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49 lines
1.0 KiB
Mathematica
49 lines
1.0 KiB
Mathematica
%---------------------------------------------------------------------------%
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% vim: ts=4 sw=4 et ft=mercury
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%---------------------------------------------------------------------------%
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%
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:- module compare_rep_usereq.
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:- interface.
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:- import_module io.
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:- pred main(io::di, io::uo) is cc_multi.
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:- implementation.
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:- import_module pair.
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:- import_module univ.
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main(!IO) :-
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test(da, da, !IO),
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test(da, db, !IO).
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:- type val == pair(string, univ).
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:- func da = val.
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da = "aa : foo" - univ(aa).
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:- func db = val.
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db = "bb : foo" - univ(bb).
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:- type foo
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---> aa
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; bb
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where equality is foo_eq.
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:- pred foo_eq(foo::in, foo::in) is semidet.
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foo_eq(_, _) :-
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semidet_succeed.
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:- pred test(val::in, val::in, io::di, io::uo) is cc_multi.
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test(SA - A, SB - B, !IO) :-
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io.write_string(SA, !IO),
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io.nl(!IO),
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io.write_string(SB, !IO),
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io.nl(!IO),
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compare_representation(Res, A, B),
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io.write_string("Result = ", !IO),
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io.write(Res, !IO),
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io.write_string(".\n\n", !IO).
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