Re: Name of 1-Tuple Data Type

Unit# seems fine to me, its not gonna be in prelude, its a short name, i dislike Only because i've only really seen it come up in in DB libraries :) On Thu, Jan 18, 2018 at 1:36 PM, Andrew Martin wrote:

I like Solo. I think it would be a very good name for this for the reasons you listed.

On Wed, Jan 17, 2018 at 9:41 PM, Theodore Lief Gannon wrote:

...

I've seen Only in the wild, and it's probably my favorite of the initial suggestions for the same reasons as Ryan. Mono is my second pick from that list.

Id is very clean, but I could see pedagogical issues arising from name confusion. Sing(le(ton)) is a terrible idea for the same reason.

Venturing my own paint swatch: Solo fits in nicely with the established size-specific names (pair, triple, etc.) and has all the good traits: short, self-explanatory, nothing with a confusingly similar name (that I know of).

On Jan 17, 2018 4:35 PM, "Ryan Reich" wrote:

Only has two virtues I can see easily: it's short (shorter than almost all the others), and it has the same feel as Maybe.

There is also Id, the name of the mathematical function that this type (and corresponding data) constructor is. Less pithy but even less intrusive.

On Jan 17, 2018 15:47, "Andrew Martin" wrote:

Required background information: https://ghc.haske ll.org/trac/ghc/ticket/14673

GHC has a one-tuple (both a boxed variant and an unboxed variant). The unboxed variant currently must be fully applied whenever it is used. This is in stark contrast to all the other n-tuples (n > 1). It stems entirely from an issue of syntax. The solution decided on is to provide a normal prefix name for the 1-tuple. The name that GHC uses internally for this type is `Unit#` (there is also a boxed variant Unit). However, in the haskell community, the word "unit" already refers to the nullary tuple, not the unary tuple. So, we're bikeshedding the name.

Here are some possible options:

* Unary (as in unary tuple) * Single (as in single, double, triple) * Singleton (as is singleton, doubleton, tripleton) * Only (https://hackage.haskell.org/package/Only-0.1/docs/Data-Tupl e-Only.html) * OneTuple (https://hackage.haskell.org/package/OneTuple-0.2.1/docs/Dat a-Tuple-OneTuple.html) * Uni (means "one" in latin or greek or something like that) * Mono (means "one" in latin or greek or something like that)

I would appreciate any feedback on the suggestions I provided or any additional suggestions for the name. If you have concerns about the feature itself, comment on the GHC Trac ticket. I'd prefer to keep this thread focused on just the problem of coming up with a name.

-- -Andrew Thaddeus Martin

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-- -Andrew Thaddeus Martin

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