Convert YAML to JSON and back

cargo add [email protected] -F serde_json
cargo add serde_json

use oneyaml::Value;
 
fn main() -> Result<(), Box<dyn std::error::Error>> {
    // YAML to JSON: read a Value, convert it (feature "serde_json").
    let yaml = "\
name: web
ports: [80, 443]
tls: true
owner: ~
";
    let v: Value = oneyaml::from_str(yaml)?;
    let json = serde_json::Value::try_from(&v)?;
    println!("{}", serde_json::to_string_pretty(&json)?);
 
    // JSON to YAML: JSON is valid YAML 1.2, so read it and write YAML.
    let text = r#"{"name": "web", "ports": [80, 443], "env": {"LOG": "info"}}"#;
    let v: Value = oneyaml::from_str(text)?;
    print!("{}", oneyaml::to_string(&v)?);
 
    // Values with no JSON form are an error with a path, not a silent change.
    let v: Value = oneyaml::from_str("ratio: .nan\n")?;
    println!("{}", serde_json::Value::try_from(&v).unwrap_err());
    Ok(())
}

{
  "name": "web",
  "owner": null,
  "ports": [
    80,
    443
  ],
  "tls": true
}
name: web
ports:
  - 80
  - 443
env:
  LOG: info
float .nan has no JSON form (JSON numbers are finite) at ratio