + 2 * Int (Column_Number'Last); 111 -- Maximum length of error message. The addition of 2 * Column_Number'Last 112 -- ensures that two insertion tokens of maximum length can be accommodated. 113 -- The value of 1024 is an arbitrary value that should be more than long 114 -- enough to accommodate any reasonable message (and for that matter, some 115 -- pretty unreasonable messages). 116 117 Msg_Buffer : String (1 .. Max_Msg_Length); 118 -- Buffer used to prepare error messages 119 120 Msglen : Integer := 0; 121 -- Number of characters currently stored in the message buffer 122 123 Suppress_Message : Boolean; 124 -- A flag used to suppress certain obviously redundant messages (i.e. 125 -- those referring to a node whose type is Any_Type). This suppression 126 -- is effective only if All_Errors_Mode is off. 127 128 Suppress_Instance_Location : Boolean := False; 129 -- Normally, if a # location in a message references a location within 130 -- a generic template, then a note is added giving the location of the 131 -- instantiation. If this variable is set True, then this note is not 132 -- output. This is used for internal processing for the case of an 133 -- illegal instantiation. See Error_Msg routine for further details. 134 135 type Subprogram_Name_Type is access function (N : Node_Id) return String; 136 Subprogram_Name_Ptr : Subprogram_Name_Type; 137 -- Indirect call to Sem_Util.Subprogram_Name to break circular 138 -- dependency with the static elaboration model. 139 140 ---------------------------- 141 -- Message ID Definitions -- 142 ---------------------------- 143 144 type Error_Msg_Id is new Int; 145 -- A type used to represent specific error messages. Used by the clients 146 -- of this package only in the context of the Get_Error_Id and 147 -- Change_Error_Text subprograms. 148 149 No_Error_Msg : constant Error_Msg_Id := 0; 150 -- A constant which is different from any value returned by Get_Error_Id. 151 -- Typically used by a client to indicate absence of a saved Id value. 152 153 Cur_Msg : Error_Msg_Id := No_Error_Msg; 154 -- Id of most recently posted error message 155 156 function Get_Msg_Id return Error_Msg_Id; 157 -- Returns the Id of the message most recently posted using one of the 158 -- Error_Msg routines. 159 160 function Get_Location (E : Error_Msg_Id) return Source_Ptr; 161 -- Returns the flag location of the error message with the given id E 162 163 ----------------------------------- 164 -- Error Message Data Structures -- 165 ----------------------------------- 166 167 -- The error messages are stored as a linked list of error message objects 168 -- sorted into ascending order by the source location (Sloc). Each object 169 -- records the text of the message and its source location. 170 171 -- The following record type and table are used to represent error 172 -- messages, with one entry in the table being allocated for each message. 173 174 type Error_Msg_Object is record 175 Text : String_Ptr; 176 -- Text of error message, fully expanded with all insertions 177 178 Next : Error_Msg_Id; 179 -- Pointer to next message in error chain. A value of No_Error_Msg 180 -- indicates the end of the chain. 181 182 Prev : Error_Msg_Id; 183 -- Pointer to previous message in error chain. Only set during the 184 -- Finalize procedure. A value of No_Error_Msg indicates the first 185 -- message in the chain. 186 187 Sfile : Source_File_Index; 188 -- Source table index of source file. In the case of an error that 189 -- refers to a template, always references the original template 190 -- not an instantiation copy. 191 192 Sptr : Source_Ptr; 193 -- Flag pointer. In the case of an error that refers to a template, 194 -- always references the original template, not an instantiation copy. 195 -- This value is the actual place in the source that the error message 196 -- will be posted. Note that an error placed on an instantiation will 197 -- have Sptr pointing to the instantiation point. 198 199 Optr : Source_Ptr; 200 -- Flag location used in the call to post the error. This is the same as 201 -- Sptr, except when an error is posted on a particular instantiation of 202 -- a generic. In such a case, Sptr will point to the original source 203 -- location of the instantiation itself, but Optr will point to the 204 -- template location (more accurately to the template copy in the 205 -- instantiation copy corresponding to the instantiation referenced by 206 -- Sptr). 207 208 Line : Physical_Line_Number; 209 -- Line number for error message 210 211 Col : Column_Number; 212 -- Column number for error message 213 214 Warn : Boolean; 215 -- True if warning message 216 217 Info : Boolean; 218 -- True if info message 219 220 Check : Boolean; 221 -- True if check message 222 223 Warn_Err : Boolean; 224 -- True if this is a warning message which is to be treated as an error 225 -- as a result of a match with a Warning_As_Error pragma. 226 227 Warn_Chr : Character; 228 -- Warning character (note: set even if Warning_Doc_Switch is False) 229 -- ' ' -- ? or < appeared on its own in message 230 -- '?' -- ?? or << appeared in message 231 -- 'x' -- ?x? or <x< appeared in message (x = a .. z) 232 -- 'X' -- ?X? or <X< appeared in message (X = A .. Z) 233 -- '*' -- ?*? or <*< appeared in message 234 -- '$' -- ?$? or <$< appeared in message 235 -- In the case of the < sequences, this is set only if the message is 236 -- actually a warning, i.e. if Error_Msg_Warn is True 237 238 Style : Boolean; 239 -- True if style message (starts with "(style)") 240 241 Serious : Boolean; 242 -- True if serious error message (not a warning and no | character) 243 244 Uncond : Boolean; 245 -- True if unconditional message (i.e. insertion character ! appeared) 246 247 Msg_Cont : Boolean; 248 -- This is used for logical messages that are composed of multiple 249 -- individual messages. For messages that are not part of such a 250 -- group, or that are the first message in such a group. Msg_Cont 251 -- is set to False. For subsequent messages in a group, Msg_Cont 252 -- is set to True. This is used to make sure that such a group of 253 -- messages is either suppressed or retained as a group (e.g. in 254 -- the circuit that deletes identical messages). 255 256 Deleted : Boolean; 257 -- If this flag is set, the message is not printed. This is used 258 -- in the circuit for deleting duplicate/redundant error messages. 259 260 Node : Node_Id; 261 -- If set, points to the node relevant for this message which will be 262 -- used to compute the enclosing subprogram name if 263 -- Opt.Include_Subprogram_In_Messages is set. 264 end record; 265 266 package Errors is new Table.Table ( 267 Table_Component_Type => Error_Msg_Object, 268 Table_Index_Type => Error_Msg_Id, 269 Table_Low_Bound => 1, 270 Table_Initial => 200, 271 Table_Increment => 200, 272 Table_Name => "Error"); 273 274 First_Error_Msg : Error_Msg_Id; 275 -- The list of error messages, i.e. the first entry on the list of error 276 -- messages. This is not the same as the physically first entry in the 277 -- error message table, since messages are not always inserted in sequence. 278 279 Last_Error_Msg : Error_Msg_Id; 280 -- The last entry on the list of error messages. Note: this is not the same 281 -- as the physically last entry in the error message table, since messages 282 -- are not always inserted in sequence. 283 284 -------------------------- 285 -- Warning Mode Control -- 286 -------------------------- 287 288 -- Pragma Warnings allows warnings to be turned off for a specified region 289 -- of code, and the following tables are the data structures used to keep 290 -- track of these regions. 291 292 -- The first table is used for the basic command line control, and for the 293 -- forms of Warning with a single ON or OFF parameter. 294 295 -- It contains pairs of source locations, the first being the start 296 -- location for a warnings off region, and the second being the end 297 -- location. When a pragma Warnings (Off) is encountered, a new entry is 298 -- established extending from the location of the pragma to the end of the 299 -- current source file. A subsequent pragma Warnings (On) adjusts the end 300 -- point of this entry appropriately. 301 302 -- If all warnings are suppressed by command switch, then there is a dummy 303 -- entry (put there by Errout.Initialize) at the start of the table which 304 -- covers all possible Source_Ptr values. Note that the source pointer 305 -- values in this table always reference the original template, not an 306 -- instantiation copy, in the generic case. 307 308 -- Reason is the reason from the pragma Warnings (Off,..) or the null 309 -- string if no reason parameter is given. 310 311 type Warnings_Entry is record 312 Start : Source_Ptr; 313 Stop : Source_Ptr; 314 Reason : String_Id; 315 end record; 316 317 package Warnings is new Table.Table ( 318 Table_Component_Type => Warnings_Entry, 319 Table_Index_Type => Natural, 320 Table_Low_Bound => 1, 321 Table_Initial => 100, 322 Table_Increment => 200, 323 Table_Name => "Warnings"); 324 325 -- The second table is used for the specific forms of the pragma, where 326 -- the first argument is ON or OFF, and the second parameter is a string 327 -- which is the pattern to match for suppressing a warning. 328 329 type Specific_Warning_Entry is record 330 Start : Source_Ptr; 331 Stop : Source_Ptr; 332 -- Starting and ending source pointers for the range. These are always 333 -- from the same source file. 334 335 Reason : String_Id; 336 -- Reason string from pragma Warnings, or null string if none 337 338 Msg : String_Ptr; 339 -- Message from pragma Warnings (Off, string) 340 341 Open : Boolean; 342 -- Set to True if OFF has been encountered with no matching ON 343 344 Used : Boolean; 345 -- Set to True if entry has been used to suppress a warning 346 347 Config : Boolean; 348 -- True if pragma is configuration pragma (in which case no matching Off 349 -- pragma is required, and it is not required that a specific warning be 350 -- suppressed). 351 end record; 352 353 package Specific_Warnings is new Table.Table ( 354 Table_Component_Type => Specific_Warning_Entry, 355 Table_Index_Type => Natural, 356 Table_Low_Bound => 1, 357 Table_Initial => 100, 358 Table_Increment => 200, 359 Table_Name => "Specific_Warnings"); 360 361 -- Note on handling configuration case versus specific case. A complication 362 -- arises from this example: 363 364 -- pragma Warnings (Off, "not referenced*"); 365 -- procedure Mumble (X : Integer) is 366 -- pragma Warnings (On, "not referenced*"); 367 -- begin 368 -- null; 369 -- end Mumble; 370 371 -- The trouble is that the first pragma is technically a configuration 372 -- pragma, and yet it is clearly being used in the context of thinking of 373 -- it as a specific case. To deal with this, what we do is that the On 374 -- entry can match a configuration pragma from the same file, and if we 375 -- find such an On entry, we cancel the indication of it being the 376 -- configuration case. This seems to handle all cases we run into ok. 377 378 ----------------- 379 -- Subprograms -- 380 ----------------- 381 382 procedure Add_Class; 383 -- Add 'Class to buffer for class wide type case (Class_Flag set) 384 385 function Buffer_Ends_With (C : Character) return Boolean; 386 -- Tests if message buffer ends with given character 387 388 function Buffer_Ends_With (S : String) return Boolean; 389 -- Tests if message buffer ends with given string preceded by a space 390 391 procedure Buffer_Remove (C : Character); 392 -- Remove given character fron end of buffer if it is present 393 394 procedure Buffer_Remove (S : String); 395 -- Removes given string from end of buffer if it is present at end of 396 -- buffer, and preceded by a space. 397 398 function Compilation_Errors return Boolean; 399 -- Returns true if errors have been detected, or warnings in -gnatwe 400 -- (treat warnings as errors) mode. 401 402 procedure dmsg (Id : Error_Msg_Id); 403 -- Debugging routine to dump an error message 404 405 procedure Debug_Output (N : Node_Id); 406 -- Called from Error_Msg_N and Error_Msg_NE to generate line of debug 407 -- output giving node number (of node N) if the debug X switch is set. 408 409 procedure Check_Duplicate_Message (M1, M2 : Error_Msg_Id); 410 -- This function is passed the Id values of two error messages. If either 411 -- M1 or M2 is a continuation message, or is already deleted, the call is 412 -- ignored. Otherwise a check is made to see if M1 and M2 are duplicated or 413 -- redundant. If so, the message to be deleted and all its continuations 414 -- are marked with the Deleted flag set to True. 415 416 function Get_Warning_Tag (Id : Error_Msg_Id) return String; 417 -- Given an error message ID, return tag showing warning message class, or 418 -- the null string if this option is not enabled or this is not a warning. 419 420 procedure Output_Error_Msgs (E : in out Error_Msg_Id); 421 -- Output source line, error flag, and text of stored error message and all 422 -- subsequent messages for the same line and unit. On return E is set to be 423 -- one higher than the last message output. 424 425 procedure Output_Line_Number (L : Logical_Line_Number); 426 -- Output a line number as six digits (with leading zeroes suppressed), 427 -- followed by a period and a blank (note that this is 8 characters which 428 -- means that tabs in the source line will not get messed up). Line numbers 429 -- that match or are less than the last Source_Reference pragma are listed 430 -- as all blanks, avoiding output of junk line numbers. 431 432 procedure Output_Msg_Text (E : Error_Msg_Id); 433 -- Outputs characters of text in the text of the error message E. Note that 434 -- no end of line is output, the caller is responsible for adding the end 435 -- of line. If Error_Msg_Line_Length is non-zero, this is the routine that 436 -- splits the line generating multiple lines of output, and in this case 437 -- the last line has no terminating end of line character. 438 439 procedure Prescan_Message (Msg : String); 440 -- Scans message text and sets the following variables: 441 -- 442 -- Is_Warning_Msg is set True if Msg is a warning message (contains a 443 -- question mark character), and False otherwise. 444 -- 445 -- Is_Style_Msg is set True if Msg is a style message (starts with 446 -- "(style)") and False otherwise. 447 -- 448 -- Is_Info_Msg is set True if Msg is an information message (starts 449 -- with "info: ". Such messages must contain a ? sequence since they 450 -- are also considered to be warning messages, and get a tag. 451 -- 452 -- Is_Serious_Error is set to True unless the message is a warning or 453 -- style message or contains the character | (non-serious error). 454 -- 455 -- Is_Unconditional_Msg is set True if the message contains the character 456 -- ! and is otherwise set False. 457 -- 458 -- Has_Double_Exclam is set True if the message contains the sequence !! 459 -- and is otherwise set False. 460 -- 461 -- We need to know right away these aspects of a message, since we will 462 -- test these values before doing the full error scan. 463 -- 464 -- Note that the call has no effect for continuation messages (those whose 465 -- first character is '\'), and all variables are left unchanged. 466 467 procedure Purge_Messages (From : Source_Ptr; To : Source_Ptr); 468 -- All error messages whose location is in the range From .. To (not 469 -- including the end points) will be deleted from the error listing. 470 471 function Same_Error (M1, M2 : Error_Msg_Id) return Boolean; 472 -- See if two messages have the same text. Returns true if the text of the 473 -- two messages is identical, or if one of them is the same as the other 474 -- with an appended "instance at xxx" tag. 475 476 procedure Set_Msg_Blank; 477 -- Sets a single blank in the message if the preceding character is a 478 -- non-blank character other than a left parenthesis or minus. Has no 479 -- effect if manual quote mode is turned on. 480 481 procedure Set_Msg_Blank_Conditional; 482 -- Sets a single blank in the message if the preceding character is a 483 -- non-blank character other than a left parenthesis or quote. Has no 484 -- effect if manual quote mode is turned on. 485 486 procedure Set_Msg_Char (C : Character); 487 -- Add a single character to the current message. This routine does not 488 -- check for special insertion characters (they are just treated as text 489 -- characters if they occur). 490 491 procedure Set_Msg_Insertion_File_Name; 492 -- Handle file name insertion (left brace insertion character) 493 494 procedure Set_Msg_Insertion_Line_Number (Loc, Flag : Source_Ptr); 495 -- Handle line number insertion (# insertion character). Loc is the 496 -- location to be referenced, and Flag is the location at which the 497 -- flag is posted (used to determine whether to add "in file xxx") 498 499 procedure Set_Msg_Insertion_Name_Literal; 500 501 procedure Set_Msg_Insertion_Name; 502 -- Handle name insertion (% insertion character) 503 504 procedure Set_Msg_Insertion_Reserved_Name; 505 -- Handle insertion of reserved word name (* insertion character) 506 507 procedure Set_Msg_Insertion_Reserved_Word 508 (Text : String; 509 J : in out Integer); 510 -- Handle reserved word insertion (upper case letters). The Text argument 511 -- is the current error message input text, and J is an index which on 512 -- entry points to the first character of the reserved word, and on exit 513 -- points past the last character of the reserved word. Note that RM and 514 -- SPARK are treated specially and not considered to be keywords. 515 516 procedure Set_Msg_Insertion_Run_Time_Name; 517 -- If package System contains a definition for Run_Time_Name (see package 518 -- Targparm for details), then this procedure will insert a message of 519 -- the form (name) into the current error message, with name set in mixed 520 -- case (upper case after any spaces). If no run time name is defined, 521 -- then this routine has no effect). 522 523 procedure Set_Msg_Insertion_Uint; 524 -- Handle Uint insertion (^ insertion character) 525 526 procedure Set_Msg_Int (Line : Int); 527 -- Set the decimal representation of the argument in the error message 528 -- buffer with no leading zeroes output. 529 530 procedure Set_Msg_Name_Buffer; 531 -- Output name from Name_Buffer, with surrounding quotes unless manual 532 -- quotation mode is in effect. 533 534 procedure Set_Msg_Quote; 535 -- Set quote if in normal quote mode, nothing if in manual quote mode 536 537 procedure Set_Msg_Str (Text : String); 538 -- Add a sequence of characters to the current message. This routine does 539 -- not check for special insertion characters (they are just treated as 540 -- text characters if they occur). It does perform the transformation of 541 -- the special strings _xxx (xxx = Pre/Post/Type_Invariant) to xxx'Class. 542 543 procedure Set_Next_Non_Deleted_Msg (E : in out Error_Msg_Id); 544 -- Given a message id, move to next message id, but skip any deleted 545 -- messages, so that this results in E on output being the first non- 546 -- deleted message following the input value of E, or No_Error_Msg if 547 -- the input value of E was either already No_Error_Msg, or was the 548 -- last non-deleted message. 549 550 procedure Set_Specific_Warning_Off 551 (Loc : Source_Ptr; 552 Msg : String; 553 Reason : String_Id; 554 Config : Boolean; 555 Used : Boolean := False); 556 -- This is called in response to the two argument form of pragma Warnings 557 -- where the first argument is OFF, and the second argument is a string 558 -- which identifies a specific warning to be suppressed. The first argument 559 -- is the start of the suppression range, and the second argument is the 560 -- string from the pragma. Loc is the location of the pragma (which is the 561 -- start of the range to suppress). Reason is the reason string from the 562 -- pragma, or the null string if no reason is given. Config is True for the 563 -- configuration pragma case (where there is no requirement for a matching 564 -- OFF pragma). Used is set True to disable the check that the warning 565 -- actually has the effect of suppressing a warning. 566 567 procedure Set_Specific_Warning_On 568 (Loc : Source_Ptr; 569 Msg : String; 570 Err : out Boolean); 571 -- This is called in response to the two argument form of pragma Warnings 572 -- where the first argument is ON, and the second argument is a string 573 -- which identifies a specific warning to be suppressed. The first argument 574 -- is the end of the suppression range, and the second argument is the 575 -- string from the pragma. Err is set to True on return to report the error 576 -- of no matching Warnings Off pragma preceding this one. 577 578 procedure Set_Warnings_Mode_Off (Loc : Source_Ptr; Reason : String_Id); 579 -- Called in response to a pragma Warnings (Off) to record the source 580 -- location from which warnings are to be turned off. Reason is the 581 -- Reason from the pragma, or the null string if none is given. 582 583 procedure Set_Warnings_Mode_On (Loc : Source_Ptr); 584 -- Called in response to a pragma Warnings (On) to record the source 585 -- location from which warnings are to be turned back on. 586 587 function Warnings_Suppressed (Loc : Source_Ptr) return String_Id; 588 -- Determines if given location is covered by a warnings off suppression 589 -- range in the warnings table (or is suppressed by compilation option, 590 -- which generates a warning range for the whole source file). This routine 591 -- only deals with the general ON/OFF case, not specific warnings. The 592 -- returned result is No_String if warnings are not suppressed. If warnings 593 -- are suppressed for the given location, then corresponding Reason 594 -- parameter from the pragma is returned (or the null string if no Reason 595 -- parameter was present). 596 597 function Warning_Specifically_Suppressed 598 (Loc : Source_Ptr; 599 Msg : String_Ptr; 600 Tag : String := "") return String_Id; 601 -- Determines if given message to be posted at given location is suppressed 602 -- by specific ON/OFF Warnings pragmas specifying this particular message. 603 -- If the warning is not suppressed then No_String is returned, otherwise 604 -- the corresponding warning string is returned (or the null string if no 605 -- Warning argument was present in the pragma). Tag is the error message 606 -- tag for the message in question or the null string if there is no tag. 607 -- 608 -- Note: we have a null default for Tag to deal with calls from an old 609 -- branch of gnat2why, which does not know about tags in the calls but 610 -- which uses the latest version of erroutc. 611 612 function Warning_Treated_As_Error (Msg : String) return Boolean; 613 -- Returns True if the warning message Msg matches any of the strings 614 -- given by Warning_As_Error pragmas, as stored in the Warnings_As_Errors 615 -- table. 616 617 type Error_Msg_Proc is 618 access procedure (Msg : String; Flag_Location : Source_Ptr); 619 procedure Validate_Specific_Warnings (Eproc : Error_Msg_Proc); 620 -- Checks that specific warnings are consistent (for non-configuration 621 -- case, properly closed, and used). The argument is a pointer to the 622 -- Error_Msg procedure to be called if any inconsistencies are detected. 623 624end Erroutc; 625