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1 706 jeremybenn
------------------------------------------------------------------------------
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--                                                                          --
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--                         GNAT COMPILER COMPONENTS                         --
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--                                                                          --
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--                             E R R _ V A R S                              --
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--                                                                          --
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--                                 S p e c                                  --
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--                                                                          --
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--          Copyright (C) 1992-2011, Free Software Foundation, Inc.         --
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--                                                                          --
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-- GNAT is free software;  you can  redistribute it  and/or modify it under --
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-- terms of the  GNU General Public License as published  by the Free Soft- --
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-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
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-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License --
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-- for  more details.  You should have  received  a copy of the GNU General --
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-- Public License  distributed with GNAT; see file COPYING3.  If not, go to --
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-- http://www.gnu.org/licenses for a complete copy of the license.          --
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--                                                                          --
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-- GNAT was originally developed  by the GNAT team at  New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc.      --
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--                                                                          --
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------------------------------------------------------------------------------
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--  This package contains variables common to error reporting packages
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--  including Errout and Prj.Err.
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with Namet; use Namet;
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with Types; use Types;
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with Uintp; use Uintp;
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package Err_Vars is
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   --  All of these variables are set when needed, so they do not need to be
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   --  initialized. However, there is code that saves and restores existing
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   --  values, which may malfunction in -gnatVa mode if the variable has never
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   --  been initialized, so we initialize some variables to avoid exceptions
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   --  from invalid values in such cases.
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   ------------------
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   -- Error Counts --
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   ------------------
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   Serious_Errors_Detected : Nat := 0;
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   --  This is a count of errors that are serious enough to stop expansion,
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   --  and hence to prevent generation of an object file even if the
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   --  switch -gnatQ is set. Initialized to zero at the start of compilation.
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   --  Initialized for -gnatVa use, see comment above.
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   Total_Errors_Detected : Nat := 0;
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   --  Number of errors detected so far. Includes count of serious errors and
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   --  non-serious errors, so this value is always greater than or equal to the
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   --  Serious_Errors_Detected value. Initialized to zero at the start of
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   --  compilation. Initialized for -gnatVa use, see comment above.
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   Warnings_Detected : Nat := 0;
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   --  Number of warnings detected. Initialized to zero at the start of
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   --  compilation. Initialized for -gnatVa use, see comment above.
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   ----------------------------------
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   -- Error Message Mode Variables --
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   ----------------------------------
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   --  These variables control special error message modes. The initialized
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   --  values below give the normal default behavior, but they can be reset
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   --  by the caller to get different behavior as noted in the comments. These
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   --  variables are not reset by calls to the error message routines, so the
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   --  caller is responsible for resetting the default behavior after use.
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   Error_Msg_Qual_Level : Int;
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   --  Number of levels of qualification required for type name (see the
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   --  description of the } insertion character. Note that this value does
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   --  note get reset by any Error_Msg call, so the caller is responsible
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   --  for resetting it.
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   Warn_On_Instance : Boolean := False;
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   --  Normally if a warning is generated in a generic template from the
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   --  analysis of the template, then the warning really belongs in the
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   --  template, and the default value of False for this Boolean achieves
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   --  that effect. If Warn_On_Instance is set True, then the warnings are
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   --  generated on the instantiation (referring to the template) rather
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   --  than on the template itself.
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   Raise_Exception_On_Error : Nat := 0;
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   --  If this value is non-zero, then any attempt to generate an error
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   --  message raises the exception Error_Msg_Exception, and the error
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   --  message is not output. This is used for defending against junk
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   --  resulting from illegalities, and also for substitution of more
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   --  appropriate error messages from higher semantic levels. It is
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   --  a counter so that the increment/decrement protocol nests neatly.
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   --  Initialized for -gnatVa use, see comment above.
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   Error_Msg_Exception : exception;
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   --  Exception raised if Raise_Exception_On_Error is true
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   Current_Error_Source_File : Source_File_Index := Internal_Source_File;
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   --  Id of current messages. Used to post file name when unit changes. This
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   --  is initialized to Main_Source_File at the start of a compilation, which
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   --  means that no file names will be output unless there are errors in units
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   --  other than the main unit. However, if the main unit has a pragma
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   --  Source_Reference line, then this is initialized to No_Source_File,
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   --  to force an initial reference to the real source file name.
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   ----------------------------------------
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   -- Error Message Insertion Parameters --
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   ----------------------------------------
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   --  The error message routines work with strings that contain insertion
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   --  sequences that result in the insertion of variable data. The following
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   --  variables contain the required data. The procedure is to set one or more
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   --  of the following global variables to appropriate values before making a
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   --  call to one of the error message routines with a string containing the
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   --  insertion character to get the value inserted in an appropriate format.
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   Error_Msg_Col : Column_Number;
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   --  Column for @ insertion character in message
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   Error_Msg_Uint_1 : Uint;
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   Error_Msg_Uint_2 : Uint;
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   --  Uint values for ^ insertion characters in message
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   Error_Msg_Sloc : Source_Ptr;
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   --  Source location for # insertion character in message
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   Error_Msg_Name_1 : Name_Id;
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   Error_Msg_Name_2 : Name_Id;
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   Error_Msg_Name_3 : Name_Id;
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   --  Name_Id values for % insertion characters in message
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   Error_Msg_File_1 : File_Name_Type;
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   Error_Msg_File_2 : File_Name_Type;
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   Error_Msg_File_3 : File_Name_Type;
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   --  File_Name_Type values for { insertion characters in message
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   Error_Msg_Unit_1 : Unit_Name_Type;
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   Error_Msg_Unit_2 : Unit_Name_Type;
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   --  Unit_Name_Type values for $ insertion characters in message
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   Error_Msg_Node_1 : Node_Id;
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   Error_Msg_Node_2 : Node_Id;
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   --  Node_Id values for & insertion characters in message
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   Error_Msg_Warn : Boolean;
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   --  Used if current message contains a < insertion character to indicate
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   --  if the current message is a warning message. Must be set appropriately
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   --  before any call to Error_Msg_xxx with a < insertion character present.
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   --  Setting is irrelevant if no < insertion character is present. Note
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   --  that it is not necessary to reset this after using it, since the proper
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   --  procedure is always to set it before issuing such a message.
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   Error_Msg_String : String (1 .. 4096);
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   Error_Msg_Strlen : Natural;
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   --  Used if current message contains a ~ insertion character to indicate
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   --  insertion of the string Error_Msg_String (1 .. Error_Msg_Strlen).
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end Err_Vars;

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