1 use std::error::Error;
2 use std::io;
3 use std::process;
4
5 use serde::Deserialize;
6 #[derive(Debug, Deserialize)]
7 #[serde(rename_all = "PascalCase")]
8 struct Record {
9 latitude: f64,
10 longitude: f64,
11 #[serde(deserialize_with = "csv::invalid_option")]
12 population: Option<u64>,
13 city: String,
14 state: String,
15 }
16
run() -> Result<(), Box<dyn Error>>17 fn run() -> Result<(), Box<dyn Error>> {
18 let mut rdr = csv::Reader::from_reader(io::stdin());
19 for result in rdr.deserialize() {
20 let record: Record = result?;
21 println!("{:?}", record);
22 }
23 Ok(())
24 }
25
main()26 fn main() {
27 if let Err(err) = run() {
28 println!("{}", err);
29 process::exit(1);
30 }
31 }
32