Initial import of csv-1.1.5.
Bug: 155309706
Change-Id: Id08b46b0989d3b869c4a014d10ea98193b7c3b32
diff --git a/examples/tutorial-perf-serde-03.rs b/examples/tutorial-perf-serde-03.rs
new file mode 100644
index 0000000..8c8b5f2
--- /dev/null
+++ b/examples/tutorial-perf-serde-03.rs
@@ -0,0 +1,44 @@
+use std::error::Error;
+use std::io;
+use std::process;
+
+use serde::Deserialize;
+
+#[derive(Debug, Deserialize)]
+#[serde(rename_all = "PascalCase")]
+struct Record<'a> {
+ country: &'a [u8],
+ city: &'a [u8],
+ accent_city: &'a [u8],
+ region: &'a [u8],
+ population: Option<u64>,
+ latitude: f64,
+ longitude: f64,
+}
+
+fn run() -> Result<u64, Box<dyn Error>> {
+ let mut rdr = csv::Reader::from_reader(io::stdin());
+ let mut raw_record = csv::ByteRecord::new();
+ let headers = rdr.byte_headers()?.clone();
+
+ let mut count = 0;
+ while rdr.read_byte_record(&mut raw_record)? {
+ let record: Record = raw_record.deserialize(Some(&headers))?;
+ if record.country == b"us" && record.region == b"MA" {
+ count += 1;
+ }
+ }
+ Ok(count)
+}
+
+fn main() {
+ match run() {
+ Ok(count) => {
+ println!("{}", count);
+ }
+ Err(err) => {
+ println!("{}", err);
+ process::exit(1);
+ }
+ }
+}