1 files changed, 51 insertions, 0 deletions
diff --git a/examples/csv_vectors.rs b/examples/csv_vectors.rs
new file mode 100644
index 0000000..95e4398
--- /dev/null
+++ b/examples/csv_vectors.rs
@@ -0,0 +1,51 @@
+extern crate csv;
+extern crate serde;
+#[macro_use]
+extern crate serde_derive;
+extern crate serde_qs as qs;
+
+#[derive(Debug, Deserialize, Serialize)]
+struct Query {
+    #[serde(deserialize_with="from_csv")]
+    r: Vec<u8>,
+    s: u8,
+}
+
+fn main() {
+    let q = "s=12&r=1,2,3";
+    let q: Query = qs::from_str(&q).unwrap();
+    println!("{:?}", q);
+}
+
+
+fn from_csv<D>(deserializer: D) -> Result<Vec<u8>, D::Error>
+    where D: serde::Deserializer
+{
+    deserializer.deserialize_str(CSVVecVisitor)
+}
+
+/// Visits a string value of the form "v1,v2,v3" into a vector of bytes Vec<u8>
+struct CSVVecVisitor;
+
+impl serde::de::Visitor for CSVVecVisitor {
+    type Value = Vec<u8>;
+
+    fn expecting(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
+        write!(formatter, "a str")
+    }
+
+    fn visit_str<E>(self, s: &str) -> std::result::Result<Self::Value, E>
+        where E: serde::de::Error
+    {
+        let mut output = Vec::new();
+        let mut items = csv::Reader::from_string(s);
+        // let items = items.next_str();
+        while let csv::NextField::Data(item) = items.next_str() {
+            output.push(u8::from_str_radix(item, 10).unwrap());
+        }
+
+        Ok(output)
+    }
+
+
+}