New Language: Ada

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@45954 138bc75d-0d04-0410-961f-82ee72b054a4

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+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                               C A S I N G                                --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--                            $Revision: 1.12 $
+--                                                                          --
+--          Copyright (C) 1992-2000 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.                                                      --
+--                                                                          --
+-- As a special exception,  if other files  instantiate  generics from this --
+-- unit, or you link  this unit with other files  to produce an executable, --
+-- this  unit  does not  by itself cause  the resulting  executable  to  be --
+-- covered  by the  GNU  General  Public  License.  This exception does not --
+-- however invalidate  any other reasons why  the executable file  might be --
+-- covered by the  GNU Public License.                                      --
+--                                                                          --
+-- 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). --
+--                                                                          --
+------------------------------------------------------------------------------
+
+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;