autojson/
lib.rs

1use std::path::Path;
2
3pub use failure::Error;
4use serde::de::DeserializeOwned;
5pub use serde::{Serialize, Deserialize};
6
7/// Convert any file into a struct
8pub fn structify<T: DeserializeOwned, P: AsRef<Path>>(path: P) -> Result<T, Error> {
9    Ok(serde_json::from_reader(std::fs::File::open(path)?)?)
10}
11
12/// Convert any struct to a file
13pub fn jsonify<T: Serialize, P: AsRef<Path>>(x: &T, path: P) -> Result<(), Error> {
14    std::fs::write(path, serde_json::to_string(x)?)?;
15    Ok(())
16}
17
18#[macro_export]
19macro_rules! auto_json_impl {
20    ($type: ty) => {
21
22        impl $type {
23
24            fn from_json<P: AsRef<std::path::Path>>(path: P) -> Result<Self, failure::Error> {
25                crate::structify(path)
26            }
27
28            fn to_json<P: AsRef<std::path::Path>>(&self, path: P) -> Result<(), failure::Error> {
29                crate::jsonify(self, path)
30            }
31
32        }
33        
34    };
35}
36
37
38#[cfg(test)]
39mod tests {
40    use super::*;
41
42    #[derive(Serialize, Deserialize)]
43    struct Data{
44        x: u8
45    }
46
47    auto_json_impl!(Data);
48
49}
autojson/lib.rs

autojson/
lib.rs
