Newest at the top
| 2025-11-09 11:39:06 +0100 | merijn | (~merijn@host-vr.cgnat-g.v4.dfn.nl) merijn |
| 2025-11-09 11:37:45 +0100 | trickard_ | trickard |
| 2025-11-09 11:33:43 +0100 | __monty__ | (~toonn@user/toonn) toonn |
| 2025-11-09 11:31:57 +0100 | humasect | (~humasect@dyn-192-249-132-90.nexicom.net) (Remote host closed the connection) |
| 2025-11-09 11:30:15 +0100 | lisbeths | (uid135845@id-135845.lymington.irccloud.com) (Quit: Connection closed for inactivity) |
| 2025-11-09 11:27:34 +0100 | merijn | (~merijn@host-vr.cgnat-g.v4.dfn.nl) (Ping timeout: 246 seconds) |
| 2025-11-09 11:24:14 +0100 | Lycurgus | (~juan@user/Lycurgus) Lycurgus |
| 2025-11-09 11:21:02 +0100 | merijn | (~merijn@host-vr.cgnat-g.v4.dfn.nl) merijn |
| 2025-11-09 11:16:44 +0100 | trickard_ | (~trickard@cpe-62-98-47-163.wireline.com.au) |
| 2025-11-09 11:14:25 +0100 | Nachtgespenst | (~user@user/siracusa) siracusa |
| 2025-11-09 11:10:51 +0100 | <kaol> | It's a nice new angle to think of what it does. |
| 2025-11-09 11:10:07 +0100 | merijn | (~merijn@host-vr.cgnat-g.v4.dfn.nl) (Ping timeout: 240 seconds) |
| 2025-11-09 11:10:01 +0100 | <kaol> | Why didn't I think of that. Thanks. |
| 2025-11-09 11:09:53 +0100 | tzh | (~tzh@c-76-115-131-146.hsd1.or.comcast.net) (Quit: zzz) |
| 2025-11-09 11:07:31 +0100 | <Leary> | kaol: `Data.Proxy` |
| 2025-11-09 11:05:19 +0100 | trickard_ | (~trickard@cpe-62-98-47-163.wireline.com.au) (Ping timeout: 260 seconds) |
| 2025-11-09 11:05:15 +0100 | merijn | (~merijn@host-vr.cgnat-g.v4.dfn.nl) merijn |
| 2025-11-09 11:04:57 +0100 | humasect | (~humasect@dyn-192-249-132-90.nexicom.net) humasect |
| 2025-11-09 10:56:43 +0100 | merijn | (~merijn@host-vr.cgnat-g.v4.dfn.nl) (Ping timeout: 264 seconds) |
| 2025-11-09 10:56:42 +0100 | humasect | (~humasect@dyn-192-249-132-90.nexicom.net) (Remote host closed the connection) |
| 2025-11-09 10:55:04 +0100 | <tomsmeding> | fair |
| 2025-11-09 10:54:01 +0100 | <kaol> | I may need the construct across multiple modules and then I'd be better off using the same data One a = One via an import and if I import then I could get it from a library as well. |
| 2025-11-09 10:51:37 +0100 | merijn | (~merijn@host-vr.cgnat-g.v4.dfn.nl) merijn |
| 2025-11-09 10:51:13 +0100 | <tomsmeding> | kaol: as dibblego mentioned, you don't need predefined types for this, and in fact it might be more intuitive to write your own; the "no values at all" is `data None a` (isomorphic to Const Void), and the "exactly one value" is `data One a = One` (isomorphic to Const ()) |
| 2025-11-09 10:49:10 +0100 | <kaol> | Neat. I'm not sure if I need it after all but I started still thinking that surely there's a Type -> Type for this case too. |
| 2025-11-09 10:47:57 +0100 | Tuplanolla | (~Tuplanoll@91-159-187-167.elisa-laajakaista.fi) Tuplanolla |
| 2025-11-09 10:47:44 +0100 | <tomsmeding> | then Const () :) |
| 2025-11-09 10:47:40 +0100 | <tomsmeding> | oh I see |
| 2025-11-09 10:47:17 +0100 | <kaol> | I'm not sure if I can have any values having that type. I'd still like to have a record containing the other fields. |
| 2025-11-09 10:46:28 +0100 | trickard_ | (~trickard@cpe-62-98-47-163.wireline.com.au) |
| 2025-11-09 10:46:15 +0100 | trickard_ | (~trickard@cpe-62-98-47-163.wireline.com.au) (Read error: Connection reset by peer) |
| 2025-11-09 10:43:24 +0100 | califax | (~califax@user/califx) califx |
| 2025-11-09 10:42:22 +0100 | califax | (~califax@user/califx) (Remote host closed the connection) |
| 2025-11-09 10:40:52 +0100 | <tomsmeding> | Const Void |
| 2025-11-09 10:40:48 +0100 | merijn | (~merijn@host-vr.cgnat-g.v4.dfn.nl) (Ping timeout: 260 seconds) |
| 2025-11-09 10:39:53 +0100 | <kaol> | I was thinking that if I have some data Foo a = { foo :: a Int } then I can have Foo Identity to have something that always has a foo and Foo Maybe that would optionally have a foo. I wondered whether there is some Foo X that would give me a data that'd have no foo. |
| 2025-11-09 10:38:48 +0100 | <tomsmeding> | one of these, exercise for the reader to figure out which |
| 2025-11-09 10:38:27 +0100 | <tomsmeding> | bah my brain this morning |
| 2025-11-09 10:38:03 +0100 | <tomsmeding> | it's more like (), and either `data X a` indeed, or `Const ()`, works |
| 2025-11-09 10:37:49 +0100 | <tomsmeding> | but then it's not like Void |
| 2025-11-09 10:37:37 +0100 | <dibblego> | er, data |
| 2025-11-09 10:37:33 +0100 | <tomsmeding> | a newtype must have one constructor |
| 2025-11-09 10:37:20 +0100 | <dibblego> | I understand the question to mean: newtype X a; |
| 2025-11-09 10:37:18 +0100 | <tomsmeding> | (Data.Functor.Const in base) |
| 2025-11-09 10:37:08 +0100 | <tomsmeding> | If yes then `Const ()`; if no then `Const Void` |
| 2025-11-09 10:36:19 +0100 | <tomsmeding> | kaol: should there be a value of this type or not? "Maybe that is always Nothing" has 1 value (Nothing); VOid has 0 values |
| 2025-11-09 10:35:50 +0100 | merijn | (~merijn@host-vr.cgnat-g.v4.dfn.nl) merijn |
| 2025-11-09 10:35:48 +0100 | <tomsmeding> | a -> Void, rather |
| 2025-11-09 10:33:15 +0100 | califax | (~califax@user/califx) califx |
| 2025-11-09 10:33:00 +0100 | <humasect> | a -> () ? |