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------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- E R R O U T -- -- -- -- B o d y -- -- -- -- Copyright (C) 1992-2005, Free Software Foundation, Inc. -- -- -- -- GNAT is free software; you can redistribute it and/or modify it under -- -- terms of the GNU General Public License as published by the Free Soft- -- -- ware Foundation; either version 2, or (at your option) any later ver- -- -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- -- for more details. You should have received a copy of the GNU General -- -- Public License distributed with GNAT; see file COPYING. If not, write -- -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, -- -- Boston, MA 02110-1301, USA. -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ -- Warning! Error messages can be generated during Gigi processing by direct -- calls to error message routines, so it is essential that the processing -- in this body be consistent with the requirements for the Gigi processing -- environment, and that in particular, no disallowed table expansion is -- allowed to occur. with Atree; use Atree; with Casing; use Casing; with Csets; use Csets; with Debug; use Debug; with Einfo; use Einfo; with Erroutc; use Erroutc; with Fname; use Fname; with Hostparm; use Hostparm; with Lib; use Lib; with Namet; use Namet; with Opt; use Opt; with Nlists; use Nlists; with Output; use Output; with Scans; use Scans; with Sinput; use Sinput; with Sinfo; use Sinfo; with Snames; use Snames; with Stand; use Stand; with Style; with Uname; use Uname; with Unchecked_Conversion; package body Errout is Errors_Must_Be_Ignored : Boolean := False; -- Set to True by procedure Set_Ignore_Errors (True), when calls to -- error message procedures should be ignored (when parsing irrelevant -- text in sources being preprocessed). Warn_On_Instance : Boolean; -- Flag set true for warning message to be posted on instance ------------------------------------ -- Table of Non-Instance Messages -- ------------------------------------ -- This table contains an entry for every error message processed by the -- Error_Msg routine that is not posted on generic (or inlined) instance. -- As explained in further detail in the Error_Msg procedure body, this -- table is used to avoid posting redundant messages on instances. type NIM_Record is record Msg : String_Ptr; Loc : Source_Ptr; end record; -- Type used to store text and location of one message package Non_Instance_Msgs is new Table.Table ( Table_Component_Type => NIM_Record, Table_Index_Type => Int, Table_Low_Bound => 1, Table_Initial => 100, Table_Increment => 100, Table_Name => "Non_Instance_Msgs"); ----------------------- -- Local Subprograms -- ----------------------- procedure Error_Msg_Internal (Msg : String; Sptr : Source_Ptr; Optr : Source_Ptr; Msg_Cont : Boolean); -- This is the low level routine used to post messages after dealing with -- the issue of messages placed on instantiations (which get broken up -- into separate calls in Error_Msg). Sptr is the location on which the -- flag will be placed in the output. In the case where the flag is on -- the template, this points directly to the template, not to one of the -- instantiation copies of the template. Optr is the original location -- used to flag the error, and this may indeed point to an instantiation -- copy. So typically we can see Optr pointing to the template location -- in an instantiation copy when Sptr points to the source location of -- the actual instantiation (i.e the line with the new). Msg_Cont is -- set true if this is a continuation message. function No_Warnings (N : Node_Or_Entity_Id) return Boolean; -- Determines if warnings should be suppressed for the given node function OK_Node (N : Node_Id) return Boolean; -- Determines if a node is an OK node to place an error message on (return -- True) or if the error message should be suppressed (return False). A -- message is suppressed if the node already has an error posted on it, -- or if it refers to an Etype that has an error posted on it, or if -- it references an Entity that has an error posted on it. procedure Output_Source_Line (L : Physical_Line_Number; Sfile : Source_File_Index; Errs : Boolean); -- Outputs text of source line L, in file S, together with preceding line -- number, as described above for Output_Line_Number. The Errs parameter -- indicates if there are errors attached to the line, which forces -- listing on, even in the presence of pragma List (Off). procedure Set_Msg_Insertion_Column; -- Handle column number insertion (@ insertion character) procedure Set_Msg_Insertion_Node; -- Handle node (name from node) insertion (& insertion character) procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr); -- Handle type reference (right brace insertion character). Flag is the -- location of the flag, which is provided for the internal call to -- Set_Msg_Insertion_Line_Number, procedure Set_Msg_Insertion_Unit_Name; -- Handle unit name insertion ($ insertion character) procedure Set_Msg_Node (Node : Node_Id); -- Add the sequence of characters for the name associated with the -- given node to the current message. procedure Set_Msg_Text (Text : String; Flag : Source_Ptr); -- Add a sequence of characters to the current message. The characters may -- be one of the special insertion characters (see documentation in spec). -- Flag is the location at which the error is to be posted, which is used -- to determine whether or not the # insertion needs a file name. The -- variables Msg_Buffer, Msglen, Is_Style_Msg, Is_Warning_Msg, and -- Is_Unconditional_Msg are set on return. procedure Set_Posted (N : Node_Id); -- Sets the Error_Posted flag on the given node, and all its parents -- that are subexpressions and then on the parent non-subexpression -- construct that contains the original expression (this reduces the -- number of cascaded messages). Note that this call only has an effect -- for a serious error. For a non-serious error, it has no effect. procedure Set_Qualification (N : Nat; E : Entity_Id); -- Outputs up to N levels of qualification for the given entity. For -- example, the entity A.B.C.D will output B.C. if N = 2. function Special_Msg_Delete (Msg : String; N : Node_Or_Entity_Id; E : Node_Or_Entity_Id) return Boolean; -- This function is called from Error_Msg_NEL, passing the message Msg, -- node N on which the error is to be posted, and the entity or node E -- to be used for an & insertion in the message if any. The job of this -- procedure is to test for certain cascaded messages that we would like -- to suppress. If the message is to be suppressed then we return True. -- If the message should be generated (the normal case) False is returned. procedure Unwind_Internal_Type (Ent : in out Entity_Id); -- This procedure is given an entity id for an internal type, i.e. -- a type with an internal name. It unwinds the type to try to get -- to something reasonably printable, generating prefixes like -- "subtype of", "access to", etc along the way in the buffer. The -- value in Ent on return is the final name to be printed. Hopefully -- this is not an internal name, but in some internal name cases, it -- is an internal name, and has to be printed anyway (although in this -- case the message has been killed if possible). The global variable -- Class_Flag is set to True if the resulting entity should have -- 'Class appended to its name (see Add_Class procedure), and is -- otherwise unchanged. procedure VMS_Convert; -- This procedure has no effect if called when the host is not OpenVMS. -- If the host is indeed OpenVMS, then the error message stored in -- Msg_Buffer is scanned for appearences of switch names which need -- converting to corresponding VMS qualifer names. See Gnames/Vnames -- table in Errout spec for precise definition of the conversion that -- is performed by this routine in OpenVMS mode. ----------------------- -- Change_Error_Text -- ----------------------- procedure Change_Error_Text (Error_Id : Error_Msg_Id; New_Msg : String) is Save_Next : Error_Msg_Id; Err_Id : Error_Msg_Id := Error_Id; begin Set_Msg_Text (New_Msg, Errors.Table (Error_Id).Sptr); Errors.Table (Error_Id).Text := new String'(Msg_Buffer (1 .. Msglen)); -- If in immediate error message mode, output modified error message now -- This is just a bit tricky, because we want to output just a single -- message, and the messages we modified is already linked in. We solve -- this by temporarily resetting its forward pointer to empty. if Debug_Flag_OO then Save_Next := Errors.Table (Error_Id).Next; Errors.Table (Error_Id).Next := No_Error_Msg; Write_Eol; Output_Source_Line (Errors.Table (Error_Id).Line, Errors.Table (Error_Id).Sfile, True); Output_Error_Msgs (Err_Id); Errors.Table (Error_Id).Next := Save_Next; end if; end Change_Error_Text; --------------- -- Error_Msg -- --------------- -- Error_Msg posts a flag at the given location, except that if the -- Flag_Location points within a generic template and corresponds -- to an instantiation of this generic template, then the actual -- message will be posted on the generic instantiation, along with -- additional messages referencing the generic declaration. procedure Error_Msg (Msg : String; Flag_Location : Source_Ptr) is Sindex : Source_File_Index; -- Source index for flag location Orig_Loc : Source_Ptr; -- Original location of Flag_Location (i.e. location in original -- template in instantiation case, otherwise unchanged). begin -- It is a fatal error to issue an error message when scanning from -- the internal source buffer (see Sinput for further documentation) pragma Assert (Sinput.Source /= Internal_Source_Ptr); -- Return if all errors are to be ignored if Errors_Must_Be_Ignored then return; end if; -- If we already have messages, and we are trying to place a message -- at No_Location or in package Standard, then just ignore the attempt -- since we assume that what is happening is some cascaded junk. Note -- that this is safe in the sense that proceeding will surely bomb. if Flag_Location < First_Source_Ptr and then Total_Errors_Detected > 0 then return; end if; -- Start procesing of new message Sindex := Get_Source_File_Index (Flag_Location); Test_Style_Warning_Serious_Msg (Msg); Orig_Loc := Original_Location (Flag_Location); -- If the current location is in an instantiation, the issue arises -- of whether to post the message on the template or the instantiation. -- The way we decide is to see if we have posted the same message -- on the template when we compiled the template (the template is -- always compiled before any instantiations). For this purpose, -- we use a separate table of messages. The reason we do this is -- twofold: -- First, the messages can get changed by various processing -- including the insertion of tokens etc, making it hard to -- do the comparison. -- Second, we will suppress a warning on a template if it is -- not in the current extended source unit. That's reasonable -- and means we don't want the warning on the instantiation -- here either, but it does mean that the main error table -- would not in any case include the message. if Flag_Location = Orig_Loc then Non_Instance_Msgs.Append ((new String'(Msg), Flag_Location)); Warn_On_Instance := False; -- Here we have an instance message else -- Delete if debug flag off, and this message duplicates a -- message already posted on the corresponding template if not Debug_Flag_GG then for J in Non_Instance_Msgs.First .. Non_Instance_Msgs.Last loop if Msg = Non_Instance_Msgs.Table (J).Msg.all and then Non_Instance_Msgs.Table (J).Loc = Orig_Loc then return; end if; end loop; end if; -- No duplicate, so error/warning will be posted on instance Warn_On_Instance := Is_Warning_Msg; end if; -- Ignore warning message that is suppressed. Note that style -- checks are not considered warning messages for this purpose if Is_Warning_Msg and then Warnings_Suppressed (Orig_Loc) then return; end if; -- The idea at this stage is that we have two kinds of messages -- First, we have those messages that are to be placed as requested at -- Flag_Location. This includes messages that have nothing to do with -- generics, and also messages placed on generic templates that reflect -- an error in the template itself. For such messages we simply call -- Error_Msg_Internal to place the message in the requested location. if Instantiation (Sindex) = No_Location then Error_Msg_Internal (Msg, Flag_Location, Flag_Location, False); return; end if; -- If we are trying to flag an error in an instantiation, we may have -- a generic contract violation. What we generate in this case is: -- instantiation error at ... -- original error message -- or -- warning: in instantiation at -- warning: original warning message -- All these messages are posted at the location of the top level -- instantiation. If there are nested instantiations, then the -- instantiation error message can be repeated, pointing to each -- of the relevant instantiations. -- Note: the instantiation mechanism is also shared for inlining -- of subprogram bodies when front end inlining is done. In this -- case the messages have the form: -- in inlined body at ... -- original error message -- or -- warning: in inlined body at -- warning: original warning message -- OK, this is the case where we have an instantiation error, and -- we need to generate the error on the instantiation, rather than -- on the template. declare Actual_Error_Loc : Source_Ptr; -- Location of outer level instantiation in instantiation case, or -- just a copy of Flag_Location in the normal case. This is the -- location where all error messages will actually be posted. Save_Error_Msg_Sloc : constant Source_Ptr := Error_Msg_Sloc; -- Save possible location set for caller's message. We need to -- use Error_Msg_Sloc for the location of the instantiation error -- but we have to preserve a possible original value. X : Source_File_Index; Msg_Cont_Status : Boolean; -- Used to label continuation lines in instantiation case with -- proper Msg_Cont status. begin -- Loop to find highest level instantiation, where all error -- messages will be placed. X := Sindex; loop Actual_Error_Loc := Instantiation (X); X := Get_Source_File_Index (Actual_Error_Loc); exit when Instantiation (X) = No_Location; end loop; -- Since we are generating the messages at the instantiation -- point in any case, we do not want the references to the -- bad lines in the instance to be annotated with the location -- of the instantiation. Suppress_Instance_Location := True; Msg_Cont_Status := False; -- Loop to generate instantiation messages Error_Msg_Sloc := Flag_Location; X := Get_Source_File_Index (Flag_Location); while Instantiation (X) /= No_Location loop -- Suppress instantiation message on continuation lines if Msg (Msg'First) /= '\' then -- Case of inlined body if Inlined_Body (X) then if Is_Warning_Msg then Error_Msg_Internal ("?in inlined body #", Actual_Error_Loc, Flag_Location, Msg_Cont_Status); else Error_Msg_Internal ("error in inlined body #", Actual_Error_Loc, Flag_Location, Msg_Cont_Status); end if; -- Case of generic instantiation else if Is_Warning_Msg then Error_Msg_Internal ("?in instantiation #", Actual_Error_Loc, Flag_Location, Msg_Cont_Status); else Error_Msg_Internal ("instantiation error #", Actual_Error_Loc, Flag_Location, Msg_Cont_Status); end if; end if; end if; Error_Msg_Sloc := Instantiation (X); X := Get_Source_File_Index (Error_Msg_Sloc); Msg_Cont_Status := True; end loop; Suppress_Instance_Location := False; Error_Msg_Sloc := Save_Error_Msg_Sloc; -- Here we output the original message on the outer instantiation Error_Msg_Internal (Msg, Actual_Error_Loc, Flag_Location, Msg_Cont_Status); end; end Error_Msg; ------------------ -- Error_Msg_AP -- ------------------ procedure Error_Msg_AP (Msg : String) is S1 : Source_Ptr; C : Character; begin -- If we had saved the Scan_Ptr value after scanning the previous -- token, then we would have exactly the right place for putting -- the flag immediately at hand. However, that would add at least -- two instructions to a Scan call *just* to service the possibility -- of an Error_Msg_AP call. So instead we reconstruct that value. -- We have two possibilities, start with Prev_Token_Ptr and skip over -- the current token, which is made harder by the possibility that this -- token may be in error, or start with Token_Ptr and work backwards. -- We used to take the second approach, but it's hard because of -- comments, and harder still because things that look like comments -- can appear inside strings. So now we take the first approach. -- Note: in the case where there is no previous token, Prev_Token_Ptr -- is set to Source_First, which is a reasonable position for the -- error flag in this situation. S1 := Prev_Token_Ptr; C := Source (S1); -- If the previous token is a string literal, we need a special approach -- since there may be white space inside the literal and we don't want -- to stop on that white space. -- Note: since this is an error recovery issue anyway, it is not worth -- worrying about special UTF_32 line terminator characters here. if Prev_Token = Tok_String_Literal then loop S1 := S1 + 1; if Source (S1) = C then S1 := S1 + 1; exit when Source (S1) /= C; elsif Source (S1) in Line_Terminator then exit; end if; end loop; -- Character literal also needs special handling elsif Prev_Token = Tok_Char_Literal then S1 := S1 + 3; -- Otherwise we search forward for the end of the current token, marked -- by a line terminator, white space, a comment symbol or if we bump -- into the following token (i.e. the current token). -- Again, it is not worth worrying about UTF_32 special line terminator -- characters in this context, since this is only for error recovery. else while Source (S1) not in Line_Terminator and then Source (S1) /= ' ' and then Source (S1) /= ASCII.HT and then (Source (S1) /= '-' or else Source (S1 + 1) /= '-') and then S1 /= Token_Ptr loop S1 := S1 + 1; end loop; end if; -- S1 is now set to the location for the flag Error_Msg (Msg, S1); end Error_Msg_AP; ------------------ -- Error_Msg_BC -- ------------------ procedure Error_Msg_BC (Msg : String) is begin -- If we are at end of file, post the flag after the previous token if Token = Tok_EOF then Error_Msg_AP (Msg); -- If we are at start of file, post the flag at the current token elsif Token_Ptr = Source_First (Current_Source_File) then Error_Msg_SC (Msg); -- If the character before the current token is a space or a horizontal -- tab, then we place the flag on this character (in the case of a tab -- we would really like to place it in the "last" character of the tab -- space, but that it too much trouble to worry about). elsif Source (Token_Ptr - 1) = ' ' or else Source (Token_Ptr - 1) = ASCII.HT then Error_Msg (Msg, Token_Ptr - 1); -- If there is no space or tab before the current token, then there is -- no room to place the flag before the token, so we place it on the -- token instead (this happens for example at the start of a line). else Error_Msg (Msg, Token_Ptr); end if; end Error_Msg_BC; ------------------- -- Error_Msg_CRT -- ------------------- procedure Error_Msg_CRT (Feature : String; N : Node_Id) is CNRT : constant String := " not allowed in no run time mode"; CCRT : constant String := " not supported by configuration>"; S : String (1 .. Feature'Length + 1 + CCRT'Length); L : Natural; begin S (1) := '|'; S (2 .. Feature'Length + 1) := Feature; L := Feature'Length + 2; if No_Run_Time_Mode then S (L .. L + CNRT'Length - 1) := CNRT; L := L + CNRT'Length - 1; else pragma Assert (Configurable_Run_Time_Mode); S (L .. L + CCRT'Length - 1) := CCRT; L := L + CCRT'Length - 1; end if; Error_Msg_N (S (1 .. L), N); Configurable_Run_Time_Violations := Configurable_Run_Time_Violations + 1; end Error_Msg_CRT; ----------------- -- Error_Msg_F -- ----------------- procedure Error_Msg_F (Msg : String; N : Node_Id) is begin Error_Msg_NEL (Msg, N, N, Sloc (First_Node (N))); end Error_Msg_F; ------------------ -- Error_Msg_FE -- ------------------ procedure Error_Msg_FE (Msg : String; N : Node_Id; E : Node_Or_Entity_Id) is begin Error_Msg_NEL (Msg, N, E, Sloc (First_Node (N))); end Error_Msg_FE; ------------------------ -- Error_Msg_Internal -- ------------------------ procedure Error_Msg_Internal (Msg : String; Sptr : Source_Ptr; Optr : Source_Ptr; Msg_Cont : Boolean) is Next_Msg : Error_Msg_Id; -- Pointer to next message at insertion point Prev_Msg : Error_Msg_Id; -- Pointer to previous message at insertion point Temp_Msg : Error_Msg_Id; procedure Handle_Serious_Error; -- Internal procedure to do all error message handling for a serious -- error message, other than bumping the error counts and arranging -- for the message to be output. -------------------------- -- Handle_Serious_Error -- -------------------------- procedure Handle_Serious_Error is begin -- Turn off code generation if not done already if Operating_Mode = Generate_Code then Operating_Mode := Check_Semantics; Expander_Active := False; end if; -- Set the fatal error flag in the unit table unless we are -- in Try_Semantics mode. This stops the semantics from being -- performed if we find a serious error. This is skipped if we -- are currently dealing with the configuration pragma file. if not Try_Semantics and then Current_Source_Unit /= No_Unit then Set_Fatal_Error (Get_Source_Unit (Sptr)); end if; end Handle_Serious_Error; -- Start of processing for Error_Msg_Internal begin if Raise_Exception_On_Error /= 0 then raise Error_Msg_Exception; end if; Continuation := Msg_Cont; Suppress_Message := False; Kill_Message := False; Set_Msg_Text (Msg, Sptr); -- Kill continuation if parent message killed if Continuation and Last_Killed then return; end if; -- Return without doing anything if message is suppressed if Suppress_Message and not All_Errors_Mode and not (Msg (Msg'Last) = '!') then if not Continuation then Last_Killed := True; end if; return; end if; -- Return without doing anything if message is killed and this -- is not the first error message. The philosophy is that if we -- get a weird error message and we already have had a message, -- then we hope the weird message is a junk cascaded message if Kill_Message and then not All_Errors_Mode and then Total_Errors_Detected /= 0 then if not Continuation then Last_Killed := True; end if; return; end if; -- Special check for warning message to see if it should be output if Is_Warning_Msg then -- Immediate return if warning message and warnings are suppressed if Warnings_Suppressed (Optr) or else Warnings_Suppressed (Sptr) then Cur_Msg := No_Error_Msg; return; end if; -- If the flag location is in the main extended source unit -- then for sure we want the warning since it definitely belongs if In_Extended_Main_Source_Unit (Sptr) then null; -- If the flag location is not in the main extended source -- unit then we want to eliminate the warning. elsif In_Extended_Main_Code_Unit (Sptr) and then Warn_On_Instance then null; -- Keep warning if debug flag G set elsif Debug_Flag_GG then null; -- Here is where we delete a warning from a with'ed unit else Cur_Msg := No_Error_Msg; return; end if; end if; -- If message is to be ignored in special ignore message mode, this is -- where we do this special processing, bypassing message output. if Ignore_Errors_Enable > 0 then if Is_Serious_Error then Handle_Serious_Error; end if; return; end if; -- Otherwise build error message object for new message Errors.Increment_Last; Cur_Msg := Errors.Last; Errors.Table (Cur_Msg).Text := new String'(Msg_Buffer (1 .. Msglen)); Errors.Table (Cur_Msg).Next := No_Error_Msg; Errors.Table (Cur_Msg).Sptr := Sptr; Errors.Table (Cur_Msg).Optr := Optr; Errors.Table (Cur_Msg).Sfile := Get_Source_File_Index (Sptr); Errors.Table (Cur_Msg).Line := Get_Physical_Line_Number (Sptr); Errors.Table (Cur_Msg).Col := Get_Column_Number (Sptr); Errors.Table (Cur_Msg).Warn := Is_Warning_Msg; Errors.Table (Cur_Msg).Style := Is_Style_Msg; Errors.Table (Cur_Msg).Serious := Is_Serious_Error; Errors.Table (Cur_Msg).Uncond := Is_Unconditional_Msg; Errors.Table (Cur_Msg).Msg_Cont := Continuation; Errors.Table (Cur_Msg).Deleted := False; -- If immediate errors mode set, output error message now. Also output -- now if the -d1 debug flag is set (so node number message comes out -- just before actual error message) if Debug_Flag_OO or else Debug_Flag_1 then Write_Eol; Output_Source_Line (Errors.Table (Cur_Msg).Line, Errors.Table (Cur_Msg).Sfile, True); Temp_Msg := Cur_Msg; Output_Error_Msgs (Temp_Msg); -- If not in immediate errors mode, then we insert the message in the -- error chain for later output by Finalize. The messages are sorted -- first by unit (main unit comes first), and within a unit by source -- location (earlier flag location first in the chain). else -- First a quick check, does this belong at the very end of the -- chain of error messages. This saves a lot of time in the -- normal case if there are lots of messages. if Last_Error_Msg /= No_Error_Msg and then Errors.Table (Cur_Msg).Sfile = Errors.Table (Last_Error_Msg).Sfile and then (Sptr > Errors.Table (Last_Error_Msg).Sptr or else (Sptr = Errors.Table (Last_Error_Msg).Sptr and then Optr > Errors.Table (Last_Error_Msg).Optr)) then Prev_Msg := Last_Error_Msg; Next_Msg := No_Error_Msg; -- Otherwise do a full sequential search for the insertion point else Prev_Msg := No_Error_Msg; Next_Msg := First_Error_Msg; while Next_Msg /= No_Error_Msg loop exit when Errors.Table (Cur_Msg).Sfile < Errors.Table (Next_Msg).Sfile; if Errors.Table (Cur_Msg).Sfile = Errors.Table (Next_Msg).Sfile then exit when Sptr < Errors.Table (Next_Msg).Sptr or else (Sptr = Errors.Table (Next_Msg).Sptr and then Optr < Errors.Table (Next_Msg).Optr); end if; Prev_Msg := Next_Msg; Next_Msg := Errors.Table (Next_Msg).Next; end loop; end if; -- Now we insert the new message in the error chain. The insertion -- point for the message is after Prev_Msg and before Next_Msg. -- The possible insertion point for the new message is after Prev_Msg -- and before Next_Msg. However, this is where we do a special check -- for redundant parsing messages, defined as messages posted on the -- same line. The idea here is that probably such messages are junk -- from the parser recovering. In full errors mode, we don't do this -- deletion, but otherwise such messages are discarded at this stage. if Prev_Msg /= No_Error_Msg and then Errors.Table (Prev_Msg).Line = Errors.Table (Cur_Msg).Line and then Errors.Table (Prev_Msg).Sfile = Errors.Table (Cur_Msg).Sfile and then Compiler_State = Parsing and then not All_Errors_Mode then -- Don't delete unconditional messages and at this stage, -- don't delete continuation lines (we attempted to delete -- those earlier if the parent message was deleted. if not Errors.Table (Cur_Msg).Uncond and then not Continuation then -- Don't delete if prev msg is warning and new msg is -- an error. This is because we don't want a real error -- masked by a warning. In all other cases (that is parse -- errors for the same line that are not unconditional) -- we do delete the message. This helps to avoid -- junk extra messages from cascaded parsing errors if not (Errors.Table (Prev_Msg).Warn or Errors.Table (Prev_Msg).Style) or else (Errors.Table (Cur_Msg).Warn or Errors.Table (Cur_Msg).Style) then -- All tests passed, delete the message by simply -- returning without any further processing. if not Continuation then Last_Killed := True; end if; return; end if; end if; end if; -- Come here if message is to be inserted in the error chain if not Continuation then Last_Killed := False; end if; if Prev_Msg = No_Error_Msg then First_Error_Msg := Cur_Msg; else Errors.Table (Prev_Msg).Next := Cur_Msg; end if; Errors.Table (Cur_Msg).Next := Next_Msg; if Next_Msg = No_Error_Msg then Last_Error_Msg := Cur_Msg; end if; end if; -- Bump appropriate statistics count if Errors.Table (Cur_Msg).Warn or else Errors.Table (Cur_Msg).Style then Warnings_Detected := Warnings_Detected + 1; else Total_Errors_Detected := Total_Errors_Detected + 1; if Errors.Table (Cur_Msg).Serious then Serious_Errors_Detected := Serious_Errors_Detected + 1; Handle_Serious_Error; end if; end if; -- Terminate if max errors reached if Total_Errors_Detected + Warnings_Detected = Maximum_Errors then raise Unrecoverable_Error; end if; end Error_Msg_Internal; ----------------- -- Error_Msg_N -- ----------------- procedure Error_Msg_N (Msg : String; N : Node_Or_Entity_Id) is begin Error_Msg_NEL (Msg, N, N, Sloc (N)); end Error_Msg_N; ------------------ -- Error_Msg_NE -- ------------------ procedure Error_Msg_NE (Msg : String; N : Node_Or_Entity_Id; E : Node_Or_Entity_Id) is begin Error_Msg_NEL (Msg, N, E, Sloc (N)); end Error_Msg_NE; ------------------- -- Error_Msg_NEL -- ------------------- procedure Error_Msg_NEL (Msg : String; N : Node_Or_Entity_Id; E : Node_Or_Entity_Id; Flag_Location : Source_Ptr) is begin if Special_Msg_Delete (Msg, N, E) then return; end if; Test_Style_Warning_Serious_Msg (Msg); -- Special handling for warning messages if Is_Warning_Msg then -- Suppress if no warnings set for either entity or node if No_Warnings (N) or else No_Warnings (E) then return; end if; -- Suppress if inside loop that is known to be null declare P : Node_Id; begin P := Parent (N); while Present (P) loop if Nkind (P) = N_Loop_Statement and then Is_Null_Loop (P) then return; end if; P := Parent (P); end loop; end; end if; -- Test for message to be output if All_Errors_Mode or else Msg (Msg'Last) = '!' or else OK_Node (N) or else (Msg (Msg'First) = '\' and not Last_Killed) then Debug_Output (N); Error_Msg_Node_1 := E; Error_Msg (Msg, Flag_Location); else Last_Killed := True; end if; if not Is_Warning_Msg and then not Is_Style_Msg then Set_Posted (N); end if; end Error_Msg_NEL; ------------------ -- Error_Msg_NW -- ------------------ procedure Error_Msg_NW (Eflag : Boolean; Msg : String; N : Node_Or_Entity_Id) is begin if Eflag and then In_Extended_Main_Source_Unit (N) and then Comes_From_Source (N) then Error_Msg_NEL (Msg, N, N, Sloc (N)); end if; end Error_Msg_NW; ----------------- -- Error_Msg_S -- ----------------- procedure Error_Msg_S (Msg : String) is begin Error_Msg (Msg, Scan_Ptr); end Error_Msg_S; ------------------ -- Error_Msg_SC -- ------------------ procedure Error_Msg_SC (Msg : String) is begin -- If we are at end of file, post the flag after the previous token if Token = Tok_EOF then Error_Msg_AP (Msg); -- For all other cases the message is posted at the current token -- pointer position else Error_Msg (Msg, Token_Ptr); end if; end Error_Msg_SC; ------------------ -- Error_Msg_SP -- ------------------ procedure Error_Msg_SP (Msg : String) is begin -- Note: in the case where there is no previous token, Prev_Token_Ptr -- is set to Source_First, which is a reasonable position for the -- error flag in this situation Error_Msg (Msg, Prev_Token_Ptr); end Error_Msg_SP; -------------- -- Finalize -- -------------- procedure Finalize is Cur : Error_Msg_Id; Nxt : Error_Msg_Id; E, F : Error_Msg_Id; Err_Flag : Boolean; begin -- Reset current error source file if the main unit has a pragma -- Source_Reference. This ensures outputting the proper name of -- the source file in this situation. if Main_Source_File = No_Source_File or else Num_SRef_Pragmas (Main_Source_File) /= 0 then Current_Error_Source_File := No_Source_File; end if; -- Eliminate any duplicated error messages from the list. This is -- done after the fact to avoid problems with Change_Error_Text. Cur := First_Error_Msg; while Cur /= No_Error_Msg loop Nxt := Errors.Table (Cur).Next; F := Nxt; while F /= No_Error_Msg and then Errors.Table (F).Sptr = Errors.Table (Cur).Sptr loop Check_Duplicate_Message (Cur, F); F := Errors.Table (F).Next; end loop; Cur := Nxt; end loop; -- Brief Error mode if Brief_Output or (not Full_List and not Verbose_Mode) then Set_Standard_Error; E := First_Error_Msg; while E /= No_Error_Msg loop if not Errors.Table (E).Deleted and then not Debug_Flag_KK then if Full_Path_Name_For_Brief_Errors then Write_Name (Full_Ref_Name (Errors.Table (E).Sfile)); else Write_Name (Reference_Name (Errors.Table (E).Sfile)); end if; Write_Char (':'); Write_Int (Int (Physical_To_Logical (Errors.Table (E).Line, Errors.Table (E).Sfile))); Write_Char (':'); if Errors.Table (E).Col < 10 then Write_Char ('0'); end if; Write_Int (Int (Errors.Table (E).Col)); Write_Str (": "); Output_Msg_Text (E); Write_Eol; end if; E := Errors.Table (E).Next; end loop; Set_Standard_Output; end if; -- Full source listing case if Full_List then List_Pragmas_Index := 1; List_Pragmas_Mode := True; E := First_Error_Msg; Write_Eol; -- First list initial main source file with its error messages for N in 1 .. Last_Source_Line (Main_Source_File) loop Err_Flag := E /= No_Error_Msg and then Errors.Table (E).Line = N and then Errors.Table (E).Sfile = Main_Source_File; Output_Source_Line (N, Main_Source_File, Err_Flag); if Err_Flag then Output_Error_Msgs (E); if not Debug_Flag_2 then Write_Eol; end if; end if; end loop; -- Then output errors, if any, for subsidiary units while E /= No_Error_Msg and then Errors.Table (E).Sfile /= Main_Source_File loop Write_Eol; Output_Source_Line (Errors.Table (E).Line, Errors.Table (E).Sfile, True); Output_Error_Msgs (E); end loop; end if; -- Verbose mode (error lines only with error flags) if Verbose_Mode and not Full_List then E := First_Error_Msg; -- Loop through error lines while E /= No_Error_Msg loop Write_Eol; Output_Source_Line (Errors.Table (E).Line, Errors.Table (E).Sfile, True); Output_Error_Msgs (E); end loop; end if; -- Output error summary if verbose or full list mode if Verbose_Mode or else Full_List then -- Extra blank line if error messages or source listing were output if Total_Errors_Detected + Warnings_Detected > 0 or else Full_List then Write_Eol; end if; -- Message giving number of lines read and number of errors detected. -- This normally goes to Standard_Output. The exception is when brief -- mode is not set, verbose mode (or full list mode) is set, and -- there are errors. In this case we send the message to standard -- error to make sure that *something* appears on standard error in -- an error situation. -- Formerly, only the "# errors" suffix was sent to stderr, whereas -- "# lines:" appeared on stdout. This caused problems on VMS when -- the stdout buffer was flushed, giving an extra line feed after -- the prefix. if Total_Errors_Detected + Warnings_Detected /= 0 and then not Brief_Output and then (Verbose_Mode or Full_List) then Set_Standard_Error; end if; -- Message giving total number of lines Write_Str (" "); Write_Int (Num_Source_Lines (Main_Source_File)); if Num_Source_Lines (Main_Source_File) = 1 then Write_Str (" line: "); else Write_Str (" lines: "); end if; if Total_Errors_Detected = 0 then Write_Str ("No errors"); elsif Total_Errors_Detected = 1 then Write_Str ("1 error"); else Write_Int (Total_Errors_Detected); Write_Str (" errors"); end if; if Warnings_Detected /= 0 then Write_Str (", "); Write_Int (Warnings_Detected); Write_Str (" warning"); if Warnings_Detected /= 1 then Write_Char ('s'); end if; if Warning_Mode = Treat_As_Error then Write_Str (" (treated as error"); if Warnings_Detected /= 1 then Write_Char ('s'); end if; Write_Char (')'); end if; end if; Write_Eol; Set_Standard_Output; end if; if Maximum_Errors /= 0 and then Total_Errors_Detected + Warnings_Detected = Maximum_Errors then Set_Standard_Error; Write_Str ("fatal error: maximum errors reached"); Write_Eol; Set_Standard_Output; end if; if Warning_Mode = Treat_As_Error then Total_Errors_Detected := Total_Errors_Detected + Warnings_Detected; Warnings_Detected := 0; end if; end Finalize; ---------------- -- First_Node -- ---------------- function First_Node (C : Node_Id) return Node_Id is L : constant Source_Ptr := Sloc (C); Sfile : constant Source_File_Index := Get_Source_File_Index (L); Earliest : Node_Id; Eloc : Source_Ptr; Discard : Traverse_Result; pragma Warnings (Off, Discard); function Test_Earlier (N : Node_Id) return Traverse_Result; -- Function applied to every node in the construct function Search_Tree_First is new Traverse_Func (Test_Earlier); -- Create traversal function ------------------ -- Test_Earlier -- ------------------ function Test_Earlier (N : Node_Id) return Traverse_Result is Loc : constant Source_Ptr := Sloc (N); begin -- Check for earlier. The tests for being in the same file ensures -- against strange cases of foreign code somehow being present. We -- don't want wild placement of messages if that happens, so it is -- best to just ignore this situation. if Loc < Eloc and then Get_Source_File_Index (Loc) = Sfile then Earliest := N; Eloc := Loc; end if; return OK_Orig; end Test_Earlier; -- Start of processing for First_Node begin Earliest := Original_Node (C); Eloc := Sloc (Earliest); Discard := Search_Tree_First (Original_Node (C)); return Earliest; end First_Node; ---------------- -- First_Sloc -- ---------------- function First_Sloc (N : Node_Id) return Source_Ptr is SI : constant Source_File_Index := Source_Index (Get_Source_Unit (N)); SF : constant Source_Ptr := Source_First (SI); F : Node_Id; S : Source_Ptr; begin F := First_Node (N); S := Sloc (F); -- The following circuit is a bit subtle. When we have parenthesized -- expressions, then the Sloc will not record the location of the -- paren, but we would like to post the flag on the paren. So what -- we do is to crawl up the tree from the First_Node, adjusting the -- Sloc value for any parentheses we know are present. Yes, we know -- this circuit is not 100% reliable (e.g. because we don't record -- all possible paren level valoues), but this is only for an error -- message so it is good enough. Node_Loop : loop Paren_Loop : for J in 1 .. Paren_Count (F) loop -- We don't look more than 12 characters behind the current -- location, and in any case not past the front of the source. Search_Loop : for K in 1 .. 12 loop exit Search_Loop when S = SF; if Source_Text (SI) (S - 1) = '(' then S := S - 1; exit Search_Loop; elsif Source_Text (SI) (S - 1) <= ' ' then S := S - 1; else exit Search_Loop; end if; end loop Search_Loop; end loop Paren_Loop; exit Node_Loop when F = N; F := Parent (F); exit Node_Loop when Nkind (F) not in N_Subexpr; end loop Node_Loop; return S; end First_Sloc; ---------------- -- Initialize -- ---------------- procedure Initialize is begin Errors.Init; First_Error_Msg := No_Error_Msg; Last_Error_Msg := No_Error_Msg; Serious_Errors_Detected := 0; Total_Errors_Detected := 0; Warnings_Detected := 0; Cur_Msg := No_Error_Msg; List_Pragmas.Init; -- Initialize warnings table, if all warnings are suppressed, supply -- an initial dummy entry covering all possible source locations. Warnings.Init; if Warning_Mode = Suppress then Warnings.Increment_Last; Warnings.Table (Warnings.Last).Start := Source_Ptr'First; Warnings.Table (Warnings.Last).Stop := Source_Ptr'Last; end if; -- Set the error nodes to Empty to avoid uninitialized variable -- references for saves/restores/moves. Error_Msg_Node_1 := Empty; Error_Msg_Node_2 := Empty; end Initialize; ----------------- -- No_Warnings -- ----------------- function No_Warnings (N : Node_Or_Entity_Id) return Boolean is begin if Error_Posted (N) then return True; elsif Nkind (N) in N_Entity and then Warnings_Off (N) then return True; elsif Is_Entity_Name (N) and then Present (Entity (N)) and then Warnings_Off (Entity (N)) then return True; else return False; end if; end No_Warnings; ------------- -- OK_Node -- ------------- function OK_Node (N : Node_Id) return Boolean is K : constant Node_Kind := Nkind (N); begin if Error_Posted (N) then return False; elsif K in N_Has_Etype and then Present (Etype (N)) and then Error_Posted (Etype (N)) then return False; elsif (K in N_Op or else K = N_Attribute_Reference or else K = N_Character_Literal or else K = N_Expanded_Name or else K = N_Identifier or else K = N_Operator_Symbol) and then Present (Entity (N)) and then Error_Posted (Entity (N)) then return False; else return True; end if; end OK_Node; ------------------------ -- Output_Source_Line -- ------------------------ procedure Output_Source_Line (L : Physical_Line_Number; Sfile : Source_File_Index; Errs : Boolean) is S : Source_Ptr; C : Character; Line_Number_Output : Boolean := False; -- Set True once line number is output begin if Sfile /= Current_Error_Source_File then Write_Str ("==============Error messages for "); case Sinput.File_Type (Sfile) is when Sinput.Src => Write_Str ("source"); when Sinput.Config => Write_Str ("configuration pragmas"); when Sinput.Def => Write_Str ("symbol definition"); when Sinput.Preproc => Write_Str ("preprocessing data"); end case; Write_Str (" file: "); Write_Name (Full_File_Name (Sfile)); Write_Eol; if Num_SRef_Pragmas (Sfile) > 0 then Write_Str ("--------------Line numbers from file: "); Write_Name (Full_Ref_Name (Sfile)); Write_Str (" (starting at line "); Write_Int (Int (First_Mapped_Line (Sfile))); Write_Char (')'); Write_Eol; end if; Current_Error_Source_File := Sfile; end if; if Errs or List_Pragmas_Mode then Output_Line_Number (Physical_To_Logical (L, Sfile)); Line_Number_Output := True; end if; S := Line_Start (L, Sfile); loop C := Source_Text (Sfile) (S); exit when C = ASCII.LF or else C = ASCII.CR or else C = EOF; -- Deal with matching entry in List_Pragmas table if Full_List and then List_Pragmas_Index <= List_Pragmas.Last and then S = List_Pragmas.Table (List_Pragmas_Index).Ploc then case List_Pragmas.Table (List_Pragmas_Index).Ptyp is when Page => Write_Char (C); -- Ignore if on line with errors so that error flags -- get properly listed with the error line . if not Errs then Write_Char (ASCII.FF); end if; when List_On => List_Pragmas_Mode := True; if not Line_Number_Output then Output_Line_Number (Physical_To_Logical (L, Sfile)); Line_Number_Output := True; end if; Write_Char (C); when List_Off => Write_Char (C); List_Pragmas_Mode := False; end case; List_Pragmas_Index := List_Pragmas_Index + 1; -- Normal case (no matching entry in List_Pragmas table) else if Errs or List_Pragmas_Mode then Write_Char (C); end if; end if; S := S + 1; end loop; if Line_Number_Output then Write_Eol; end if; end Output_Source_Line; ----------------------------- -- Remove_Warning_Messages -- ----------------------------- procedure Remove_Warning_Messages (N : Node_Id) is function Check_For_Warning (N : Node_Id) return Traverse_Result; -- This function checks one node for a possible warning message function Check_All_Warnings is new Traverse_Func (Check_For_Warning); -- This defines the traversal operation ----------------------- -- Check_For_Warning -- ----------------------- function Check_For_Warning (N : Node_Id) return Traverse_Result is Loc : constant Source_Ptr := Sloc (N); E : Error_Msg_Id; function To_Be_Removed (E : Error_Msg_Id) return Boolean; -- Returns True for a message that is to be removed. Also adjusts -- warning count appropriately. ------------------- -- To_Be_Removed -- ------------------- function To_Be_Removed (E : Error_Msg_Id) return Boolean is begin if E /= No_Error_Msg and then Errors.Table (E).Optr = Loc and then (Errors.Table (E).Warn or Errors.Table (E).Style) then Warnings_Detected := Warnings_Detected - 1; return True; else return False; end if; end To_Be_Removed; -- Start of processing for Check_For_Warnings begin while To_Be_Removed (First_Error_Msg) loop First_Error_Msg := Errors.Table (First_Error_Msg).Next; end loop; if First_Error_Msg = No_Error_Msg then Last_Error_Msg := No_Error_Msg; end if; E := First_Error_Msg; while E /= No_Error_Msg loop while To_Be_Removed (Errors.Table (E).Next) loop Errors.Table (E).Next := Errors.Table (Errors.Table (E).Next).Next; if Errors.Table (E).Next = No_Error_Msg then Last_Error_Msg := E; end if; end loop; E := Errors.Table (E).Next; end loop; if Nkind (N) = N_Raise_Constraint_Error and then Original_Node (N) /= N and then No (Condition (N)) then -- Warnings may have been posted on subexpressions of -- the original tree. We place the original node back -- on the tree to remove those warnings, whose sloc -- do not match those of any node in the current tree. -- Given that we are in unreachable code, this modification -- to the tree is harmless. declare Status : Traverse_Result; begin if Is_List_Member (N) then Set_Condition (N, Original_Node (N)); Status := Check_All_Warnings (Condition (N)); else Rewrite (N, Original_Node (N)); Status := Check_All_Warnings (N); end if; return Status; end; else return OK; end if; end Check_For_Warning; -- Start of processing for Remove_Warning_Messages begin if Warnings_Detected /= 0 then declare Discard : Traverse_Result; pragma Warnings (Off, Discard); begin Discard := Check_All_Warnings (N); end; end if; end Remove_Warning_Messages; procedure Remove_Warning_Messages (L : List_Id) is Stat : Node_Id; begin if Is_Non_Empty_List (L) then Stat := First (L); while Present (Stat) loop Remove_Warning_Messages (Stat); Next (Stat); end loop; end if; end Remove_Warning_Messages; --------------------------- -- Set_Identifier_Casing -- --------------------------- procedure Set_Identifier_Casing (Identifier_Name : System.Address; File_Name : System.Address) is type Big_String is array (Positive) of Character; type Big_String_Ptr is access all Big_String; function To_Big_String_Ptr is new Unchecked_Conversion (System.Address, Big_String_Ptr); Ident : constant Big_String_Ptr := To_Big_String_Ptr (Identifier_Name); File : constant Big_String_Ptr := To_Big_String_Ptr (File_Name); Flen : Natural; Desired_Case : Casing_Type := Mixed_Case; -- Casing required for result. Default value of Mixed_Case is used if -- for some reason we cannot find the right file name in the table. begin -- Get length of file name Flen := 0; while File (Flen + 1) /= ASCII.NUL loop Flen := Flen + 1; end loop; -- Loop through file names to find matching one. This is a bit slow, -- but we only do it in error situations so it is not so terrible. -- Note that if the loop does not exit, then the desired case will -- be left set to Mixed_Case, this can happen if the name was not -- in canonical form, and gets canonicalized on VMS. Possibly we -- could fix this by unconditinally canonicalizing these names ??? for J in 1 .. Last_Source_File loop Get_Name_String (Full_Debug_Name (J)); if Name_Len = Flen and then Name_Buffer (1 .. Name_Len) = String (File (1 .. Flen)) then Desired_Case := Identifier_Casing (J); exit; end if; end loop; -- Copy identifier as given to Name_Buffer for J in Name_Buffer'Range loop Name_Buffer (J) := Ident (J); if Name_Buffer (J) = ASCII.Nul then Name_Len := J - 1; exit; end if; end loop; Set_Casing (Desired_Case); end Set_Identifier_Casing; ----------------------- -- Set_Ignore_Errors -- ----------------------- procedure Set_Ignore_Errors (To : Boolean) is begin Errors_Must_Be_Ignored := To; end Set_Ignore_Errors; ------------------------------ -- Set_Msg_Insertion_Column -- ------------------------------ procedure Set_Msg_Insertion_Column is begin if Style.RM_Column_Check then Set_Msg_Str (" in column "); Set_Msg_Int (Int (Error_Msg_Col) + 1); end if; end Set_Msg_Insertion_Column; ---------------------------- -- Set_Msg_Insertion_Node -- ---------------------------- procedure Set_Msg_Insertion_Node is K : Node_Kind; begin Suppress_Message := Error_Msg_Node_1 = Error or else Error_Msg_Node_1 = Any_Type; if Error_Msg_Node_1 = Empty then Set_Msg_Blank_Conditional; Set_Msg_Str ("<empty>"); elsif Error_Msg_Node_1 = Error then Set_Msg_Blank; Set_Msg_Str ("<error>"); elsif Error_Msg_Node_1 = Standard_Void_Type then Set_Msg_Blank; Set_Msg_Str ("procedure name"); else Set_Msg_Blank_Conditional; -- Output name K := Nkind (Error_Msg_Node_1); -- If we have operator case, skip quotes since name of operator -- itself will supply the required quotations. An operator can be -- an applied use in an expression or an explicit operator symbol, -- or an identifier whose name indicates it is an operator. if K in N_Op or else K = N_Operator_Symbol or else K = N_Defining_Operator_Symbol or else ((K = N_Identifier or else K = N_Defining_Identifier) and then Is_Operator_Name (Chars (Error_Msg_Node_1))) then Set_Msg_Node (Error_Msg_Node_1); -- Normal case, not an operator, surround with quotes else Set_Msg_Quote; Set_Qualification (Error_Msg_Qual_Level, Error_Msg_Node_1); Set_Msg_Node (Error_Msg_Node_1); Set_Msg_Quote; end if; end if; -- The following assignment ensures that a second ampersand insertion -- character will correspond to the Error_Msg_Node_2 parameter. Error_Msg_Node_1 := Error_Msg_Node_2; end Set_Msg_Insertion_Node; -------------------------------------- -- Set_Msg_Insertion_Type_Reference -- -------------------------------------- procedure Set_Msg_Insertion_Type_Reference (Flag : Source_Ptr) is Ent : Entity_Id; begin Set_Msg_Blank; if Error_Msg_Node_1 = Standard_Void_Type then Set_Msg_Str ("package or procedure name"); return; elsif Error_Msg_Node_1 = Standard_Exception_Type then Set_Msg_Str ("exception name"); return; elsif Error_Msg_Node_1 = Any_Access or else Error_Msg_Node_1 = Any_Array or else Error_Msg_Node_1 = Any_Boolean or else Error_Msg_Node_1 = Any_Character or else Error_Msg_Node_1 = Any_Composite or else Error_Msg_Node_1 = Any_Discrete or else Error_Msg_Node_1 = Any_Fixed or else Error_Msg_Node_1 = Any_Integer or else Error_Msg_Node_1 = Any_Modular or else Error_Msg_Node_1 = Any_Numeric or else Error_Msg_Node_1 = Any_Real or else Error_Msg_Node_1 = Any_Scalar or else Error_Msg_Node_1 = Any_String then Get_Unqualified_Decoded_Name_String (Chars (Error_Msg_Node_1)); Set_Msg_Name_Buffer; return; elsif Error_Msg_Node_1 = Universal_Real then Set_Msg_Str ("type universal real"); return; elsif Error_Msg_Node_1 = Universal_Integer then Set_Msg_Str ("type universal integer"); return; elsif Error_Msg_Node_1 = Universal_Fixed then Set_Msg_Str ("type universal fixed"); return; end if; -- Special case of anonymous array if Nkind (Error_Msg_Node_1) in N_Entity and then Is_Array_Type (Error_Msg_Node_1) and then Present (Related_Array_Object (Error_Msg_Node_1)) then Set_Msg_Str ("type of "); Set_Msg_Node (Related_Array_Object (Error_Msg_Node_1)); Set_Msg_Str (" declared"); Set_Msg_Insertion_Line_Number (Sloc (Related_Array_Object (Error_Msg_Node_1)), Flag); return; end if; -- If we fall through, it is not a special case, so first output -- the name of the type, preceded by private for a private type if Is_Private_Type (Error_Msg_Node_1) then Set_Msg_Str ("private type "); else Set_Msg_Str ("type "); end if; Ent := Error_Msg_Node_1; if Is_Internal_Name (Chars (Ent)) then Unwind_Internal_Type (Ent); end if; -- Types in Standard are displayed as "Standard.name" if Sloc (Ent) <= Standard_Location then Set_Msg_Quote; Set_Msg_Str ("Standard."); Set_Msg_Node (Ent); Add_Class; Set_Msg_Quote; -- Types in other language defined units are displayed as -- "package-name.type-name" elsif Is_Predefined_File_Name (Unit_File_Name (Get_Source_Unit (Ent))) then Get_Unqualified_Decoded_Name_String (Unit_Name (Get_Source_Unit (Ent))); Name_Len := Name_Len - 2; Set_Msg_Quote; Set_Casing (Mixed_Case); Set_Msg_Name_Buffer; Set_Msg_Char ('.'); Set_Casing (Mixed_Case); Set_Msg_Node (Ent); Add_Class; Set_Msg_Quote; -- All other types display as "type name" defined at line xxx -- possibly qualified if qualification is requested. else Set_Msg_Quote; Set_Qualification (Error_Msg_Qual_Level, Ent); Set_Msg_Node (Ent); Add_Class; Set_Msg_Quote; end if; -- If the original type did not come from a predefined -- file, add the location where the type was defined. if Sloc (Error_Msg_Node_1) > Standard_Location and then not Is_Predefined_File_Name (Unit_File_Name (Get_Source_Unit (Error_Msg_Node_1))) then Set_Msg_Str (" defined"); Set_Msg_Insertion_Line_Number (Sloc (Error_Msg_Node_1), Flag); -- If it did come from a predefined file, deal with the case where -- this was a file with a generic instantiation from elsewhere. else if Sloc (Error_Msg_Node_1) > Standard_Location then declare Iloc : constant Source_Ptr := Instantiation_Location (Sloc (Error_Msg_Node_1)); begin if Iloc /= No_Location and then not Suppress_Instance_Location then Set_Msg_Str (" from instance"); Set_Msg_Insertion_Line_Number (Iloc, Flag); end if; end; end if; end if; end Set_Msg_Insertion_Type_Reference; --------------------------------- -- Set_Msg_Insertion_Unit_Name -- --------------------------------- procedure Set_Msg_Insertion_Unit_Name is begin if Error_Msg_Unit_1 = No_Name then null; elsif Error_Msg_Unit_1 = Error_Name then Set_Msg_Blank; Set_Msg_Str ("<error>"); else Get_Unit_Name_String (Error_Msg_Unit_1); Set_Msg_Blank; Set_Msg_Quote; Set_Msg_Name_Buffer; Set_Msg_Quote; end if; -- The following assignment ensures that a second percent insertion -- character will correspond to the Error_Msg_Unit_2 parameter. Error_Msg_Unit_1 := Error_Msg_Unit_2; end Set_Msg_Insertion_Unit_Name; ------------------ -- Set_Msg_Node -- ------------------ procedure Set_Msg_Node (Node : Node_Id) is Ent : Entity_Id; Nam : Name_Id; begin if Nkind (Node) = N_Designator then Set_Msg_Node (Name (Node)); Set_Msg_Char ('.'); Set_Msg_Node (Identifier (Node)); return; elsif Nkind (Node) = N_Defining_Program_Unit_Name then Set_Msg_Node (Name (Node)); Set_Msg_Char ('.'); Set_Msg_Node (Defining_Identifier (Node)); return; elsif Nkind (Node) = N_Selected_Component then Set_Msg_Node (Prefix (Node)); Set_Msg_Char ('.'); Set_Msg_Node (Selector_Name (Node)); return; end if; -- The only remaining possibilities are identifiers, defining -- identifiers, pragmas, and pragma argument associations, i.e. -- nodes that have a Chars field. -- Internal names generally represent something gone wrong. An exception -- is the case of internal type names, where we try to find a reasonable -- external representation for the external name if Is_Internal_Name (Chars (Node)) and then ((Is_Entity_Name (Node) and then Present (Entity (Node)) and then Is_Type (Entity (Node))) or else (Nkind (Node) = N_Defining_Identifier and then Is_Type (Node))) then if Nkind (Node) = N_Identifier then Ent := Entity (Node); else Ent := Node; end if; Unwind_Internal_Type (Ent); Nam := Chars (Ent); else Nam := Chars (Node); end if; -- At this stage, the name to output is in Nam Get_Unqualified_Decoded_Name_String (Nam); -- Remove trailing upper case letters from the name (useful for -- dealing with some cases of internal names. while Name_Len > 1 and then Name_Buffer (Name_Len) in 'A' .. 'Z' loop Name_Len := Name_Len - 1; end loop; -- If we have any of the names from standard that start with the -- characters "any " (e.g. Any_Type), then kill the message since -- almost certainly it is a junk cascaded message. if Name_Len > 4 and then Name_Buffer (1 .. 4) = "any " then Kill_Message := True; end if; -- Now we have to set the proper case. If we have a source location -- then do a check to see if the name in the source is the same name -- as the name in the Names table, except for possible differences -- in case, which is the case when we can copy from the source. declare Src_Loc : constant Source_Ptr := Sloc (Error_Msg_Node_1); Sbuffer : Source_Buffer_Ptr; Ref_Ptr : Integer; Src_Ptr : Source_Ptr; begin Ref_Ptr := 1; Src_Ptr := Src_Loc; -- For standard locations, always use mixed case if Src_Loc <= No_Location or else Sloc (Node) <= No_Location then Set_Casing (Mixed_Case); else -- Determine if the reference we are dealing with corresponds -- to text at the point of the error reference. This will often -- be the case for simple identifier references, and is the case -- where we can copy the spelling from the source. Sbuffer := Source_Text (Get_Source_File_Index (Src_Loc)); while Ref_Ptr <= Name_Len loop exit when Fold_Lower (Sbuffer (Src_Ptr)) /= Fold_Lower (Name_Buffer (Ref_Ptr)); Ref_Ptr := Ref_Ptr + 1; Src_Ptr := Src_Ptr + 1; end loop; -- If we get through the loop without a mismatch, then output -- the name the way it is spelled in the source program if Ref_Ptr > Name_Len then Src_Ptr := Src_Loc; for J in 1 .. Name_Len loop Name_Buffer (J) := Sbuffer (Src_Ptr); Src_Ptr := Src_Ptr + 1; end loop; -- Otherwise set the casing using the default identifier casing else Set_Casing (Identifier_Casing (Flag_Source), Mixed_Case); end if; end if; end; Set_Msg_Name_Buffer; Add_Class; end Set_Msg_Node; ------------------ -- Set_Msg_Text -- ------------------ procedure Set_Msg_Text (Text : String; Flag : Source_Ptr) is C : Character; -- Current character P : Natural; -- Current index; begin Manual_Quote_Mode := False; Is_Unconditional_Msg := False; Msglen := 0; Flag_Source := Get_Source_File_Index (Flag); P := Text'First; while P <= Text'Last loop C := Text (P); P := P + 1; -- Check for insertion character case C is when '%' => Set_Msg_Insertion_Name; when '$' => Set_Msg_Insertion_Unit_Name; when '{' => Set_Msg_Insertion_File_Name; when '}' => Set_Msg_Insertion_Type_Reference (Flag); when '*' => Set_Msg_Insertion_Reserved_Name; when '&' => Set_Msg_Insertion_Node; when '#' => Set_Msg_Insertion_Line_Number (Error_Msg_Sloc, Flag); when '\' => Continuation := True; when '@' => Set_Msg_Insertion_Column; when '>' => Set_Msg_Insertion_Run_Time_Name; when '^' => Set_Msg_Insertion_Uint; when '`' => Manual_Quote_Mode := not Manual_Quote_Mode; Set_Msg_Char ('"'); when '!' => Is_Unconditional_Msg := True; when '?' => null; -- already dealt with when '<' => null; -- already dealt with when '|' => null; -- already dealt with when ''' => Set_Msg_Char (Text (P)); P := P + 1; -- Upper case letter when 'A' .. 'Z' => -- Start of reserved word if two or more if P <= Text'Last and then Text (P) in 'A' .. 'Z' then P := P - 1; Set_Msg_Insertion_Reserved_Word (Text, P); -- Single upper case letter is just inserted else Set_Msg_Char (C); end if; -- Normal character with no special treatment when others => Set_Msg_Char (C); end case; end loop; VMS_Convert; end Set_Msg_Text; ---------------- -- Set_Posted -- ---------------- procedure Set_Posted (N : Node_Id) is P : Node_Id; begin if Is_Serious_Error then -- We always set Error_Posted on the node itself Set_Error_Posted (N); -- If it is a subexpression, then set Error_Posted on parents -- up to and including the first non-subexpression construct. This -- helps avoid cascaded error messages within a single expression. P := N; loop P := Parent (P); exit when No (P); Set_Error_Posted (P); exit when Nkind (P) not in N_Subexpr; end loop; -- A special check, if we just posted an error on an attribute -- definition clause, then also set the entity involved as posted. -- For example, this stops complaining about the alignment after -- complaining about the size, which is likely to be useless. if Nkind (P) = N_Attribute_Definition_Clause then if Is_Entity_Name (Name (P)) then Set_Error_Posted (Entity (Name (P))); end if; end if; end if; end Set_Posted; ----------------------- -- Set_Qualification -- ----------------------- procedure Set_Qualification (N : Nat; E : Entity_Id) is begin if N /= 0 and then Scope (E) /= Standard_Standard then Set_Qualification (N - 1, Scope (E)); Set_Msg_Node (Scope (E)); Set_Msg_Char ('.'); end if; end Set_Qualification; ------------------------ -- Special_Msg_Delete -- ------------------------ function Special_Msg_Delete (Msg : String; N : Node_Or_Entity_Id; E : Node_Or_Entity_Id) return Boolean is begin -- Never delete messages in -gnatdO mode if Debug_Flag_OO then return False; -- When an atomic object refers to a non-atomic type in the same -- scope, we implicitly make the type atomic. In the non-error -- case this is surely safe (and in fact prevents an error from -- occurring if the type is not atomic by default). But if the -- object cannot be made atomic, then we introduce an extra junk -- message by this manipulation, which we get rid of here. -- We identify this case by the fact that it references a type for -- which Is_Atomic is set, but there is no Atomic pragma setting it. elsif Msg = "atomic access to & cannot be guaranteed" and then Is_Type (E) and then Is_Atomic (E) and then No (Get_Rep_Pragma (E, Name_Atomic)) then return True; -- When a size is wrong for a frozen type there is no explicit -- size clause, and other errors have occurred, suppress the -- message, since it is likely that this size error is a cascaded -- result of other errors. The reason we eliminate unfrozen types -- is that messages issued before the freeze type are for sure OK. elsif Msg = "size for& too small, minimum allowed is ^" and then Is_Frozen (E) and then Serious_Errors_Detected > 0 and then Nkind (N) /= N_Component_Clause and then Nkind (Parent (N)) /= N_Component_Clause and then No (Get_Attribute_Definition_Clause (E, Attribute_Size)) and then No (Get_Attribute_Definition_Clause (E, Attribute_Object_Size)) and then No (Get_Attribute_Definition_Clause (E, Attribute_Value_Size)) then return True; -- All special tests complete, so go ahead with message else return False; end if; end Special_Msg_Delete; -------------------------- -- Unwind_Internal_Type -- -------------------------- procedure Unwind_Internal_Type (Ent : in out Entity_Id) is Derived : Boolean := False; Mchar : Character; Old_Ent : Entity_Id; begin -- Undo placement of a quote, since we will put it back later Mchar := Msg_Buffer (Msglen); if Mchar = '"' then Msglen := Msglen - 1; end if; -- The loop here deals with recursive types, we are trying to -- find a related entity that is not an implicit type. Note -- that the check with Old_Ent stops us from getting "stuck". -- Also, we don't output the "type derived from" message more -- than once in the case where we climb up multiple levels. loop Old_Ent := Ent; -- Implicit access type, use directly designated type if Is_Access_Type (Ent) then Set_Msg_Str ("access to "); Ent := Directly_Designated_Type (Ent); -- Classwide type elsif Is_Class_Wide_Type (Ent) then Class_Flag := True; Ent := Root_Type (Ent); -- Use base type if this is a subtype elsif Ent /= Base_Type (Ent) then Buffer_Remove ("type "); -- Avoid duplication "subtype of subtype of", and also replace -- "derived from subtype of" simply by "derived from" if not Buffer_Ends_With ("subtype of ") and then not Buffer_Ends_With ("derived from ") then Set_Msg_Str ("subtype of "); end if; Ent := Base_Type (Ent); -- If this is a base type with a first named subtype, use the -- first named subtype instead. This is not quite accurate in -- all cases, but it makes too much noise to be accurate and -- add 'Base in all cases. Note that we only do this is the -- first named subtype is not itself an internal name. This -- avoids the obvious loop (subtype->basetype->subtype) which -- would otherwise occur!) elsif Present (Freeze_Node (Ent)) and then Present (First_Subtype_Link (Freeze_Node (Ent))) and then not Is_Internal_Name (Chars (First_Subtype_Link (Freeze_Node (Ent)))) then Ent := First_Subtype_Link (Freeze_Node (Ent)); -- Otherwise use root type else if not Derived then Buffer_Remove ("type "); -- Test for "subtype of type derived from" which seems -- excessive and is replaced by simply "type derived from" Buffer_Remove ("subtype of"); -- Avoid duplication "type derived from type derived from" if not Buffer_Ends_With ("type derived from ") then Set_Msg_Str ("type derived from "); end if; Derived := True; end if; Ent := Etype (Ent); end if; -- If we are stuck in a loop, get out and settle for the internal -- name after all. In this case we set to kill the message if it -- is not the first error message (we really try hard not to show -- the dirty laundry of the implementation to the poor user!) if Ent = Old_Ent then Kill_Message := True; exit; end if; -- Get out if we finally found a non-internal name to use exit when not Is_Internal_Name (Chars (Ent)); end loop; if Mchar = '"' then Set_Msg_Char ('"'); end if; end Unwind_Internal_Type; ----------------- -- VMS_Convert -- ----------------- procedure VMS_Convert is P : Natural; L : Natural; N : Natural; begin if not OpenVMS then return; end if; P := Msg_Buffer'First; loop if P >= Msglen then return; end if; if Msg_Buffer (P) = '-' then for G in Gnames'Range loop L := Gnames (G)'Length; -- See if we have "-ggg switch", where ggg is Gnames entry if P + L + 7 <= Msglen and then Msg_Buffer (P + 1 .. P + L) = Gnames (G).all and then Msg_Buffer (P + L + 1 .. P + L + 7) = " switch" then -- Replace by "/vvv qualifier", where vvv is Vnames entry N := Vnames (G)'Length; Msg_Buffer (P + N + 11 .. Msglen + N - L + 3) := Msg_Buffer (P + L + 8 .. Msglen); Msg_Buffer (P) := '/'; Msg_Buffer (P + 1 .. P + N) := Vnames (G).all; Msg_Buffer (P + N + 1 .. P + N + 10) := " qualifier"; P := P + N + 10; Msglen := Msglen + N - L + 3; exit; end if; end loop; end if; P := P + 1; end loop; end VMS_Convert; end Errout;
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