12月12日の学び
データ型の定義
Prelude> data Shape = Circle Float Float Float | Rectangle Float Float Float Float Prelude> :t Circle Circle :: Float -> Float -> Float -> Shape Prelude> :t Rectangle Rectangle :: Float -> Float -> Float -> Float -> Shape
Prelude> data Shape = Circle Float Float Float | Rectangle Float Float Float Float Prelude> :t Circle Circle :: Float -> Float -> Float -> Shape Prelude> :t Rectangle Rectangle :: Float -> Float -> Float -> Float -> Shape