src/content/chapter1_functions/lesson09_documentation_comments/code.gleam


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//// A module containing some unusual functions and types.

/// A type where the value can never be constructed.
/// Can you work out why?
pub type Never {
  Never(Never)
}

/// Call a function twice with an initial value.
///
pub fn twice(argument: value, my_function: fn(value) -> value) -> value {
  my_function(my_function(argument))
}

/// Call a function three times with an initial value.
///
pub fn thrice(argument: value, my_function: fn(value) -> value) -> value {
  my_function(my_function(my_function(argument)))
}