The following table lists all the currently implemented generic functions:

Class	Description
CaptureErrors (code)	Calls a function, capturing all PHP errors raised during the execution of the function. Provides access to the queue of captured errors afterwards.
ExceptionToError (code)	Calls a function, rerouting any raised exception to a userland triggered error and returning false. Useful in conjunction with CaptureErrors.
Expression (code)	Converts a string containing a PHP expression into a callable. Useful when you want to build small functions without the overhead of PHP closure syntax.
Improve (code)	Repetively refine a guess until it reaches an acceptable answer. Useful in mathematics, to converge on a value such as the golden ratio or the root of an equation.
Retry (code)	Retries a function until the function succeeds or fails the retry strategy. The default retry strategy attempts 5 calls and exponentially increases the delay between each call. You can define your own retry strategy.
Y (code)	Implements the Y-combinator, which is a way to express a recursive algorithm with neither recursion nor iteration.