1------------------------------------------------------------------------------
2--                                                                          --
3--                         GNAT LIBRARY COMPONENTS                          --
4--                                                                          --
5--              ADA.CONTAINERS.GENERIC_ANONYMOUS_ARRAY_SORT                 --
6--                                                                          --
7--                                 S p e c                                  --
8--                                                                          --
9--          Copyright (C) 2004-2020, Free Software Foundation, Inc.         --
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-- This unit was originally developed by Matthew J Heaney.                  --
28------------------------------------------------------------------------------
29
30--  Allows an anonymous array (or array-like container) to be sorted. Generic
31--  formal Less returns the result of comparing the elements designated by the
32--  indexes, and generic formal Swap exchanges the designated elements.
33
34generic
35   type Index_Type is (<>);
36   with function Less (Left, Right : Index_Type) return Boolean is <>;
37   with procedure Swap (Left, Right : Index_Type) is <>;
38
39procedure Ada.Containers.Generic_Anonymous_Array_Sort
40  (First, Last : Index_Type'Base);
41pragma Pure (Ada.Containers.Generic_Anonymous_Array_Sort);
42--  Reorders the elements of Container such that the elements are sorted
43--  smallest first as determined by the generic formal "<" operator provided.
44--  Any exception raised during evaluation of "<" is propagated.
45--
46--  The actual function for the generic formal function "<" is expected to
47--  return the same value each time it is called with a particular pair of
48--  element values. It should not modify Container and it should define a
49--  strict weak ordering relationship: irreflexive, asymmetric, transitive, and
50--  in addition, if x < y for any values x and y, then for all other values z,
51--  (x < z) or (z < y).  If the actual for "<" behaves in some other manner,
52--  the behavior of the instance of Generic_Anonymous_Array_Sort is
53--  unspecified. The number of times Generic_Anonymous_Array_Sort calls "<" is
54--  unspecified.
55