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This code source don’t compile, Is there a way to make that in OPA ?
type User = { nom : string ; prenom : string }
un_user = { nom = "My_name" ; prenom = "My_last_name" } : User
champ = "nom"
do jlog(un_user.`champ`)
Runtime magic is possible in Opa, using the OpaValue module which contains feature for runtime introspection of values (not type safe)
http://opalang.org/resources/doc/index.html#opavalue.opa.html/!/value_stdlib.core.OpaValue.Record
But this is not for casual user, and a very dangerous coding style.
It is often a need coming from code written in a coding style corresponding to scripts and runtime evaluated language.