在 OCaml 中更新匿名记录中的单个记录字段

Question

这不是有效的语法，但是是否可以执行类似的操作来获取新的更新的匿名记录，类似于使用

with

处理普通记录？

type user = User {id: int, ... more fields}
let u = User {id = 1, ...}
let u2 = User with id = 2

Answer 1

20:01 < discocaml> <deepspacejohn> you can bind the record to a name with `let Thing t2 = t`
20:01 < discocaml> <deepspacejohn> `let t = Thing {id = 1} in let Thing t2 = t in Thing {t2 with id = 2}`