Constant static str de/ser in facet-json

const_str_field.rs

#!/usr/bin/env rust-script
//! ```cargo
//! [dependencies]
//! facet = "0.30"
//! facet-json = "0.30"
//! ```

use facet::Facet;
use facet_json;

/// Example of a struct with a constant "type" field.
#[derive(Debug, Clone, Facet)]
pub struct SymbolRule {
    /// Always "SYMBOL".
    #[facet(rename = "type")]
    pub r#type: &'static str,

    /// The name of the referenced symbol.
    pub name: String,
}

fn main() -> Result<(), Box<dyn std::error::Error>> {
    // Deserialize SymbolRule
    let json = r#"{"type":"SYMBOL","name":"my_symbol"}"#;
    let deserialized: SymbolRule = facet_json::from_str(&json)?;
    println!("Deserialized struct: {:#?}", deserialized);

    Ok(())
}