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) 1992-2020, 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 Has_Insertion_Line : Boolean := False; 55 -- Set True to indicate that the current message contains the insertion 56 -- character # (insert line number reference). 57 58 Is_Compile_Time_Msg : Boolean := False; 59 -- Set true to indicate that the current message originates from a 60 -- Compile_Time_Warning or Compile_Time_Error pragma. 61 62 Is_Serious_Error : Boolean := False; 63 -- Set True for a serious error (i.e. any message that is not a warning 64 -- or style message, and that does not contain a | insertion character). 65 66 Is_Unconditional_Msg : Boolean := False; 67 -- Set True to indicate that the current message contains the insertion 68 -- character ! and is thus to be treated as an unconditional message. 69 70 Is_Warning_Msg : Boolean := False; 71 -- Set True to indicate if current message is warning message (contains ? 72 -- or contains < and Error_Msg_Warn is True. 73 74 Is_Info_Msg : Boolean := False; 75 -- Set True to indicate that the current message starts with the characters 76 -- "info: " and is to be treated as an information message. This string 77 -- will be prepended to the message and all its continuations. 78 79 Is_Check_Msg : Boolean := False; 80 -- Set True to indicate that the current message starts with one of 81 -- "high: ", "medium: ", "low: " and is to be treated as a check message. 82 83 Warning_Msg_Char : Character; 84 -- Warning character, valid only if Is_Warning_Msg is True 85 -- ' ' -- ? or < appeared on its own in message 86 -- '?' -- ?? or << appeared in message 87 -- 'x' -- ?x? or <x< appeared in message (x = a .. z) 88 -- 'X' -- ?X? or <X< appeared in message (X = A .. Z) 89 -- '*' -- ?*? or <*< appeared in message 90 -- '$' -- ?$? or <$< appeared in message 91 -- In the case of the < sequences, this is set only if the message is 92 -- actually a warning, i.e. if Error_Msg_Warn is True 93 94 Is_Style_Msg : Boolean := False; 95 -- Set True to indicate if the current message is a style message 96 -- (i.e. a message whose text starts with the characters "(style)"). 97 98 Kill_Message : Boolean := False; 99 -- A flag used to kill weird messages (e.g. those containing uninterpreted 100 -- implicit type references) if we have already seen at least one message 101 -- already. The idea is that we hope the weird message is a junk cascaded 102 -- message that should be suppressed. 103 104 Last_Killed : Boolean := False; 105 -- Set True if the most recently posted non-continuation message was 106 -- killed. This is used to determine the processing of any continuation 107 -- messages that follow. 108 109 List_Pragmas_Index : Int := 0; 110 -- Index into List_Pragmas table 111 112 List_Pragmas_Mode : Boolean := False; 113 -- Starts True, gets set False by pragma List (Off), True by List (On) 114 115 Manual_Quote_Mode : Boolean := False; 116 -- Set True in manual quotation mode 117 118 Max_Msg_Length : constant := 1024 + 2 * Int (Column_Number'Last); 119 -- Maximum length of error message. The addition of 2 * Column_Number'Last 120 -- ensures that two insertion tokens of maximum length can be accommodated. 121 -- The value of 1024 is an arbitrary value that should be more than long 122 -- enough to accommodate any reasonable message (and for that matter, some 123 -- pretty unreasonable messages). 124 125 Msg_Buffer : String (1 .. Max_Msg_Length); 126 -- Buffer used to prepare error messages 127 128 Msglen : Integer := 0; 129 -- Number of characters currently stored in the message buffer 130 131 Suppress_Message : Boolean; 132 -- A flag used to suppress certain obviously redundant messages (i.e. 133 -- those referring to a node whose type is Any_Type). This suppression 134 -- is effective only if All_Errors_Mode is off. 135 136 Suppress_Instance_Location : Boolean := False; 137 -- Normally, if a # location in a message references a location within 138 -- a generic template, then a note is added giving the location of the 139 -- instantiation. If this variable is set True, then this note is not 140 -- output. This is used for internal processing for the case of an 141 -- illegal instantiation. See Error_Msg routine for further details. 142 143 type Subprogram_Name_Type is access function (N : Node_Id) return String; 144 Subprogram_Name_Ptr : Subprogram_Name_Type; 145 -- Indirect call to Sem_Util.Subprogram_Name to break circular 146 -- dependency with the static elaboration model. 147 148 ---------------------------- 149 -- Message ID Definitions -- 150 ---------------------------- 151 152 type Error_Msg_Id is new Int; 153 -- A type used to represent specific error messages. Used by the clients 154 -- of this package only in the context of the Get_Error_Id and 155 -- Change_Error_Text subprograms. 156 157 No_Error_Msg : constant Error_Msg_Id := 0; 158 -- A constant which is different from any value returned by Get_Error_Id. 159 -- Typically used by a client to indicate absence of a saved Id value. 160 161 Cur_Msg : Error_Msg_Id := No_Error_Msg; 162 -- Id of most recently posted error message 163 164 function Get_Msg_Id return Error_Msg_Id; 165 -- Returns the Id of the message most recently posted using one of the 166 -- Error_Msg routines. 167 168 function Get_Location (E : Error_Msg_Id) return Source_Ptr; 169 -- Returns the flag location of the error message with the given id E 170 171 ----------------------------------- 172 -- Error Message Data Structures -- 173 ----------------------------------- 174 175 -- The error messages are stored as a linked list of error message objects 176 -- sorted into ascending order by the source location (Sloc). Each object 177 -- records the text of the message and its source location. 178 179 -- The following record type and table are used to represent error 180 -- messages, with one entry in the table being allocated for each message. 181 182 type Error_Msg_Object is record 183 Text : String_Ptr; 184 -- Text of error message, fully expanded with all insertions 185 186 Next : Error_Msg_Id; 187 -- Pointer to next message in error chain. A value of No_Error_Msg 188 -- indicates the end of the chain. 189 190 Prev : Error_Msg_Id; 191 -- Pointer to previous message in error chain. Only set during the 192 -- Finalize procedure. A value of No_Error_Msg indicates the first 193 -- message in the chain. 194 195 Sfile : Source_File_Index; 196 -- Source table index of source file. In the case of an error that 197 -- refers to a template, always references the original template 198 -- not an instantiation copy. 199 200 Sptr : Source_Ptr; 201 -- Flag pointer. In the case of an error that refers to a template, 202 -- always references the original template, not an instantiation copy. 203 -- This value is the actual place in the source that the error message 204 -- will be posted. Note that an error placed on an instantiation will 205 -- have Sptr pointing to the instantiation point. 206 207 Optr : Source_Ptr; 208 -- Flag location used in the call to post the error. This is the same as 209 -- Sptr, except when an error is posted on a particular instantiation of 210 -- a generic. In such a case, Sptr will point to the original source 211 -- location of the instantiation itself, but Optr will point to the 212 -- template location (more accurately to the template copy in the 213 -- instantiation copy corresponding to the instantiation referenced by 214 -- Sptr). 215 216 Insertion_Sloc : Source_Ptr; 217 -- Location in message for insertion character # when used 218 219 Line : Physical_Line_Number; 220 -- Line number for error message 221 222 Col : Column_Number; 223 -- Column number for error message 224 225 Compile_Time_Pragma : Boolean; 226 -- True if the message originates from a Compile_Time_Warning or 227 -- Compile_Time_Error pragma 228 229 Warn : Boolean; 230 -- True if warning message 231 232 Info : Boolean; 233 -- True if info message 234 235 Check : Boolean; 236 -- True if check message 237 238 Warn_Err : Boolean; 239 -- True if this is a warning message which is to be treated as an error 240 -- as a result of a match with a Warning_As_Error pragma. 241 242 Warn_Chr : Character; 243 -- Warning character (note: set even if Warning_Doc_Switch is False) 244 -- ' ' -- ? or < appeared on its own in message 245 -- '?' -- ?? or << appeared in message 246 -- 'x' -- ?x? or <x< appeared in message (x = a .. z) 247 -- 'X' -- ?X? or <X< appeared in message (X = A .. Z) 248 -- '*' -- ?*? or <*< appeared in message 249 -- '$' -- ?$? or <$< appeared in message 250 -- In the case of the < sequences, this is set only if the message is 251 -- actually a warning, i.e. if Error_Msg_Warn is True 252 253 Style : Boolean; 254 -- True if style message (starts with "(style)") 255 256 Serious : Boolean; 257 -- True if serious error message (not a warning and no | character) 258 259 Uncond : Boolean; 260 -- True if unconditional message (i.e. insertion character ! appeared) 261 262 Msg_Cont : Boolean; 263 -- This is used for logical messages that are composed of multiple 264 -- individual messages. For messages that are not part of such a 265 -- group, or that are the first message in such a group. Msg_Cont 266 -- is set to False. For subsequent messages in a group, Msg_Cont 267 -- is set to True. This is used to make sure that such a group of 268 -- messages is either suppressed or retained as a group (e.g. in 269 -- the circuit that deletes identical messages). 270 271 Deleted : Boolean; 272 -- If this flag is set, the message is not printed. This is used 273 -- in the circuit for deleting duplicate/redundant error messages. 274 275 Node : Node_Id; 276 -- If set, points to the node relevant for this message which will be 277 -- used to compute the enclosing subprogram name if 278 -- Opt.Include_Subprogram_In_Messages is set. 279 end record; 280 281 package Errors is new Table.Table ( 282 Table_Component_Type => Error_Msg_Object, 283 Table_Index_Type => Error_Msg_Id, 284 Table_Low_Bound => 1, 285 Table_Initial => 200, 286 Table_Increment => 200, 287 Table_Name => "Error"); 288 289 First_Error_Msg : Error_Msg_Id; 290 -- The list of error messages, i.e. the first entry on the list of error 291 -- messages. This is not the same as the physically first entry in the 292 -- error message table, since messages are not always inserted in sequence. 293 294 Last_Error_Msg : Error_Msg_Id; 295 -- The last entry on the list of error messages. Note: this is not the same 296 -- as the physically last entry in the error message table, since messages 297 -- are not always inserted in sequence. 298 299 -------------------------- 300 -- Warning Mode Control -- 301 -------------------------- 302 303 -- Pragma Warnings allows warnings to be turned off for a specified region 304 -- of code, and the following tables are the data structures used to keep 305 -- track of these regions. 306 307 -- The first table is used for the basic command line control, and for the 308 -- forms of Warning with a single ON or OFF parameter. 309 310 -- It contains pairs of source locations, the first being the start 311 -- location for a warnings off region, and the second being the end 312 -- location. When a pragma Warnings (Off) is encountered, a new entry is 313 -- established extending from the location of the pragma to the end of the 314 -- current source file. A subsequent pragma Warnings (On) adjusts the end 315 -- point of this entry appropriately. 316 317 -- If all warnings are suppressed by command switch, then there is a dummy 318 -- entry (put there by Errout.Initialize) at the start of the table which 319 -- covers all possible Source_Ptr values. Note that the source pointer 320 -- values in this table always reference the original template, not an 321 -- instantiation copy, in the generic case. 322 323 -- Reason is the reason from the pragma Warnings (Off,..) or the null 324 -- string if no reason parameter is given. 325 326 type Warnings_Entry is record 327 Start : Source_Ptr; 328 Stop : Source_Ptr; 329 Reason : String_Id; 330 end record; 331 332 package Warnings is new Table.Table ( 333 Table_Component_Type => Warnings_Entry, 334 Table_Index_Type => Natural, 335 Table_Low_Bound => 1, 336 Table_Initial => 100, 337 Table_Increment => 200, 338 Table_Name => "Warnings"); 339 340 -- The second table is used for the specific forms of the pragma, where 341 -- the first argument is ON or OFF, and the second parameter is a string 342 -- which is the pattern to match for suppressing a warning. 343 344 type Specific_Warning_Entry is record 345 Start : Source_Ptr; 346 Stop : Source_Ptr; 347 -- Starting and ending source pointers for the range. These are always 348 -- from the same source file. 349 350 Reason : String_Id; 351 -- Reason string from pragma Warnings, or null string if none 352 353 Msg : String_Ptr; 354 -- Message from pragma Warnings (Off, string) 355 356 Open : Boolean; 357 -- Set to True if OFF has been encountered with no matching ON 358 359 Used : Boolean; 360 -- Set to True if entry has been used to suppress a warning 361 362 Config : Boolean; 363 -- True if pragma is configuration pragma (in which case no matching Off 364 -- pragma is required, and it is not required that a specific warning be 365 -- suppressed). 366 end record; 367 368 package Specific_Warnings is new Table.Table ( 369 Table_Component_Type => Specific_Warning_Entry, 370 Table_Index_Type => Natural, 371 Table_Low_Bound => 1, 372 Table_Initial => 100, 373 Table_Increment => 200, 374 Table_Name => "Specific_Warnings"); 375 376 -- Note on handling configuration case versus specific case. A complication 377 -- arises from this example: 378 379 -- pragma Warnings (Off, "not referenced*"); 380 -- procedure Mumble (X : Integer) is 381 -- pragma Warnings (On, "not referenced*"); 382 -- begin 383 -- null; 384 -- end Mumble; 385 386 -- The trouble is that the first pragma is technically a configuration 387 -- pragma, and yet it is clearly being used in the context of thinking of 388 -- it as a specific case. To deal with this, what we do is that the On 389 -- entry can match a configuration pragma from the same file, and if we 390 -- find such an On entry, we cancel the indication of it being the 391 -- configuration case. This seems to handle all cases we run into ok. 392 393 ----------------- 394 -- Subprograms -- 395 ----------------- 396 397 procedure Add_Class; 398 -- Add 'Class to buffer for class wide type case (Class_Flag set) 399 400 function Buffer_Ends_With (C : Character) return Boolean; 401 -- Tests if message buffer ends with given character 402 403 function Buffer_Ends_With (S : String) return Boolean; 404 -- Tests if message buffer ends with given string preceded by a space 405 406 procedure Buffer_Remove (C : Character); 407 -- Remove given character fron end of buffer if it is present 408 409 procedure Buffer_Remove (S : String); 410 -- Removes given string from end of buffer if it is present at end of 411 -- buffer, and preceded by a space. 412 413 function Compilation_Errors return Boolean; 414 -- Returns true if errors have been detected, or warnings in -gnatwe 415 -- (treat warnings as errors) mode. 416 417 procedure dmsg (Id : Error_Msg_Id); 418 -- Debugging routine to dump an error message 419 420 procedure Debug_Output (N : Node_Id); 421 -- Called from Error_Msg_N and Error_Msg_NE to generate line of debug 422 -- output giving node number (of node N) if the debug X switch is set. 423 424 procedure Check_Duplicate_Message (M1, M2 : Error_Msg_Id); 425 -- This function is passed the Id values of two error messages. If either 426 -- M1 or M2 is a continuation message, or is already deleted, the call is 427 -- ignored. Otherwise a check is made to see if M1 and M2 are duplicated or 428 -- redundant. If so, the message to be deleted and all its continuations 429 -- are marked with the Deleted flag set to True. 430 431 function Count_Compile_Time_Pragma_Warnings return Int; 432 -- Returns the number of warnings in the Errors table that were triggered 433 -- by a Compile_Time_Warning pragma. 434 435 function Get_Warning_Tag (Id : Error_Msg_Id) return String; 436 -- Given an error message ID, return tag showing warning message class, or 437 -- the null string if this option is not enabled or this is not a warning. 438 439 procedure Output_Error_Msgs (E : in out Error_Msg_Id); 440 -- Output source line, error flag, and text of stored error message and all 441 -- subsequent messages for the same line and unit. On return E is set to be 442 -- one higher than the last message output. 443 444 procedure Output_Line_Number (L : Logical_Line_Number); 445 -- Output a line number as six digits (with leading zeroes suppressed), 446 -- followed by a period and a blank (note that this is 8 characters which 447 -- means that tabs in the source line will not get messed up). Line numbers 448 -- that match or are less than the last Source_Reference pragma are listed 449 -- as all blanks, avoiding output of junk line numbers. 450 451 procedure Output_Msg_Text (E : Error_Msg_Id); 452 -- Outputs characters of text in the text of the error message E. Note that 453 -- no end of line is output, the caller is responsible for adding the end 454 -- of line. If Error_Msg_Line_Length is non-zero, this is the routine that 455 -- splits the line generating multiple lines of output, and in this case 456 -- the last line has no terminating end of line character. 457 458 procedure Prescan_Message (Msg : String); 459 -- Scans message text and sets the following variables: 460 -- 461 -- Is_Warning_Msg is set True if Msg is a warning message (contains a 462 -- question mark character), and False otherwise. 463 -- 464 -- Is_Style_Msg is set True if Msg is a style message (starts with 465 -- "(style)") and False otherwise. 466 -- 467 -- Is_Info_Msg is set True if Msg is an information message (starts 468 -- with "info: ". Such messages must contain a ? sequence since they 469 -- are also considered to be warning messages, and get a tag. 470 -- 471 -- Is_Serious_Error is set to True unless the message is a warning or 472 -- style message or contains the character | (non-serious error). 473 -- 474 -- Is_Unconditional_Msg is set True if the message contains the character 475 -- ! and is otherwise set False. 476 -- 477 -- Has_Double_Exclam is set True if the message contains the sequence !! 478 -- and is otherwise set False. 479 -- 480 -- Has_Insertion_Line is set True if the message contains the character # 481 -- and is otherwise set False. 482 -- 483 -- We need to know right away these aspects of a message, since we will 484 -- test these values before doing the full error scan. 485 -- 486 -- Note that the call has no effect for continuation messages (those whose 487 -- first character is '\'), and all variables are left unchanged, unless 488 -- -gnatdF is set. 489 490 procedure Purge_Messages (From : Source_Ptr; To : Source_Ptr); 491 -- All error messages whose location is in the range From .. To (not 492 -- including the end points) will be deleted from the error listing. 493 494 function Same_Error (M1, M2 : Error_Msg_Id) return Boolean; 495 -- See if two messages have the same text. Returns true if the text of the 496 -- two messages is identical, or if one of them is the same as the other 497 -- with an appended "instance at xxx" tag. 498 499 procedure Set_Msg_Blank; 500 -- Sets a single blank in the message if the preceding character is a 501 -- non-blank character other than a left parenthesis or minus. Has no 502 -- effect if manual quote mode is turned on. 503 504 procedure Set_Msg_Blank_Conditional; 505 -- Sets a single blank in the message if the preceding character is a 506 -- non-blank character other than a left parenthesis or quote. Has no 507 -- effect if manual quote mode is turned on. 508 509 procedure Set_Msg_Char (C : Character); 510 -- Add a single character to the current message. This routine does not 511 -- check for special insertion characters (they are just treated as text 512 -- characters if they occur). 513 514 procedure Set_Msg_Insertion_File_Name; 515 -- Handle file name insertion (left brace insertion character) 516 517 procedure Set_Msg_Insertion_Line_Number (Loc, Flag : Source_Ptr); 518 -- Handle line number insertion (# insertion character). Loc is the 519 -- location to be referenced, and Flag is the location at which the 520 -- flag is posted (used to determine whether to add "in file xxx") 521 522 procedure Set_Msg_Insertion_Name_Literal; 523 524 procedure Set_Msg_Insertion_Name; 525 -- Handle name insertion (% insertion character) 526 527 procedure Set_Msg_Insertion_Reserved_Name; 528 -- Handle insertion of reserved word name (* insertion character) 529 530 procedure Set_Msg_Insertion_Reserved_Word 531 (Text : String; 532 J : in out Integer); 533 -- Handle reserved word insertion (upper case letters). The Text argument 534 -- is the current error message input text, and J is an index which on 535 -- entry points to the first character of the reserved word, and on exit 536 -- points past the last character of the reserved word. Note that RM and 537 -- SPARK are treated specially and not considered to be keywords. 538 539 procedure Set_Msg_Insertion_Run_Time_Name; 540 -- If package System contains a definition for Run_Time_Name (see package 541 -- Targparm for details), then this procedure will insert a message of 542 -- the form (name) into the current error message, with name set in mixed 543 -- case (upper case after any spaces). If no run time name is defined, 544 -- then this routine has no effect). 545 546 procedure Set_Msg_Insertion_Uint; 547 -- Handle Uint insertion (^ insertion character) 548 549 procedure Set_Msg_Int (Line : Int); 550 -- Set the decimal representation of the argument in the error message 551 -- buffer with no leading zeroes output. 552 553 procedure Set_Msg_Name_Buffer; 554 -- Output name from Name_Buffer, with surrounding quotes unless manual 555 -- quotation mode is in effect. 556 557 procedure Set_Msg_Quote; 558 -- Set quote if in normal quote mode, nothing if in manual quote mode 559 560 procedure Set_Msg_Str (Text : String); 561 -- Add a sequence of characters to the current message. This routine does 562 -- not check for special insertion characters (they are just treated as 563 -- text characters if they occur). It does perform the transformation of 564 -- the special strings _xxx (xxx = Pre/Post/Type_Invariant) to xxx'Class. 565 566 procedure Set_Next_Non_Deleted_Msg (E : in out Error_Msg_Id); 567 -- Given a message id, move to next message id, but skip any deleted 568 -- messages, so that this results in E on output being the first non- 569 -- deleted message following the input value of E, or No_Error_Msg if 570 -- the input value of E was either already No_Error_Msg, or was the 571 -- last non-deleted message. 572 573 procedure Set_Specific_Warning_Off 574 (Loc : Source_Ptr; 575 Msg : String; 576 Reason : String_Id; 577 Config : Boolean; 578 Used : Boolean := False); 579 -- This is called in response to the two argument form of pragma Warnings 580 -- where the first argument is OFF, and the second argument is a string 581 -- which identifies a specific warning to be suppressed. The first argument 582 -- is the start of the suppression range, and the second argument is the 583 -- string from the pragma. Loc is the location of the pragma (which is the 584 -- start of the range to suppress). Reason is the reason string from the 585 -- pragma, or the null string if no reason is given. Config is True for the 586 -- configuration pragma case (where there is no requirement for a matching 587 -- OFF pragma). Used is set True to disable the check that the warning 588 -- actually has the effect of suppressing a warning. 589 590 procedure Set_Specific_Warning_On 591 (Loc : Source_Ptr; 592 Msg : String; 593 Err : out Boolean); 594 -- This is called in response to the two argument form of pragma Warnings 595 -- where the first argument is ON, and the second argument is a string 596 -- which identifies a specific warning to be suppressed. The first argument 597 -- is the end of the suppression range, and the second argument is the 598 -- string from the pragma. Err is set to True on return to report the error 599 -- of no matching Warnings Off pragma preceding this one. 600 601 procedure Set_Warnings_Mode_Off (Loc : Source_Ptr; Reason : String_Id); 602 -- Called in response to a pragma Warnings (Off) to record the source 603 -- location from which warnings are to be turned off. Reason is the 604 -- Reason from the pragma, or the null string if none is given. 605 606 procedure Set_Warnings_Mode_On (Loc : Source_Ptr); 607 -- Called in response to a pragma Warnings (On) to record the source 608 -- location from which warnings are to be turned back on. 609 610 function Warnings_Suppressed (Loc : Source_Ptr) return String_Id; 611 -- Determines if given location is covered by a warnings off suppression 612 -- range in the warnings table (or is suppressed by compilation option, 613 -- which generates a warning range for the whole source file). This routine 614 -- only deals with the general ON/OFF case, not specific warnings. The 615 -- returned result is No_String if warnings are not suppressed. If warnings 616 -- are suppressed for the given location, then corresponding Reason 617 -- parameter from the pragma is returned (or the null string if no Reason 618 -- parameter was present). 619 620 function Warning_Specifically_Suppressed 621 (Loc : Source_Ptr; 622 Msg : String_Ptr; 623 Tag : String := "") return String_Id; 624 -- Determines if given message to be posted at given location is suppressed 625 -- by specific ON/OFF Warnings pragmas specifying this particular message. 626 -- If the warning is not suppressed then No_String is returned, otherwise 627 -- the corresponding warning string is returned (or the null string if no 628 -- Warning argument was present in the pragma). Tag is the error message 629 -- tag for the message in question or the null string if there is no tag. 630 -- 631 -- Note: we have a null default for Tag to deal with calls from an old 632 -- branch of gnat2why, which does not know about tags in the calls but 633 -- which uses the latest version of erroutc. 634 635 function Warning_Treated_As_Error (Msg : String) return Boolean; 636 -- Returns True if the warning message Msg matches any of the strings 637 -- given by Warning_As_Error pragmas, as stored in the Warnings_As_Errors 638 -- table. 639 640 type Error_Msg_Proc is 641 access procedure (Msg : String; Flag_Location : Source_Ptr); 642 procedure Validate_Specific_Warnings (Eproc : Error_Msg_Proc); 643 -- Checks that specific warnings are consistent (for non-configuration 644 -- case, properly closed, and used). The argument is a pointer to the 645 -- Error_Msg procedure to be called if any inconsistencies are detected. 646 647end Erroutc; 648