blob: e01d355fc90cacb7cfa263b6acc02bc95dfe3d4a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
use std::error::Error;
use std::io;
use std::process;
// This lets us write `#[derive(Deserialize)]`.
use serde::Deserialize;
// We don't need to derive `Debug` (which doesn't require Serde), but it's a
// good habit to do it for all your types.
//
// Notice that the field names in this struct are NOT in the same order as
// the fields in the CSV data!
#[derive(Debug, Deserialize)]
#[serde(rename_all = "PascalCase")]
struct Record {
latitude: f64,
longitude: f64,
population: Option<u64>,
city: String,
state: String,
}
fn run() -> Result<(), Box<dyn Error>> {
let mut rdr = csv::Reader::from_reader(io::stdin());
for result in rdr.deserialize() {
let record: Record = result?;
println!("{:?}", record);
// Try this if you don't like each record smushed on one line:
// println!("{:#?}", record);
}
Ok(())
}
fn main() {
if let Err(err) = run() {
println!("{}", err);
process::exit(1);
}
}
|
