12 lines
391 B
Text
12 lines
391 B
Text
example (a b : nat) (p : nat → nat → Prop) (h₁ : p a b) (h₂ : a = b) : p b b :=
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@@eq.subst (λ x, p x b) h₂ h₁
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set_option pp.all true
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variable my_has_add : has_add nat
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#check @@has_add.add my_has_add 0 1
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local notation h1 `▸[` m `]` h2 := @@eq.subst m h1 h2
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example (a b : nat) (p : nat → nat → Prop) (h₁ : p a b) (h₂ : a = b) : p b b :=
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h₂ ▸[λ x, p x b] h₁
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