1------------------------------------------------------------------------------ 2-- -- 3-- GNAT COMPILER COMPONENTS -- 4-- -- 5-- E R R O U T -- 6-- -- 7-- S p e c -- 8-- -- 9-- Copyright (C) 1992-2003 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 2, 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 COPYING. If not, write -- 19-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- 20-- MA 02111-1307, USA. -- 21-- -- 22-- GNAT was originally developed by the GNAT team at New York University. -- 23-- Extensive contributions were provided by Ada Core Technologies Inc. -- 24-- -- 25------------------------------------------------------------------------------ 26 27-- This package contains the routines to output error messages. They 28-- are basically system independent, however in some environments, e.g. 29-- when the parser is embedded into an editor, it may be appropriate 30-- to replace the implementation of this package. 31 32with Err_Vars; 33with Erroutc; 34with Table; 35with Types; use Types; 36with Uintp; use Uintp; 37 38with System; 39 40package Errout is 41 42 Serious_Errors_Detected : Nat renames Err_Vars.Serious_Errors_Detected; 43 -- This is a count of errors that are serious enough to stop expansion, 44 -- and hence to prevent generation of an object file even if the 45 -- switch -gnatQ is set. 46 47 Total_Errors_Detected : Nat renames Err_Vars.Total_Errors_Detected; 48 -- Number of errors detected so far. Includes count of serious errors 49 -- and non-serious errors, so this value is always greater than or 50 -- equal to the Serious_Errors_Detected value. 51 52 Warnings_Detected : Nat renames Err_Vars.Warnings_Detected; 53 -- Number of warnings detected 54 55 Configurable_Run_Time_Violations : Nat := 0; 56 -- Count of configurable run time violations so far. This is used to 57 -- suppress certain cascaded error messages when we know that we may not 58 -- have fully expanded some items, due to high integrity violations (i.e. 59 -- the use of constructs not permitted by the library in use, or 60 -- improper constructs in No_Run_Time mode). 61 62 type Compiler_State_Type is (Parsing, Analyzing); 63 Compiler_State : Compiler_State_Type; 64 -- Indicates current state of compilation. This is put in the Errout 65 -- spec because it affects the action of the error message handling. 66 -- In particular, an attempt is made by Errout to suppress cascaded 67 -- error messages in Parsing mode, but not in the other modes. 68 69 Current_Error_Source_File : Source_File_Index 70 renames Err_Vars.Current_Error_Source_File; 71 -- Id of current messages. Used to post file name when unit changes. This 72 -- is initialized to Main_Source_File at the start of a compilation, which 73 -- means that no file names will be output unless there are errors in units 74 -- other than the main unit. However, if the main unit has a pragma 75 -- Source_Reference line, then this is initialized to No_Source_File, 76 -- to force an initial reference to the real source file name. 77 78 Raise_Exception_On_Error : Nat renames Err_Vars.Raise_Exception_On_Error; 79 -- If this value is non-zero, then any attempt to generate an error 80 -- message raises the exception Error_Msg_Exception, and the error 81 -- message is not output. This is used for defending against junk 82 -- resulting from illegalities, and also for substitution of more 83 -- appropriate error messages from higher semantic levels. It is 84 -- a counter so that the increment/decrement protocol nests neatly. 85 86 Error_Msg_Exception : exception renames Err_Vars.Error_Msg_Exception; 87 -- Exception raised if Raise_Exception_On_Error is true 88 89 ----------------------------------- 90 -- Suppression of Error Messages -- 91 ----------------------------------- 92 93 -- In an effort to reduce the impact of redundant error messages, the 94 -- error output routines in this package normally suppress certain 95 -- classes of messages as follows: 96 97 -- 1. Identical messages placed at the same point in the text. Such 98 -- duplicate error message result for example from rescanning 99 -- sections of the text that contain lexical errors. Only one of 100 -- such a set of duplicate messages is output, and the rest are 101 -- suppressed. 102 103 -- 2. If more than one parser message is generated for a single source 104 -- line, then only the first message is output, the remaining 105 -- messages on the same line are suppressed. 106 107 -- 3. If a message is posted on a node for which a message has been 108 -- previously posted, then only the first message is retained. The 109 -- Error_Posted flag is used to detect such multiple postings. Note 110 -- that this only applies to semantic messages, since otherwise 111 -- for parser messages, this would be a special case of case 2. 112 113 -- 4. If a message is posted on a node whose Etype or Entity 114 -- fields reference entities on which an error message has 115 -- already been placed, as indicated by the Error_Posted flag 116 -- being set on these entities, then the message is suppressed. 117 118 -- 5. If a message attempts to insert an Error node, or a direct 119 -- reference to the Any_Type node, then the message is suppressed. 120 121 -- This normal suppression action may be overridden in cases 2-5 (but not 122 -- in case 1) by setting All_Errors mode, or by setting the special 123 -- unconditional message insertion character (!) at the end of the message 124 -- text as described below. 125 126 --------------------------------------------------------- 127 -- Error Message Text and Message Insertion Characters -- 128 --------------------------------------------------------- 129 130 -- Error message text strings are composed of lower case letters, digits 131 -- and the special characters space, comma, period, colon and semicolon, 132 -- apostrophe and parentheses. Special insertion characters can also 133 -- appear which cause the error message circuit to modify the given 134 -- string as follows: 135 136 -- Insertion character % (Percent: insert name from Names table) 137 -- The character % is replaced by the text for the name specified by 138 -- the Name_Id value stored in Error_Msg_Name_1. A blank precedes 139 -- the name if it is preceded by a non-blank character other than a 140 -- left parenthesis. The name is enclosed in quotes unless manual 141 -- quotation mode is set. If the Name_Id is set to No_Name, then 142 -- no insertion occurs; if the Name_Id is set to Error_Name, then 143 -- the string <error> is inserted. A second and third % may appear 144 -- in a single message, similarly replaced by the names which are 145 -- specified by the Name_Id values stored in Error_Msg_Name_2 and 146 -- Error_Msg_Name_3. The names are decoded and cased according to 147 -- the current identifier casing mode. 148 149 -- Insertion character $ (Dollar: insert unit name from Names table) 150 -- The character $ is treated similarly to %, except that the name 151 -- is obtained from the Unit_Name_Type value in Error_Msg_Unit_1 152 -- and Error_Msg_Unit_2, as provided by Get_Unit_Name_String in 153 -- package Uname. Note that this name includes the postfix (spec) 154 -- or (body) strings. If this postfix is not required, use the 155 -- normal % insertion for the unit name. 156 157 -- Insertion character { (Left brace: insert literally from names table) 158 -- The character { is treated similarly to %, except that the 159 -- name is output literally as stored in the names table without 160 -- adjusting the casing. This can be used for file names and in 161 -- other situations where the name string is to be output unchanged. 162 163 -- Insertion character * (Asterisk, insert reserved word name) 164 -- The insertion character * is treated exactly like % except that 165 -- the resulting name is cased according to the default conventions 166 -- for reserved words (see package Scans). 167 168 -- Insertion character & (Ampersand: insert name from node) 169 -- The insertion character & is treated similarly to %, except that 170 -- the name is taken from the Chars field of the given node, and may 171 -- refer to a child unit name, or a selected component. The casing 172 -- is, if possible, taken from the original source reference, which 173 -- is obtained from the Sloc field of the given node or nodes. If no 174 -- Sloc is available (happens e.g. for nodes in package Standard), 175 -- then the default case (see Scans spec) is used. The nodes to be 176 -- used are stored in Error_Msg_Node_1, Error_Msg_Node_2. No insertion 177 -- occurs for the Empty node, and the Error node results in the 178 -- insertion of the characters <error>. In addition, if the special 179 -- global variable Error_Msg_Qual_Level is non-zero, then the 180 -- reference will include up to the given number of levels of 181 -- qualification, using the scope chain. 182 183 -- Insertion character # (Pound: insert line number reference) 184 -- The character # is replaced by the string indicating the source 185 -- position stored in Error_Msg_Sloc. There are three cases: 186 -- 187 -- for package Standard: in package Standard 188 -- for locations in current file: at line nnn:ccc 189 -- for locations in other files: at filename:nnn:ccc 190 -- 191 -- By convention, the # insertion character is only used at the end 192 -- of an error message, so the above strings only appear as the last 193 -- characters of an error message. 194 195 -- Insertion character } (Right brace: insert type reference) 196 -- The character } is replaced by a string describing the type 197 -- referenced by the entity whose Id is stored in Error_Msg_Node_1. 198 -- the string gives the name or description of the type, and also 199 -- where appropriate the location of its declaration. Special 200 -- cases like "some integer type" are handled appropriately. Only 201 -- one } is allowed in a message, since there is not enough room 202 -- for two (the insertion can be quite long, including a file name) 203 -- In addition, if the special global variable Error_Msg_Qual_Level 204 -- is non-zero, then the reference will include up to the given 205 -- number of levels of qualification, using the scope chain. 206 207 -- Insertion character @ (At: insert column number reference) 208 -- The character @ is replaced by null if the RM_Column_Check mode is 209 -- off (False). If the switch is on (True), then @ is replaced by the 210 -- text string " in column nnn" where nnn is the decimal representation 211 -- of the column number stored in Error_Msg_Col plus one (the plus one 212 -- is because the number is stored 0-origin and displayed 1-origin). 213 214 -- Insertion character ^ (Carret: insert integer value) 215 -- The character ^ is replaced by the decimal conversion of the Uint 216 -- value stored in Error_Msg_Uint_1, with a possible leading minus. 217 -- A second ^ may occur in the message, in which case it is replaced 218 -- by the decimal conversion of the Uint value in Error_Msg_Uint_2. 219 220 -- Insertion character > (Right bracket, run time name) 221 -- The character > is replaced by a string of the form (name) if 222 -- Targparm scanned out a Run_Time_Name (see package Targparm for 223 -- details). The name is enclosed in parentheses and output in mixed 224 -- case mode (upper case after any space in the name). If no run time 225 -- name is defined, this insertion character has no effect. 226 227 -- Insertion character ! (Exclamation: unconditional message) 228 -- The character ! appearing as the last character of a message makes 229 -- the message unconditional which means that it is output even if it 230 -- would normally be suppressed. See section above for a description 231 -- of the cases in which messages are normally suppressed. 232 233 -- Insertion character ? (Question: warning message) 234 -- The character ? appearing anywhere in a message makes the message 235 -- a warning instead of a normal error message, and the text of the 236 -- message will be preceded by "Warning:" instead of "Error:" The 237 -- handling of warnings if further controlled by the Warning_Mode 238 -- option (-w switch), see package Opt for further details, and 239 -- also by the current setting from pragma Warnings. This pragma 240 -- applies only to warnings issued from the semantic phase (not 241 -- the parser), but currently all relevant warnings are posted 242 -- by the semantic phase anyway. Messages starting with (style) 243 -- are also treated as warning messages. 244 245 -- Insertion character A-Z (Upper case letter: Ada reserved word) 246 -- If two or more upper case letters appear in the message, they are 247 -- taken as an Ada reserved word, and are converted to the default 248 -- case for reserved words (see Scans package spec). Surrounding 249 -- quotes are added unless manual quotation mode is currently set. 250 251 -- Insertion character ` (Backquote: set manual quotation mode) 252 -- The backquote character always appears in pairs. Each backquote 253 -- of the pair is replaced by a double quote character. In addition, 254 -- Any reserved keywords, or name insertions between these backquotes 255 -- are not surrounded by the usual automatic double quotes. See the 256 -- section below on manual quotation mode for further details. 257 258 -- Insertion character ' (Quote: literal character) 259 -- Precedes a character which is placed literally into the message. 260 -- Used to insert characters into messages that are one of the 261 -- insertion characters defined here. Also useful in inserting 262 -- sequences of upper case letters (e.g. RM) which are not to be 263 -- treated as keywords. 264 265 -- Insertion character \ (Backslash: continuation message) 266 -- Indicates that the message is a continuation of a message 267 -- previously posted. This is used to ensure that such groups 268 -- of messages are treated as a unit. The \ character must be 269 -- the first character of the message text. 270 271 -- Insertion character | (vertical bar, non-serious error) 272 -- By default, error messages (other than warning messages) are 273 -- considered to be fatal error messages which prevent expansion 274 -- or generation of code in the presence of the -gnatQ switch. 275 -- If the insertion character | appears, the message is considered 276 -- to be non-serious, and does not cause Serious_Errors_Detected 277 -- to be incremented (so expansion is not prevented by such a msg). 278 279 ----------------------------------------------------- 280 -- Global Values Used for Error Message Insertions -- 281 ----------------------------------------------------- 282 283 -- The following global variables are essentially additional parameters 284 -- passed to the error message routine for insertion sequences described 285 -- above. The reason these are passed globally is that the insertion 286 -- mechanism is essentially an untyped one in which the appropriate 287 -- variables are set dependingon the specific insertion characters used. 288 289 Error_Msg_Col : Column_Number renames Err_Vars.Error_Msg_Col; 290 -- Column for @ insertion character in message 291 292 Error_Msg_Uint_1 : Uint renames Err_Vars.Error_Msg_Uint_1; 293 Error_Msg_Uint_2 : Uint renames Err_Vars.Error_Msg_Uint_2; 294 -- Uint values for ^ insertion characters in message 295 296 Error_Msg_Sloc : Source_Ptr renames Err_Vars.Error_Msg_Sloc; 297 -- Source location for # insertion character in message 298 299 Error_Msg_Name_1 : Name_Id renames Err_Vars.Error_Msg_Name_1; 300 Error_Msg_Name_2 : Name_Id renames Err_Vars.Error_Msg_Name_2; 301 Error_Msg_Name_3 : Name_Id renames Err_Vars.Error_Msg_Name_3; 302 -- Name_Id values for % insertion characters in message 303 304 Error_Msg_Unit_1 : Name_Id renames Err_Vars.Error_Msg_Unit_1; 305 Error_Msg_Unit_2 : Name_Id renames Err_Vars.Error_Msg_Unit_2; 306 -- Name_Id values for $ insertion characters in message 307 308 Error_Msg_Node_1 : Node_Id renames Err_Vars.Error_Msg_Node_1; 309 Error_Msg_Node_2 : Node_Id renames Err_Vars.Error_Msg_Node_2; 310 -- Node_Id values for & insertion characters in message 311 312 Error_Msg_Qual_Level : Int renames Err_Vars.Error_Msg_Qual_Level; 313 -- Number of levels of qualification required for type name (see the 314 -- description of the } insertion character. Note that this value does 315 -- note get reset by any Error_Msg call, so the caller is responsible 316 -- for resetting it. 317 318 ----------------------------------------------------- 319 -- Format of Messages and Manual Quotation Control -- 320 ----------------------------------------------------- 321 322 -- Messages are generally all in lower case, except for inserted names 323 -- and appear in one of the following three forms: 324 325 -- error: text 326 -- warning: text 327 328 -- The prefixes error and warning are supplied automatically (depending 329 -- on the use of the ? insertion character), and the call to the error 330 -- message routine supplies the text. The "error: " prefix is omitted 331 -- in brief error message formats. 332 333 -- Reserved Ada keywords in the message are in the default keyword case 334 -- (determined from the given source program), surrounded by quotation 335 -- marks. This is achieved by spelling the reserved word in upper case 336 -- letters, which is recognized as a request for insertion of quotation 337 -- marks by the error text processor. Thus for example: 338 339 -- Error_Msg_AP ("IS expected"); 340 341 -- would result in the output of one of the following: 342 343 -- error: "is" expected 344 -- error: "IS" expected 345 -- error: "Is" expected 346 347 -- the choice between these being made by looking at the casing convention 348 -- used for keywords (actually the first compilation unit keyword) in the 349 -- source file. 350 351 -- In the case of names, the default mode for the error text processor 352 -- is to surround the name by quotation marks automatically. The case 353 -- used for the identifier names is taken from the source program where 354 -- possible, and otherwise is the default casing convention taken from 355 -- the source file usage. 356 357 -- In some cases, better control over the placement of quote marks is 358 -- required. This is achieved using manual quotation mode. In this mode, 359 -- one or more insertion sequences is surrounded by backquote characters. 360 -- The backquote characters are output as double quote marks, and normal 361 -- automatic insertion of quotes is suppressed between the double quotes. 362 -- For example: 363 364 -- Error_Msg_AP ("`END &;` expected"); 365 366 -- generates a message like 367 368 -- error: "end Open_Scope;" expected 369 370 -- where the node specifying the name Open_Scope has been stored in 371 -- Error_Msg_Node_1 prior to the call. The great majority of error 372 -- messages operates in normal quotation mode. 373 374 -- Note: the normal automatic insertion of spaces before insertion 375 -- sequences (such as those that come from & and %) is suppressed in 376 -- manual quotation mode, so blanks, if needed as in the above example, 377 -- must be explicitly present. 378 379 ---------------------------- 380 -- Message ID Definitions -- 381 ---------------------------- 382 383 subtype Error_Msg_Id is Erroutc.Error_Msg_Id; 384 function "=" (Left, Right : Error_Msg_Id) return Boolean 385 renames Erroutc."="; 386 -- A type used to represent specific error messages. Used by the clients 387 -- of this package only in the context of the Get_Error_Id and 388 -- Change_Error_Text subprograms. 389 390 No_Error_Msg : constant Error_Msg_Id := Erroutc.No_Error_Msg; 391 -- A constant which is different from any value returned by Get_Error_Id. 392 -- Typically used by a client to indicate absense of a saved Id value. 393 394 function Get_Msg_Id return Error_Msg_Id renames Erroutc.Get_Msg_Id; 395 -- Returns the Id of the message most recently posted using one of the 396 -- Error_Msg routines. 397 398 function Get_Location (E : Error_Msg_Id) return Source_Ptr 399 renames Erroutc.Get_Location; 400 -- Returns the flag location of the error message with the given id E. 401 402 ------------------------ 403 -- List Pragmas Table -- 404 ------------------------ 405 406 -- When a pragma Page or pragma List is encountered by the parser, an 407 -- entry is made in the following table. This table is then used to 408 -- control the full listing if one is being generated. Note that the 409 -- reason we do the processing in the parser is so that we get proper 410 -- listing control even in syntax check only mode. 411 412 type List_Pragma_Type is (List_On, List_Off, Page); 413 414 type List_Pragma_Record is record 415 Ptyp : List_Pragma_Type; 416 Ploc : Source_Ptr; 417 end record; 418 419 -- Note: Ploc points to the terminating semicolon in the List_Off and 420 -- Page cases, and to the pragma keyword for List_On. In the case of 421 -- a pragma List_Off, a List_On entry is also made in the table, 422 -- pointing to the pragma keyword. This ensures that, as required, 423 -- a List (Off) pragma is listed even in list off mode. 424 425 package List_Pragmas is new Table.Table ( 426 Table_Component_Type => List_Pragma_Record, 427 Table_Index_Type => Int, 428 Table_Low_Bound => 1, 429 Table_Initial => 50, 430 Table_Increment => 200, 431 Table_Name => "List_Pragmas"); 432 433 --------------------------- 434 -- Ignore_Errors Feature -- 435 --------------------------- 436 437 -- In certain cases, notably for optional subunits, the compiler operates 438 -- in a mode where errors are to be ignored, and the whole unit is to be 439 -- considered as not present. To implement this we provide the following 440 -- flag to enable special handling, where error messages are suppressed, 441 -- but the Fatal_Error flag will still be set in the normal manner. 442 443 Ignore_Errors_Enable : Nat := 0; 444 -- Triggering switch. If non-zero, then ignore errors mode is activated. 445 -- This is a counter to allow convenient nesting of enable/disable. 446 447 ------------------------------ 448 -- Error Output Subprograms -- 449 ------------------------------ 450 451 procedure Initialize; 452 -- Initializes for output of error messages. Must be called for each 453 -- source file before using any of the other routines in the package. 454 455 procedure Finalize; 456 -- Finalize processing of error messages for one file and output message 457 -- indicating the number of detected errors. 458 459 procedure Error_Msg (Msg : String; Flag_Location : Source_Ptr); 460 -- Output a message at specified location. Can be called from the parser 461 -- or the semantic analyzer. 462 463 procedure Error_Msg_S (Msg : String); 464 -- Output a message at current scan pointer location. This routine can be 465 -- called only from the parser, since it references Scan_Ptr. 466 467 procedure Error_Msg_AP (Msg : String); 468 -- Output a message just after the previous token. This routine can be 469 -- called only from the parser, since it references Prev_Token_Ptr. 470 471 procedure Error_Msg_BC (Msg : String); 472 -- Output a message just before the current token. Note that the important 473 -- difference between this and the previous routine is that the BC case 474 -- posts a flag on the current line, whereas AP can post a flag at the 475 -- end of the preceding line. This routine can be called only from the 476 -- parser, since it references Token_Ptr. 477 478 procedure Error_Msg_SC (Msg : String); 479 -- Output a message at the start of the current token, unless we are at 480 -- the end of file, in which case we always output the message after the 481 -- last real token in the file. This routine can be called only from the 482 -- parser, since it references Token_Ptr. 483 484 procedure Error_Msg_SP (Msg : String); 485 -- Output a message at the start of the previous token. This routine can 486 -- be called only from the parser, since it references Prev_Token_Ptr. 487 488 procedure Error_Msg_N (Msg : String; N : Node_Or_Entity_Id); 489 -- Output a message at the Sloc of the given node. This routine can be 490 -- called from the parser or the semantic analyzer, although the call 491 -- from the latter is much more common (and is the most usual way of 492 -- generating error messages from the analyzer). The message text may 493 -- contain a single & insertion, which will reference the given node. 494 -- The message is suppressed if the node N already has a message posted, 495 -- or if it is a warning and warnings and N is an entity node for which 496 -- warnings are suppressed. 497 498 procedure Error_Msg_F (Msg : String; N : Node_Id); 499 -- Similar to Error_Msg_N except that the message is placed on the 500 -- first node of the construct N (First_Node (N)). 501 502 procedure Error_Msg_NE 503 (Msg : String; 504 N : Node_Or_Entity_Id; 505 E : Node_Or_Entity_Id); 506 -- Output a message at the Sloc of the given node N, with an insertion of 507 -- the name from the given entity node E. This is used by the semantic 508 -- routines, where this is a common error message situation. The Msg 509 -- text will contain a & or } as usual to mark the insertion point. 510 -- This routine can be called from the parser or the analyzer. 511 512 procedure Error_Msg_FE 513 (Msg : String; 514 N : Node_Id; 515 E : Node_Or_Entity_Id); 516 -- Same as Error_Msg_NE, except that the message is placed on the first 517 -- node of the construct N (First_Node (N)). 518 519 procedure Error_Msg_NEL 520 (Msg : String; 521 N : Node_Or_Entity_Id; 522 E : Node_Or_Entity_Id; 523 Flag_Location : Source_Ptr); 524 -- Exactly the same as Error_Msg_NE, except that the flag is placed at 525 -- the specified Flag_Location instead of at Sloc (N). 526 527 procedure Error_Msg_NW 528 (Eflag : Boolean; 529 Msg : String; 530 N : Node_Or_Entity_Id); 531 -- This routine is used for posting a message conditionally. The message 532 -- is posted (with the same effect as Error_Msg_N (Msg, N) if and only 533 -- if Eflag is True and if the node N is within the main extended source 534 -- unit. Typically this is a warning mode flag. 535 536 procedure Change_Error_Text (Error_Id : Error_Msg_Id; New_Msg : String); 537 -- The error message text of the message identified by Id is replaced by 538 -- the given text. This text may contain insertion characters in the 539 -- usual manner, and need not be the same length as the original text. 540 541 function First_Node (C : Node_Id) return Node_Id; 542 -- Given a construct C, finds the first node in the construct, i.e. the 543 -- one with the lowest Sloc value. This is useful in placing error msgs. 544 545 procedure Purge_Messages (From : Source_Ptr; To : Source_Ptr) 546 renames Erroutc.Purge_Messages; 547 -- All error messages whose location is in the range From .. To (not 548 -- including the end points) will be deleted from the error listing. 549 550 procedure Remove_Warning_Messages (N : Node_Id); 551 -- Remove any warning messages corresponding to the Sloc of N or any 552 -- of its descendent nodes. No effect if no such warnings. 553 554 procedure Remove_Warning_Messages (L : List_Id); 555 -- Remove warnings on all elements of a list. 556 557 procedure Set_Ignore_Errors (To : Boolean); 558 -- Following a call to this procedure with To=True, all error calls are 559 -- ignored. A call with To=False restores the default treatment in which 560 -- error calls are treated as usual (and as described in this spec). 561 562 procedure Set_Warnings_Mode_Off (Loc : Source_Ptr) 563 renames Erroutc.Set_Warnings_Mode_Off; 564 -- Called in response to a pragma Warnings (Off) to record the source 565 -- location from which warnings are to be turned off. 566 567 procedure Set_Warnings_Mode_On (Loc : Source_Ptr) 568 renames Erroutc.Set_Warnings_Mode_On; 569 -- Called in response to a pragma Warnings (On) to record the source 570 -- location from which warnings are to be turned back on. 571 572 function Compilation_Errors return Boolean 573 renames Erroutc.Compilation_Errors; 574 -- Returns true if errors have been detected, or warnings in -gnatwe 575 -- (treat warnings as errors) mode. 576 577 procedure Error_Msg_CRT (Feature : String; N : Node_Id); 578 -- Posts a non-fatal message on node N saying that the feature 579 -- identified by the Feature argument is not supported in either 580 -- configurable run-time mode or no run-time mode (as appropriate). 581 -- In the former case, the name of the library is output if available. 582 583 procedure dmsg (Id : Error_Msg_Id) renames Erroutc.dmsg; 584 -- Debugging routine to dump an error message 585 586 ------------------------------------ 587 -- Utility Interface for Back End -- 588 ------------------------------------ 589 590 -- The following subprograms can be used by the back end for the purposes 591 -- of concocting error messages that are not output via Errout, e.g. the 592 -- messages generated by the gcc back end. 593 594 procedure Set_Identifier_Casing 595 (Identifier_Name : System.Address; 596 File_Name : System.Address); 597 -- The identifier is a null terminated string that represents the name 598 -- of an identifier appearing in the source program. File_Name is a null 599 -- terminated string giving the corresponding file name for the identifier 600 -- as obtained from the front end by the use of Full_Debug_Name to the 601 -- source file referenced by the corresponding source location value. 602 -- On return, the name is in Name_Buffer, null terminated with Name_Len 603 -- set. This name is the identifier name as passed, cased according to 604 -- the default identifier casing for the given file. 605 606end Errout; 607