1------------------------------------------------------------------------------ 2-- -- 3-- GNAT COMPILER COMPONENTS -- 4-- -- 5-- E R R O U T -- 6-- -- 7-- B o d y -- 8-- -- 9-- Copyright (C) 1992-2015, 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-- Warning: Error messages can be generated during Gigi processing by direct 27-- calls to error message routines, so it is essential that the processing 28-- in this body be consistent with the requirements for the Gigi processing 29-- environment, and that in particular, no disallowed table expansion is 30-- allowed to occur. 31 32with Atree; use Atree; 33with Casing; use Casing; 34with Csets; use Csets; 35with Debug; use Debug; 36with Einfo; use Einfo; 37with Erroutc; use Erroutc; 38with Fname; use Fname; 39with Gnatvsn; use Gnatvsn; 40with Lib; use Lib; 41with Opt; use Opt; 42with Nlists; use Nlists; 43with Output; use Output; 44with Scans; use Scans; 45with Sem_Aux; use Sem_Aux; 46with Sinput; use Sinput; 47with Sinfo; use Sinfo; 48with Snames; use Snames; 49with Stand; use Stand; 50with Stylesw; use Stylesw; 51with Uname; use Uname; 52 53package body Errout is 54 55 Errors_Must_Be_Ignored : Boolean := False; 56 -- Set to True by procedure Set_Ignore_Errors (True), when calls to error 57 -- message procedures should be ignored (when parsing irrelevant text in 58 -- sources being preprocessed). 59 60 Finalize_Called : Boolean := False; 61 -- Set True if the Finalize routine has been called 62 63 Warn_On_Instance : Boolean; 64 -- Flag set true for warning message to be posted on instance 65 66 ------------------------------------ 67 -- Table of Non-Instance Messages -- 68 ------------------------------------ 69 70 -- This table contains an entry for every error message processed by the 71 -- Error_Msg routine that is not posted on generic (or inlined) instance. 72 -- As explained in further detail in the Error_Msg procedure body, this 73 -- table is used to avoid posting redundant messages on instances. 74 75 type NIM_Record is record 76 Msg : String_Ptr; 77 Loc : Source_Ptr; 78 end record; 79 -- Type used to store text and location of one message 80 81 package Non_Instance_Msgs is new Table.Table ( 82 Table_Component_Type => NIM_Record, 83 Table_Index_Type => Int, 84 Table_Low_Bound => 1, 85 Table_Initial => 100, 86 Table_Increment => 100, 87 Table_Name => "Non_Instance_Msgs"); 88 89 ----------------------- 90 -- Local Subprograms -- 91 ----------------------- 92 93 procedure Error_Msg_Internal 94 (Msg : String; 95 Sptr : Source_Ptr; 96 Optr : Source_Ptr; 97 Msg_Cont : Boolean); 98 -- This is the low level routine used to post messages after dealing with 99 -- the issue of messages placed on instantiations (which get broken up 100 -- into separate calls in Error_Msg). Sptr is the location on which the 101 -- flag will be placed in the output. In the case where the flag is on 102 -- the template, this points directly to the template, not to one of the 103 -- instantiation copies of the template. Optr is the original location 104 -- used to flag the error, and this may indeed point to an instantiation 105 -- copy. So typically we can see Optr pointing to the template location 106 -- in an instantiation copy when Sptr points to the source location of 107 -- the actual instantiation (i.e the line with the new). Msg_Cont is 108 -- set true if this is a continuation message. 109 110 function No_Warnings (N : Node_Or_Entity_Id) return Boolean; 111 -- Determines if warnings should be suppressed for the given node 112 113 function OK_Node (N : Node_Id) return Boolean; 114 -- Determines if a node is an OK node to place an error message on (return 115 -- True) or if the error message should be suppressed (return False). A 116 -- message is suppressed if the node already has an error posted on it, 117 -- or if it refers to an Etype that has an error posted on it, or if 118 -- it references an Entity that has an error posted on it. 119 120 procedure Output_Source_Line 121 (L : Physical_Line_Number; 122 Sfile : Source_File_Index; 123 Errs : Boolean); 124 -- Outputs text of source line L, in file S, together with preceding line 125 -- number, as described above for Output_Line_Number. The Errs parameter 126 -- indicates if there are errors attached to the line, which forces 127 -- listing on, even in the presence of pragma List (Off). 128 129 procedure Set_Msg_Insertion_Column; 130 -- Handle column number insertion (@ insertion character) 131 132 procedure Set_Msg_Insertion_Node; 133 -- Handle node (name from node) insertion (& insertion character) 134 135 procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr); 136 -- Handle type reference (right brace insertion character). Flag is the 137 -- location of the flag, which is provided for the internal call to 138 -- Set_Msg_Insertion_Line_Number, 139 140 procedure Set_Msg_Insertion_Unit_Name (Suffix : Boolean := True); 141 -- Handle unit name insertion ($ insertion character). Depending on Boolean 142 -- parameter Suffix, (spec) or (body) is appended after the unit name. 143 144 procedure Set_Msg_Node (Node : Node_Id); 145 -- Add the sequence of characters for the name associated with the given 146 -- node to the current message. For N_Designator, N_Selected_Component, 147 -- N_Defining_Program_Unit_Name, and N_Expanded_Name, the Prefix is 148 -- included as well. 149 150 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr); 151 -- Add a sequence of characters to the current message. The characters may 152 -- be one of the special insertion characters (see documentation in spec). 153 -- Flag is the location at which the error is to be posted, which is used 154 -- to determine whether or not the # insertion needs a file name. The 155 -- variables Msg_Buffer are set on return Msglen. 156 157 procedure Set_Posted (N : Node_Id); 158 -- Sets the Error_Posted flag on the given node, and all its parents that 159 -- are subexpressions and then on the parent non-subexpression construct 160 -- that contains the original expression. If that parent is a named 161 -- association, the flag is further propagated to its parent. This is done 162 -- in order to guard against cascaded errors. Note that this call has an 163 -- effect for a serious error only. 164 165 procedure Set_Qualification (N : Nat; E : Entity_Id); 166 -- Outputs up to N levels of qualification for the given entity. For 167 -- example, the entity A.B.C.D will output B.C. if N = 2. 168 169 function Special_Msg_Delete 170 (Msg : String; 171 N : Node_Or_Entity_Id; 172 E : Node_Or_Entity_Id) return Boolean; 173 -- This function is called from Error_Msg_NEL, passing the message Msg, 174 -- node N on which the error is to be posted, and the entity or node E 175 -- to be used for an & insertion in the message if any. The job of this 176 -- procedure is to test for certain cascaded messages that we would like 177 -- to suppress. If the message is to be suppressed then we return True. 178 -- If the message should be generated (the normal case) False is returned. 179 180 procedure Unwind_Internal_Type (Ent : in out Entity_Id); 181 -- This procedure is given an entity id for an internal type, i.e. a type 182 -- with an internal name. It unwinds the type to try to get to something 183 -- reasonably printable, generating prefixes like "subtype of", "access 184 -- to", etc along the way in the buffer. The value in Ent on return is the 185 -- final name to be printed. Hopefully this is not an internal name, but in 186 -- some internal name cases, it is an internal name, and has to be printed 187 -- anyway (although in this case the message has been killed if possible). 188 -- The global variable Class_Flag is set to True if the resulting entity 189 -- should have 'Class appended to its name (see Add_Class procedure), and 190 -- is otherwise unchanged. 191 192 function Warn_Insertion return String; 193 -- This is called for warning messages only (so Warning_Msg_Char is set) 194 -- and returns a corresponding string to use at the beginning of generated 195 -- auxiliary messages, such as "in instantiation at ...". 196 -- 'a' .. 'z' returns "?x?" 197 -- 'A' .. 'Z' returns "?X?" 198 -- '*' returns "?*?" 199 -- '$' returns "?$?info: " 200 -- ' ' returns " " 201 -- No other settings are valid 202 203 ----------------------- 204 -- Change_Error_Text -- 205 ----------------------- 206 207 procedure Change_Error_Text (Error_Id : Error_Msg_Id; New_Msg : String) is 208 Save_Next : Error_Msg_Id; 209 Err_Id : Error_Msg_Id := Error_Id; 210 211 begin 212 Set_Msg_Text (New_Msg, Errors.Table (Error_Id).Sptr); 213 Errors.Table (Error_Id).Text := new String'(Msg_Buffer (1 .. Msglen)); 214 215 -- If in immediate error message mode, output modified error message now 216 -- This is just a bit tricky, because we want to output just a single 217 -- message, and the messages we modified is already linked in. We solve 218 -- this by temporarily resetting its forward pointer to empty. 219 220 if Debug_Flag_OO then 221 Save_Next := Errors.Table (Error_Id).Next; 222 Errors.Table (Error_Id).Next := No_Error_Msg; 223 Write_Eol; 224 Output_Source_Line 225 (Errors.Table (Error_Id).Line, Errors.Table (Error_Id).Sfile, True); 226 Output_Error_Msgs (Err_Id); 227 Errors.Table (Error_Id).Next := Save_Next; 228 end if; 229 end Change_Error_Text; 230 231 ------------------------ 232 -- Compilation_Errors -- 233 ------------------------ 234 235 function Compilation_Errors return Boolean is 236 begin 237 if not Finalize_Called then 238 raise Program_Error; 239 else 240 return Erroutc.Compilation_Errors; 241 end if; 242 end Compilation_Errors; 243 244 -------------------------------------- 245 -- Delete_Warning_And_Continuations -- 246 -------------------------------------- 247 248 procedure Delete_Warning_And_Continuations (Msg : Error_Msg_Id) is 249 Id : Error_Msg_Id; 250 251 begin 252 pragma Assert (not Errors.Table (Msg).Msg_Cont); 253 254 Id := Msg; 255 loop 256 declare 257 M : Error_Msg_Object renames Errors.Table (Id); 258 259 begin 260 if not M.Deleted then 261 M.Deleted := True; 262 Warnings_Detected := Warnings_Detected - 1; 263 264 if M.Info then 265 Info_Messages := Info_Messages - 1; 266 end if; 267 268 if M.Warn_Err then 269 Warnings_Treated_As_Errors := Warnings_Treated_As_Errors - 1; 270 end if; 271 end if; 272 273 Id := M.Next; 274 exit when Id = No_Error_Msg; 275 exit when not Errors.Table (Id).Msg_Cont; 276 end; 277 end loop; 278 end Delete_Warning_And_Continuations; 279 280 --------------- 281 -- Error_Msg -- 282 --------------- 283 284 -- Error_Msg posts a flag at the given location, except that if the 285 -- Flag_Location points within a generic template and corresponds to an 286 -- instantiation of this generic template, then the actual message will be 287 -- posted on the generic instantiation, along with additional messages 288 -- referencing the generic declaration. 289 290 procedure Error_Msg (Msg : String; Flag_Location : Source_Ptr) is 291 Sindex : Source_File_Index; 292 -- Source index for flag location 293 294 Orig_Loc : Source_Ptr; 295 -- Original location of Flag_Location (i.e. location in original 296 -- template in instantiation case, otherwise unchanged). 297 298 begin 299 -- It is a fatal error to issue an error message when scanning from the 300 -- internal source buffer (see Sinput for further documentation) 301 302 pragma Assert (Sinput.Source /= Internal_Source_Ptr); 303 304 -- Return if all errors are to be ignored 305 306 if Errors_Must_Be_Ignored then 307 return; 308 end if; 309 310 -- If we already have messages, and we are trying to place a message at 311 -- No_Location, then just ignore the attempt since we assume that what 312 -- is happening is some cascaded junk. Note that this is safe in the 313 -- sense that proceeding will surely bomb. We will also bomb if the flag 314 -- location is No_Location and we don't have any messages so far, but 315 -- that is a real bug and a legitimate bomb, so we go ahead. 316 317 if Flag_Location = No_Location 318 and then Total_Errors_Detected > 0 319 then 320 return; 321 end if; 322 323 -- Start of processing for new message 324 325 Sindex := Get_Source_File_Index (Flag_Location); 326 Prescan_Message (Msg); 327 Orig_Loc := Original_Location (Flag_Location); 328 329 -- If the current location is in an instantiation, the issue arises of 330 -- whether to post the message on the template or the instantiation. 331 332 -- The way we decide is to see if we have posted the same message on 333 -- the template when we compiled the template (the template is always 334 -- compiled before any instantiations). For this purpose, we use a 335 -- separate table of messages. The reason we do this is twofold: 336 337 -- First, the messages can get changed by various processing 338 -- including the insertion of tokens etc, making it hard to 339 -- do the comparison. 340 341 -- Second, we will suppress a warning on a template if it is not in 342 -- the current extended source unit. That's reasonable and means we 343 -- don't want the warning on the instantiation here either, but it 344 -- does mean that the main error table would not in any case include 345 -- the message. 346 347 if Flag_Location = Orig_Loc then 348 Non_Instance_Msgs.Append ((new String'(Msg), Flag_Location)); 349 Warn_On_Instance := False; 350 351 -- Here we have an instance message 352 353 else 354 -- Delete if debug flag off, and this message duplicates a message 355 -- already posted on the corresponding template 356 357 if not Debug_Flag_GG then 358 for J in Non_Instance_Msgs.First .. Non_Instance_Msgs.Last loop 359 if Msg = Non_Instance_Msgs.Table (J).Msg.all 360 and then Non_Instance_Msgs.Table (J).Loc = Orig_Loc 361 then 362 return; 363 end if; 364 end loop; 365 end if; 366 367 -- No duplicate, so error/warning will be posted on instance 368 369 Warn_On_Instance := Is_Warning_Msg; 370 end if; 371 372 -- Ignore warning message that is suppressed for this location. Note 373 -- that style checks are not considered warning messages for this 374 -- purpose. 375 376 if Is_Warning_Msg and then Warnings_Suppressed (Orig_Loc) /= No_String 377 then 378 return; 379 380 -- For style messages, check too many messages so far 381 382 elsif Is_Style_Msg 383 and then Maximum_Messages /= 0 384 and then Warnings_Detected >= Maximum_Messages 385 then 386 return; 387 end if; 388 389 -- The idea at this stage is that we have two kinds of messages 390 391 -- First, we have those messages that are to be placed as requested at 392 -- Flag_Location. This includes messages that have nothing to do with 393 -- generics, and also messages placed on generic templates that reflect 394 -- an error in the template itself. For such messages we simply call 395 -- Error_Msg_Internal to place the message in the requested location. 396 397 if Instantiation (Sindex) = No_Location then 398 Error_Msg_Internal (Msg, Flag_Location, Flag_Location, False); 399 return; 400 end if; 401 402 -- If we are trying to flag an error in an instantiation, we may have 403 -- a generic contract violation. What we generate in this case is: 404 405 -- instantiation error at ... 406 -- original error message 407 408 -- or 409 410 -- warning: in instantiation at 411 -- warning: original warning message 412 413 -- All these messages are posted at the location of the top level 414 -- instantiation. If there are nested instantiations, then the 415 -- instantiation error message can be repeated, pointing to each 416 -- of the relevant instantiations. 417 418 -- Note: the instantiation mechanism is also shared for inlining of 419 -- subprogram bodies when front end inlining is done. In this case the 420 -- messages have the form: 421 422 -- in inlined body at ... 423 -- original error message 424 425 -- or 426 427 -- warning: in inlined body at 428 -- warning: original warning message 429 430 -- OK, here we have an instantiation error, and we need to generate the 431 -- error on the instantiation, rather than on the template. 432 433 declare 434 Actual_Error_Loc : Source_Ptr; 435 -- Location of outer level instantiation in instantiation case, or 436 -- just a copy of Flag_Location in the normal case. This is the 437 -- location where all error messages will actually be posted. 438 439 Save_Error_Msg_Sloc : constant Source_Ptr := Error_Msg_Sloc; 440 -- Save possible location set for caller's message. We need to use 441 -- Error_Msg_Sloc for the location of the instantiation error but we 442 -- have to preserve a possible original value. 443 444 X : Source_File_Index; 445 446 Msg_Cont_Status : Boolean; 447 -- Used to label continuation lines in instantiation case with 448 -- proper Msg_Cont status. 449 450 begin 451 -- Loop to find highest level instantiation, where all error 452 -- messages will be placed. 453 454 X := Sindex; 455 loop 456 Actual_Error_Loc := Instantiation (X); 457 X := Get_Source_File_Index (Actual_Error_Loc); 458 exit when Instantiation (X) = No_Location; 459 end loop; 460 461 -- Since we are generating the messages at the instantiation point in 462 -- any case, we do not want the references to the bad lines in the 463 -- instance to be annotated with the location of the instantiation. 464 465 Suppress_Instance_Location := True; 466 Msg_Cont_Status := False; 467 468 -- Loop to generate instantiation messages 469 470 Error_Msg_Sloc := Flag_Location; 471 X := Get_Source_File_Index (Flag_Location); 472 while Instantiation (X) /= No_Location loop 473 474 -- Suppress instantiation message on continuation lines 475 476 if Msg (Msg'First) /= '\' then 477 478 -- Case of inlined body 479 480 if Inlined_Body (X) then 481 if Is_Warning_Msg or Is_Style_Msg then 482 Error_Msg_Internal 483 (Warn_Insertion & "in inlined body #", 484 Actual_Error_Loc, Flag_Location, Msg_Cont_Status); 485 else 486 Error_Msg_Internal 487 ("error in inlined body #", 488 Actual_Error_Loc, Flag_Location, Msg_Cont_Status); 489 end if; 490 491 -- Case of generic instantiation 492 493 else 494 if Is_Warning_Msg or else Is_Style_Msg then 495 Error_Msg_Internal 496 (Warn_Insertion & "in instantiation #", 497 Actual_Error_Loc, Flag_Location, Msg_Cont_Status); 498 else 499 Error_Msg_Internal 500 ("instantiation error #", 501 Actual_Error_Loc, Flag_Location, Msg_Cont_Status); 502 end if; 503 end if; 504 end if; 505 506 Error_Msg_Sloc := Instantiation (X); 507 X := Get_Source_File_Index (Error_Msg_Sloc); 508 Msg_Cont_Status := True; 509 end loop; 510 511 Suppress_Instance_Location := False; 512 Error_Msg_Sloc := Save_Error_Msg_Sloc; 513 514 -- Here we output the original message on the outer instantiation 515 516 Error_Msg_Internal 517 (Msg, Actual_Error_Loc, Flag_Location, Msg_Cont_Status); 518 end; 519 end Error_Msg; 520 521 -------------------------------- 522 -- Error_Msg_Ada_2012_Feature -- 523 -------------------------------- 524 525 procedure Error_Msg_Ada_2012_Feature (Feature : String; Loc : Source_Ptr) is 526 begin 527 if Ada_Version < Ada_2012 then 528 Error_Msg (Feature & " is an Ada 2012 feature", Loc); 529 530 if No (Ada_Version_Pragma) then 531 Error_Msg ("\unit must be compiled with -gnat2012 switch", Loc); 532 else 533 Error_Msg_Sloc := Sloc (Ada_Version_Pragma); 534 Error_Msg ("\incompatible with Ada version set#", Loc); 535 end if; 536 end if; 537 end Error_Msg_Ada_2012_Feature; 538 539 ------------------ 540 -- Error_Msg_AP -- 541 ------------------ 542 543 procedure Error_Msg_AP (Msg : String) is 544 S1 : Source_Ptr; 545 C : Character; 546 547 begin 548 -- If we had saved the Scan_Ptr value after scanning the previous 549 -- token, then we would have exactly the right place for putting 550 -- the flag immediately at hand. However, that would add at least 551 -- two instructions to a Scan call *just* to service the possibility 552 -- of an Error_Msg_AP call. So instead we reconstruct that value. 553 554 -- We have two possibilities, start with Prev_Token_Ptr and skip over 555 -- the current token, which is made harder by the possibility that this 556 -- token may be in error, or start with Token_Ptr and work backwards. 557 -- We used to take the second approach, but it's hard because of 558 -- comments, and harder still because things that look like comments 559 -- can appear inside strings. So now we take the first approach. 560 561 -- Note: in the case where there is no previous token, Prev_Token_Ptr 562 -- is set to Source_First, which is a reasonable position for the 563 -- error flag in this situation. 564 565 S1 := Prev_Token_Ptr; 566 C := Source (S1); 567 568 -- If the previous token is a string literal, we need a special approach 569 -- since there may be white space inside the literal and we don't want 570 -- to stop on that white space. 571 572 -- Note: since this is an error recovery issue anyway, it is not worth 573 -- worrying about special UTF_32 line terminator characters here. 574 575 if Prev_Token = Tok_String_Literal then 576 loop 577 S1 := S1 + 1; 578 579 if Source (S1) = C then 580 S1 := S1 + 1; 581 exit when Source (S1) /= C; 582 elsif Source (S1) in Line_Terminator then 583 exit; 584 end if; 585 end loop; 586 587 -- Character literal also needs special handling 588 589 elsif Prev_Token = Tok_Char_Literal then 590 S1 := S1 + 3; 591 592 -- Otherwise we search forward for the end of the current token, marked 593 -- by a line terminator, white space, a comment symbol or if we bump 594 -- into the following token (i.e. the current token). 595 596 -- Again, it is not worth worrying about UTF_32 special line terminator 597 -- characters in this context, since this is only for error recovery. 598 599 else 600 while Source (S1) not in Line_Terminator 601 and then Source (S1) /= ' ' 602 and then Source (S1) /= ASCII.HT 603 and then (Source (S1) /= '-' or else Source (S1 + 1) /= '-') 604 and then S1 /= Token_Ptr 605 loop 606 S1 := S1 + 1; 607 end loop; 608 end if; 609 610 -- S1 is now set to the location for the flag 611 612 Error_Msg (Msg, S1); 613 end Error_Msg_AP; 614 615 ------------------ 616 -- Error_Msg_BC -- 617 ------------------ 618 619 procedure Error_Msg_BC (Msg : String) is 620 begin 621 -- If we are at end of file, post the flag after the previous token 622 623 if Token = Tok_EOF then 624 Error_Msg_AP (Msg); 625 626 -- If we are at start of file, post the flag at the current token 627 628 elsif Token_Ptr = Source_First (Current_Source_File) then 629 Error_Msg_SC (Msg); 630 631 -- If the character before the current token is a space or a horizontal 632 -- tab, then we place the flag on this character (in the case of a tab 633 -- we would really like to place it in the "last" character of the tab 634 -- space, but that it too much trouble to worry about). 635 636 elsif Source (Token_Ptr - 1) = ' ' 637 or else Source (Token_Ptr - 1) = ASCII.HT 638 then 639 Error_Msg (Msg, Token_Ptr - 1); 640 641 -- If there is no space or tab before the current token, then there is 642 -- no room to place the flag before the token, so we place it on the 643 -- token instead (this happens for example at the start of a line). 644 645 else 646 Error_Msg (Msg, Token_Ptr); 647 end if; 648 end Error_Msg_BC; 649 650 ------------------- 651 -- Error_Msg_CRT -- 652 ------------------- 653 654 procedure Error_Msg_CRT (Feature : String; N : Node_Id) is 655 CNRT : constant String := " not allowed in no run time mode"; 656 CCRT : constant String := " not supported by configuration>"; 657 658 S : String (1 .. Feature'Length + 1 + CCRT'Length); 659 L : Natural; 660 661 begin 662 S (1) := '|'; 663 S (2 .. Feature'Length + 1) := Feature; 664 L := Feature'Length + 2; 665 666 if No_Run_Time_Mode then 667 S (L .. L + CNRT'Length - 1) := CNRT; 668 L := L + CNRT'Length - 1; 669 670 else pragma Assert (Configurable_Run_Time_Mode); 671 S (L .. L + CCRT'Length - 1) := CCRT; 672 L := L + CCRT'Length - 1; 673 end if; 674 675 Error_Msg_N (S (1 .. L), N); 676 Configurable_Run_Time_Violations := Configurable_Run_Time_Violations + 1; 677 end Error_Msg_CRT; 678 679 ------------------ 680 -- Error_Msg_PT -- 681 ------------------ 682 683 procedure Error_Msg_PT (E : Entity_Id; Iface_Prim : Entity_Id) is 684 begin 685 Error_Msg_N 686 ("illegal overriding of subprogram inherited from interface", E); 687 688 Error_Msg_Sloc := Sloc (Iface_Prim); 689 690 if Ekind (E) = E_Function then 691 Error_Msg_N 692 ("\first formal of & declared # must be of mode `IN` " 693 & "or access-to-constant", E); 694 else 695 Error_Msg_N 696 ("\first formal of & declared # must be of mode `OUT`, `IN OUT` " 697 & "or access-to-variable", E); 698 end if; 699 end Error_Msg_PT; 700 701 ----------------- 702 -- Error_Msg_F -- 703 ----------------- 704 705 procedure Error_Msg_F (Msg : String; N : Node_Id) is 706 begin 707 Error_Msg_NEL (Msg, N, N, Sloc (First_Node (N))); 708 end Error_Msg_F; 709 710 ------------------ 711 -- Error_Msg_FE -- 712 ------------------ 713 714 procedure Error_Msg_FE 715 (Msg : String; 716 N : Node_Id; 717 E : Node_Or_Entity_Id) 718 is 719 begin 720 Error_Msg_NEL (Msg, N, E, Sloc (First_Node (N))); 721 end Error_Msg_FE; 722 723 ------------------------ 724 -- Error_Msg_Internal -- 725 ------------------------ 726 727 procedure Error_Msg_Internal 728 (Msg : String; 729 Sptr : Source_Ptr; 730 Optr : Source_Ptr; 731 Msg_Cont : Boolean) 732 is 733 Next_Msg : Error_Msg_Id; 734 -- Pointer to next message at insertion point 735 736 Prev_Msg : Error_Msg_Id; 737 -- Pointer to previous message at insertion point 738 739 Temp_Msg : Error_Msg_Id; 740 741 Warn_Err : Boolean; 742 -- Set if warning to be treated as error 743 744 procedure Handle_Serious_Error; 745 -- Internal procedure to do all error message handling for a serious 746 -- error message, other than bumping the error counts and arranging 747 -- for the message to be output. 748 749 -------------------------- 750 -- Handle_Serious_Error -- 751 -------------------------- 752 753 procedure Handle_Serious_Error is 754 begin 755 -- Turn off code generation if not done already 756 757 if Operating_Mode = Generate_Code then 758 Operating_Mode := Check_Semantics; 759 Expander_Active := False; 760 end if; 761 762 -- Set the fatal error flag in the unit table unless we are in 763 -- Try_Semantics mode (in which case we set ignored mode if not 764 -- currently set. This stops the semantics from being performed 765 -- if we find a serious error. This is skipped if we are currently 766 -- dealing with the configuration pragma file. 767 768 if Current_Source_Unit /= No_Unit then 769 declare 770 U : constant Unit_Number_Type := Get_Source_Unit (Sptr); 771 begin 772 if Try_Semantics then 773 if Fatal_Error (U) = None then 774 Set_Fatal_Error (U, Error_Ignored); 775 end if; 776 else 777 Set_Fatal_Error (U, Error_Detected); 778 end if; 779 end; 780 end if; 781 end Handle_Serious_Error; 782 783 -- Start of processing for Error_Msg_Internal 784 785 begin 786 if Raise_Exception_On_Error /= 0 then 787 raise Error_Msg_Exception; 788 end if; 789 790 Continuation := Msg_Cont; 791 Continuation_New_Line := False; 792 Suppress_Message := False; 793 Kill_Message := False; 794 Set_Msg_Text (Msg, Sptr); 795 796 -- Kill continuation if parent message killed 797 798 if Continuation and Last_Killed then 799 return; 800 end if; 801 802 -- Return without doing anything if message is suppressed 803 804 if Suppress_Message 805 and then not All_Errors_Mode 806 and then not Is_Warning_Msg 807 and then not Is_Unconditional_Msg 808 then 809 if not Continuation then 810 Last_Killed := True; 811 end if; 812 813 return; 814 end if; 815 816 -- Return without doing anything if message is killed and this is not 817 -- the first error message. The philosophy is that if we get a weird 818 -- error message and we already have had a message, then we hope the 819 -- weird message is a junk cascaded message 820 821 if Kill_Message 822 and then not All_Errors_Mode 823 and then Total_Errors_Detected /= 0 824 then 825 if not Continuation then 826 Last_Killed := True; 827 end if; 828 829 return; 830 end if; 831 832 -- Special check for warning message to see if it should be output 833 834 if Is_Warning_Msg then 835 836 -- Immediate return if warning message and warnings are suppressed 837 838 if Warnings_Suppressed (Optr) /= No_String 839 or else 840 Warnings_Suppressed (Sptr) /= No_String 841 then 842 Cur_Msg := No_Error_Msg; 843 return; 844 end if; 845 846 -- If the flag location is in the main extended source unit then for 847 -- sure we want the warning since it definitely belongs 848 849 if In_Extended_Main_Source_Unit (Sptr) then 850 null; 851 852 -- If the main unit has not been read yet. the warning must be on 853 -- a configuration file: gnat.adc or user-defined. This means we 854 -- are not parsing the main unit yet, so skip following checks. 855 856 elsif No (Cunit (Main_Unit)) then 857 null; 858 859 -- If the flag location is not in the main extended source unit, then 860 -- we want to eliminate the warning, unless it is in the extended 861 -- main code unit and we want warnings on the instance. 862 863 elsif In_Extended_Main_Code_Unit (Sptr) and then Warn_On_Instance then 864 null; 865 866 -- Keep warning if debug flag G set 867 868 elsif Debug_Flag_GG then 869 null; 870 871 -- Keep warning if message text contains !! 872 873 elsif Has_Double_Exclam then 874 null; 875 876 -- Here is where we delete a warning from a with'ed unit 877 878 else 879 Cur_Msg := No_Error_Msg; 880 881 if not Continuation then 882 Last_Killed := True; 883 end if; 884 885 return; 886 end if; 887 end if; 888 889 -- If message is to be ignored in special ignore message mode, this is 890 -- where we do this special processing, bypassing message output. 891 892 if Ignore_Errors_Enable > 0 then 893 if Is_Serious_Error then 894 Handle_Serious_Error; 895 end if; 896 897 return; 898 end if; 899 900 -- If error message line length set, and this is a continuation message 901 -- then all we do is to append the text to the text of the last message 902 -- with a comma space separator (eliminating a possible (style) or 903 -- info prefix). 904 905 if Error_Msg_Line_Length /= 0 and then Continuation then 906 Cur_Msg := Errors.Last; 907 908 declare 909 Oldm : String_Ptr := Errors.Table (Cur_Msg).Text; 910 Newm : String (1 .. Oldm'Last + 2 + Msglen); 911 Newl : Natural; 912 M : Natural; 913 914 begin 915 -- First copy old message to new one and free it 916 917 Newm (Oldm'Range) := Oldm.all; 918 Newl := Oldm'Length; 919 Free (Oldm); 920 921 -- Remove (style) or info: at start of message 922 923 if Msglen > 8 and then Msg_Buffer (1 .. 8) = "(style) " then 924 M := 9; 925 926 elsif Msglen > 6 and then Msg_Buffer (1 .. 6) = "info: " then 927 M := 7; 928 929 else 930 M := 1; 931 end if; 932 933 -- Now deal with separation between messages. Normally this is 934 -- simply comma space, but there are some special cases. 935 936 -- If continuation new line, then put actual NL character in msg 937 938 if Continuation_New_Line then 939 Newl := Newl + 1; 940 Newm (Newl) := ASCII.LF; 941 942 -- If continuation message is enclosed in parentheses, then 943 -- special treatment (don't need a comma, and we want to combine 944 -- successive parenthetical remarks into a single one with 945 -- separating commas). 946 947 elsif Msg_Buffer (M) = '(' and then Msg_Buffer (Msglen) = ')' then 948 949 -- Case where existing message ends in right paren, remove 950 -- and separate parenthetical remarks with a comma. 951 952 if Newm (Newl) = ')' then 953 Newm (Newl) := ','; 954 Msg_Buffer (M) := ' '; 955 956 -- Case where we are adding new parenthetical comment 957 958 else 959 Newl := Newl + 1; 960 Newm (Newl) := ' '; 961 end if; 962 963 -- Case where continuation not in parens and no new line 964 965 else 966 Newm (Newl + 1 .. Newl + 2) := ", "; 967 Newl := Newl + 2; 968 end if; 969 970 -- Append new message 971 972 Newm (Newl + 1 .. Newl + Msglen - M + 1) := 973 Msg_Buffer (M .. Msglen); 974 Newl := Newl + Msglen - M + 1; 975 Errors.Table (Cur_Msg).Text := new String'(Newm (1 .. Newl)); 976 977 -- Update warning msg flag and message doc char if needed 978 979 if Is_Warning_Msg then 980 if not Errors.Table (Cur_Msg).Warn then 981 Errors.Table (Cur_Msg).Warn := True; 982 Errors.Table (Cur_Msg).Warn_Chr := Warning_Msg_Char; 983 984 elsif Warning_Msg_Char /= ' ' then 985 Errors.Table (Cur_Msg).Warn_Chr := Warning_Msg_Char; 986 end if; 987 end if; 988 end; 989 990 return; 991 end if; 992 993 -- Here we build a new error object 994 995 Errors.Append 996 ((Text => new String'(Msg_Buffer (1 .. Msglen)), 997 Next => No_Error_Msg, 998 Prev => No_Error_Msg, 999 Sptr => Sptr, 1000 Optr => Optr, 1001 Sfile => Get_Source_File_Index (Sptr), 1002 Line => Get_Physical_Line_Number (Sptr), 1003 Col => Get_Column_Number (Sptr), 1004 Warn => Is_Warning_Msg, 1005 Info => Is_Info_Msg, 1006 Check => Is_Check_Msg, 1007 Warn_Err => False, -- reset below 1008 Warn_Chr => Warning_Msg_Char, 1009 Style => Is_Style_Msg, 1010 Serious => Is_Serious_Error, 1011 Uncond => Is_Unconditional_Msg, 1012 Msg_Cont => Continuation, 1013 Deleted => False)); 1014 Cur_Msg := Errors.Last; 1015 1016 -- Test if warning to be treated as error 1017 1018 Warn_Err := 1019 Is_Warning_Msg 1020 and then (Warning_Treated_As_Error (Msg_Buffer (1 .. Msglen)) 1021 or else 1022 Warning_Treated_As_Error (Get_Warning_Tag (Cur_Msg))); 1023 1024 -- Propagate Warn_Err to this message and preceding continuations 1025 1026 for J in reverse 1 .. Errors.Last loop 1027 Errors.Table (J).Warn_Err := Warn_Err; 1028 exit when not Errors.Table (J).Msg_Cont; 1029 end loop; 1030 1031 -- If immediate errors mode set, output error message now. Also output 1032 -- now if the -d1 debug flag is set (so node number message comes out 1033 -- just before actual error message) 1034 1035 if Debug_Flag_OO or else Debug_Flag_1 then 1036 Write_Eol; 1037 Output_Source_Line 1038 (Errors.Table (Cur_Msg).Line, Errors.Table (Cur_Msg).Sfile, True); 1039 Temp_Msg := Cur_Msg; 1040 Output_Error_Msgs (Temp_Msg); 1041 1042 -- If not in immediate errors mode, then we insert the message in the 1043 -- error chain for later output by Finalize. The messages are sorted 1044 -- first by unit (main unit comes first), and within a unit by source 1045 -- location (earlier flag location first in the chain). 1046 1047 else 1048 -- First a quick check, does this belong at the very end of the chain 1049 -- of error messages. This saves a lot of time in the normal case if 1050 -- there are lots of messages. 1051 1052 if Last_Error_Msg /= No_Error_Msg 1053 and then Errors.Table (Cur_Msg).Sfile = 1054 Errors.Table (Last_Error_Msg).Sfile 1055 and then (Sptr > Errors.Table (Last_Error_Msg).Sptr 1056 or else 1057 (Sptr = Errors.Table (Last_Error_Msg).Sptr 1058 and then 1059 Optr > Errors.Table (Last_Error_Msg).Optr)) 1060 then 1061 Prev_Msg := Last_Error_Msg; 1062 Next_Msg := No_Error_Msg; 1063 1064 -- Otherwise do a full sequential search for the insertion point 1065 1066 else 1067 Prev_Msg := No_Error_Msg; 1068 Next_Msg := First_Error_Msg; 1069 while Next_Msg /= No_Error_Msg loop 1070 exit when 1071 Errors.Table (Cur_Msg).Sfile < Errors.Table (Next_Msg).Sfile; 1072 1073 if Errors.Table (Cur_Msg).Sfile = Errors.Table (Next_Msg).Sfile 1074 then 1075 exit when Sptr < Errors.Table (Next_Msg).Sptr 1076 or else (Sptr = Errors.Table (Next_Msg).Sptr 1077 and then Optr < Errors.Table (Next_Msg).Optr); 1078 end if; 1079 1080 Prev_Msg := Next_Msg; 1081 Next_Msg := Errors.Table (Next_Msg).Next; 1082 end loop; 1083 end if; 1084 1085 -- Now we insert the new message in the error chain. The insertion 1086 -- point for the message is after Prev_Msg and before Next_Msg. 1087 1088 -- The possible insertion point for the new message is after Prev_Msg 1089 -- and before Next_Msg. However, this is where we do a special check 1090 -- for redundant parsing messages, defined as messages posted on the 1091 -- same line. The idea here is that probably such messages are junk 1092 -- from the parser recovering. In full errors mode, we don't do this 1093 -- deletion, but otherwise such messages are discarded at this stage. 1094 1095 if Prev_Msg /= No_Error_Msg 1096 and then Errors.Table (Prev_Msg).Line = 1097 Errors.Table (Cur_Msg).Line 1098 and then Errors.Table (Prev_Msg).Sfile = 1099 Errors.Table (Cur_Msg).Sfile 1100 and then Compiler_State = Parsing 1101 and then not All_Errors_Mode 1102 then 1103 -- Don't delete unconditional messages and at this stage, don't 1104 -- delete continuation lines (we attempted to delete those earlier 1105 -- if the parent message was deleted. 1106 1107 if not Errors.Table (Cur_Msg).Uncond 1108 and then not Continuation 1109 then 1110 -- Don't delete if prev msg is warning and new msg is an error. 1111 -- This is because we don't want a real error masked by a 1112 -- warning. In all other cases (that is parse errors for the 1113 -- same line that are not unconditional) we do delete the 1114 -- message. This helps to avoid junk extra messages from 1115 -- cascaded parsing errors 1116 1117 if not (Errors.Table (Prev_Msg).Warn 1118 or else 1119 Errors.Table (Prev_Msg).Style) 1120 or else 1121 (Errors.Table (Cur_Msg).Warn 1122 or else 1123 Errors.Table (Cur_Msg).Style) 1124 then 1125 -- All tests passed, delete the message by simply returning 1126 -- without any further processing. 1127 1128 if not Continuation then 1129 Last_Killed := True; 1130 end if; 1131 1132 return; 1133 end if; 1134 end if; 1135 end if; 1136 1137 -- Come here if message is to be inserted in the error chain 1138 1139 if not Continuation then 1140 Last_Killed := False; 1141 end if; 1142 1143 if Prev_Msg = No_Error_Msg then 1144 First_Error_Msg := Cur_Msg; 1145 else 1146 Errors.Table (Prev_Msg).Next := Cur_Msg; 1147 end if; 1148 1149 Errors.Table (Cur_Msg).Next := Next_Msg; 1150 1151 if Next_Msg = No_Error_Msg then 1152 Last_Error_Msg := Cur_Msg; 1153 end if; 1154 end if; 1155 1156 -- Bump appropriate statistics count 1157 1158 if Errors.Table (Cur_Msg).Warn or else Errors.Table (Cur_Msg).Style then 1159 Warnings_Detected := Warnings_Detected + 1; 1160 1161 if Errors.Table (Cur_Msg).Info then 1162 Info_Messages := Info_Messages + 1; 1163 end if; 1164 1165 elsif Errors.Table (Cur_Msg).Check then 1166 Check_Messages := Check_Messages + 1; 1167 1168 else 1169 Total_Errors_Detected := Total_Errors_Detected + 1; 1170 1171 if Errors.Table (Cur_Msg).Serious then 1172 Serious_Errors_Detected := Serious_Errors_Detected + 1; 1173 Handle_Serious_Error; 1174 1175 -- If not serious error, set Fatal_Error to indicate ignored error 1176 1177 else 1178 declare 1179 U : constant Unit_Number_Type := Get_Source_Unit (Sptr); 1180 begin 1181 if Fatal_Error (U) = None then 1182 Set_Fatal_Error (U, Error_Ignored); 1183 end if; 1184 end; 1185 end if; 1186 end if; 1187 1188 -- Record warning message issued 1189 1190 if Errors.Table (Cur_Msg).Warn 1191 and then not Errors.Table (Cur_Msg).Msg_Cont 1192 then 1193 Warning_Msg := Cur_Msg; 1194 end if; 1195 1196 -- If too many warnings turn off warnings 1197 1198 if Maximum_Messages /= 0 then 1199 if Warnings_Detected = Maximum_Messages then 1200 Warning_Mode := Suppress; 1201 end if; 1202 1203 -- If too many errors abandon compilation 1204 1205 if Total_Errors_Detected = Maximum_Messages then 1206 raise Unrecoverable_Error; 1207 end if; 1208 end if; 1209 end Error_Msg_Internal; 1210 1211 ----------------- 1212 -- Error_Msg_N -- 1213 ----------------- 1214 1215 procedure Error_Msg_N (Msg : String; N : Node_Or_Entity_Id) is 1216 begin 1217 Error_Msg_NEL (Msg, N, N, Sloc (N)); 1218 end Error_Msg_N; 1219 1220 ------------------ 1221 -- Error_Msg_NE -- 1222 ------------------ 1223 1224 procedure Error_Msg_NE 1225 (Msg : String; 1226 N : Node_Or_Entity_Id; 1227 E : Node_Or_Entity_Id) 1228 is 1229 begin 1230 Error_Msg_NEL (Msg, N, E, Sloc (N)); 1231 end Error_Msg_NE; 1232 1233 ------------------- 1234 -- Error_Msg_NEL -- 1235 ------------------- 1236 1237 procedure Error_Msg_NEL 1238 (Msg : String; 1239 N : Node_Or_Entity_Id; 1240 E : Node_Or_Entity_Id; 1241 Flag_Location : Source_Ptr) 1242 is 1243 begin 1244 if Special_Msg_Delete (Msg, N, E) then 1245 return; 1246 end if; 1247 1248 Prescan_Message (Msg); 1249 1250 -- Special handling for warning messages 1251 1252 if Is_Warning_Msg then 1253 1254 -- Suppress if no warnings set for either entity or node 1255 1256 if No_Warnings (N) or else No_Warnings (E) then 1257 1258 -- Disable any continuation messages as well 1259 1260 Last_Killed := True; 1261 return; 1262 end if; 1263 1264 -- Suppress if inside loop that is known to be null or is probably 1265 -- null (case where loop executes only if invalid values present). 1266 -- In either case warnings in the loop are likely to be junk. 1267 1268 declare 1269 P : Node_Id; 1270 1271 begin 1272 P := Parent (N); 1273 while Present (P) loop 1274 if Nkind (P) = N_Loop_Statement 1275 and then Suppress_Loop_Warnings (P) 1276 then 1277 return; 1278 end if; 1279 1280 P := Parent (P); 1281 end loop; 1282 end; 1283 end if; 1284 1285 -- Test for message to be output 1286 1287 if All_Errors_Mode 1288 or else Is_Unconditional_Msg 1289 or else Is_Warning_Msg 1290 or else OK_Node (N) 1291 or else (Msg (Msg'First) = '\' and then not Last_Killed) 1292 then 1293 Debug_Output (N); 1294 Error_Msg_Node_1 := E; 1295 Error_Msg (Msg, Flag_Location); 1296 1297 else 1298 Last_Killed := True; 1299 end if; 1300 1301 if not (Is_Warning_Msg or Is_Style_Msg) then 1302 Set_Posted (N); 1303 end if; 1304 end Error_Msg_NEL; 1305 1306 ------------------ 1307 -- Error_Msg_NW -- 1308 ------------------ 1309 1310 procedure Error_Msg_NW 1311 (Eflag : Boolean; 1312 Msg : String; 1313 N : Node_Or_Entity_Id) 1314 is 1315 begin 1316 if Eflag 1317 and then In_Extended_Main_Source_Unit (N) 1318 and then Comes_From_Source (N) 1319 then 1320 Error_Msg_NEL (Msg, N, N, Sloc (N)); 1321 end if; 1322 end Error_Msg_NW; 1323 1324 ----------------- 1325 -- Error_Msg_S -- 1326 ----------------- 1327 1328 procedure Error_Msg_S (Msg : String) is 1329 begin 1330 Error_Msg (Msg, Scan_Ptr); 1331 end Error_Msg_S; 1332 1333 ------------------ 1334 -- Error_Msg_SC -- 1335 ------------------ 1336 1337 procedure Error_Msg_SC (Msg : String) is 1338 begin 1339 -- If we are at end of file, post the flag after the previous token 1340 1341 if Token = Tok_EOF then 1342 Error_Msg_AP (Msg); 1343 1344 -- For all other cases the message is posted at the current token 1345 -- pointer position 1346 1347 else 1348 Error_Msg (Msg, Token_Ptr); 1349 end if; 1350 end Error_Msg_SC; 1351 1352 ------------------ 1353 -- Error_Msg_SP -- 1354 ------------------ 1355 1356 procedure Error_Msg_SP (Msg : String) is 1357 begin 1358 -- Note: in the case where there is no previous token, Prev_Token_Ptr 1359 -- is set to Source_First, which is a reasonable position for the 1360 -- error flag in this situation 1361 1362 Error_Msg (Msg, Prev_Token_Ptr); 1363 end Error_Msg_SP; 1364 1365 -------------- 1366 -- Finalize -- 1367 -------------- 1368 1369 procedure Finalize (Last_Call : Boolean) is 1370 Cur : Error_Msg_Id; 1371 Nxt : Error_Msg_Id; 1372 F : Error_Msg_Id; 1373 1374 procedure Delete_Warning (E : Error_Msg_Id); 1375 -- Delete a warning msg if not already deleted and adjust warning count 1376 1377 -------------------- 1378 -- Delete_Warning -- 1379 -------------------- 1380 1381 procedure Delete_Warning (E : Error_Msg_Id) is 1382 begin 1383 if not Errors.Table (E).Deleted then 1384 Errors.Table (E).Deleted := True; 1385 Warnings_Detected := Warnings_Detected - 1; 1386 1387 if Errors.Table (E).Info then 1388 Info_Messages := Info_Messages - 1; 1389 end if; 1390 1391 if Errors.Table (E).Warn_Err then 1392 Warnings_Treated_As_Errors := Warnings_Treated_As_Errors - 1; 1393 end if; 1394 end if; 1395 end Delete_Warning; 1396 1397 -- Start of processing for Finalize 1398 1399 begin 1400 -- Set Prev pointers 1401 1402 Cur := First_Error_Msg; 1403 while Cur /= No_Error_Msg loop 1404 Nxt := Errors.Table (Cur).Next; 1405 exit when Nxt = No_Error_Msg; 1406 Errors.Table (Nxt).Prev := Cur; 1407 Cur := Nxt; 1408 end loop; 1409 1410 -- Eliminate any duplicated error messages from the list. This is 1411 -- done after the fact to avoid problems with Change_Error_Text. 1412 1413 Cur := First_Error_Msg; 1414 while Cur /= No_Error_Msg loop 1415 Nxt := Errors.Table (Cur).Next; 1416 1417 F := Nxt; 1418 while F /= No_Error_Msg 1419 and then Errors.Table (F).Sptr = Errors.Table (Cur).Sptr 1420 loop 1421 Check_Duplicate_Message (Cur, F); 1422 F := Errors.Table (F).Next; 1423 end loop; 1424 1425 Cur := Nxt; 1426 end loop; 1427 1428 -- Mark any messages suppressed by specific warnings as Deleted 1429 1430 Cur := First_Error_Msg; 1431 while Cur /= No_Error_Msg loop 1432 declare 1433 CE : Error_Msg_Object renames Errors.Table (Cur); 1434 Tag : constant String := Get_Warning_Tag (Cur); 1435 1436 begin 1437 if (CE.Warn and not CE.Deleted) 1438 and then 1439 (Warning_Specifically_Suppressed (CE.Sptr, CE.Text, Tag) /= 1440 No_String 1441 or else 1442 Warning_Specifically_Suppressed (CE.Optr, CE.Text, Tag) /= 1443 No_String) 1444 then 1445 Delete_Warning (Cur); 1446 1447 -- If this is a continuation, delete previous parts of message 1448 1449 F := Cur; 1450 while Errors.Table (F).Msg_Cont loop 1451 F := Errors.Table (F).Prev; 1452 exit when F = No_Error_Msg; 1453 Delete_Warning (F); 1454 end loop; 1455 1456 -- Delete any following continuations 1457 1458 F := Cur; 1459 loop 1460 F := Errors.Table (F).Next; 1461 exit when F = No_Error_Msg; 1462 exit when not Errors.Table (F).Msg_Cont; 1463 Delete_Warning (F); 1464 end loop; 1465 end if; 1466 end; 1467 1468 Cur := Errors.Table (Cur).Next; 1469 end loop; 1470 1471 Finalize_Called := True; 1472 1473 -- Check consistency of specific warnings (may add warnings). We only 1474 -- do this on the last call, after all possible warnings are posted. 1475 1476 if Last_Call then 1477 Validate_Specific_Warnings (Error_Msg'Access); 1478 end if; 1479 end Finalize; 1480 1481 ---------------- 1482 -- First_Node -- 1483 ---------------- 1484 1485 function First_Node (C : Node_Id) return Node_Id is 1486 Orig : constant Node_Id := Original_Node (C); 1487 Loc : constant Source_Ptr := Sloc (Orig); 1488 Sfile : constant Source_File_Index := Get_Source_File_Index (Loc); 1489 Earliest : Node_Id; 1490 Eloc : Source_Ptr; 1491 1492 function Test_Earlier (N : Node_Id) return Traverse_Result; 1493 -- Function applied to every node in the construct 1494 1495 procedure Search_Tree_First is new Traverse_Proc (Test_Earlier); 1496 -- Create traversal procedure 1497 1498 ------------------ 1499 -- Test_Earlier -- 1500 ------------------ 1501 1502 function Test_Earlier (N : Node_Id) return Traverse_Result is 1503 Norig : constant Node_Id := Original_Node (N); 1504 Loc : constant Source_Ptr := Sloc (Norig); 1505 1506 begin 1507 -- Check for earlier 1508 1509 if Loc < Eloc 1510 1511 -- Ignore nodes with no useful location information 1512 1513 and then Loc /= Standard_Location 1514 and then Loc /= No_Location 1515 1516 -- Ignore nodes from a different file. This ensures against cases 1517 -- of strange foreign code somehow being present. We don't want 1518 -- wild placement of messages if that happens. 1519 1520 and then Get_Source_File_Index (Loc) = Sfile 1521 then 1522 Earliest := Norig; 1523 Eloc := Loc; 1524 end if; 1525 1526 return OK_Orig; 1527 end Test_Earlier; 1528 1529 -- Start of processing for First_Node 1530 1531 begin 1532 if Nkind (Orig) in N_Subexpr then 1533 Earliest := Orig; 1534 Eloc := Loc; 1535 Search_Tree_First (Orig); 1536 return Earliest; 1537 1538 else 1539 return Orig; 1540 end if; 1541 end First_Node; 1542 1543 ---------------- 1544 -- First_Sloc -- 1545 ---------------- 1546 1547 function First_Sloc (N : Node_Id) return Source_Ptr is 1548 SI : constant Source_File_Index := Source_Index (Get_Source_Unit (N)); 1549 SF : constant Source_Ptr := Source_First (SI); 1550 F : Node_Id; 1551 S : Source_Ptr; 1552 1553 begin 1554 F := First_Node (N); 1555 S := Sloc (F); 1556 1557 -- The following circuit is a bit subtle. When we have parenthesized 1558 -- expressions, then the Sloc will not record the location of the paren, 1559 -- but we would like to post the flag on the paren. So what we do is to 1560 -- crawl up the tree from the First_Node, adjusting the Sloc value for 1561 -- any parentheses we know are present. Yes, we know this circuit is not 1562 -- 100% reliable (e.g. because we don't record all possible paren level 1563 -- values), but this is only for an error message so it is good enough. 1564 1565 Node_Loop : loop 1566 Paren_Loop : for J in 1 .. Paren_Count (F) loop 1567 1568 -- We don't look more than 12 characters behind the current 1569 -- location, and in any case not past the front of the source. 1570 1571 Search_Loop : for K in 1 .. 12 loop 1572 exit Search_Loop when S = SF; 1573 1574 if Source_Text (SI) (S - 1) = '(' then 1575 S := S - 1; 1576 exit Search_Loop; 1577 1578 elsif Source_Text (SI) (S - 1) <= ' ' then 1579 S := S - 1; 1580 1581 else 1582 exit Search_Loop; 1583 end if; 1584 end loop Search_Loop; 1585 end loop Paren_Loop; 1586 1587 exit Node_Loop when F = N; 1588 F := Parent (F); 1589 exit Node_Loop when Nkind (F) not in N_Subexpr; 1590 end loop Node_Loop; 1591 1592 return S; 1593 end First_Sloc; 1594 1595 ----------------------- 1596 -- Get_Ignore_Errors -- 1597 ----------------------- 1598 1599 function Get_Ignore_Errors return Boolean is 1600 begin 1601 return Errors_Must_Be_Ignored; 1602 end Get_Ignore_Errors; 1603 1604 ---------------- 1605 -- Initialize -- 1606 ---------------- 1607 1608 procedure Initialize is 1609 begin 1610 Errors.Init; 1611 First_Error_Msg := No_Error_Msg; 1612 Last_Error_Msg := No_Error_Msg; 1613 Serious_Errors_Detected := 0; 1614 Total_Errors_Detected := 0; 1615 Warnings_Treated_As_Errors := 0; 1616 Warnings_Detected := 0; 1617 Info_Messages := 0; 1618 Warnings_As_Errors_Count := 0; 1619 Cur_Msg := No_Error_Msg; 1620 List_Pragmas.Init; 1621 1622 -- Initialize warnings tables 1623 1624 Warnings.Init; 1625 Specific_Warnings.Init; 1626 end Initialize; 1627 1628 ----------------- 1629 -- No_Warnings -- 1630 ----------------- 1631 1632 function No_Warnings (N : Node_Or_Entity_Id) return Boolean is 1633 begin 1634 if Error_Posted (N) then 1635 return True; 1636 1637 elsif Nkind (N) in N_Entity and then Has_Warnings_Off (N) then 1638 return True; 1639 1640 elsif Is_Entity_Name (N) 1641 and then Present (Entity (N)) 1642 and then Has_Warnings_Off (Entity (N)) 1643 then 1644 return True; 1645 1646 else 1647 return False; 1648 end if; 1649 end No_Warnings; 1650 1651 ------------- 1652 -- OK_Node -- 1653 ------------- 1654 1655 function OK_Node (N : Node_Id) return Boolean is 1656 K : constant Node_Kind := Nkind (N); 1657 1658 begin 1659 if Error_Posted (N) then 1660 return False; 1661 1662 elsif K in N_Has_Etype 1663 and then Present (Etype (N)) 1664 and then Error_Posted (Etype (N)) 1665 then 1666 return False; 1667 1668 elsif (K in N_Op 1669 or else K = N_Attribute_Reference 1670 or else K = N_Character_Literal 1671 or else K = N_Expanded_Name 1672 or else K = N_Identifier 1673 or else K = N_Operator_Symbol) 1674 and then Present (Entity (N)) 1675 and then Error_Posted (Entity (N)) 1676 then 1677 return False; 1678 else 1679 return True; 1680 end if; 1681 end OK_Node; 1682 1683 --------------------- 1684 -- Output_Messages -- 1685 --------------------- 1686 1687 procedure Output_Messages is 1688 E : Error_Msg_Id; 1689 Err_Flag : Boolean; 1690 1691 procedure Write_Error_Summary; 1692 -- Write error summary 1693 1694 procedure Write_Header (Sfile : Source_File_Index); 1695 -- Write header line (compiling or checking given file) 1696 1697 procedure Write_Max_Errors; 1698 -- Write message if max errors reached 1699 1700 ------------------------- 1701 -- Write_Error_Summary -- 1702 ------------------------- 1703 1704 procedure Write_Error_Summary is 1705 begin 1706 -- Extra blank line if error messages or source listing were output 1707 1708 if Total_Errors_Detected + Warnings_Detected > 0 or else Full_List 1709 then 1710 Write_Eol; 1711 end if; 1712 1713 -- Message giving number of lines read and number of errors detected. 1714 -- This normally goes to Standard_Output. The exception is when brief 1715 -- mode is not set, verbose mode (or full list mode) is set, and 1716 -- there are errors. In this case we send the message to standard 1717 -- error to make sure that *something* appears on standard error 1718 -- in an error situation. 1719 1720 if Total_Errors_Detected + Warnings_Detected /= 0 1721 and then not Brief_Output 1722 and then (Verbose_Mode or Full_List) 1723 then 1724 Set_Standard_Error; 1725 end if; 1726 1727 -- Message giving total number of lines. Don't give this message if 1728 -- the Main_Source line is unknown (this happens in error situations, 1729 -- e.g. when integrated preprocessing fails). 1730 1731 if Main_Source_File /= No_Source_File then 1732 Write_Str (" "); 1733 Write_Int (Num_Source_Lines (Main_Source_File)); 1734 1735 if Num_Source_Lines (Main_Source_File) = 1 then 1736 Write_Str (" line: "); 1737 else 1738 Write_Str (" lines: "); 1739 end if; 1740 end if; 1741 1742 if Total_Errors_Detected = 0 then 1743 Write_Str ("No errors"); 1744 1745 elsif Total_Errors_Detected = 1 then 1746 Write_Str ("1 error"); 1747 1748 else 1749 Write_Int (Total_Errors_Detected); 1750 Write_Str (" errors"); 1751 end if; 1752 1753 if Warnings_Detected - Info_Messages /= 0 then 1754 Write_Str (", "); 1755 Write_Int (Warnings_Detected); 1756 Write_Str (" warning"); 1757 1758 if Warnings_Detected - Info_Messages /= 1 then 1759 Write_Char ('s'); 1760 end if; 1761 1762 if Warning_Mode = Treat_As_Error then 1763 Write_Str (" (treated as error"); 1764 1765 if Warnings_Detected /= 1 then 1766 Write_Char ('s'); 1767 end if; 1768 1769 Write_Char (')'); 1770 1771 elsif Warnings_Treated_As_Errors /= 0 then 1772 Write_Str (" ("); 1773 Write_Int (Warnings_Treated_As_Errors); 1774 Write_Str (" treated as errors)"); 1775 end if; 1776 end if; 1777 1778 if Info_Messages /= 0 then 1779 Write_Str (", "); 1780 Write_Int (Info_Messages); 1781 Write_Str (" info message"); 1782 1783 if Info_Messages > 1 then 1784 Write_Char ('s'); 1785 end if; 1786 end if; 1787 1788 Write_Eol; 1789 Set_Standard_Output; 1790 end Write_Error_Summary; 1791 1792 ------------------ 1793 -- Write_Header -- 1794 ------------------ 1795 1796 procedure Write_Header (Sfile : Source_File_Index) is 1797 begin 1798 if Verbose_Mode or Full_List then 1799 if Original_Operating_Mode = Generate_Code then 1800 Write_Str ("Compiling: "); 1801 else 1802 Write_Str ("Checking: "); 1803 end if; 1804 1805 Write_Name (Full_File_Name (Sfile)); 1806 1807 if not Debug_Flag_7 then 1808 Write_Eol; 1809 Write_Str ("Source file time stamp: "); 1810 Write_Time_Stamp (Sfile); 1811 Write_Eol; 1812 Write_Str ("Compiled at: " & Compilation_Time); 1813 end if; 1814 1815 Write_Eol; 1816 end if; 1817 end Write_Header; 1818 1819 ---------------------- 1820 -- Write_Max_Errors -- 1821 ---------------------- 1822 1823 procedure Write_Max_Errors is 1824 begin 1825 if Maximum_Messages /= 0 then 1826 if Warnings_Detected >= Maximum_Messages then 1827 Set_Standard_Error; 1828 Write_Line ("maximum number of warnings output"); 1829 Write_Line ("any further warnings suppressed"); 1830 Set_Standard_Output; 1831 end if; 1832 1833 -- If too many errors print message 1834 1835 if Total_Errors_Detected >= Maximum_Messages then 1836 Set_Standard_Error; 1837 Write_Line ("fatal error: maximum number of errors detected"); 1838 Set_Standard_Output; 1839 end if; 1840 end if; 1841 end Write_Max_Errors; 1842 1843 -- Start of processing for Output_Messages 1844 1845 begin 1846 -- Error if Finalize has not been called 1847 1848 if not Finalize_Called then 1849 raise Program_Error; 1850 end if; 1851 1852 -- Reset current error source file if the main unit has a pragma 1853 -- Source_Reference. This ensures outputting the proper name of 1854 -- the source file in this situation. 1855 1856 if Main_Source_File = No_Source_File 1857 or else Num_SRef_Pragmas (Main_Source_File) /= 0 1858 then 1859 Current_Error_Source_File := No_Source_File; 1860 end if; 1861 1862 -- Brief Error mode 1863 1864 if Brief_Output or (not Full_List and not Verbose_Mode) then 1865 Set_Standard_Error; 1866 1867 E := First_Error_Msg; 1868 while E /= No_Error_Msg loop 1869 if not Errors.Table (E).Deleted and then not Debug_Flag_KK then 1870 if Full_Path_Name_For_Brief_Errors then 1871 Write_Name (Full_Ref_Name (Errors.Table (E).Sfile)); 1872 else 1873 Write_Name (Reference_Name (Errors.Table (E).Sfile)); 1874 end if; 1875 1876 Write_Char (':'); 1877 Write_Int (Int (Physical_To_Logical 1878 (Errors.Table (E).Line, 1879 Errors.Table (E).Sfile))); 1880 Write_Char (':'); 1881 1882 if Errors.Table (E).Col < 10 then 1883 Write_Char ('0'); 1884 end if; 1885 1886 Write_Int (Int (Errors.Table (E).Col)); 1887 Write_Str (": "); 1888 Output_Msg_Text (E); 1889 Write_Eol; 1890 end if; 1891 1892 E := Errors.Table (E).Next; 1893 end loop; 1894 1895 Set_Standard_Output; 1896 end if; 1897 1898 -- Full source listing case 1899 1900 if Full_List then 1901 List_Pragmas_Index := 1; 1902 List_Pragmas_Mode := True; 1903 E := First_Error_Msg; 1904 1905 -- Normal case, to stdout (copyright notice already output) 1906 1907 if Full_List_File_Name = null then 1908 if not Debug_Flag_7 then 1909 Write_Eol; 1910 end if; 1911 1912 -- Output to file 1913 1914 else 1915 Create_List_File_Access.all (Full_List_File_Name.all); 1916 Set_Special_Output (Write_List_Info_Access.all'Access); 1917 1918 -- Write copyright notice to file 1919 1920 if not Debug_Flag_7 then 1921 Write_Str ("GNAT "); 1922 Write_Str (Gnat_Version_String); 1923 Write_Eol; 1924 Write_Str ("Copyright 1992-" & 1925 Current_Year & 1926 ", Free Software Foundation, Inc."); 1927 Write_Eol; 1928 end if; 1929 end if; 1930 1931 -- First list extended main source file units with errors 1932 1933 for U in Main_Unit .. Last_Unit loop 1934 if In_Extended_Main_Source_Unit (Cunit_Entity (U)) 1935 1936 -- If debug flag d.m is set, only the main source is listed 1937 1938 and then (U = Main_Unit or else not Debug_Flag_Dot_M) 1939 1940 -- If the unit of the entity does not come from source, it is 1941 -- an implicit subprogram declaration for a child subprogram. 1942 -- Do not emit errors for it, they are listed with the body. 1943 1944 and then 1945 (No (Cunit_Entity (U)) 1946 or else Comes_From_Source (Cunit_Entity (U)) 1947 or else not Is_Subprogram (Cunit_Entity (U))) 1948 1949 -- If the compilation unit associated with this unit does not 1950 -- come from source, it means it is an instantiation that should 1951 -- not be included in the source listing. 1952 1953 and then Comes_From_Source (Cunit (U)) 1954 then 1955 declare 1956 Sfile : constant Source_File_Index := Source_Index (U); 1957 1958 begin 1959 Write_Eol; 1960 1961 -- Only write the header if Sfile is known 1962 1963 if Sfile /= No_Source_File then 1964 Write_Header (Sfile); 1965 Write_Eol; 1966 end if; 1967 1968 -- Normally, we don't want an "error messages from file" 1969 -- message when listing the entire file, so we set the 1970 -- current source file as the current error source file. 1971 -- However, the old style of doing things was to list this 1972 -- message if pragma Source_Reference is present, even for 1973 -- the main unit. Since the purpose of the -gnatd.m switch 1974 -- is to duplicate the old behavior, we skip the reset if 1975 -- this debug flag is set. 1976 1977 if not Debug_Flag_Dot_M then 1978 Current_Error_Source_File := Sfile; 1979 end if; 1980 1981 -- Only output the listing if Sfile is known, to avoid 1982 -- crashing the compiler. 1983 1984 if Sfile /= No_Source_File then 1985 for N in 1 .. Last_Source_Line (Sfile) loop 1986 while E /= No_Error_Msg 1987 and then Errors.Table (E).Deleted 1988 loop 1989 E := Errors.Table (E).Next; 1990 end loop; 1991 1992 Err_Flag := 1993 E /= No_Error_Msg 1994 and then Errors.Table (E).Line = N 1995 and then Errors.Table (E).Sfile = Sfile; 1996 1997 Output_Source_Line (N, Sfile, Err_Flag); 1998 1999 if Err_Flag then 2000 Output_Error_Msgs (E); 2001 2002 if not Debug_Flag_2 then 2003 Write_Eol; 2004 end if; 2005 end if; 2006 end loop; 2007 end if; 2008 end; 2009 end if; 2010 end loop; 2011 2012 -- Then output errors, if any, for subsidiary units not in the 2013 -- main extended unit. 2014 2015 -- Note: if debug flag d.m set, include errors for any units other 2016 -- than the main unit in the extended source unit (e.g. spec and 2017 -- subunits for a body). 2018 2019 while E /= No_Error_Msg 2020 and then (not In_Extended_Main_Source_Unit (Errors.Table (E).Sptr) 2021 or else 2022 (Debug_Flag_Dot_M 2023 and then Get_Source_Unit 2024 (Errors.Table (E).Sptr) /= Main_Unit)) 2025 loop 2026 if Errors.Table (E).Deleted then 2027 E := Errors.Table (E).Next; 2028 2029 else 2030 Write_Eol; 2031 Output_Source_Line 2032 (Errors.Table (E).Line, Errors.Table (E).Sfile, True); 2033 Output_Error_Msgs (E); 2034 end if; 2035 end loop; 2036 2037 -- If output to file, write extra copy of error summary to the 2038 -- output file, and then close it. 2039 2040 if Full_List_File_Name /= null then 2041 Write_Error_Summary; 2042 Write_Max_Errors; 2043 Close_List_File_Access.all; 2044 Cancel_Special_Output; 2045 end if; 2046 end if; 2047 2048 -- Verbose mode (error lines only with error flags). Normally this is 2049 -- ignored in full list mode, unless we are listing to a file, in which 2050 -- case we still generate -gnatv output to standard output. 2051 2052 if Verbose_Mode 2053 and then (not Full_List or else Full_List_File_Name /= null) 2054 then 2055 Write_Eol; 2056 2057 -- Output the header only when Main_Source_File is known 2058 2059 if Main_Source_File /= No_Source_File then 2060 Write_Header (Main_Source_File); 2061 end if; 2062 2063 E := First_Error_Msg; 2064 2065 -- Loop through error lines 2066 2067 while E /= No_Error_Msg loop 2068 if Errors.Table (E).Deleted then 2069 E := Errors.Table (E).Next; 2070 else 2071 Write_Eol; 2072 Output_Source_Line 2073 (Errors.Table (E).Line, Errors.Table (E).Sfile, True); 2074 Output_Error_Msgs (E); 2075 end if; 2076 end loop; 2077 end if; 2078 2079 -- Output error summary if verbose or full list mode 2080 2081 if Verbose_Mode or else Full_List then 2082 Write_Error_Summary; 2083 end if; 2084 2085 Write_Max_Errors; 2086 2087 if Warning_Mode = Treat_As_Error then 2088 Total_Errors_Detected := 2089 Total_Errors_Detected + Warnings_Detected - Info_Messages; 2090 Warnings_Detected := Info_Messages; 2091 end if; 2092 end Output_Messages; 2093 2094 ------------------------ 2095 -- Output_Source_Line -- 2096 ------------------------ 2097 2098 procedure Output_Source_Line 2099 (L : Physical_Line_Number; 2100 Sfile : Source_File_Index; 2101 Errs : Boolean) 2102 is 2103 S : Source_Ptr; 2104 C : Character; 2105 2106 Line_Number_Output : Boolean := False; 2107 -- Set True once line number is output 2108 2109 Empty_Line : Boolean := True; 2110 -- Set False if line includes at least one character 2111 2112 begin 2113 if Sfile /= Current_Error_Source_File then 2114 Write_Str ("==============Error messages for "); 2115 2116 case Sinput.File_Type (Sfile) is 2117 when Sinput.Src => 2118 Write_Str ("source"); 2119 2120 when Sinput.Config => 2121 Write_Str ("configuration pragmas"); 2122 2123 when Sinput.Def => 2124 Write_Str ("symbol definition"); 2125 2126 when Sinput.Preproc => 2127 Write_Str ("preprocessing data"); 2128 end case; 2129 2130 Write_Str (" file: "); 2131 Write_Name (Full_File_Name (Sfile)); 2132 Write_Eol; 2133 2134 if Num_SRef_Pragmas (Sfile) > 0 then 2135 Write_Str ("--------------Line numbers from file: "); 2136 Write_Name (Full_Ref_Name (Sfile)); 2137 Write_Str (" (starting at line "); 2138 Write_Int (Int (First_Mapped_Line (Sfile))); 2139 Write_Char (')'); 2140 Write_Eol; 2141 end if; 2142 2143 Current_Error_Source_File := Sfile; 2144 end if; 2145 2146 if Errs or List_Pragmas_Mode then 2147 Output_Line_Number (Physical_To_Logical (L, Sfile)); 2148 Line_Number_Output := True; 2149 end if; 2150 2151 S := Line_Start (L, Sfile); 2152 2153 loop 2154 C := Source_Text (Sfile) (S); 2155 exit when C = ASCII.LF or else C = ASCII.CR or else C = EOF; 2156 2157 -- Deal with matching entry in List_Pragmas table 2158 2159 if Full_List 2160 and then List_Pragmas_Index <= List_Pragmas.Last 2161 and then S = List_Pragmas.Table (List_Pragmas_Index).Ploc 2162 then 2163 case List_Pragmas.Table (List_Pragmas_Index).Ptyp is 2164 when Page => 2165 Write_Char (C); 2166 2167 -- Ignore if on line with errors so that error flags 2168 -- get properly listed with the error line . 2169 2170 if not Errs then 2171 Write_Char (ASCII.FF); 2172 end if; 2173 2174 when List_On => 2175 List_Pragmas_Mode := True; 2176 2177 if not Line_Number_Output then 2178 Output_Line_Number (Physical_To_Logical (L, Sfile)); 2179 Line_Number_Output := True; 2180 end if; 2181 2182 Write_Char (C); 2183 2184 when List_Off => 2185 Write_Char (C); 2186 List_Pragmas_Mode := False; 2187 end case; 2188 2189 List_Pragmas_Index := List_Pragmas_Index + 1; 2190 2191 -- Normal case (no matching entry in List_Pragmas table) 2192 2193 else 2194 if Errs or List_Pragmas_Mode then 2195 Write_Char (C); 2196 end if; 2197 end if; 2198 2199 Empty_Line := False; 2200 S := S + 1; 2201 end loop; 2202 2203 -- If we have output a source line, then add the line terminator, with 2204 -- training spaces preserved (so we output the line exactly as input). 2205 2206 if Line_Number_Output then 2207 if Empty_Line then 2208 Write_Eol; 2209 else 2210 Write_Eol_Keep_Blanks; 2211 end if; 2212 end if; 2213 end Output_Source_Line; 2214 2215 ----------------------------- 2216 -- Remove_Warning_Messages -- 2217 ----------------------------- 2218 2219 procedure Remove_Warning_Messages (N : Node_Id) is 2220 2221 function Check_For_Warning (N : Node_Id) return Traverse_Result; 2222 -- This function checks one node for a possible warning message 2223 2224 function Check_All_Warnings is new Traverse_Func (Check_For_Warning); 2225 -- This defines the traversal operation 2226 2227 ----------------------- 2228 -- Check_For_Warning -- 2229 ----------------------- 2230 2231 function Check_For_Warning (N : Node_Id) return Traverse_Result is 2232 Loc : constant Source_Ptr := Sloc (N); 2233 E : Error_Msg_Id; 2234 2235 function To_Be_Removed (E : Error_Msg_Id) return Boolean; 2236 -- Returns True for a message that is to be removed. Also adjusts 2237 -- warning count appropriately. 2238 2239 ------------------- 2240 -- To_Be_Removed -- 2241 ------------------- 2242 2243 function To_Be_Removed (E : Error_Msg_Id) return Boolean is 2244 begin 2245 if E /= No_Error_Msg 2246 2247 -- Don't remove if location does not match 2248 2249 and then Errors.Table (E).Optr = Loc 2250 2251 -- Don't remove if not warning/info message. Note that we do 2252 -- not remove style messages here. They are warning messages 2253 -- but not ones we want removed in this context. 2254 2255 and then Errors.Table (E).Warn 2256 2257 -- Don't remove unconditional messages 2258 2259 and then not Errors.Table (E).Uncond 2260 then 2261 Warnings_Detected := Warnings_Detected - 1; 2262 2263 if Errors.Table (E).Info then 2264 Info_Messages := Info_Messages - 1; 2265 end if; 2266 2267 return True; 2268 2269 -- No removal required 2270 2271 else 2272 return False; 2273 end if; 2274 end To_Be_Removed; 2275 2276 -- Start of processing for Check_For_Warnings 2277 2278 begin 2279 while To_Be_Removed (First_Error_Msg) loop 2280 First_Error_Msg := Errors.Table (First_Error_Msg).Next; 2281 end loop; 2282 2283 if First_Error_Msg = No_Error_Msg then 2284 Last_Error_Msg := No_Error_Msg; 2285 end if; 2286 2287 E := First_Error_Msg; 2288 while E /= No_Error_Msg loop 2289 while To_Be_Removed (Errors.Table (E).Next) loop 2290 Errors.Table (E).Next := 2291 Errors.Table (Errors.Table (E).Next).Next; 2292 2293 if Errors.Table (E).Next = No_Error_Msg then 2294 Last_Error_Msg := E; 2295 end if; 2296 end loop; 2297 2298 E := Errors.Table (E).Next; 2299 end loop; 2300 2301 if Nkind (N) = N_Raise_Constraint_Error 2302 and then Original_Node (N) /= N 2303 and then No (Condition (N)) 2304 then 2305 -- Warnings may have been posted on subexpressions of the original 2306 -- tree. We place the original node back on the tree to remove 2307 -- those warnings, whose sloc do not match those of any node in 2308 -- the current tree. Given that we are in unreachable code, this 2309 -- modification to the tree is harmless. 2310 2311 declare 2312 Status : Traverse_Final_Result; 2313 2314 begin 2315 if Is_List_Member (N) then 2316 Set_Condition (N, Original_Node (N)); 2317 Status := Check_All_Warnings (Condition (N)); 2318 else 2319 Rewrite (N, Original_Node (N)); 2320 Status := Check_All_Warnings (N); 2321 end if; 2322 2323 return Status; 2324 end; 2325 2326 else 2327 return OK; 2328 end if; 2329 end Check_For_Warning; 2330 2331 -- Start of processing for Remove_Warning_Messages 2332 2333 begin 2334 if Warnings_Detected /= 0 then 2335 declare 2336 Discard : Traverse_Final_Result; 2337 pragma Warnings (Off, Discard); 2338 2339 begin 2340 Discard := Check_All_Warnings (N); 2341 end; 2342 end if; 2343 end Remove_Warning_Messages; 2344 2345 procedure Remove_Warning_Messages (L : List_Id) is 2346 Stat : Node_Id; 2347 begin 2348 if Is_Non_Empty_List (L) then 2349 Stat := First (L); 2350 while Present (Stat) loop 2351 Remove_Warning_Messages (Stat); 2352 Next (Stat); 2353 end loop; 2354 end if; 2355 end Remove_Warning_Messages; 2356 2357 ---------------------- 2358 -- Adjust_Name_Case -- 2359 ---------------------- 2360 2361 procedure Adjust_Name_Case (Loc : Source_Ptr) is 2362 begin 2363 -- We have an all lower case name from Namet, and now we want to set 2364 -- the appropriate case. If possible we copy the actual casing from 2365 -- the source. If not we use standard identifier casing. 2366 2367 declare 2368 Src_Ind : constant Source_File_Index := Get_Source_File_Index (Loc); 2369 Sbuffer : Source_Buffer_Ptr; 2370 Ref_Ptr : Integer; 2371 Src_Ptr : Source_Ptr; 2372 2373 begin 2374 Ref_Ptr := 1; 2375 Src_Ptr := Loc; 2376 2377 -- For standard locations, always use mixed case 2378 2379 if Loc <= No_Location then 2380 Set_Casing (Mixed_Case); 2381 2382 else 2383 -- Determine if the reference we are dealing with corresponds to 2384 -- text at the point of the error reference. This will often be 2385 -- the case for simple identifier references, and is the case 2386 -- where we can copy the casing from the source. 2387 2388 Sbuffer := Source_Text (Src_Ind); 2389 2390 while Ref_Ptr <= Name_Len loop 2391 exit when 2392 Fold_Lower (Sbuffer (Src_Ptr)) /= 2393 Fold_Lower (Name_Buffer (Ref_Ptr)); 2394 Ref_Ptr := Ref_Ptr + 1; 2395 Src_Ptr := Src_Ptr + 1; 2396 end loop; 2397 2398 -- If we get through the loop without a mismatch, then output the 2399 -- name the way it is cased in the source program 2400 2401 if Ref_Ptr > Name_Len then 2402 Src_Ptr := Loc; 2403 2404 for J in 1 .. Name_Len loop 2405 Name_Buffer (J) := Sbuffer (Src_Ptr); 2406 Src_Ptr := Src_Ptr + 1; 2407 end loop; 2408 2409 -- Otherwise set the casing using the default identifier casing 2410 2411 else 2412 Set_Casing (Identifier_Casing (Src_Ind), Mixed_Case); 2413 end if; 2414 end if; 2415 end; 2416 end Adjust_Name_Case; 2417 2418 --------------------------- 2419 -- Set_Identifier_Casing -- 2420 --------------------------- 2421 2422 procedure Set_Identifier_Casing 2423 (Identifier_Name : System.Address; 2424 File_Name : System.Address) 2425 is 2426 Ident : constant Big_String_Ptr := To_Big_String_Ptr (Identifier_Name); 2427 File : constant Big_String_Ptr := To_Big_String_Ptr (File_Name); 2428 Flen : Natural; 2429 2430 Desired_Case : Casing_Type := Mixed_Case; 2431 -- Casing required for result. Default value of Mixed_Case is used if 2432 -- for some reason we cannot find the right file name in the table. 2433 2434 begin 2435 -- Get length of file name 2436 2437 Flen := 0; 2438 while File (Flen + 1) /= ASCII.NUL loop 2439 Flen := Flen + 1; 2440 end loop; 2441 2442 -- Loop through file names to find matching one. This is a bit slow, but 2443 -- we only do it in error situations so it is not so terrible. Note that 2444 -- if the loop does not exit, then the desired case will be left set to 2445 -- Mixed_Case, this can happen if the name was not in canonical form. 2446 2447 for J in 1 .. Last_Source_File loop 2448 Get_Name_String (Full_Debug_Name (J)); 2449 2450 if Name_Len = Flen 2451 and then Name_Buffer (1 .. Name_Len) = String (File (1 .. Flen)) 2452 then 2453 Desired_Case := Identifier_Casing (J); 2454 exit; 2455 end if; 2456 end loop; 2457 2458 -- Copy identifier as given to Name_Buffer 2459 2460 for J in Name_Buffer'Range loop 2461 Name_Buffer (J) := Ident (J); 2462 2463 if Name_Buffer (J) = ASCII.NUL then 2464 Name_Len := J - 1; 2465 exit; 2466 end if; 2467 end loop; 2468 2469 Set_Casing (Desired_Case); 2470 end Set_Identifier_Casing; 2471 2472 ----------------------- 2473 -- Set_Ignore_Errors -- 2474 ----------------------- 2475 2476 procedure Set_Ignore_Errors (To : Boolean) is 2477 begin 2478 Errors_Must_Be_Ignored := To; 2479 end Set_Ignore_Errors; 2480 2481 ------------------------------ 2482 -- Set_Msg_Insertion_Column -- 2483 ------------------------------ 2484 2485 procedure Set_Msg_Insertion_Column is 2486 begin 2487 if RM_Column_Check then 2488 Set_Msg_Str (" in column "); 2489 Set_Msg_Int (Int (Error_Msg_Col) + 1); 2490 end if; 2491 end Set_Msg_Insertion_Column; 2492 2493 ---------------------------- 2494 -- Set_Msg_Insertion_Node -- 2495 ---------------------------- 2496 2497 procedure Set_Msg_Insertion_Node is 2498 K : Node_Kind; 2499 2500 begin 2501 Suppress_Message := 2502 Error_Msg_Node_1 = Error 2503 or else Error_Msg_Node_1 = Any_Type; 2504 2505 if Error_Msg_Node_1 = Empty then 2506 Set_Msg_Blank_Conditional; 2507 Set_Msg_Str ("<empty>"); 2508 2509 elsif Error_Msg_Node_1 = Error then 2510 Set_Msg_Blank; 2511 Set_Msg_Str ("<error>"); 2512 2513 elsif Error_Msg_Node_1 = Standard_Void_Type then 2514 Set_Msg_Blank; 2515 Set_Msg_Str ("procedure name"); 2516 2517 elsif Nkind (Error_Msg_Node_1) in N_Entity 2518 and then Ekind (Error_Msg_Node_1) = E_Anonymous_Access_Subprogram_Type 2519 then 2520 Set_Msg_Blank; 2521 Set_Msg_Str ("access to subprogram"); 2522 2523 else 2524 Set_Msg_Blank_Conditional; 2525 2526 -- Output name 2527 2528 K := Nkind (Error_Msg_Node_1); 2529 2530 -- If we have operator case, skip quotes since name of operator 2531 -- itself will supply the required quotations. An operator can be an 2532 -- applied use in an expression or an explicit operator symbol, or an 2533 -- identifier whose name indicates it is an operator. 2534 2535 if K in N_Op 2536 or else K = N_Operator_Symbol 2537 or else K = N_Defining_Operator_Symbol 2538 or else ((K = N_Identifier or else K = N_Defining_Identifier) 2539 and then Is_Operator_Name (Chars (Error_Msg_Node_1))) 2540 then 2541 Set_Msg_Node (Error_Msg_Node_1); 2542 2543 -- Normal case, not an operator, surround with quotes 2544 2545 else 2546 Set_Msg_Quote; 2547 Set_Qualification (Error_Msg_Qual_Level, Error_Msg_Node_1); 2548 Set_Msg_Node (Error_Msg_Node_1); 2549 Set_Msg_Quote; 2550 end if; 2551 end if; 2552 2553 -- The following assignment ensures that a second ampersand insertion 2554 -- character will correspond to the Error_Msg_Node_2 parameter. We 2555 -- suppress possible validity checks in case operating in -gnatVa mode, 2556 -- and Error_Msg_Node_2 is not needed and has not been set. 2557 2558 declare 2559 pragma Suppress (Range_Check); 2560 begin 2561 Error_Msg_Node_1 := Error_Msg_Node_2; 2562 end; 2563 end Set_Msg_Insertion_Node; 2564 2565 -------------------------------------- 2566 -- Set_Msg_Insertion_Type_Reference -- 2567 -------------------------------------- 2568 2569 procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr) is 2570 Ent : Entity_Id; 2571 2572 begin 2573 Set_Msg_Blank; 2574 2575 if Error_Msg_Node_1 = Standard_Void_Type then 2576 Set_Msg_Str ("package or procedure name"); 2577 return; 2578 2579 elsif Error_Msg_Node_1 = Standard_Exception_Type then 2580 Set_Msg_Str ("exception name"); 2581 return; 2582 2583 elsif Error_Msg_Node_1 = Any_Access 2584 or else Error_Msg_Node_1 = Any_Array 2585 or else Error_Msg_Node_1 = Any_Boolean 2586 or else Error_Msg_Node_1 = Any_Character 2587 or else Error_Msg_Node_1 = Any_Composite 2588 or else Error_Msg_Node_1 = Any_Discrete 2589 or else Error_Msg_Node_1 = Any_Fixed 2590 or else Error_Msg_Node_1 = Any_Integer 2591 or else Error_Msg_Node_1 = Any_Modular 2592 or else Error_Msg_Node_1 = Any_Numeric 2593 or else Error_Msg_Node_1 = Any_Real 2594 or else Error_Msg_Node_1 = Any_Scalar 2595 or else Error_Msg_Node_1 = Any_String 2596 then 2597 Get_Unqualified_Decoded_Name_String (Chars (Error_Msg_Node_1)); 2598 Set_Msg_Name_Buffer; 2599 return; 2600 2601 elsif Error_Msg_Node_1 = Universal_Real then 2602 Set_Msg_Str ("type universal real"); 2603 return; 2604 2605 elsif Error_Msg_Node_1 = Universal_Integer then 2606 Set_Msg_Str ("type universal integer"); 2607 return; 2608 2609 elsif Error_Msg_Node_1 = Universal_Fixed then 2610 Set_Msg_Str ("type universal fixed"); 2611 return; 2612 end if; 2613 2614 -- Special case of anonymous array 2615 2616 if Nkind (Error_Msg_Node_1) in N_Entity 2617 and then Is_Array_Type (Error_Msg_Node_1) 2618 and then Present (Related_Array_Object (Error_Msg_Node_1)) 2619 then 2620 Set_Msg_Str ("type of "); 2621 Set_Msg_Node (Related_Array_Object (Error_Msg_Node_1)); 2622 Set_Msg_Str (" declared"); 2623 Set_Msg_Insertion_Line_Number 2624 (Sloc (Related_Array_Object (Error_Msg_Node_1)), Flag); 2625 return; 2626 end if; 2627 2628 -- If we fall through, it is not a special case, so first output 2629 -- the name of the type, preceded by private for a private type 2630 2631 if Is_Private_Type (Error_Msg_Node_1) then 2632 Set_Msg_Str ("private type "); 2633 else 2634 Set_Msg_Str ("type "); 2635 end if; 2636 2637 Ent := Error_Msg_Node_1; 2638 2639 if Is_Internal_Name (Chars (Ent)) then 2640 Unwind_Internal_Type (Ent); 2641 end if; 2642 2643 -- Types in Standard are displayed as "Standard.name" 2644 2645 if Sloc (Ent) <= Standard_Location then 2646 Set_Msg_Quote; 2647 Set_Msg_Str ("Standard."); 2648 Set_Msg_Node (Ent); 2649 Add_Class; 2650 Set_Msg_Quote; 2651 2652 -- Types in other language defined units are displayed as 2653 -- "package-name.type-name" 2654 2655 elsif 2656 Is_Predefined_File_Name (Unit_File_Name (Get_Source_Unit (Ent))) 2657 then 2658 Get_Unqualified_Decoded_Name_String 2659 (Unit_Name (Get_Source_Unit (Ent))); 2660 Name_Len := Name_Len - 2; 2661 Set_Msg_Blank_Conditional; 2662 Set_Msg_Quote; 2663 Set_Casing (Mixed_Case); 2664 Set_Msg_Name_Buffer; 2665 Set_Msg_Char ('.'); 2666 Set_Casing (Mixed_Case); 2667 Set_Msg_Node (Ent); 2668 Add_Class; 2669 Set_Msg_Quote; 2670 2671 -- All other types display as "type name" defined at line xxx 2672 -- possibly qualified if qualification is requested. 2673 2674 else 2675 Set_Msg_Quote; 2676 Set_Qualification (Error_Msg_Qual_Level, Ent); 2677 Set_Msg_Node (Ent); 2678 Add_Class; 2679 2680 -- If we did not print a name (e.g. in the case of an anonymous 2681 -- subprogram type), there is no name to print, so remove quotes. 2682 2683 if Buffer_Ends_With ('"') then 2684 Buffer_Remove ('"'); 2685 else 2686 Set_Msg_Quote; 2687 end if; 2688 end if; 2689 2690 -- If the original type did not come from a predefined file, add the 2691 -- location where the type was defined. 2692 2693 if Sloc (Error_Msg_Node_1) > Standard_Location 2694 and then 2695 not Is_Predefined_File_Name 2696 (Unit_File_Name (Get_Source_Unit (Error_Msg_Node_1))) 2697 then 2698 Set_Msg_Str (" defined"); 2699 Set_Msg_Insertion_Line_Number (Sloc (Error_Msg_Node_1), Flag); 2700 2701 -- If it did come from a predefined file, deal with the case where 2702 -- this was a file with a generic instantiation from elsewhere. 2703 2704 else 2705 if Sloc (Error_Msg_Node_1) > Standard_Location then 2706 declare 2707 Iloc : constant Source_Ptr := 2708 Instantiation_Location (Sloc (Error_Msg_Node_1)); 2709 2710 begin 2711 if Iloc /= No_Location 2712 and then not Suppress_Instance_Location 2713 then 2714 Set_Msg_Str (" from instance"); 2715 Set_Msg_Insertion_Line_Number (Iloc, Flag); 2716 end if; 2717 end; 2718 end if; 2719 end if; 2720 end Set_Msg_Insertion_Type_Reference; 2721 2722 --------------------------------- 2723 -- Set_Msg_Insertion_Unit_Name -- 2724 --------------------------------- 2725 2726 procedure Set_Msg_Insertion_Unit_Name (Suffix : Boolean := True) is 2727 begin 2728 if Error_Msg_Unit_1 = No_Unit_Name then 2729 null; 2730 2731 elsif Error_Msg_Unit_1 = Error_Unit_Name then 2732 Set_Msg_Blank; 2733 Set_Msg_Str ("<error>"); 2734 2735 else 2736 Get_Unit_Name_String (Error_Msg_Unit_1, Suffix); 2737 Set_Msg_Blank; 2738 Set_Msg_Quote; 2739 Set_Msg_Name_Buffer; 2740 Set_Msg_Quote; 2741 end if; 2742 2743 -- The following assignment ensures that a second percent insertion 2744 -- character will correspond to the Error_Msg_Unit_2 parameter. We 2745 -- suppress possible validity checks in case operating in -gnatVa mode, 2746 -- and Error_Msg_Unit_2 is not needed and has not been set. 2747 2748 declare 2749 pragma Suppress (Range_Check); 2750 begin 2751 Error_Msg_Unit_1 := Error_Msg_Unit_2; 2752 end; 2753 end Set_Msg_Insertion_Unit_Name; 2754 2755 ------------------ 2756 -- Set_Msg_Node -- 2757 ------------------ 2758 2759 procedure Set_Msg_Node (Node : Node_Id) is 2760 Loc : Source_Ptr; 2761 Ent : Entity_Id; 2762 Nam : Name_Id; 2763 2764 begin 2765 case Nkind (Node) is 2766 when N_Designator => 2767 Set_Msg_Node (Name (Node)); 2768 Set_Msg_Char ('.'); 2769 Set_Msg_Node (Identifier (Node)); 2770 return; 2771 2772 when N_Defining_Program_Unit_Name => 2773 Set_Msg_Node (Name (Node)); 2774 Set_Msg_Char ('.'); 2775 Set_Msg_Node (Defining_Identifier (Node)); 2776 return; 2777 2778 when N_Selected_Component | N_Expanded_Name => 2779 Set_Msg_Node (Prefix (Node)); 2780 Set_Msg_Char ('.'); 2781 Set_Msg_Node (Selector_Name (Node)); 2782 return; 2783 2784 when others => 2785 null; 2786 end case; 2787 2788 -- The only remaining possibilities are identifiers, defining 2789 -- identifiers, pragmas, and pragma argument associations. 2790 2791 if Nkind (Node) = N_Pragma then 2792 Nam := Pragma_Name (Node); 2793 Loc := Sloc (Node); 2794 2795 -- The other cases have Chars fields 2796 2797 -- First deal with internal names, which generally represent something 2798 -- gone wrong. First attempt: if this is a rewritten node that rewrites 2799 -- something with a Chars field that is not an internal name, use that. 2800 2801 elsif Is_Internal_Name (Chars (Node)) 2802 and then Nkind (Original_Node (Node)) in N_Has_Chars 2803 and then not Is_Internal_Name (Chars (Original_Node (Node))) 2804 then 2805 Nam := Chars (Original_Node (Node)); 2806 Loc := Sloc (Original_Node (Node)); 2807 2808 -- Another shot for internal names, in the case of internal type names, 2809 -- we try to find a reasonable representation for the external name. 2810 2811 elsif Is_Internal_Name (Chars (Node)) 2812 and then 2813 ((Is_Entity_Name (Node) 2814 and then Present (Entity (Node)) 2815 and then Is_Type (Entity (Node))) 2816 or else 2817 (Nkind (Node) = N_Defining_Identifier and then Is_Type (Node))) 2818 then 2819 if Nkind (Node) = N_Identifier then 2820 Ent := Entity (Node); 2821 else 2822 Ent := Node; 2823 end if; 2824 2825 Loc := Sloc (Ent); 2826 2827 -- If the type is the designated type of an access_to_subprogram, 2828 -- then there is no name to provide in the call. 2829 2830 if Ekind (Ent) = E_Subprogram_Type then 2831 return; 2832 2833 -- Otherwise, we will be able to find some kind of name to output 2834 2835 else 2836 Unwind_Internal_Type (Ent); 2837 Nam := Chars (Ent); 2838 end if; 2839 2840 -- If not internal name, or if we could not find a reasonable possible 2841 -- substitution for the internal name, just use name in Chars field. 2842 2843 else 2844 Nam := Chars (Node); 2845 Loc := Sloc (Node); 2846 end if; 2847 2848 -- At this stage, the name to output is in Nam 2849 2850 Get_Unqualified_Decoded_Name_String (Nam); 2851 2852 -- Remove trailing upper case letters from the name (useful for 2853 -- dealing with some cases of internal names). 2854 2855 while Name_Len > 1 and then Name_Buffer (Name_Len) in 'A' .. 'Z' loop 2856 Name_Len := Name_Len - 1; 2857 end loop; 2858 2859 -- If we have any of the names from standard that start with the 2860 -- characters "any " (e.g. Any_Type), then kill the message since 2861 -- almost certainly it is a junk cascaded message. 2862 2863 if Name_Len > 4 2864 and then Name_Buffer (1 .. 4) = "any " 2865 then 2866 Kill_Message := True; 2867 end if; 2868 2869 -- If we still have an internal name, kill the message (will only 2870 -- work if we already had errors!) 2871 2872 if Is_Internal_Name then 2873 Kill_Message := True; 2874 end if; 2875 -- Remaining step is to adjust casing and possibly add 'Class 2876 2877 Adjust_Name_Case (Loc); 2878 Set_Msg_Name_Buffer; 2879 Add_Class; 2880 end Set_Msg_Node; 2881 2882 ------------------ 2883 -- Set_Msg_Text -- 2884 ------------------ 2885 2886 procedure Set_Msg_Text (Text : String; Flag : Source_Ptr) is 2887 C : Character; -- Current character 2888 P : Natural; -- Current index; 2889 2890 procedure Skip_Msg_Insertion_Warning (C : Character); 2891 -- Deal with ? ?? ?x? ?X? ?*? ?$? insertion sequences (and the same 2892 -- sequences using < instead of ?). The caller has already bumped 2893 -- the pointer past the initial ? or < and C is set to this initial 2894 -- character (? or <). This procedure skips past the rest of the 2895 -- sequence. We do not need to set Msg_Insertion_Char, since this 2896 -- was already done during the message prescan. 2897 2898 -------------------------------- 2899 -- Skip_Msg_Insertion_Warning -- 2900 -------------------------------- 2901 2902 procedure Skip_Msg_Insertion_Warning (C : Character) is 2903 begin 2904 if P <= Text'Last and then Text (P) = C then 2905 P := P + 1; 2906 2907 elsif P + 1 <= Text'Last 2908 and then (Text (P) in 'a' .. 'z' 2909 or else 2910 Text (P) in 'A' .. 'Z' 2911 or else 2912 Text (P) = '*' 2913 or else 2914 Text (P) = '$') 2915 and then Text (P + 1) = C 2916 then 2917 P := P + 2; 2918 end if; 2919 end Skip_Msg_Insertion_Warning; 2920 2921 -- Start of processing for Set_Msg_Text 2922 2923 begin 2924 Manual_Quote_Mode := False; 2925 Msglen := 0; 2926 Flag_Source := Get_Source_File_Index (Flag); 2927 2928 -- Skip info: at start, we have recorded this in Is_Info_Msg, and this 2929 -- will be used (Info field in error message object) to put back the 2930 -- string when it is printed. We need to do this, or we get confused 2931 -- with instantiation continuations. 2932 2933 if Text'Length > 6 2934 and then Text (Text'First .. Text'First + 5) = "info: " 2935 then 2936 P := Text'First + 6; 2937 else 2938 P := Text'First; 2939 end if; 2940 2941 -- Loop through characters of message 2942 2943 while P <= Text'Last loop 2944 C := Text (P); 2945 P := P + 1; 2946 2947 -- Check for insertion character or sequence 2948 2949 case C is 2950 when '%' => 2951 if P <= Text'Last and then Text (P) = '%' then 2952 P := P + 1; 2953 Set_Msg_Insertion_Name_Literal; 2954 else 2955 Set_Msg_Insertion_Name; 2956 end if; 2957 2958 when '$' => 2959 if P <= Text'Last and then Text (P) = '$' then 2960 P := P + 1; 2961 Set_Msg_Insertion_Unit_Name (Suffix => False); 2962 else 2963 Set_Msg_Insertion_Unit_Name; 2964 end if; 2965 2966 when '{' => 2967 Set_Msg_Insertion_File_Name; 2968 2969 when '}' => 2970 Set_Msg_Insertion_Type_Reference (Flag); 2971 2972 when '*' => 2973 Set_Msg_Insertion_Reserved_Name; 2974 2975 when '&' => 2976 Set_Msg_Insertion_Node; 2977 2978 when '#' => 2979 Set_Msg_Insertion_Line_Number (Error_Msg_Sloc, Flag); 2980 2981 when '\' => 2982 Continuation := True; 2983 2984 if Text (P) = '\' then 2985 Continuation_New_Line := True; 2986 P := P + 1; 2987 end if; 2988 2989 when '@' => 2990 Set_Msg_Insertion_Column; 2991 2992 when '>' => 2993 Set_Msg_Insertion_Run_Time_Name; 2994 2995 when '^' => 2996 Set_Msg_Insertion_Uint; 2997 2998 when '`' => 2999 Manual_Quote_Mode := not Manual_Quote_Mode; 3000 Set_Msg_Char ('"'); 3001 3002 when '!' => 3003 null; -- already dealt with 3004 3005 when '?' => 3006 Skip_Msg_Insertion_Warning ('?'); 3007 3008 when '<' => 3009 Skip_Msg_Insertion_Warning ('<'); 3010 3011 when '|' => 3012 null; -- already dealt with 3013 3014 when ''' => 3015 Set_Msg_Char (Text (P)); 3016 P := P + 1; 3017 3018 when '~' => 3019 Set_Msg_Str (Error_Msg_String (1 .. Error_Msg_Strlen)); 3020 3021 -- Upper case letter 3022 3023 when 'A' .. 'Z' => 3024 3025 -- Start of reserved word if two or more 3026 3027 if P <= Text'Last and then Text (P) in 'A' .. 'Z' then 3028 P := P - 1; 3029 Set_Msg_Insertion_Reserved_Word (Text, P); 3030 3031 -- Single upper case letter is just inserted 3032 3033 else 3034 Set_Msg_Char (C); 3035 end if; 3036 3037 -- '[' (will be/would have been raised at run time) 3038 3039 when '[' => 3040 if Is_Warning_Msg then 3041 Set_Msg_Str ("will be raised at run time"); 3042 else 3043 Set_Msg_Str ("would have been raised at run time"); 3044 end if; 3045 3046 -- ']' (may be/might have been raised at run time) 3047 3048 when ']' => 3049 if Is_Warning_Msg then 3050 Set_Msg_Str ("may be raised at run time"); 3051 else 3052 Set_Msg_Str ("might have been raised at run time"); 3053 end if; 3054 3055 -- Normal character with no special treatment 3056 3057 when others => 3058 Set_Msg_Char (C); 3059 end case; 3060 end loop; 3061 end Set_Msg_Text; 3062 3063 ---------------- 3064 -- Set_Posted -- 3065 ---------------- 3066 3067 procedure Set_Posted (N : Node_Id) is 3068 P : Node_Id; 3069 3070 begin 3071 if Is_Serious_Error then 3072 3073 -- We always set Error_Posted on the node itself 3074 3075 Set_Error_Posted (N); 3076 3077 -- If it is a subexpression, then set Error_Posted on parents up to 3078 -- and including the first non-subexpression construct. This helps 3079 -- avoid cascaded error messages within a single expression. 3080 3081 P := N; 3082 loop 3083 P := Parent (P); 3084 exit when No (P); 3085 Set_Error_Posted (P); 3086 exit when Nkind (P) not in N_Subexpr; 3087 end loop; 3088 3089 if Nkind_In (P, N_Pragma_Argument_Association, 3090 N_Component_Association, 3091 N_Discriminant_Association, 3092 N_Generic_Association, 3093 N_Parameter_Association) 3094 then 3095 Set_Error_Posted (Parent (P)); 3096 end if; 3097 3098 -- A special check, if we just posted an error on an attribute 3099 -- definition clause, then also set the entity involved as posted. 3100 -- For example, this stops complaining about the alignment after 3101 -- complaining about the size, which is likely to be useless. 3102 3103 if Nkind (P) = N_Attribute_Definition_Clause then 3104 if Is_Entity_Name (Name (P)) then 3105 Set_Error_Posted (Entity (Name (P))); 3106 end if; 3107 end if; 3108 end if; 3109 end Set_Posted; 3110 3111 ----------------------- 3112 -- Set_Qualification -- 3113 ----------------------- 3114 3115 procedure Set_Qualification (N : Nat; E : Entity_Id) is 3116 begin 3117 if N /= 0 and then Scope (E) /= Standard_Standard then 3118 Set_Qualification (N - 1, Scope (E)); 3119 Set_Msg_Node (Scope (E)); 3120 Set_Msg_Char ('.'); 3121 end if; 3122 end Set_Qualification; 3123 3124 ------------------------ 3125 -- Special_Msg_Delete -- 3126 ------------------------ 3127 3128 -- Is it really right to have all this specialized knowledge in errout? 3129 3130 function Special_Msg_Delete 3131 (Msg : String; 3132 N : Node_Or_Entity_Id; 3133 E : Node_Or_Entity_Id) return Boolean 3134 is 3135 begin 3136 -- Never delete messages in -gnatdO mode 3137 3138 if Debug_Flag_OO then 3139 return False; 3140 3141 -- Processing for "atomic access cannot be guaranteed" 3142 3143 elsif Msg = "atomic access to & cannot be guaranteed" then 3144 3145 -- When an atomic object refers to a non-atomic type in the same 3146 -- scope, we implicitly make the type atomic. In the non-error case 3147 -- this is surely safe (and in fact prevents an error from occurring 3148 -- if the type is not atomic by default). But if the object cannot be 3149 -- made atomic, then we introduce an extra junk message by this 3150 -- manipulation, which we get rid of here. 3151 3152 -- We identify this case by the fact that it references a type for 3153 -- which Is_Atomic is set, but there is no Atomic pragma setting it. 3154 3155 if Is_Type (E) 3156 and then Is_Atomic (E) 3157 and then No (Get_Rep_Pragma (E, Name_Atomic)) 3158 then 3159 return True; 3160 end if; 3161 3162 -- Similar processing for "volatile full access cannot be guaranteed" 3163 3164 elsif Msg = "volatile full access to & cannot be guaranteed" then 3165 if Is_Type (E) 3166 and then Is_Volatile_Full_Access (E) 3167 and then No (Get_Rep_Pragma (E, Name_Volatile_Full_Access)) 3168 then 3169 return True; 3170 end if; 3171 3172 -- Processing for "Size too small" messages 3173 3174 elsif Msg = "size for& too small, minimum allowed is ^" then 3175 3176 -- Suppress "size too small" errors in CodePeer mode, since code may 3177 -- be analyzed in a different configuration than the one used for 3178 -- compilation. Even when the configurations match, this message 3179 -- may be issued on correct code, because pragma Pack is ignored 3180 -- in CodePeer mode. 3181 3182 if CodePeer_Mode then 3183 return True; 3184 3185 -- When a size is wrong for a frozen type there is no explicit size 3186 -- clause, and other errors have occurred, suppress the message, 3187 -- since it is likely that this size error is a cascaded result of 3188 -- other errors. The reason we eliminate unfrozen types is that 3189 -- messages issued before the freeze type are for sure OK. 3190 3191 elsif Is_Frozen (E) 3192 and then Serious_Errors_Detected > 0 3193 and then Nkind (N) /= N_Component_Clause 3194 and then Nkind (Parent (N)) /= N_Component_Clause 3195 and then 3196 No (Get_Attribute_Definition_Clause (E, Attribute_Size)) 3197 and then 3198 No (Get_Attribute_Definition_Clause (E, Attribute_Object_Size)) 3199 and then 3200 No (Get_Attribute_Definition_Clause (E, Attribute_Value_Size)) 3201 then 3202 return True; 3203 end if; 3204 end if; 3205 3206 -- All special tests complete, so go ahead with message 3207 3208 return False; 3209 end Special_Msg_Delete; 3210 3211 ----------------- 3212 -- SPARK_Msg_N -- 3213 ----------------- 3214 3215 procedure SPARK_Msg_N (Msg : String; N : Node_Or_Entity_Id) is 3216 begin 3217 if SPARK_Mode /= Off then 3218 Error_Msg_N (Msg, N); 3219 end if; 3220 end SPARK_Msg_N; 3221 3222 ------------------ 3223 -- SPARK_Msg_NE -- 3224 ------------------ 3225 3226 procedure SPARK_Msg_NE 3227 (Msg : String; 3228 N : Node_Or_Entity_Id; 3229 E : Node_Or_Entity_Id) 3230 is 3231 begin 3232 if SPARK_Mode /= Off then 3233 Error_Msg_NE (Msg, N, E); 3234 end if; 3235 end SPARK_Msg_NE; 3236 3237 -------------------------- 3238 -- Unwind_Internal_Type -- 3239 -------------------------- 3240 3241 procedure Unwind_Internal_Type (Ent : in out Entity_Id) is 3242 Derived : Boolean := False; 3243 Mchar : Character; 3244 Old_Ent : Entity_Id; 3245 3246 begin 3247 -- Undo placement of a quote, since we will put it back later 3248 3249 Mchar := Msg_Buffer (Msglen); 3250 3251 if Mchar = '"' then 3252 Msglen := Msglen - 1; 3253 end if; 3254 3255 -- The loop here deals with recursive types, we are trying to find a 3256 -- related entity that is not an implicit type. Note that the check with 3257 -- Old_Ent stops us from getting "stuck". Also, we don't output the 3258 -- "type derived from" message more than once in the case where we climb 3259 -- up multiple levels. 3260 3261 Find : loop 3262 Old_Ent := Ent; 3263 3264 -- Implicit access type, use directly designated type In Ada 2005, 3265 -- the designated type may be an anonymous access to subprogram, in 3266 -- which case we can only point to its definition. 3267 3268 if Is_Access_Type (Ent) then 3269 if Ekind (Ent) = E_Access_Subprogram_Type 3270 or else Ekind (Ent) = E_Anonymous_Access_Subprogram_Type 3271 or else Is_Access_Protected_Subprogram_Type (Ent) 3272 then 3273 Ent := Directly_Designated_Type (Ent); 3274 3275 if not Comes_From_Source (Ent) then 3276 if Buffer_Ends_With ("type ") then 3277 Buffer_Remove ("type "); 3278 end if; 3279 end if; 3280 3281 if Ekind (Ent) = E_Function then 3282 Set_Msg_Str ("access to function "); 3283 elsif Ekind (Ent) = E_Procedure then 3284 Set_Msg_Str ("access to procedure "); 3285 else 3286 Set_Msg_Str ("access to subprogram"); 3287 end if; 3288 3289 exit Find; 3290 3291 -- Type is access to object, named or anonymous 3292 3293 else 3294 Set_Msg_Str ("access to "); 3295 Ent := Directly_Designated_Type (Ent); 3296 end if; 3297 3298 -- Classwide type 3299 3300 elsif Is_Class_Wide_Type (Ent) then 3301 Class_Flag := True; 3302 Ent := Root_Type (Ent); 3303 3304 -- Use base type if this is a subtype 3305 3306 elsif Ent /= Base_Type (Ent) then 3307 Buffer_Remove ("type "); 3308 3309 -- Avoid duplication "subtype of subtype of", and also replace 3310 -- "derived from subtype of" simply by "derived from" 3311 3312 if not Buffer_Ends_With ("subtype of ") 3313 and then not Buffer_Ends_With ("derived from ") 3314 then 3315 Set_Msg_Str ("subtype of "); 3316 end if; 3317 3318 Ent := Base_Type (Ent); 3319 3320 -- If this is a base type with a first named subtype, use the first 3321 -- named subtype instead. This is not quite accurate in all cases, 3322 -- but it makes too much noise to be accurate and add 'Base in all 3323 -- cases. Note that we only do this is the first named subtype is not 3324 -- itself an internal name. This avoids the obvious loop (subtype -> 3325 -- basetype -> subtype) which would otherwise occur). 3326 3327 else 3328 declare 3329 FST : constant Entity_Id := First_Subtype (Ent); 3330 3331 begin 3332 if not Is_Internal_Name (Chars (FST)) then 3333 Ent := FST; 3334 exit Find; 3335 3336 -- Otherwise use root type 3337 3338 else 3339 if not Derived then 3340 Buffer_Remove ("type "); 3341 3342 -- Test for "subtype of type derived from" which seems 3343 -- excessive and is replaced by "type derived from". 3344 3345 Buffer_Remove ("subtype of"); 3346 3347 -- Avoid duplicated "type derived from type derived from" 3348 3349 if not Buffer_Ends_With ("type derived from ") then 3350 Set_Msg_Str ("type derived from "); 3351 end if; 3352 3353 Derived := True; 3354 end if; 3355 end if; 3356 end; 3357 3358 Ent := Etype (Ent); 3359 end if; 3360 3361 -- If we are stuck in a loop, get out and settle for the internal 3362 -- name after all. In this case we set to kill the message if it is 3363 -- not the first error message (we really try hard not to show the 3364 -- dirty laundry of the implementation to the poor user). 3365 3366 if Ent = Old_Ent then 3367 Kill_Message := True; 3368 exit Find; 3369 end if; 3370 3371 -- Get out if we finally found a non-internal name to use 3372 3373 exit Find when not Is_Internal_Name (Chars (Ent)); 3374 end loop Find; 3375 3376 if Mchar = '"' then 3377 Set_Msg_Char ('"'); 3378 end if; 3379 end Unwind_Internal_Type; 3380 3381 -------------------- 3382 -- Warn_Insertion -- 3383 -------------------- 3384 3385 function Warn_Insertion return String is 3386 begin 3387 case Warning_Msg_Char is 3388 when '?' => 3389 return "??"; 3390 when 'a' .. 'z' | 'A' .. 'Z' | '*' | '$' => 3391 return '?' & Warning_Msg_Char & '?'; 3392 when ' ' => 3393 return "?"; 3394 when others => 3395 raise Program_Error; 3396 end case; 3397 end Warn_Insertion; 3398 3399end Errout; 3400