`crow/result.crow` (source)

`result`[`ok`, `error`] `union`

ok ok
error error

A result is either a success (ok) or failure (error) value.

This provides a more explicit alternative to throwing an exception.
Prefer this over throwing an exception if failure is likely.

`==`[`t`, `u`] `bool`(`a` (`t`, `u`) `result`, `b` (`t`, `u`) `result`) `t` `equal`, `u` `equal`

`then`[`out`, `in`, `err`] (`out`, `err`) `result`(`a` (`in`, `err`) `result`, `f` `mut` (`out`, `err`) `result`(`in`))

`is-ok`[`t`, `u`] `bool`(`a` (`t`, `u`) `result`)