------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- E R R O U T -- -- -- -- B o d y -- -- -- -- -- -- Copyright (C) 1992-2002 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, 59 Temple Place - Suite 330, Boston, -- -- MA 02111-1307, USA. -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). -- -- -- ------------------------------------------------------------------------------ -- 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 Fname; use Fname; with 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 Uintp; use Uintp; with Uname; use Uname; package body Errout is Class_Flag : Boolean := False; -- This flag is set True when outputting a reference to a class-wide -- type, and is used by Add_Class to insert 'Class at the proper point Continuation : Boolean; -- Indicates if current message is a continuation. Initialized from the -- Msg_Cont parameter in Error_Msg_Internal and then set True if a \ -- insertion character is encountered. Cur_Msg : Error_Msg_Id; -- Id of most recently posted error message Flag_Source : Source_File_Index; -- Source file index for source file where error is being posted Is_Warning_Msg : Boolean; -- Set by Set_Msg_Text to indicate if current message is warning message Is_Serious_Error : Boolean; -- Set by Set_Msg_Text to indicate if current message is serious error Is_Unconditional_Msg : Boolean; -- Set by Set_Msg_Text to indicate if current message is unconditional Kill_Message : Boolean; -- A flag used to kill weird messages (e.g. those containing uninterpreted -- implicit type references) if we have already seen at least one message -- already. The idea is that we hope the weird message is a junk cascaded -- message that should be suppressed. Last_Killed : Boolean := False; -- Set True if the most recently posted non-continuation message was -- killed. This is used to determine the processing of any continuation -- messages that follow. List_Pragmas_Index : Int; -- Index into List_Pragmas table List_Pragmas_Mode : Boolean; -- Starts True, gets set False by pragma List (Off), True by List (On) Manual_Quote_Mode : Boolean; -- Set True in manual quotation mode Max_Msg_Length : constant := 80 + 2 * Hostparm.Max_Line_Length; -- Maximum length of error message. The addition of Max_Line_Length -- ensures that two insertion tokens of maximum length can be accomodated. Msg_Buffer : String (1 .. Max_Msg_Length); -- Buffer used to prepare error messages Msglen : Integer; -- Number of characters currently stored in the message buffer Suppress_Message : Boolean; -- A flag used to suppress certain obviously redundant messages (i.e. -- those referring to a node whose type is Any_Type). This suppression -- is effective only if All_Errors_Mode is off. Suppress_Instance_Location : Boolean := False; -- Normally, if a # location in a message references a location within -- a generic template, then a note is added giving the location of the -- instantiation. If this variable is set True, then this note is not -- output. This is used for internal processing for the case of an -- illegal instantiation. See Error_Msg routine for further details. ----------------------------------- -- Error Message Data Structures -- ----------------------------------- -- The error messages are stored as a linked list of error message objects -- sorted into ascending order by the source location (Sloc). Each object -- records the text of the message and its source location. -- The following record type and table are used to represent error -- messages, with one entry in the table being allocated for each message. type Error_Msg_Object is record Text : String_Ptr; -- Text of error message, fully expanded with all insertions Next : Error_Msg_Id; -- Pointer to next message in error chain Sfile : Source_File_Index; -- Source table index of source file. In the case of an error that -- refers to a template, always references the original template -- not an instantiation copy. Sptr : Source_Ptr; -- Flag pointer. In the case of an error that refers to a template, -- always references the original template, not an instantiation copy. -- This value is the actual place in the source that the error message -- will be posted. Fptr : Source_Ptr; -- Flag location used in the call to post the error. This is normally -- the same as Sptr, except in the case of instantiations, where it -- is the original flag location value. This may refer to an instance -- when the actual message (and hence Sptr) references the template. Line : Physical_Line_Number; -- Line number for error message Col : Column_Number; -- Column number for error message Warn : Boolean; -- True if warning message (i.e. insertion character ? appeared) Serious : Boolean; -- True if serious error message (not a warning and no | character) Uncond : Boolean; -- True if unconditional message (i.e. insertion character ! appeared) Msg_Cont : Boolean; -- This is used for logical messages that are composed of multiple -- individual messages. For messages that are not part of such a -- group, or that are the first message in such a group. Msg_Cont -- is set to False. For subsequent messages in a group, Msg_Cont -- is set to True. This is used to make sure that such a group of -- messages is either suppressed or retained as a group (e.g. in -- the circuit that deletes identical messages). Deleted : Boolean; -- If this flag is set, the message is not printed. This is used -- in the circuit for deleting duplicate/redundant error messages. end record; package Errors is new Table.Table ( Table_Component_Type => Error_Msg_Object, Table_Index_Type => Error_Msg_Id, Table_Low_Bound => 1, Table_Initial => 200, Table_Increment => 200, Table_Name => "Error"); Error_Msgs : Error_Msg_Id; -- The list of error messages -------------------------- -- Warning Mode Control -- -------------------------- -- Pragma Warnings allows warnings to be turned off for a specified -- region of code, and the following tabl is the data structure used -- to keep track of these regions. -- It contains pairs of source locations, the first being the start -- location for a warnings off region, and the second being the end -- location. When a pragma Warnings (Off) is encountered, a new entry -- is established extending from the location of the pragma to the -- end of the current source file. A subsequent pragma Warnings (On) -- adjusts the end point of this entry appropriately. -- If all warnings are suppressed by comamnd switch, then there is a -- dummy entry (put there by Errout.Initialize) at the start of the -- table which covers all possible Source_Ptr values. Note that the -- source pointer values in this table always reference the original -- template, not an instantiation copy, in the generic case. type Warnings_Entry is record Start : Source_Ptr; Stop : Source_Ptr; end record; package Warnings is new Table.Table ( Table_Component_Type => Warnings_Entry, Table_Index_Type => Natural, Table_Low_Bound => 1, Table_Initial => 100, Table_Increment => 200, Table_Name => "Warnings"); ----------------------- -- Local Subprograms -- ----------------------- procedure Add_Class; -- Add 'Class to buffer for class wide type case (Class_Flag set) function Buffer_Ends_With (S : String) return Boolean; -- Tests if message buffer ends with given string preceded by a space procedure Buffer_Remove (S : String); -- Removes given string from end of buffer if it is present -- at end of buffer, and preceded by a space. procedure Debug_Output (N : Node_Id); -- Called from Error_Msg_N and Error_Msg_NE to generate line of debug -- output giving node number (of node N) if the debug X switch is set. procedure Check_Duplicate_Message (M1, M2 : Error_Msg_Id); -- This function is passed the Id values of two error messages. If -- either M1 or M2 is a continuation message, or is already deleted, -- the call is ignored. Otherwise a check is made to see if M1 and M2 -- are duplicated or redundant. If so, the message to be deleted and -- all its continuations are marked with the Deleted flag set to True. procedure Error_Msg_Internal (Msg : String; Flag_Location : Source_Ptr; Msg_Cont : Boolean); -- This is like Error_Msg, except that Flag_Location is known not to be -- a location within a instantiation of a generic template. The outer -- level routine, Error_Msg, takes care of dealing with the generic case. -- Msg_Cont is set True to indicate that the message is a continuation of -- a previous message. This means that it must have the same Flag_Location -- as the previous message. procedure Set_Next_Non_Deleted_Msg (E : in out Error_Msg_Id); -- Given a message id, move to next message id, but skip any deleted -- messages, so that this results in E on output being the first non- -- deleted message following the input value of E, or No_Error_Msg if -- the input value of E was either already No_Error_Msg, or was the -- last non-deleted 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_Error_Msgs (E : in out Error_Msg_Id); -- Output source line, error flag, and text of stored error message and -- all subsequent messages for the same line and unit. On return E is -- set to be one higher than the last message output. procedure Output_Line_Number (L : Logical_Line_Number); -- Output a line number as six digits (with leading zeroes suppressed), -- followed by a period and a blank (note that this is 8 characters which -- means that tabs in the source line will not get messed up). Line numbers -- that match or are less than the last Source_Reference pragma are listed -- as all blanks, avoiding output of junk line numbers. procedure Output_Msg_Text (E : Error_Msg_Id); -- Outputs characters of text in the text of the error message E, excluding -- any final exclamation point. Note that no end of line is output, the -- caller is responsible for adding the end of line. 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). function Same_Error (M1, M2 : Error_Msg_Id) return Boolean; -- See if two messages have the same text. Returns true if the text -- of the two messages is identical, or if one of them is the same -- as the other with an appended "instance at xxx" tag. procedure Set_Msg_Blank; -- Sets a single blank in the message if the preceding character is a -- non-blank character other than a left parenthesis. Has no effect if -- manual quote mode is turned on. procedure Set_Msg_Blank_Conditional; -- Sets a single blank in the message if the preceding character is a -- non-blank character other than a left parenthesis or quote. Has no -- effect if manual quote mode is turned on. procedure Set_Msg_Char (C : Character); -- Add a single character to the current message. This routine does not -- check for special insertion characters (they are just treated as text -- characters if they occur). procedure Set_Msg_Insertion_Column; -- Handle column number insertion (@ insertion character) procedure Set_Msg_Insertion_Name; -- Handle name insertion (% insertion character) procedure Set_Msg_Insertion_Line_Number (Loc, Flag : Source_Ptr); -- Handle line number insertion (# insertion character). Loc is the -- location to be referenced, and Flag is the location at which the -- flag is posted (used to determine whether to add "in file xxx") procedure Set_Msg_Insertion_Node; -- Handle node (name from node) insertion (& insertion character) procedure Set_Msg_Insertion_Reserved_Name; -- Handle insertion of reserved word name (* insertion character). procedure Set_Msg_Insertion_Reserved_Word (Text : String; J : in out Integer); -- Handle reserved word insertion (upper case letters). The Text argument -- is the current error message input text, and J is an index which on -- entry points to the first character of the reserved word, and on exit -- points past the last character of the reserved word. 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_Uint; -- Handle Uint insertion (^ insertion character) procedure Set_Msg_Insertion_Unit_Name; -- Handle unit name insertion ($ insertion character) procedure Set_Msg_Insertion_File_Name; -- Handle file name insertion (left brace insertion character) procedure Set_Msg_Int (Line : Int); -- Set the decimal representation of the argument in the error message -- buffer with no leading zeroes output. procedure Set_Msg_Name_Buffer; -- Output name from Name_Buffer, with surrounding quotes unless manual -- quotation mode is in effect. 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_Quote; -- Set quote if in normal quote mode, nothing if in manual quote mode procedure Set_Msg_Str (Text : String); -- Add a sequence of characters to the current message. This routine does -- not check for special insertion characters (they are just treated as -- text characters if they occur). 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_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) 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 Test_Warning_Msg (Msg : String); -- Sets Is_Warning_Msg true if Msg is a warning message (contains a -- question mark character), and False otherwise. 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. function Warnings_Suppressed (Loc : Source_Ptr) return Boolean; -- Determines if given location is covered by a warnings off suppression -- range in the warnings table (or is suppressed by compilation option, -- which generates a warning range for the whole source file). --------------- -- Add_Class -- --------------- procedure Add_Class is begin if Class_Flag then Class_Flag := False; Set_Msg_Char ('''); Get_Name_String (Name_Class); Set_Casing (Identifier_Casing (Flag_Source), Mixed_Case); Set_Msg_Name_Buffer; end if; end Add_Class; ---------------------- -- Buffer_Ends_With -- ---------------------- function Buffer_Ends_With (S : String) return Boolean is Len : constant Natural := S'Length; begin return Msglen > Len and then Msg_Buffer (Msglen - Len) = ' ' and then Msg_Buffer (Msglen - Len + 1 .. Msglen) = S; end Buffer_Ends_With; ------------------- -- Buffer_Remove -- ------------------- procedure Buffer_Remove (S : String) is begin if Buffer_Ends_With (S) then Msglen := Msglen - S'Length; end if; end Buffer_Remove; ----------------------- -- 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; ----------------------------- -- Check_Duplicate_Message -- ----------------------------- procedure Check_Duplicate_Message (M1, M2 : Error_Msg_Id) is L1, L2 : Error_Msg_Id; N1, N2 : Error_Msg_Id; procedure Delete_Msg (Delete, Keep : Error_Msg_Id); -- Called to delete message Delete, keeping message Keep. Marks -- all messages of Delete with deleted flag set to True, and also -- makes sure that for the error messages that are retained the -- preferred message is the one retained (we prefer the shorter -- one in the case where one has an Instance tag). Note that we -- always know that Keep has at least as many continuations as -- Delete (since we always delete the shorter sequence). ---------------- -- Delete_Msg -- ---------------- procedure Delete_Msg (Delete, Keep : Error_Msg_Id) is D, K : Error_Msg_Id; begin D := Delete; K := Keep; loop Errors.Table (D).Deleted := True; -- Adjust error message count if Errors.Table (D).Warn then Warnings_Detected := Warnings_Detected - 1; else Total_Errors_Detected := Total_Errors_Detected - 1; if Errors.Table (D).Serious then Serious_Errors_Detected := Serious_Errors_Detected - 1; end if; end if; -- Substitute shorter of the two error messages if Errors.Table (K).Text'Length > Errors.Table (D).Text'Length then Errors.Table (K).Text := Errors.Table (D).Text; end if; D := Errors.Table (D).Next; K := Errors.Table (K).Next; if D = No_Error_Msg or else not Errors.Table (D).Msg_Cont then return; end if; end loop; end Delete_Msg; -- Start of processing for Check_Duplicate_Message begin -- Both messages must be non-continuation messages and not deleted if Errors.Table (M1).Msg_Cont or else Errors.Table (M2).Msg_Cont or else Errors.Table (M1).Deleted or else Errors.Table (M2).Deleted then return; end if; -- Definitely not equal if message text does not match if not Same_Error (M1, M2) then return; end if; -- Same text. See if all continuations are also identical L1 := M1; L2 := M2; loop N1 := Errors.Table (L1).Next; N2 := Errors.Table (L2).Next; -- If M1 continuations have run out, we delete M1, either the -- messages have the same number of continuations, or M2 has -- more and we prefer the one with more anyway. if N1 = No_Error_Msg or else not Errors.Table (N1).Msg_Cont then Delete_Msg (M1, M2); return; -- If M2 continuatins have run out, we delete M2 elsif N2 = No_Error_Msg or else not Errors.Table (N2).Msg_Cont then Delete_Msg (M2, M1); return; -- Otherwise see if continuations are the same, if not, keep both -- sequences, a curious case, but better to keep everything! elsif not Same_Error (N1, N2) then return; -- If continuations are the same, continue scan else L1 := N1; L2 := N2; end if; end loop; end Check_Duplicate_Message; ------------------------ -- Compilation_Errors -- ------------------------ function Compilation_Errors return Boolean is begin return Total_Errors_Detected /= 0 or else (Warnings_Detected /= 0 and then Warning_Mode = Treat_As_Error); end Compilation_Errors; ------------------ -- Debug_Output -- ------------------ procedure Debug_Output (N : Node_Id) is begin if Debug_Flag_1 then Write_Str ("*** following error message posted on node id = #"); Write_Int (Int (N)); Write_Str (" ***"); Write_Eol; end if; end Debug_Output; ---------- -- dmsg -- ---------- procedure dmsg (Id : Error_Msg_Id) is E : Error_Msg_Object renames Errors.Table (Id); begin w ("Dumping error message, Id = ", Int (Id)); w (" Text = ", E.Text.all); w (" Next = ", Int (E.Next)); w (" Sfile = ", Int (E.Sfile)); Write_Str (" Sptr = "); Write_Location (E.Sptr); Write_Eol; Write_Str (" Fptr = "); Write_Location (E.Fptr); Write_Eol; w (" Line = ", Int (E.Line)); w (" Col = ", Int (E.Col)); w (" Warn = ", E.Warn); w (" Serious = ", E.Serious); w (" Uncond = ", E.Uncond); w (" Msg_Cont = ", E.Msg_Cont); w (" Deleted = ", E.Deleted); Write_Eol; end dmsg; --------------- -- 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 -- 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; Sindex := Get_Source_File_Index (Flag_Location); Test_Warning_Msg (Msg); -- It is a fatal error to issue an error message when scanning from -- the internal source buffer (see Sinput for further documentation) pragma Assert (Source /= Internal_Source_Ptr); -- Ignore warning message that is suppressed Orig_Loc := Original_Location (Flag_Location); 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 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, 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. -- However, before we do this, we need to worry about the case where -- indeed we are in an instantiation, but the message is a warning -- message. In this case, it almost certainly a warning for the -- template itself and so it is posted on the template. At least -- this is the default mode, it can be cancelled (resulting the -- warning being placed on the instance as in the error case) by -- setting the global Warn_On_Instance True. if (not Warn_On_Instance) and then Is_Warning_Msg then Error_Msg_Internal (Msg, Flag_Location, False); return; end if; -- Second, we need to worry about the case where there was a real error -- in the template, and we are getting a repeat of this error in the -- instantiation. We don't want to complain about the instantiation -- in this case, since we have already flagged the template. -- To deal with this case, just see if we have posted a message at -- the template location already. If so, assume that the current -- message is redundant. There could be cases in which this is not -- a correct assumption, but it is not terrible to lose a message -- about an incorrect instantiation given that we have already -- flagged a message on the template. for Err in Errors.First .. Errors.Last loop if Errors.Table (Err).Sptr = Orig_Loc then -- If the current message is a real error, as opposed to a -- warning, then we don't want to let a warning on the -- template inhibit a real error on the instantiation. if Is_Warning_Msg or else not Errors.Table (Err).Warn then return; end if; end if; end loop; -- 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. First, see if we have posted this exact error -- before, and if so suppress it. It is not so easy to use the main -- list of errors for this, since they have already been split up -- according to the processing below. Consequently we use an auxiliary -- data structure that just records these types of messages (it will -- never have very many entries). 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 (1) /= '\' then if Is_Warning_Msg then Error_Msg_Internal ("?in instantiation #", Actual_Error_Loc, Msg_Cont_Status); else Error_Msg_Internal ("instantiation error #", Actual_Error_Loc, Msg_Cont_Status); 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, 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. 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) 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_Internal -- ------------------------ procedure Error_Msg_Internal (Msg : String; Flag_Location : 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; Orig_Loc : constant Source_Ptr := Original_Location (Flag_Location); 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 (Orig_Loc)); 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, Orig_Loc); -- 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; -- Immediate return if warning message and warnings are suppressed if Is_Warning_Msg and then Warnings_Suppressed (Orig_Loc) then Cur_Msg := No_Error_Msg; return; 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 := Orig_Loc; Errors.Table (Cur_Msg).Fptr := Flag_Location; Errors.Table (Cur_Msg).Sfile := Get_Source_File_Index (Orig_Loc); Errors.Table (Cur_Msg).Line := Get_Physical_Line_Number (Orig_Loc); Errors.Table (Cur_Msg).Col := Get_Column_Number (Orig_Loc); Errors.Table (Cur_Msg).Warn := Is_Warning_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 Prev_Msg := No_Error_Msg; Next_Msg := Error_Msgs; 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 Orig_Loc < Errors.Table (Next_Msg).Sptr; end if; Prev_Msg := Next_Msg; Next_Msg := Errors.Table (Next_Msg).Next; end loop; -- 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 else Errors.Table (Cur_Msg).Warn 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 Error_Msgs := Cur_Msg; else Errors.Table (Prev_Msg).Next := Cur_Msg; end if; Errors.Table (Cur_Msg).Next := Next_Msg; end if; -- Bump appropriate statistics count if Errors.Table (Cur_Msg).Warn 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; if No_Warnings (N) or else No_Warnings (E) then Test_Warning_Msg (Msg); if Is_Warning_Msg then return; end if; end if; if All_Errors_Mode or else Msg (Msg'Last) = '!' or else OK_Node (N) or else (Msg (1) = '\' 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 then Set_Posted (N); end if; end Error_Msg_NEL; ----------------- -- 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 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 := Error_Msgs; 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 E := Error_Msgs; Set_Standard_Error; while E /= No_Error_Msg loop if not Errors.Table (E).Deleted and then not Debug_Flag_KK then Write_Name (Reference_Name (Errors.Table (E).Sfile)); 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 := Error_Msgs; 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 := Error_Msgs; -- 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; ------------------ -- Get_Location -- ------------------ function Get_Location (E : Error_Msg_Id) return Source_Ptr is begin return Errors.Table (E).Sptr; end Get_Location; ---------------- -- Get_Msg_Id -- ---------------- function Get_Msg_Id return Error_Msg_Id is begin return Cur_Msg; end Get_Msg_Id; ---------------- -- Initialize -- ---------------- procedure Initialize is begin Errors.Init; Error_Msgs := 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; 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_Error_Msgs -- ----------------------- procedure Output_Error_Msgs (E : in out Error_Msg_Id) is P : Source_Ptr; T : Error_Msg_Id; S : Error_Msg_Id; Flag_Num : Pos; Mult_Flags : Boolean := False; begin S := E; -- Skip deleted messages at start if Errors.Table (S).Deleted then Set_Next_Non_Deleted_Msg (S); end if; -- Figure out if we will place more than one error flag on this line T := S; while T /= No_Error_Msg and then Errors.Table (T).Line = Errors.Table (E).Line and then Errors.Table (T).Sfile = Errors.Table (E).Sfile loop if Errors.Table (T).Sptr > Errors.Table (E).Sptr then Mult_Flags := True; end if; Set_Next_Non_Deleted_Msg (T); end loop; -- Output the error flags. The circuit here makes sure that the tab -- characters in the original line are properly accounted for. The -- eight blanks at the start are to match the line number. if not Debug_Flag_2 then Write_Str (" "); P := Line_Start (Errors.Table (E).Sptr); Flag_Num := 1; -- Loop through error messages for this line to place flags T := S; while T /= No_Error_Msg and then Errors.Table (T).Line = Errors.Table (E).Line and then Errors.Table (T).Sfile = Errors.Table (E).Sfile loop -- Loop to output blanks till current flag position while P < Errors.Table (T).Sptr loop if Source_Text (Errors.Table (T).Sfile) (P) = ASCII.HT then Write_Char (ASCII.HT); else Write_Char (' '); end if; P := P + 1; end loop; -- Output flag (unless already output, this happens if more -- than one error message occurs at the same flag position). if P = Errors.Table (T).Sptr then if (Flag_Num = 1 and then not Mult_Flags) or else Flag_Num > 9 then Write_Char ('|'); else Write_Char (Character'Val (Character'Pos ('0') + Flag_Num)); end if; P := P + 1; end if; Set_Next_Non_Deleted_Msg (T); Flag_Num := Flag_Num + 1; end loop; Write_Eol; end if; -- Now output the error messages T := S; while T /= No_Error_Msg and then Errors.Table (T).Line = Errors.Table (E).Line and then Errors.Table (T).Sfile = Errors.Table (E).Sfile loop Write_Str (" >>> "); Output_Msg_Text (T); if Debug_Flag_2 then while Column < 74 loop Write_Char (' '); end loop; Write_Str (" <<<"); end if; Write_Eol; Set_Next_Non_Deleted_Msg (T); end loop; E := T; end Output_Error_Msgs; ------------------------ -- Output_Line_Number -- ------------------------ procedure Output_Line_Number (L : Logical_Line_Number) is D : Int; -- next digit C : Character; -- next character Z : Boolean; -- flag for zero suppress N, M : Int; -- temporaries begin if L = No_Line_Number then Write_Str (" "); else Z := False; N := Int (L); M := 100_000; while M /= 0 loop D := Int (N / M); N := N rem M; M := M / 10; if D = 0 then if Z then C := '0'; else C := ' '; end if; else Z := True; C := Character'Val (D + 48); end if; Write_Char (C); end loop; Write_Str (". "); end if; end Output_Line_Number; --------------------- -- Output_Msg_Text -- --------------------- procedure Output_Msg_Text (E : Error_Msg_Id) is begin if Errors.Table (E).Warn then if Errors.Table (E).Text'Length > 7 and then Errors.Table (E).Text (1 .. 7) /= "(style)" then Write_Str ("warning: "); end if; elsif Opt.Unique_Error_Tag then Write_Str ("error: "); end if; Write_Str (Errors.Table (E).Text.all); end Output_Msg_Text; ------------------------ -- 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 source 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 starting line, except do not write it if we had more -- than one source reference pragma, since in this case there -- is no very useful number to write. 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; -------------------- -- Purge_Messages -- -------------------- procedure Purge_Messages (From : Source_Ptr; To : Source_Ptr) is E : Error_Msg_Id; function To_Be_Purged (E : Error_Msg_Id) return Boolean; -- Returns True for a message that is to be purged. Also adjusts -- error counts appropriately. function To_Be_Purged (E : Error_Msg_Id) return Boolean is begin if E /= No_Error_Msg and then Errors.Table (E).Sptr > From and then Errors.Table (E).Sptr < To then if Errors.Table (E).Warn then Warnings_Detected := Warnings_Detected - 1; else Total_Errors_Detected := Total_Errors_Detected - 1; if Errors.Table (E).Serious then Serious_Errors_Detected := Serious_Errors_Detected - 1; end if; end if; return True; else return False; end if; end To_Be_Purged; -- Start of processing for Purge_Messages begin while To_Be_Purged (Error_Msgs) loop Error_Msgs := Errors.Table (Error_Msgs).Next; end loop; E := Error_Msgs; while E /= No_Error_Msg loop while To_Be_Purged (Errors.Table (E).Next) loop Errors.Table (E).Next := Errors.Table (Errors.Table (E).Next).Next; end loop; E := Errors.Table (E).Next; end loop; end Purge_Messages; ----------------------------- -- 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).Fptr = Loc and then Errors.Table (E).Warn 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 (Error_Msgs) loop Error_Msgs := Errors.Table (Error_Msgs).Next; end loop; E := Error_Msgs; 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; 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; begin Discard := Check_All_Warnings (N); end; end if; end Remove_Warning_Messages; ---------------- -- Same_Error -- ---------------- function Same_Error (M1, M2 : Error_Msg_Id) return Boolean is Msg1 : constant String_Ptr := Errors.Table (M1).Text; Msg2 : constant String_Ptr := Errors.Table (M2).Text; Msg2_Len : constant Integer := Msg2'Length; Msg1_Len : constant Integer := Msg1'Length; begin return Msg1.all = Msg2.all or else (Msg1_Len - 10 > Msg2_Len and then Msg2.all = Msg1.all (1 .. Msg2_Len) and then Msg1 (Msg2_Len + 1 .. Msg2_Len + 10) = ", instance") or else (Msg2_Len - 10 > Msg1_Len and then Msg1.all = Msg2.all (1 .. Msg1_Len) and then Msg2 (Msg1_Len + 1 .. Msg1_Len + 10) = ", instance"); end Same_Error; ------------------- -- Set_Msg_Blank -- ------------------- procedure Set_Msg_Blank is begin if Msglen > 0 and then Msg_Buffer (Msglen) /= ' ' and then Msg_Buffer (Msglen) /= '(' and then not Manual_Quote_Mode then Set_Msg_Char (' '); end if; end Set_Msg_Blank; ------------------------------- -- Set_Msg_Blank_Conditional -- ------------------------------- procedure Set_Msg_Blank_Conditional is begin if Msglen > 0 and then Msg_Buffer (Msglen) /= ' ' and then Msg_Buffer (Msglen) /= '(' and then Msg_Buffer (Msglen) /= '"' and then not Manual_Quote_Mode then Set_Msg_Char (' '); end if; end Set_Msg_Blank_Conditional; ------------------ -- Set_Msg_Char -- ------------------ procedure Set_Msg_Char (C : Character) is begin -- The check for message buffer overflow is needed to deal with cases -- where insertions get too long (in particular a child unit name can -- be very long). if Msglen < Max_Msg_Length then Msglen := Msglen + 1; Msg_Buffer (Msglen) := C; end if; end Set_Msg_Char; ------------------------------ -- 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_File_Name -- --------------------------------- procedure Set_Msg_Insertion_File_Name is begin if Error_Msg_Name_1 = No_Name then null; elsif Error_Msg_Name_1 = Error_Name then Set_Msg_Blank; Set_Msg_Str (""); else Set_Msg_Blank; Get_Name_String (Error_Msg_Name_1); Set_Msg_Quote; Set_Msg_Name_Buffer; Set_Msg_Quote; end if; -- The following assignments ensure that the second and third percent -- insertion characters will correspond to the Error_Msg_Name_2 and -- Error_Msg_Name_3 as required. Error_Msg_Name_1 := Error_Msg_Name_2; Error_Msg_Name_2 := Error_Msg_Name_3; end Set_Msg_Insertion_File_Name; ----------------------------------- -- Set_Msg_Insertion_Line_Number -- ----------------------------------- procedure Set_Msg_Insertion_Line_Number (Loc, Flag : Source_Ptr) is Sindex_Loc : Source_File_Index; Sindex_Flag : Source_File_Index; begin Set_Msg_Blank; if Loc = No_Location then Set_Msg_Str ("at unknown location"); elsif Loc <= Standard_Location then Set_Msg_Str ("in package Standard"); if Loc = Standard_ASCII_Location then Set_Msg_Str (".ASCII"); end if; else -- Add "at file-name:" if reference is to other than the source -- file in which the error message is placed. Note that we check -- full file names, rather than just the source indexes, to -- deal with generic instantiations from the current file. Sindex_Loc := Get_Source_File_Index (Loc); Sindex_Flag := Get_Source_File_Index (Flag); if Full_File_Name (Sindex_Loc) /= Full_File_Name (Sindex_Flag) then Set_Msg_Str ("at "); Get_Name_String (Reference_Name (Get_Source_File_Index (Loc))); Set_Msg_Name_Buffer; Set_Msg_Char (':'); -- If in current file, add text "at line " else Set_Msg_Str ("at line "); end if; -- Output line number for reference Set_Msg_Int (Int (Get_Logical_Line_Number (Loc))); -- Deal with the instantiation case. We may have a reference to, -- e.g. a type, that is declared within a generic template, and -- what we are really referring to is the occurrence in an instance. -- In this case, the line number of the instantiation is also of -- interest, and we add a notation: -- , instance at xxx -- where xxx is a line number output using this same routine (and -- the recursion can go further if the instantiation is itself in -- a generic template). -- The flag location passed to us in this situation is indeed the -- line number within the template, but as described in Sinput.L -- (file sinput-l.ads, section "Handling Generic Instantiations") -- we can retrieve the location of the instantiation itself from -- this flag location value. -- Note: this processing is suppressed if Suppress_Instance_Location -- is set True. This is used to prevent redundant annotations of the -- location of the instantiation in the case where we are placing -- the messages on the instantiation in any case. if Instantiation (Sindex_Loc) /= No_Location and then not Suppress_Instance_Location then Set_Msg_Str (", instance "); Set_Msg_Insertion_Line_Number (Instantiation (Sindex_Loc), Flag); end if; end if; end Set_Msg_Insertion_Line_Number; ---------------------------- -- Set_Msg_Insertion_Name -- ---------------------------- procedure Set_Msg_Insertion_Name is begin if Error_Msg_Name_1 = No_Name then null; elsif Error_Msg_Name_1 = Error_Name then Set_Msg_Blank; Set_Msg_Str (""); else Set_Msg_Blank_Conditional; Get_Unqualified_Decoded_Name_String (Error_Msg_Name_1); -- Remove %s or %b at end. These come from unit names. If the -- caller wanted the (unit) or (body), then they would have used -- the $ insertion character. Certainly no error message should -- ever have %b or %s explicitly occurring. if Name_Len > 2 and then Name_Buffer (Name_Len - 1) = '%' and then (Name_Buffer (Name_Len) = 'b' or else Name_Buffer (Name_Len) = 's') then Name_Len := Name_Len - 2; end if; -- Remove upper case letter at end, again, we should not be getting -- such names, and what we hope is that the remainder makes sense. if Name_Len > 1 and then Name_Buffer (Name_Len) in 'A' .. 'Z' then Name_Len := Name_Len - 1; end if; -- If operator name or character literal name, just print it as is -- Also print as is if it ends in a right paren (case of x'val(nnn)) if Name_Buffer (1) = '"' or else Name_Buffer (1) = ''' or else Name_Buffer (Name_Len) = ')' then Set_Msg_Name_Buffer; -- Else output with surrounding quotes in proper casing mode else Set_Casing (Identifier_Casing (Flag_Source), Mixed_Case); Set_Msg_Quote; Set_Msg_Name_Buffer; Set_Msg_Quote; end if; end if; -- The following assignments ensure that the second and third percent -- insertion characters will correspond to the Error_Msg_Name_2 and -- Error_Msg_Name_3 as required. Error_Msg_Name_1 := Error_Msg_Name_2; Error_Msg_Name_2 := Error_Msg_Name_3; end Set_Msg_Insertion_Name; ---------------------------- -- Set_Msg_Insertion_Node -- ---------------------------- procedure Set_Msg_Insertion_Node is 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 (""); elsif Error_Msg_Node_1 = Error then Set_Msg_Blank; Set_Msg_Str (""); elsif Error_Msg_Node_1 = Standard_Void_Type then Set_Msg_Blank; Set_Msg_Str ("procedure name"); else Set_Msg_Blank_Conditional; -- Skip quotes for operator case if Nkind (Error_Msg_Node_1) in N_Op then Set_Msg_Node (Error_Msg_Node_1); 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_Reserved_Name -- ------------------------------------- procedure Set_Msg_Insertion_Reserved_Name is begin Set_Msg_Blank_Conditional; Get_Name_String (Error_Msg_Name_1); Set_Msg_Quote; Set_Casing (Keyword_Casing (Flag_Source), All_Lower_Case); Set_Msg_Name_Buffer; Set_Msg_Quote; end Set_Msg_Insertion_Reserved_Name; ------------------------------------- -- Set_Msg_Insertion_Reserved_Word -- ------------------------------------- procedure Set_Msg_Insertion_Reserved_Word (Text : String; J : in out Integer) is begin Set_Msg_Blank_Conditional; Name_Len := 0; while J <= Text'Last and then Text (J) in 'A' .. 'Z' loop Name_Len := Name_Len + 1; Name_Buffer (Name_Len) := Text (J); J := J + 1; end loop; Set_Casing (Keyword_Casing (Flag_Source), All_Lower_Case); Set_Msg_Quote; Set_Msg_Name_Buffer; Set_Msg_Quote; end Set_Msg_Insertion_Reserved_Word; -------------------------------------- -- 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_Uint -- ---------------------------- procedure Set_Msg_Insertion_Uint is begin Set_Msg_Blank; UI_Image (Error_Msg_Uint_1); for J in 1 .. UI_Image_Length loop Set_Msg_Char (UI_Image_Buffer (J)); end loop; -- The following assignment ensures that a second carret insertion -- character will correspond to the Error_Msg_Uint_2 parameter. Error_Msg_Uint_1 := Error_Msg_Uint_2; end Set_Msg_Insertion_Uint; --------------------------------- -- 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 (""); 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_Int -- ----------------- procedure Set_Msg_Int (Line : Int) is begin if Line > 9 then Set_Msg_Int (Line / 10); end if; Set_Msg_Char (Character'Val (Character'Pos ('0') + (Line rem 10))); end Set_Msg_Int; ------------------------- -- Set_Msg_Name_Buffer -- ------------------------- procedure Set_Msg_Name_Buffer is begin for J in 1 .. Name_Len loop Set_Msg_Char (Name_Buffer (J)); end loop; end Set_Msg_Name_Buffer; ------------------ -- 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; -- 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. if Src_Loc /= No_Location and then Src_Loc > Standard_Location then 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; end if; -- 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; Set_Msg_Name_Buffer; Add_Class; -- Add 'Class if class wide type if Class_Flag then Set_Msg_Char ('''); Get_Name_String (Name_Class); Set_Casing (Identifier_Casing (Flag_Source), Mixed_Case); Set_Msg_Name_Buffer; end if; end Set_Msg_Node; ------------------- -- Set_Msg_Quote -- ------------------- procedure Set_Msg_Quote is begin if not Manual_Quote_Mode then Set_Msg_Char ('"'); end if; end Set_Msg_Quote; ----------------- -- Set_Msg_Str -- ----------------- procedure Set_Msg_Str (Text : String) is begin for J in Text'Range loop Set_Msg_Char (Text (J)); end loop; end Set_Msg_Str; ------------------ -- 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 if C = '%' then Set_Msg_Insertion_Name; elsif C = '$' then Set_Msg_Insertion_Unit_Name; elsif C = '{' then Set_Msg_Insertion_File_Name; elsif C = '}' then Set_Msg_Insertion_Type_Reference (Flag); elsif C = '*' then Set_Msg_Insertion_Reserved_Name; elsif C = '&' then Set_Msg_Insertion_Node; elsif C = '#' then Set_Msg_Insertion_Line_Number (Error_Msg_Sloc, Flag); elsif C = '\' then Continuation := True; elsif C = '@' then Set_Msg_Insertion_Column; elsif C = '^' then Set_Msg_Insertion_Uint; elsif C = '`' then Manual_Quote_Mode := not Manual_Quote_Mode; Set_Msg_Char ('"'); elsif C = '!' then Is_Unconditional_Msg := True; elsif C = '?' then null; elsif C = '|' then null; elsif C = ''' then Set_Msg_Char (Text (P)); P := P + 1; -- Upper case letter (start of reserved word if 2 or more) elsif C in 'A' .. 'Z' and then P <= Text'Last and then Text (P) in 'A' .. 'Z' then P := P - 1; Set_Msg_Insertion_Reserved_Word (Text, P); -- Normal character with no special treatment else Set_Msg_Char (C); end if; end loop; end Set_Msg_Text; ------------------------------ -- Set_Next_Non_Deleted_Msg -- ------------------------------ procedure Set_Next_Non_Deleted_Msg (E : in out Error_Msg_Id) is begin if E = No_Error_Msg then return; else loop E := Errors.Table (E).Next; exit when E = No_Error_Msg or else not Errors.Table (E).Deleted; end loop; end if; end Set_Next_Non_Deleted_Msg; ---------------- -- Set_Posted -- ---------------- procedure Set_Posted (N : Node_Id) is P : Node_Id; begin -- 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 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; --------------------------- -- Set_Warnings_Mode_Off -- --------------------------- procedure Set_Warnings_Mode_Off (Loc : Source_Ptr) is begin -- Don't bother with entries from instantiation copies, since we -- will already have a copy in the template, which is what matters if Instantiation (Get_Source_File_Index (Loc)) /= No_Location then return; end if; -- If last entry in table already covers us, this is a redundant -- pragma Warnings (Off) and can be ignored. This also handles the -- case where all warnings are suppressed by command line switch. if Warnings.Last >= Warnings.First and then Warnings.Table (Warnings.Last).Start <= Loc and then Loc <= Warnings.Table (Warnings.Last).Stop then return; -- Otherwise establish a new entry, extending from the location of -- the pragma to the end of the current source file. This ending -- point will be adjusted by a subsequent pragma Warnings (On). else Warnings.Increment_Last; Warnings.Table (Warnings.Last).Start := Loc; Warnings.Table (Warnings.Last).Stop := Source_Last (Current_Source_File); end if; end Set_Warnings_Mode_Off; -------------------------- -- Set_Warnings_Mode_On -- -------------------------- procedure Set_Warnings_Mode_On (Loc : Source_Ptr) is begin -- Don't bother with entries from instantiation copies, since we -- will already have a copy in the template, which is what matters if Instantiation (Get_Source_File_Index (Loc)) /= No_Location then return; end if; -- Nothing to do unless command line switch to suppress all warnings -- is off, and the last entry in the warnings table covers this -- pragma Warnings (On), in which case adjust the end point. if (Warnings.Last >= Warnings.First and then Warnings.Table (Warnings.Last).Start <= Loc and then Loc <= Warnings.Table (Warnings.Last).Stop) and then Warning_Mode /= Suppress then Warnings.Table (Warnings.Last).Stop := Loc; end if; end Set_Warnings_Mode_On; ------------------------ -- 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; ------------------------------ -- Test_Warning_Serious_Msg -- ------------------------------ procedure Test_Warning_Msg (Msg : String) is begin Is_Serious_Error := True; if Msg'Length > 7 and then Msg (1 .. 7) = "(style)" then Is_Warning_Msg := True; else Is_Warning_Msg := False; end if; for J in Msg'Range loop if Msg (J) = '?' and then (J = Msg'First or else Msg (J - 1) /= ''') then Is_Warning_Msg := True; elsif Msg (J) = '|' and then (J = Msg'First or else Msg (J - 1) /= ''') then Is_Serious_Error := False; end if; end loop; if Is_Warning_Msg then Is_Serious_Error := False; end if; end Test_Warning_Msg; -------------------------- -- 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; ------------------------- -- Warnings_Suppressed -- ------------------------- function Warnings_Suppressed (Loc : Source_Ptr) return Boolean is begin for J in Warnings.First .. Warnings.Last loop if Warnings.Table (J).Start <= Loc and then Loc <= Warnings.Table (J).Stop then return True; end if; end loop; return False; end Warnings_Suppressed; end Errout;