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@ @since

@since(n)

Applies to: type, field

Section: §9.2

Syntax

ebnf
Attr        = "@" Path [ "(" [ AttrArgs ] ")" ] ;

Grammar: App. A

Defined in

  • 9.2 Field numbers and schema — Every field of a data and every variant of an enum has a stable tag (the number in the wire format).
  • 4.2 data — A field: visibility?
  • 4.9 Attributes — Syntax: @name or @name(arguments) before a declaration, field, parameter or rpc.

Examples

oxl
pub(api) data User {
  pub(api) id: UserId
  pub(api) name: Name
  pub(api) email: Email?           @since(2)
  role: Role = Role.User
  createdAt: Time = now()
  invariant name != "admin" || role == Role.Admin
}

— 4.2 data

Related diagnostics

schema-attr, schema-break, unknown-field, deprecated

See also