-- --
-- S p e c --
-- --
--- Copyright (C) 1992-2007, Free Software Foundation, Inc. --
+-- Copyright (C) 1992-2008, 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- --
+-- ware Foundation; either version 3, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
-- for more details. You should have received a copy of the GNU General --
--- Public License distributed with GNAT; see file COPYING. If not, write --
--- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
--- Boston, MA 02110-1301, USA. --
+-- Public License distributed with GNAT; see file COPYING3. If not, go to --
+-- http://www.gnu.org/licenses for a complete copy of the license. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- type, and is used by Add_Class to insert 'Class at the proper point
Continuation : Boolean := False;
- -- Indicates if current message is a continuation. Intialized from the
+ -- 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.
Is_Style_Msg : Boolean := False;
-- Set True to indicate if the current message is a style message
+ -- (i.e. a message whose text starts with the characters "(style)").
Is_Serious_Error : Boolean := False;
-- Set by Set_Msg_Text to indicate if current message is serious error
Max_Msg_Length : constant := 1024 + 2 * Int (Column_Number'Last);
-- Maximum length of error message. The addition of 2 * Column_Number'Last
- -- ensures that two insertion tokens of maximum length can be accomodated.
+ -- ensures that two insertion tokens of maximum length can be accommodated.
-- The value of 1024 is an arbitrary value that should be more than long
- -- enough to accomodate any reasonable message (and for that matter, some
+ -- enough to accommodate any reasonable message (and for that matter, some
-- pretty unreasonable messages!)
Msg_Buffer : String (1 .. Max_Msg_Length);
No_Error_Msg : constant Error_Msg_Id := 0;
-- A constant which is different from any value returned by Get_Error_Id.
- -- Typically used by a client to indicate absense of a saved Id value.
+ -- Typically used by a client to indicate absence of a saved Id value.
Cur_Msg : Error_Msg_Id := No_Error_Msg;
-- Id of most recently posted error message
-- 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
+ -- If all warnings are suppressed by command 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
Start : Source_Ptr;
Stop : Source_Ptr;
-- Starting and ending source pointers for the range. These are always
- -- from the same source file. Start is set to No_Location for the case
- -- of a configuration pragma.
+ -- from the same source file.
Msg : String_Ptr;
-- Message from pragma Warnings (Off, string)
- Pattern : String_Ptr;
- -- Same as Msg, excluding initial and final asterisks if present. The
- -- lower bound of this string is always one.
-
- Patlen : Natural;
- -- Length of pattern string (excluding initial/final asterisks)
-
Open : Boolean;
- -- Set to True if OFF has been encountered with no matchin ON
+ -- Set to True if OFF has been encountered with no matching ON
Used : Boolean;
-- Set to True if entry has been used to suppress a warning
- Star_Start : Boolean;
- -- True if given pattern had * at start
-
- Star_End : Boolean;
- -- True if given pattern had * at end
-
+ Config : Boolean;
+ -- True if pragma is configuration pragma (in which case no matching
+ -- Off pragma is required, and it is not required that a specific
+ -- warning be suppressed).
end record;
package Specific_Warnings is new Table.Table (
Table_Increment => 200,
Table_Name => "Specific_Warnings");
+ -- Note on handling configuration case versus specific case. A complication
+ -- arises from this example:
+
+ -- pragma Warnings (Off, "not referenced*");
+ -- procedure Mumble (X : Integer) is
+ -- pragma Warnings (On, "not referenced*");
+ -- begin
+ -- null;
+ -- end Mumble;
+
+ -- The trouble is that the first pragma is technically a configuration
+ -- pragma, and yet it is clearly being used in the context of thinking
+ -- of it as a specific case. To deal with this, what we do is that the
+ -- On entry can match a configuration pragma from the same file, and if
+ -- we find such an On entry, we cancel the indication of it being the
+ -- configuration case. This seems to handle all cases we run into ok.
+
-----------------
-- Subprograms --
-----------------
-- the input value of E was either already No_Error_Msg, or was the
-- last non-deleted message.
- procedure Set_Specific_Warning_Off (Loc : Source_Ptr; Msg : String);
+ procedure Set_Specific_Warning_Off
+ (Loc : Source_Ptr;
+ Msg : String;
+ Config : Boolean);
-- This is called in response to the two argument form of pragma Warnings
- -- where the first argument is OFF, and the second argument is the prefix
- -- of a specific warning to be suppressed. The first argument is the start
- -- of the suppression range, and the second argument is the string from
- -- the pragma. Loc is set to No_Location for the configuration pragma case.
+ -- where the first argument is OFF, and the second argument is a string
+ -- which identifies a specific warning to be suppressed. The first argument
+ -- is the start of the suppression range, and the second argument is the
+ -- string from the pragma. Loc is the location of the pragma (which is the
+ -- start of the range to suppress). Config is True for the configuration
+ -- pragma case (where there is no requirement for a matching OFF pragma).
procedure Set_Specific_Warning_On
(Loc : Source_Ptr;
Msg : String;
Err : out Boolean);
-- This is called in response to the two argument form of pragma Warnings
- -- where the first argument is ON, and the second argument is the prefix
- -- of a specific warning to be suppressed. The first argument is the end
- -- of the suppression range, and the second argument is the string from
- -- the pragma. Err is set to True on return to report the error of no
- -- matching Warnings Off pragma preceding this one.
+ -- where the first argument is ON, and the second argument is a string
+ -- which identifies a specific warning to be suppressed. The first argument
+ -- is the end of the suppression range, and the second argument is the
+ -- string from the pragma. Err is set to True on return to report the error
+ -- of no matching Warnings Off pragma preceding this one.
procedure Set_Warnings_Mode_Off (Loc : Source_Ptr);
-- Called in response to a pragma Warnings (Off) to record the source
procedure Test_Style_Warning_Serious_Msg (Msg : String);
-- Sets Is_Warning_Msg true if Msg is a warning message (contains a
- -- question mark character), and False otherwise. Sets Is_Style_Msg
- -- true if Msg is a style message (starts with "(style)"). Sets
- -- Is_Serious_Error True unless the message is a warning or style
- -- message or contains the character | indicating a non-serious
- -- error message. Note that the call has no effect for continuation
- -- messages (those whose first character is \).
+ -- question mark character), and False otherwise. Is_Style_Msg is set true
+ -- if Msg is a style message (starts with "(style)". Sets Is_Serious_Error
+ -- True unless the message is a warning or style/info message or contains
+ -- the character | indicating a non-serious error message. Note that the
+ -- call has no effect for continuation messages (those whose first
+ -- character is '\').
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). This routine
- -- only deals with the general ON/OFF case, not specific warnings
+ -- only deals with the general ON/OFF case, not specific warnings. True
+ -- is also returned if warnings are globally suppressed.
function Warning_Specifically_Suppressed
(Loc : Source_Ptr;
OSDN Git Service
