11 lines
260 B
Text
11 lines
260 B
Text
structure weird (A : Type) :=
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{B : Type} (op : A → B → A)
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definition foo1 : weird nat :=
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{ op := nat.add }
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definition foo2 : weird nat :=
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⟨ nat.add ⟩
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definition foo3 : weird nat :=
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{ B := nat, op := nat.add } -- Error: implicit field being provided
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