gcc/ada/g-spchge.ads

   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) 1998-2007, AdaCore                     --
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  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
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  20 -- Boston, MA 02110-1301, USA.                                              --
  21 --                                                                          --
  22 -- As a special exception,  if other files  instantiate  generics from this --
  23 -- unit, or you link  this unit with other files  to produce an executable, --
  24 -- this  unit  does not  by itself cause  the resulting  executable  to  be --
  25 -- covered  by the  GNU  General  Public  License.  This exception does not --
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  27 -- covered by the  GNU Public License.                                      --
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  29 -- GNAT was originally developed  by the GNAT team at  New York University. --
  30 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  31 --                                                                          --
  32 ------------------------------------------------------------------------------
  33
  34 --  Spelling checker
  35
  36 --  This package provides a utility generic routine for checking for bad
  37 --  spellings. This routine must be instantiated with an appropriate array
  38 --  element type, which must represent a character encoding in which the
  39 --  codes for ASCII characters in the range 16#20#..16#7F# have their normal
  40 --  expected encoding values (e.g. the Pos value 16#31# must be digit 1).
  41
  42 pragma Warnings (Off);
  43 pragma Compiler_Unit;
  44 pragma Warnings (On);
  45
  46 package GNAT.Spelling_Checker_Generic is
  47    pragma Pure;
  48
  49    generic
  50       type Char_Type is (<>);
  51       --  See above for restrictions on what types can be used here
  52
  53       type String_Type is array (Positive range <>) of Char_Type;
  54
  55    function Is_Bad_Spelling_Of
  56      (Found  : String_Type;
  57       Expect : String_Type) return Boolean;
  58    --  Determines if the string Found is a plausible misspelling of the string
  59    --  Expect. Returns True for an exact match or a probably misspelling, False
  60    --  if no near match is detected. This routine is case sensitive, so the
  61    --  caller should fold both strings to get a case insensitive match if the
  62    --  character encoding represents upper/lower case.
  63    --
  64    --  Note: the spec of this routine is deliberately rather vague. This
  65    --  routine is the one used by GNAT itself to detect misspelled keywords
  66    --  and identifiers, and is heuristically adjusted to be appropriate to
  67    --  this usage. It will work well in any similar case of named entities.
  68
  69 end GNAT.Spelling_Checker_Generic;