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Estimated hours taken: 0.2 Branches: main browser/browse.m: browser/declarative_test.m: browser/set_cc.m: Conform to the convention of importing only one browser module per line.
71 lines
1.8 KiB
Mathematica
71 lines
1.8 KiB
Mathematica
%---------------------------------------------------------------------------%
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% Copyright (C) 2002-2003 The University of Melbourne.
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% This file may only be copied under the terms of the GNU Library General
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% Public License - see the file COPYING.LIB in the Mercury distribution.
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%---------------------------------------------------------------------------%
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% Set_cc is an implementation of sets which uses compare_representation
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% instead of builtin comparison, hence it is suitable for use with terms
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% that don't have a canonical representation. It is implemented using
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% tree234_cc; see that module for further discussion about the implications
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% of using compare_representation.
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%
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% Author: Mark Brown (dougl)
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%---------------------------------------------------------------------------%
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:- module mdb__set_cc.
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:- interface.
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:- import_module bool.
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:- type set_cc(T).
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:- pred set_cc__init(set_cc(T)).
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:- mode set_cc__init(uo) is det.
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:- pred set_cc__is_empty(set_cc(T)).
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:- mode set_cc__is_empty(in) is semidet.
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:- pred set_cc__member(T, set_cc(T), bool).
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:- mode set_cc__member(in, in, out) is cc_multi.
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:- pred set_cc__insert(set_cc(T), T, set_cc(T)).
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:- mode set_cc__insert(in, in, out) is cc_multi.
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:- pred set_cc__delete(set_cc(T), T, set_cc(T)).
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:- mode set_cc__delete(in, in, out) is cc_multi.
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%---------------------------------------------------------------------------%
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:- implementation.
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:- import_module mdb__tree234_cc.
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:- import_module std_util.
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:- type set_cc(T) == tree234_cc(T, unit).
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set_cc__init(S) :-
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tree234_cc__init(S).
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set_cc__is_empty(S) :-
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tree234_cc__is_empty(S).
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set_cc__member(T, S, Bool) :-
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tree234_cc__search(S, T, Maybe),
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(
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Maybe = yes(_),
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Bool = yes
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;
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Maybe = no,
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Bool = no
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).
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set_cc__insert(S0, T, S) :-
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tree234_cc__set(S0, T, unit, S).
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set_cc__delete(S0, T, S) :-
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tree234_cc__delete(S0, T, S).
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