gcc/ada/libgnat/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       --
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   9 --                     Copyright (C) 1998-2024, AdaCore                     --
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  19 -- additional permissions described in the GCC Runtime Library Exception,   --
  20 -- version 3.1, as published by the Free Software Foundation.               --
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  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
  40 package GNAT.Spelling_Checker_Generic is
  41    pragma Pure;
  42
  43    generic
  44       type Char_Type is (<>);
  45       --  See above for restrictions on what types can be used here
  46
  47       type String_Type is array (Positive range <>) of Char_Type;
  48
  49    function Is_Bad_Spelling_Of
  50      (Found  : String_Type;
  51       Expect : String_Type) return Boolean;
  52    --  Determines if the string Found is a plausible misspelling of the string
  53    --  Expect. Returns True for an exact match or a probably misspelling, False
  54    --  if no near match is detected. This routine is case sensitive, so the
  55    --  caller should fold both strings to get a case insensitive match if the
  56    --  character encoding represents upper/lower case.
  57    --
  58    --  Note: the spec of this routine is deliberately rather vague. This
  59    --  routine is the one used by GNAT itself to detect misspelled keywords
  60    --  and identifiers, and is heuristically adjusted to be appropriate to
  61    --  this usage. It will work well in any similar case of named entities.
  62
  63 end GNAT.Spelling_Checker_Generic;