This code,typically, is still in heavy use and is well tested. This designation connotesprimarily that we feel the API may change heavily over time. User code should not depend on symbolsin those namespaces.įolly has an experimental directory as well. Namespace folly defines other internal namespacessuch as internal or detail. Macro names are ALL_UPPERCASE and should be prefixedwith FOLLY_. There is no restriction on internaldependencies, meaning that a given folly module may use any otherfolly components.Īll symbols are defined in the top-level namespace folly, except ofcourse macros. Check it out in the intro videoįolly is a collection of relatively independent components, some assimple as a few symbols. Good performance at largescale is a unifying theme in all of Folly. Performance concerns permeate much of Folly, sometimes leading todesigns that are more idiosyncratic than they would otherwise be (seee.g. We endeavor to removethings from folly if or when std or Boost obsoletes them.
In fact, we embark on defining ourown component only when something we need is either not available, ordoes not meet the needed performance profile. It complements (as opposed to competing against) offeringssuch as Boost and of course std. In particular, it's often a dependency of Facebook's otheropen source C++ efforts and place where those projects can share code. Folly contains a variety of core library components used extensivelyat Facebook. An open-source C++ library developed and used at Facebook.įolly: Facebook Open-source Library What is folly?įolly (acronymed loosely after Facebook Open Source Library) is alibrary of C++14 components designed with practicality and efficiencyin mind.
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