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

--                                                                          --

--                         GNAT COMPILER COMPONENTS                         --

--                                                                          --

--                               C A S I N G                                --

--                                                                          --

--                                 S p e c                                  --

--                                                                          --

--         Copyright (C) 1992-2009  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.                                     --

--                                                                          --

-- As a special exception under Section 7 of GPL version 3, you are granted --

-- additional permissions described in the GCC Runtime Library Exception,   --

-- version 3.1, as published by the Free Software Foundation.               --

--                                                                          --

-- You should have received a copy of the GNU General Public License and    --

-- a copy of the GCC Runtime Library Exception along with this program;     --

-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --

-- <http://www.gnu.org/licenses/>.                                          --

--                                                                          --

-- GNAT was originally developed  by the GNAT team at  New York University. --

-- Extensive contributions were provided by Ada Core Technologies Inc.      --

--                                                                          --

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

with Types; use Types;

package Casing is

   --  This package contains data and subprograms to support the feature that

   --  recognizes the letter case styles used in the source program being

   --  compiled, and uses this information for error message formatting, and

   --  for recognizing reserved words that are misused as identifiers.

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

   -- Case Control Declarations --

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

   --  Declaration of type for describing casing convention

   type Casing_Type is (

      All_Upper_Case,

      --  All letters are upper case

      All_Lower_Case,

      --  All letters are lower case

      Mixed_Case,

      --  The initial letter, and any letters after underlines are upper case.

      --  All other letters are lower case

      Unknown

      --  Used if an identifier does not distinguish between the above cases,

      --  (e.g. X, Y_3, M4, A_B, or if it is inconsistent ABC_def).

   );

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

   -- Case Control Subprograms --

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

   procedure Set_Casing (C : Casing_Type; D : Casing_Type := Mixed_Case);

   --  Takes the name stored in the first Name_Len positions of Name_Buffer

   --  and modifies it to be consistent with the casing given by C, or if

   --  C = Unknown, then with the casing given by D. The name is basically

   --  treated as an identifier, except that special separator characters

   --  other than underline are permitted and treated like underlines (this

   --  handles cases like minus and period in unit names, apostrophes in error

   --  messages, angle brackets in names like <any_type>, etc).

   procedure Set_All_Upper_Case;

   pragma Inline (Set_All_Upper_Case);

   --  This procedure is called with an identifier name stored in Name_Buffer.

   --  On return, the identifier is converted to all upper case. The call is

   --  equivalent to Set_Casing (All_Upper_Case).

   function Determine_Casing (Ident : Text_Buffer) return Casing_Type;

   --  Determines the casing of the identifier/keyword string Ident

end Casing;