1------------------------------------------------------------------------------
2--                                                                          --
3--                         GNAT RUN-TIME COMPONENTS                         --
4--                                                                          --
5--          G N A T . S P E L L I N G _ C H E C K E R _ G E N E R I C       --
6--                                                                          --
7--                                 S p e c                                  --
8--                                                                          --
9--                     Copyright (C) 1998-2010, AdaCore                     --
10--                                                                          --
11-- GNAT is free software;  you can  redistribute it  and/or modify it under --
12-- terms of the  GNU General Public License as published  by the Free Soft- --
13-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
14-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
15-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
16-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
17--                                                                          --
18-- As a special exception under Section 7 of GPL version 3, you are granted --
19-- additional permissions described in the GCC Runtime Library Exception,   --
20-- version 3.1, as published by the Free Software Foundation.               --
21--                                                                          --
22-- You should have received a copy of the GNU General Public License and    --
23-- a copy of the GCC Runtime Library Exception along with this program;     --
24-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
25-- <http://www.gnu.org/licenses/>.                                          --
26--                                                                          --
27-- GNAT was originally developed  by the GNAT team at  New York University. --
28-- Extensive contributions were provided by Ada Core Technologies Inc.      --
29--                                                                          --
30------------------------------------------------------------------------------
31
32--  Spelling checker
33
34--  This package provides a utility generic routine for checking for bad
35--  spellings. This routine must be instantiated with an appropriate array
36--  element type, which must represent a character encoding in which the
37--  codes for ASCII characters in the range 16#20#..16#7F# have their normal
38--  expected encoding values (e.g. the Pos value 16#31# must be digit 1).
39
40pragma Compiler_Unit;
41
42package GNAT.Spelling_Checker_Generic is
43   pragma Pure;
44
45   generic
46      type Char_Type is (<>);
47      --  See above for restrictions on what types can be used here
48
49      type String_Type is array (Positive range <>) of Char_Type;
50
51   function Is_Bad_Spelling_Of
52     (Found  : String_Type;
53      Expect : String_Type) return Boolean;
54   --  Determines if the string Found is a plausible misspelling of the string
55   --  Expect. Returns True for an exact match or a probably misspelling, False
56   --  if no near match is detected. This routine is case sensitive, so the
57   --  caller should fold both strings to get a case insensitive match if the
58   --  character encoding represents upper/lower case.
59   --
60   --  Note: the spec of this routine is deliberately rather vague. This
61   --  routine is the one used by GNAT itself to detect misspelled keywords
62   --  and identifiers, and is heuristically adjusted to be appropriate to
63   --  this usage. It will work well in any similar case of named entities.
64
65end GNAT.Spelling_Checker_Generic;
66