16 lines
308 B
Text
16 lines
308 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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check point.eta
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example (p : point num num) : point.mk (point.x p) (point.y p) = p :=
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point.eta p
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inductive color :=
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red, green, blue
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structure color_point (A : Type) (B : Type) extends point A B :=
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mk :: (c : color)
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