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------------------------------------------------------------------------------
-- --
-- GNAT COMPILER COMPONENTS --
-- --
-- E R R O U T --
-- --
-- B o d y --
-- --
-- $Revision: 1.4 $
-- --
-- Copyright (C) 1992-2001 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 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_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)
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.
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).
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
Errors_Detected := Errors_Detected - 1;
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 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 (" 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 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_Fatal_Error;
-- Internal procedure to do all error message handling other than
-- bumping the error count and arranging for the message to be output.
procedure Handle_Fatal_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 parser 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_Fatal_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 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
Handle_Fatal_Error;
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).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
Errors_Detected := Errors_Detected + 1;
Handle_Fatal_Error;
end if;
-- Terminate if max errors reached
if 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
if No_Warnings (N) 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 := N;
Error_Msg (Msg, Sloc (N));
else
Last_Killed := True;
end if;
if not Is_Warning_Msg then
Set_Posted (N);
end if;
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
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, Sloc (N));
else
Last_Killed := True;
end if;
if not Is_Warning_Msg then
Set_Posted (N);
end if;
end Error_Msg_NE;
-----------------
-- 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 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 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 Errors_Detected = 0 then
Write_Str ("No errors");
elsif Errors_Detected = 1 then
Write_Str ("1 error");
else
Write_Int (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 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
Errors_Detected := 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;
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
Errors_Detected := Errors_Detected - 1;
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
then
-- Warnings may have been posted on subexpressions of
-- the original tree. We temporarily replace the raise
-- statement with the original expression to remove
-- those warnings, whose sloc do not match those of
-- any node in the current tree.
declare
Old : Node_Id := N;
Status : Traverse_Result;
begin
Rewrite (N, Original_Node (N));
Status := Check_For_Warning (N);
Rewrite (N, Old);
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 ("<error>");
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 ("<error>");
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 ("<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;
-- 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 ("<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_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
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;
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;
----------------------
-- Test_Warning_Msg --
----------------------
procedure Test_Warning_Msg (Msg : String) is
begin
if Msg'Length > 7 and then Msg (1 .. 7) = "(style)" then
Is_Warning_Msg := True;
return;
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;
return;
end if;
end loop;
Is_Warning_Msg := False;
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;