43 lines
758 B
Text
43 lines
758 B
Text
#check { prod . fst := 10, snd := 20 }
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#check ({ fst := 10, snd := 20 } : nat × nat)
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definition p : nat × nat :=
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{ snd := 20, fst := 10 }
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#print p
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definition attr : user_attribute :=
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{ name := `foo, descr := "hello world" }
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#print attr
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definition p2 :=
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{ p with fst := 20 }
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#print p2
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structure point :=
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(x : nat) (y : nat)
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structure point3d extends point :=
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(z : nat)
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definition p1 : point := { x := 1, y := 1 }
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definition p3 : point3d := { p1 with z := 10 }
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#print p3
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#check { point3d . x := 1, y := 2, z := 3 }
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#check (⟨10, rfl⟩ : Σ' x : nat, x = x)
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#check ((| 10, rfl |) : Σ' x : nat, x = x)
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#check ({ fst := 10, snd := rfl } : Σ' x : nat, x = x)
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definition f (a : nat) : Σ' x : nat, x = x :=
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{ fst := a, snd := rfl }
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#print f
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