mirror of
https://github.com/Mercury-Language/mercury.git
synced 2025-12-14 13:23:53 +00:00
d465fa53cb
Discussion of these changes can be found on the Mercury developers
mailing list archives from June 2018.
COPYING.LIB:
Add a special linking exception to the LGPL.
*:
Update references to COPYING.LIB.
Clean up some minor errors that have accumulated in copyright
messages.
67 lines
1.7 KiB
Mathematica
67 lines
1.7 KiB
Mathematica
%---------------------------------------------------------------------------%
|
|
% vim: ft=mercury ts=4 sw=4 et
|
|
%---------------------------------------------------------------------------%
|
|
% Copyright (C) 2002-2003, 2006 The University of Melbourne.
|
|
% Copyright (C) 2015, 2018 The Mercury team.
|
|
% This file is distributed under the terms specified in COPYING.LIB.
|
|
%---------------------------------------------------------------------------%
|
|
%
|
|
% set_cc is an implementation of sets which uses compare_representation
|
|
% instead of builtin comparison, hence it is suitable for use with terms
|
|
% that don't have a canonical representation. It is implemented using
|
|
% tree234_cc; see that module for further discussion about the implications
|
|
% of using compare_representation.
|
|
%
|
|
% Author: Mark Brown (dougl)
|
|
%
|
|
%---------------------------------------------------------------------------%
|
|
|
|
:- module mdb.set_cc.
|
|
|
|
:- interface.
|
|
:- import_module bool.
|
|
|
|
:- type set_cc(T).
|
|
|
|
:- pred init(set_cc(T)::uo) is det.
|
|
|
|
:- pred is_empty(set_cc(T)::in) is semidet.
|
|
|
|
:- pred member(T::in, set_cc(T)::in, bool::out) is cc_multi.
|
|
|
|
:- pred insert(set_cc(T)::in, T::in, set_cc(T)::out) is cc_multi.
|
|
|
|
:- pred delete(set_cc(T)::in, T::in, set_cc(T)::out) is cc_multi.
|
|
|
|
%---------------------------------------------------------------------------%
|
|
|
|
:- implementation.
|
|
|
|
:- import_module mdb.tree234_cc.
|
|
|
|
:- import_module maybe.
|
|
|
|
:- type set_cc(T) == tree234_cc(T, unit).
|
|
|
|
init(S) :-
|
|
tree234_cc.init(S).
|
|
|
|
is_empty(S) :-
|
|
tree234_cc.is_empty(S).
|
|
|
|
member(T, S, Bool) :-
|
|
tree234_cc.search(S, T, Maybe),
|
|
(
|
|
Maybe = yes(_),
|
|
Bool = yes
|
|
;
|
|
Maybe = no,
|
|
Bool = no
|
|
).
|
|
|
|
insert(S0, T, S) :-
|
|
tree234_cc.set(S0, T, unit, S).
|
|
|
|
delete(S0, T, S) :-
|
|
tree234_cc.delete(S0, T, S).
|