playground

//// The shape module

import gleam/float
import gleam/int

/// Some shapes
pub type Shape {
  Rectangle(width: Int, height: Int)
  Circle(radius: Int)
  Square(Float)
}

/// A function that take a shape, and returns some info about it.
pub fn shape_info(box: Shape) -> String {
  case box {
    Rectangle(..) -> "It's a rectangle."
    Circle(42) -> "It's a circle with a radius of 42."
    Circle(radius: r) ->
      "It's a circle with a radius of " <> int.to_string(r) <> "."
    Square(metre) -> "It's a " <> float.to_string(metre) <> " metre square."
  }
}