22 lines
420 B
Text
22 lines
420 B
Text
import data.finset
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open bool nat list finset
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definition fset [class] (A : Type) := finset A
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definition fin_nat [instance] : fset nat :=
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to_finset [0]
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definition fin_bool [instance] : fset bool :=
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to_finset [tt, ff]
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definition tst (A : Type) [s : fset A] : finset A :=
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s
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example : tst nat = to_finset [0] :=
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rfl
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example : tst bool = to_finset [ff, tt] :=
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dec_trivial
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example : tst bool = to_finset [tt, ff] :=
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rfl
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