Updatable - is it updated after its value has been computed? - thunks only - a non-updatable thunk will effectively be call-by-name, so it should either be cheap or single-entry Single-entry - is it entered (called) once or zero times? - thunks or functions One-shot: same as single-entry | -----Original Message----- | From: ghc-devs [mailto:ghc-devs-bounces@haskell.org] On Behalf Of | Joachim Breitner | Sent: 17 March 2016 12:16 | To: GHC developers | Subject: Updatable, single entry, one-short thunks and lambda | | Dear list, | | in the literature, the code and the comments, I often find these | notions: |  * updatable |  * single-entry |  * one-shot | applied to thunks, functions, closures and lambda expressions on | various levels | | I have the impression that these are indeed plain synonyms (resp. | antinyms) when it comes to thunks and other closures, and indicate | whether a dynamic instance of this closure is going to be entered once | or more than once, while "one-shot", when applied to a lambda | expression (or, by extension function argument), indicates that this | lambda expression is _called_ at most once for every _evaluation_ of | it. | | Is that about right, or are there more pitfalls around? | | Greetings, | Joachim | | | -- | Joachim “nomeata” Breitner |   mail@joachim-breitner.de • | https://na01.safelinks.protection.outlook.com/?url=https%3a%2f%2fwww.jo | achim- | breitner.de%2f&data=01%7c01%7csimonpj%40064d.mgd.microsoft.com%7cd7df37 | ec4e6f406c455808d34e5df68b%7c72f988bf86f141af91ab2d7cd011db47%7c1&sdata | =pigxxB7cDKt7AZbAUOHHK17%2bqcvJAXtmErf6HJPHCFs%3d |   XMPP: nomeata@joachim-breitner.de • OpenPGP-Key: 0xF0FBF51F |   Debian Developer: nomeata@debian.org