> How about using ‘*unspecified*’ in those cases?
hrm, that looks interesting, thanks! i'll try using that first. it's Guile-specific, but then most of the rest of Guix is... > Out of curiosity, in what case do you need to represent “unset fields”? i think an example works better here: consider Swarm, a p2p storage solution. its node implementation is called Bee. bees can join swarms. there are some well-known swarms: 'testnet' and 'mainnet'. when someone specifies the swarm field as a symbol naming one of the well-known swarms, then some other mandatory fields should default to the appropriate values derived from it, *and* the service should warn if those fields are also set by the user. and when one is joining a custom swarm, as per giving a string name in the swarm field, then the service should warn when these mandatory fields are not explicitly specified. -- • attila lendvai • PGP: 963F 5D5F 45C7 DFCD 0A39 -- “We read the world wrong and say that it deceives us.” — Rabindranath Thakur, aka Tagore (1861–1941)