16 lines
336 B
Text
16 lines
336 B
Text
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definition f (A : Type*) (a : A) :=
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have has_add A, from has_add.mk (λ (a b : A), a),
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a + a
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definition f (A : Type*) (a : A) : has_add A → A :=
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λ s, a + a
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definition f (A : Type*) (a : A) :=
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λ s : has_add A, a + a
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definition f (A : Type*) [has_add A] (a : A) :=
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a + a
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definition g (A : Type*) (s : has_add A) (a : A) :=
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a + a
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