1 ------------------------------------------------------------------------------
3 -- GNAT LIBRARY COMPONENTS --
5 -- A D A . C O N T A I N E R S . D O U B L Y _ L I N K E D _ L I S T S --
9 -- Copyright (C) 2004-2011, Free Software Foundation, Inc. --
11 -- This specification is derived from the Ada Reference Manual for use with --
12 -- GNAT. The copyright notice above, and the license provisions that follow --
13 -- apply solely to the contents of the part following the private keyword. --
15 -- GNAT is free software; you can redistribute it and/or modify it under --
16 -- terms of the GNU General Public License as published by the Free Soft- --
17 -- ware Foundation; either version 3, or (at your option) any later ver- --
18 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
19 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
20 -- or FITNESS FOR A PARTICULAR PURPOSE. --
22 -- As a special exception under Section 7 of GPL version 3, you are granted --
23 -- additional permissions described in the GCC Runtime Library Exception, --
24 -- version 3.1, as published by the Free Software Foundation. --
26 -- You should have received a copy of the GNU General Public License and --
27 -- a copy of the GCC Runtime Library Exception along with this program; --
28 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
29 -- <http://www.gnu.org/licenses/>. --
31 -- This unit was originally developed by Matthew J Heaney. --
32 ------------------------------------------------------------------------------
34 private with Ada.Finalization;
36 with Ada.Streams; use Ada.Streams;
37 with Ada.Iterator_Interfaces;
40 type Element_Type is private;
42 with function "=" (Left, Right : Element_Type)
45 package Ada.Containers.Doubly_Linked_Lists is
49 type List is tagged private
51 Constant_Indexing => Constant_Reference,
52 Variable_Indexing => Reference,
53 Default_Iterator => Iterate,
54 Iterator_Element => Element_Type;
56 pragma Preelaborable_Initialization (List);
58 type Cursor is private;
59 pragma Preelaborable_Initialization (Cursor);
61 Empty_List : constant List;
63 No_Element : constant Cursor;
64 function Has_Element (Position : Cursor) return Boolean;
66 package List_Iterator_Interfaces is new
67 Ada.Iterator_Interfaces (Cursor, Has_Element);
69 function "=" (Left, Right : List) return Boolean;
71 function Length (Container : List) return Count_Type;
73 function Is_Empty (Container : List) return Boolean;
75 procedure Clear (Container : in out List);
77 function Element (Position : Cursor) return Element_Type;
79 procedure Replace_Element
80 (Container : in out List;
82 New_Item : Element_Type);
84 procedure Query_Element
86 Process : not null access procedure (Element : Element_Type));
88 procedure Update_Element
89 (Container : in out List;
91 Process : not null access procedure (Element : in out Element_Type));
93 procedure Assign (Target : in out List; Source : List);
95 function Copy (Source : List) return List;
98 (Target : in out List;
99 Source : in out List);
102 (Container : in out List;
104 New_Item : Element_Type;
105 Count : Count_Type := 1);
108 (Container : in out List;
110 New_Item : Element_Type;
111 Position : out Cursor;
112 Count : Count_Type := 1);
115 (Container : in out List;
117 Position : out Cursor;
118 Count : Count_Type := 1);
121 (Container : in out List;
122 New_Item : Element_Type;
123 Count : Count_Type := 1);
126 (Container : in out List;
127 New_Item : Element_Type;
128 Count : Count_Type := 1);
131 (Container : in out List;
132 Position : in out Cursor;
133 Count : Count_Type := 1);
135 procedure Delete_First
136 (Container : in out List;
137 Count : Count_Type := 1);
139 procedure Delete_Last
140 (Container : in out List;
141 Count : Count_Type := 1);
143 procedure Reverse_Elements (Container : in out List);
145 function Iterate (Container : List)
146 return List_Iterator_Interfaces.Reversible_Iterator'Class;
148 function Iterate (Container : List; Start : Cursor)
149 return List_Iterator_Interfaces.Reversible_Iterator'Class;
152 (Container : in out List;
156 (Container : in out List;
160 (Target : in out List;
162 Source : in out List);
165 (Target : in out List;
167 Source : in out List;
168 Position : in out Cursor);
171 (Container : in out List;
175 function First (Container : List) return Cursor;
177 function First_Element (Container : List) return Element_Type;
179 function Last (Container : List) return Cursor;
181 function Last_Element (Container : List) return Element_Type;
183 function Next (Position : Cursor) return Cursor;
185 procedure Next (Position : in out Cursor);
187 function Previous (Position : Cursor) return Cursor;
189 procedure Previous (Position : in out Cursor);
194 Position : Cursor := No_Element) return Cursor;
196 function Reverse_Find
199 Position : Cursor := No_Element) return Cursor;
203 Item : Element_Type) return Boolean;
207 Process : not null access procedure (Position : Cursor));
209 procedure Reverse_Iterate
211 Process : not null access procedure (Position : Cursor));
214 with function "<" (Left, Right : Element_Type) return Boolean is <>;
215 package Generic_Sorting is
217 function Is_Sorted (Container : List) return Boolean;
219 procedure Sort (Container : in out List);
221 procedure Merge (Target, Source : in out List);
225 type Constant_Reference_Type
226 (Element : not null access constant Element_Type) is private
228 Implicit_Dereference => Element;
231 (Stream : not null access Root_Stream_Type'Class;
232 Item : Constant_Reference_Type);
234 for Constant_Reference_Type'Write use Write;
237 (Stream : not null access Root_Stream_Type'Class;
238 Item : out Constant_Reference_Type);
240 for Constant_Reference_Type'Read use Read;
242 type Reference_Type (Element : not null access Element_Type) is
245 Implicit_Dereference => Element;
248 (Stream : not null access Root_Stream_Type'Class;
249 Item : Reference_Type);
251 for Reference_Type'Write use Write;
254 (Stream : not null access Root_Stream_Type'Class;
255 Item : out Reference_Type);
257 for Reference_Type'Read use Read;
259 function Constant_Reference
260 (Container : List; Position : Cursor) -- SHOULD BE ALIASED
261 return Constant_Reference_Type;
264 (Container : List; Position : Cursor) -- SHOULD BE ALIASED
265 return Reference_Type;
269 pragma Inline (Next);
270 pragma Inline (Previous);
273 type Node_Access is access Node_Type;
277 Element : aliased Element_Type;
282 use Ada.Finalization;
285 new Controlled with record
288 Length : Count_Type := 0;
293 overriding procedure Adjust (Container : in out List);
295 overriding procedure Finalize (Container : in out List) renames Clear;
298 (Stream : not null access Root_Stream_Type'Class;
301 for List'Read use Read;
304 (Stream : not null access Root_Stream_Type'Class;
307 for List'Write use Write;
309 type List_Access is access all List;
310 for List_Access'Storage_Size use 0;
314 Container : List_Access;
319 (Stream : not null access Root_Stream_Type'Class;
322 for Cursor'Read use Read;
325 (Stream : not null access Root_Stream_Type'Class;
328 for Cursor'Write use Write;
330 type Constant_Reference_Type
331 (Element : not null access constant Element_Type) is null record;
334 (Element : not null access Element_Type) is null record;
336 Empty_List : constant List := (Controlled with null, null, 0, 0, 0);
338 No_Element : constant Cursor := Cursor'(null, null);
340 end Ada.Containers.Doubly_Linked_Lists;