19 lines
352 B
Text
19 lines
352 B
Text
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import logic data.unit
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structure point (A : Type) (B : Type) :=
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mk :: (x : A) (y : B)
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structure point2 (A : Type) (B : Type) extends point A B :=
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make
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check point2.make
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structure point3 extends point num num, point2 num num renaming x→y y→z
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check point3.mk
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set_option pp.coercions true
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theorem tst : point3.mk 1 2 3 = point2.make 2 3 :=
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rfl
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