34 lines
811 B
Rust
34 lines
811 B
Rust
use std::error::Error;
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use std::io;
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use std::process;
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use serde::Deserialize;
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// By default, struct field names are deserialized based on the position of
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// a corresponding field in the CSV data's header record.
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#[derive(Debug, Deserialize)]
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struct Record {
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city: String,
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region: String,
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country: String,
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population: Option<u64>,
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}
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fn example() -> Result<(), Box<dyn Error>> {
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let mut rdr = csv::Reader::from_reader(io::stdin());
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for result in rdr.deserialize() {
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// Notice that we need to provide a type hint for automatic
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// deserialization.
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let record: Record = result?;
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println!("{:?}", record);
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}
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Ok(())
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}
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fn main() {
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if let Err(err) = example() {
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println!("error running example: {}", err);
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process::exit(1);
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}
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}
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