Macro serde_json::json

source ·
macro_rules! json {
    ($($json:tt)+) => { ... };
Expand description

Construct a serde_json::Value from a JSON literal.

let value = json!({
    "code": 200,
    "success": true,
    "payload": {
        "features": [

Variables or expressions can be interpolated into the JSON literal. Any type interpolated into an array element or object value must implement Serde’s Serialize trait, while any type interpolated into a object key must implement Into<String>. If the Serialize implementation of the interpolated type decides to fail, or if the interpolated type contains a map with non-string keys, the json! macro will panic.

let code = 200;
let features = vec!["serde", "json"];

let value = json!({
    "code": code,
    "success": code == 200,
    "payload": {
        features[0]: features[1]

Trailing commas are allowed inside both arrays and objects.

let value = json!([
    "comma -->",