Module type Parameter_sig.Value_datatype

module type Value_datatype = sig .. end

Signature of the optional value associated to the key and required to build map parameters.

Since Sodium-20150201

include Datatype.S

type key

val of_string : key:key ->
       prev:t option -> string option -> t option

key is the key associated to this value, while prev is the previous value associated to this key (if any). The optional string is None if there is no value associated to the key, and Some v (potentially v = "") otherwise.

Raises Cannot_build if there is no element corresponding to the given string.
Returns None if there is no value to associate to the key or Some v otherwise.

val to_string : key:key -> t option -> string option

key is the key associated to this value. The optional string is None if there is no value associated to the key, and Some v (potentially v = "") otherwise.

Returns None if there is no value to associate to the key or Some v otherwise.