Module serde_with::rust::btreemap_as_tuple_list [−][src]
De/Serialize a BTreeMap
into a list of tuples
Some formats, like JSON, have limitations on the type of keys for maps. In case of JSON, keys are restricted to strings. Rust features more powerful keys, for example tuple, which can not be serialized to JSON.
This helper serializes the BTreeMap
into a list of tuples, which does not have the same type restrictions.
If you need to de/serialize a HashMap
then use hashmap_as_tuple_list
.
Converting to serde_as
The same functionality can be more clearly expressed using the serde_as
macro.
The _
is a placeholder which works for any type which implements Serialize
/Deserialize
, such as the tuple and u32
type.
#[serde_as] #[derive(Deserialize, Serialize)] struct A { #[serde_as(as = "Vec<(_, _)>")] s: BTreeMap<(String, u32), u32>, }
Examples
#[derive(Deserialize, Serialize)] struct A { #[serde(with = "serde_with::rust::btreemap_as_tuple_list")] s: BTreeMap<(String, u32), u32>, } let v: A = serde_json::from_value(json!({ "s": [ [["Hello", 123], 0], [["World", 456], 1] ] })).unwrap(); assert_eq!(2, v.s.len()); assert_eq!(1, v.s[&("World".to_string(), 456)]);
Functions
deserialize | Deserialize a |
serialize | Serialize the |