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18 lines
363 B
Mathematica
18 lines
363 B
Mathematica
%---------------------------------------------------------------------------%
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% vim: ts=4 sw=4 et ft=mercury
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%---------------------------------------------------------------------------%
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:- module non_stratification.
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:- interface.
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:- pred foo(int::in) is semidet.
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:- implementation.
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:- import_module int.
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foo(1).
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foo(2).
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foo(3).
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foo(X) :-
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not foo(X - 1).
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