Attribute Macro serde_with::serde_as

#[serde_as]

Convenience macro to use the serde_as system.

The serde_as system is designed as a more flexible alterative to serde's with-annotation.

Example

use serde_with::{serde_as, DisplayFromStr};
use std::collections::HashMap;

#[serde_as]
#[derive(Serialize, Deserialize)]
struct Data {
    /// Serialize into number
    #[serde_as(as = "_")]
    a: u32,

    /// Serialize into String
    #[serde_as(as = "DisplayFromStr")]
    b: u32,

    /// Serialize into a map from String to String
    #[serde_as(as = "HashMap<DisplayFromStr, _>")]
    c: Vec<(u32, String)>,
}

Limitations

This macro cannot be used outside of the serde_with crate, since it relies on types defined therein. The serde_with crate has to be available in the root namespace under ::serde_with.