/src/lib/storage/dictionary/ext_avl_dictionary.e
http://github.com/tybor/Liberty · Specman e · 68 lines · 31 code · 8 blank · 29 comment · 0 complexity · 070daf9aeeb8239b7c08ab590bb15649 MD5 · raw file
- -- This file is part of a Liberty Eiffel library.
- -- See the full copyright at the end.
- --
- class EXT_AVL_DICTIONARY[V_, K_]
- --
- -- Associative memory. Values of type `V_' are stored using Keys of type `K_'.
- --
- -- Efficient implementation of DICTIONARY using an AVL balanced tree. AVL stands for the names of G. M. Adel'son-Velskii
- -- and E. M. Landis, two Russian mathematicians who first came up with this method of keeping the tree balanced.
- --
- inherit
- ABSTRACT_AVL_DICTIONARY[V_, K_]
- rename
- make as abs_make
- end
- create {ANY}
- make
- feature {ANY}
- order: PREDICATE[TUPLE[K_, K_]]
- feature {}
- ordered (k1, k2: K_): BOOLEAN
- do
- Result := order.item([k1, k2])
- end
- a_new_node: EXT_AVL_DICTIONARY_NODE[V_, K_]
- do
- create Result.make(order)
- end
- make (a_order: like order)
- require
- a_order /= Void
- do
- order := a_order
- abs_make
- ensure
- order = a_order
- end
- invariant
- order /= Void
- end -- class EXT_AVL_DICTIONARY
- --
- -- Copyright (C) 2009-2017: by all the people cited in the AUTHORS file.
- --
- -- Permission is hereby granted, free of charge, to any person obtaining a copy
- -- of this software and associated documentation files (the "Software"), to deal
- -- in the Software without restriction, including without limitation the rights
- -- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- -- copies of the Software, and to permit persons to whom the Software is
- -- furnished to do so, subject to the following conditions:
- --
- -- The above copyright notice and this permission notice shall be included in
- -- all copies or substantial portions of the Software.
- --
- -- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- -- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- -- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- -- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- -- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- -- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- -- THE SOFTWARE.