/// DocC uses the first line of a comment as the summary.
///
/// Insert blank lines to break text into separate paragraphs.
///
/// You can use bulleted lists (use `-`, `+` or `*`):
///
/// - Text can be _emphasised_
/// - Or **strong**
///
/// Or numbered lists:
///
/// 7. The numbers you use make no difference
/// 0. The list will still be ordered, starting from 1
/// 5. But be sensible and just use 1, 2, 3 etc…
///
/// A [link][1] an an ![image][2]
///
/// # More Formats
///
/// ## Table
///
/// Sloth speed | Description
/// --- | ---
/// `slow` | Moves slightly faster than a snail.
/// `medium` | Moves at an average speed.
/// `fast` | Moves faster than a hare.
/// `supersonic` | Moves faster than the speed of sound.
///
///
/// ## Inline Code
///
/// - Use backticks for inline `code()`.
///
/// ## Code Block
///
/// - **Important**: when formatting your code listing, use spaces to indent lines instead of tabs.
/// - Also notice that code blocks scroll horizontally instead of wrapping.
///
/// ```swift
/// struct Sightseeing: Activity {
/// func perform(with sloth: inout Sloth) -> Speed {
/// sloth.energyLevel -= 10
/// return .slow
/// }
/// }
/// ```
///
/// ## Links & Images
///
/// Include [links](https://en.wikipedia.org/wiki/Hyperlink), and even images:
///
/// 
///
/// A [link][1] an an ![image][2]
///
/// [1]: https://www.google.com
/// [2]: slot_04@2x.png
///
/// - note: That "Note:" is written in bold.
/// - requires: A basic understanding of Markdown.
/// - seealso: `Error`, for a description of the errors that can be thrown.
struct Sloth {
/// Eat the provided specialty sloth food.
///
/// Sloths love to eat while they move very slowly through their rainforest
/// habitats. They're especially happy to consume leaves and twigs, which they
/// digest over long periods of time, mostly while they sleep.
///
/// When they eat food, a sloth's ``energyLevel`` increases by the food's ``energy``.
///
/// - Parameters:
/// - food: The food for the sloth to eat.
/// - quantity: The quantity of the food for the sloth to eat.
///
/// - Returns: The sloth's energy level after eating.
///
/// - Throws: `SlothError.tooMuchFood` if the quantity is more than 100.
mutating public func eat(_ food: Food, quantity: Int) throws -> Int {
energyLevel += food.energy * quantity
return energyLevel
}
var energyLevel: Int = 0
}
struct Food {
let name: String
let energy: Int
}
struct MyProgram {
func method() {
var sloth = Sloth()
let _ = try? sloth.eat(Food(name: "leaves", energy: 2), quantity: 100)
}
}