[][src]Derive Macro serde_with::SerializeDisplay


Serialize value by using it's Display implementation

This is an alternative way to implement Serialize for types which also implement Display by serializing the type as string. Ensure that the struct/enum also implements Display. If the implementation is missing you will get a error message like

error[E0277]: `Struct` doesn't implement `std::fmt::Display`

Deserialization with FromStr is available with the matching DeserializeFromStr derive.


This example is not tested
use std::fmt;

struct A {
    a: u32,
    b: bool,

impl fmt::Display for A {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "{}<>{}", self.a, self.b)

let a = A { a: 123, b: false };
assert_eq!(r#""123<>false""#, serde_json::to_string(&a).unwrap());