Crate serde_csv_extra

Csv-related serde addons

use serde::{Deserialize, Serialize};

#[derive(Deserialize, Serialize)]
struct Foo {
   #[serde(with = "serde_csv_extra::vec_num")]
   list: Vec<i32>,
   #[serde(with = "serde_csv_extra::vec_vec_num")]
   matrix: Vec<Vec<i32>>,
   #[serde(with = "serde_csv_extra::maybe_image_size")]
   image_size: Option<(u8, u16)>,
   #[serde(with = "serde_csv_extra::maybe_lat_lon")]
   geo: Option<(f32, f32)>,
}

let mut wtr = csv::WriterBuilder::new().has_headers(false).from_writer(Vec::new());
wtr.serialize(
    Foo {
        list: vec![-1, 1],
        matrix: vec![vec![-1, 1], vec![1, -1]],
        image_size: Some((16, 1024)),
        geo: Some((84.99, -135.00)),
    }
).unwrap();
wtr.serialize(
    Foo {
        list: vec![],
        matrix: vec![],
        image_size: None,
        geo: None,
    }
).unwrap();
let s = String::from_utf8(wtr.into_inner().unwrap()).unwrap();
assert_eq!(s, "-1_1,-1_1|1_-1,16x1024,84.99;-135\n,,,\n");

Modules

maybe_image_size

Some((128, 64)) <–> 128x64

maybe_lat_lon

Some((84.99, -135.00)) <–> 84.99;-135.00

vec_num

&[-1, 1] <–> -1_1

vec_vec_num

&[[vec![-1, 1], vec![1, -1]] <–> -1_1|1_-1