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------------------------------------------------------------------------------

--                                                                          --

--                         GNAT COMPILER COMPONENTS                         --

--                                                                          --

--                             E R R _ V A R S                              --

--                                                                          --

--                                 S p e c                                  --

--                                                                          --

--          Copyright (C) 1992-2011, 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 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 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.      --

--                                                                          --

------------------------------------------------------------------------------

--  This package contains variables common to error reporting packages

--  including Errout and Prj.Err.

with Namet; use Namet;

with Types; use Types;

with Uintp; use Uintp;

package Err_Vars is

   --  All of these variables are set when needed, so they do not need to be

   --  initialized. However, there is code that saves and restores existing

   --  values, which may malfunction in -gnatVa mode if the variable has never

   --  been initialized, so we initialize some variables to avoid exceptions

   --  from invalid values in such cases.

   ------------------

   -- Error Counts --

   ------------------

   Serious_Errors_Detected : Nat := 0;

   --  This is a count of errors that are serious enough to stop expansion,

   --  and hence to prevent generation of an object file even if the

   --  switch -gnatQ is set. Initialized to zero at the start of compilation.

   --  Initialized for -gnatVa use, see comment above.

   Total_Errors_Detected : Nat := 0;

   --  Number of errors detected so far. Includes count of serious errors and

   --  non-serious errors, so this value is always greater than or equal to the

   --  Serious_Errors_Detected value. Initialized to zero at the start of

   --  compilation. Initialized for -gnatVa use, see comment above.

   Warnings_Detected : Nat := 0;

   --  Number of warnings detected. Initialized to zero at the start of

   --  compilation. Initialized for -gnatVa use, see comment above.

   ----------------------------------

   -- Error Message Mode Variables --

   ----------------------------------

   --  These variables control special error message modes. The initialized

   --  values below give the normal default behavior, but they can be reset

   --  by the caller to get different behavior as noted in the comments. These

   --  variables are not reset by calls to the error message routines, so the

   --  caller is responsible for resetting the default behavior after use.

   Error_Msg_Qual_Level : Int;

   --  Number of levels of qualification required for type name (see the

   --  description of the } insertion character. Note that this value does

   --  note get reset by any Error_Msg call, so the caller is responsible

   --  for resetting it.

   Warn_On_Instance : Boolean := False;

   --  Normally if a warning is generated in a generic template from the

   --  analysis of the template, then the warning really belongs in the

   --  template, and the default value of False for this Boolean achieves

   --  that effect. If Warn_On_Instance is set True, then the warnings are

   --  generated on the instantiation (referring to the template) rather

   --  than on the template itself.

   Raise_Exception_On_Error : Nat := 0;

   --  If this value is non-zero, then any attempt to generate an error

   --  message raises the exception Error_Msg_Exception, and the error

   --  message is not output. This is used for defending against junk

   --  resulting from illegalities, and also for substitution of more

   --  appropriate error messages from higher semantic levels. It is

   --  a counter so that the increment/decrement protocol nests neatly.

   --  Initialized for -gnatVa use, see comment above.

   Error_Msg_Exception : exception;

   --  Exception raised if Raise_Exception_On_Error is true

   Current_Error_Source_File : Source_File_Index := Internal_Source_File;

   --  Id of current messages. Used to post file name when unit changes. This

   --  is initialized to Main_Source_File at the start of a compilation, which

   --  means that no file names will be output unless there are errors in units

   --  other than the main unit. However, if the main unit has a pragma

   --  Source_Reference line, then this is initialized to No_Source_File,

   --  to force an initial reference to the real source file name.

   ----------------------------------------

   -- Error Message Insertion Parameters --

   ----------------------------------------

   --  The error message routines work with strings that contain insertion

   --  sequences that result in the insertion of variable data. The following

   --  variables contain the required data. The procedure is to set one or more

   --  of the following global variables to appropriate values before making a

   --  call to one of the error message routines with a string containing the

   --  insertion character to get the value inserted in an appropriate format.

   Error_Msg_Col : Column_Number;

   --  Column for @ insertion character in message

   Error_Msg_Uint_1 : Uint;

   Error_Msg_Uint_2 : Uint;

   --  Uint values for ^ insertion characters in message

   Error_Msg_Sloc : Source_Ptr;

   --  Source location for # insertion character in message

   Error_Msg_Name_1 : Name_Id;

   Error_Msg_Name_2 : Name_Id;

   Error_Msg_Name_3 : Name_Id;

   --  Name_Id values for % insertion characters in message

   Error_Msg_File_1 : File_Name_Type;

   Error_Msg_File_2 : File_Name_Type;

   Error_Msg_File_3 : File_Name_Type;

   --  File_Name_Type values for { insertion characters in message

   Error_Msg_Unit_1 : Unit_Name_Type;

   Error_Msg_Unit_2 : Unit_Name_Type;

   --  Unit_Name_Type values for $ insertion characters in message

   Error_Msg_Node_1 : Node_Id;

   Error_Msg_Node_2 : Node_Id;

   --  Node_Id values for & insertion characters in message

   Error_Msg_Warn : Boolean;

   --  Used if current message contains a < insertion character to indicate

   --  if the current message is a warning message. Must be set appropriately

   --  before any call to Error_Msg_xxx with a < insertion character present.

   --  Setting is irrelevant if no < insertion character is present. Note

   --  that it is not necessary to reset this after using it, since the proper

   --  procedure is always to set it before issuing such a message.

   Error_Msg_String : String (1 .. 4096);

   Error_Msg_Strlen : Natural;

   --  Used if current message contains a ~ insertion character to indicate

   --  insertion of the string Error_Msg_String (1 .. Error_Msg_Strlen).

end Err_Vars;