extern crate serde;
extern crate serde_json;
use serde::{Deserialize, Serialize};

#[derive(Serialize, Deserialize)]
struct S {
    data: Vec<f32>,
}

fn read() -> S {
  let p: S = serde_json::from_str(r#"{"data": [1,2,3]}"#).unwrap();
  return p;
}

fn main() {
  let mut data = Vec::new();
  let p = read();
  for v in p.data.iter() { data.push(v); }
}