exception

Functions

defer

pub fn defer(cleanup: fn() -> a, body: fn() -> b) -> b

This function will run a cleanup function after the given body function, even if the body function crashes.

You should ideally never use this function! Exceptions are not flow control in Gleam, a result type should be used instead. This function is only if you need to perform some cleanup when a crash occurs.

Examples

pub fn run_with_lock(f: fn() -> a) -> a {
  let lock = acquire()
  use <- defer(fn() { release(lock) })
  f()
}

rescue

</>

pub fn rescue(body: fn() -> a) -> Result(a, Dynamic)

This function will catch any crash and convert it into a result rather than crashing the process.