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47 lines
846 B
Mathematica
47 lines
846 B
Mathematica
%---------------------------------------------------------------------------%
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% vim: ts=4 sw=4 et ft=mercury
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%---------------------------------------------------------------------------%
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:- module transitive_instance.
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:- interface.
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:- type t.
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:- implementation.
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:- import_module transitive_instance.sub2.
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:- type t
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---> some [T] c(T) => c2(T).
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:- module transitive_instance.sub1.
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:- interface.
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:- typeclass c1(T) where [].
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:- instance c1(int).
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:- implementation.
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:- instance c1(int) where [].
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:- end_module transitive_instance.sub1.
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:- module transitive_instance.sub2.
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:- interface.
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:- import_module transitive_instance.sub1.
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:- typeclass c2(T) <= c1(T) where [].
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:- instance c2(int).
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:- implementation.
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:- instance c2(int) where [].
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:- end_module transitive_instance.sub2.
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