1 files changed, 24 insertions, 0 deletions
diff --git a/third_party/rust/scroll/examples/data_ctx.rs b/third_party/rust/scroll/examples/data_ctx.rs
new file mode 100644
index 0000000000..667f4b18f0
--- /dev/null
+++ b/third_party/rust/scroll/examples/data_ctx.rs
@@ -0,0 +1,24 @@
+use scroll::{ctx, Endian, Pread, BE};
+
+#[derive(Debug)]
+struct Data<'a> {
+    name: &'a str,
+    id: u32,
+}
+
+impl<'a> ctx::TryFromCtx<'a, Endian> for Data<'a> {
+    type Error = scroll::Error;
+    fn try_from_ctx(src: &'a [u8], endian: Endian) -> Result<(Self, usize), Self::Error> {
+        let name = src.pread::<&'a str>(0)?;
+        let id = src.pread_with(name.len() + 1, endian)?;
+        Ok((Data { name: name, id: id }, name.len() + 4))
+    }
+}
+
+fn main() {
+    let bytes = b"UserName\x00\x01\x02\x03\x04";
+    let data = bytes.pread_with::<Data>(0, BE).unwrap();
+    assert_eq!(data.id, 0x01020304);
+    assert_eq!(data.name.to_string(), "UserName".to_string());
+    println!("Data: {:?}", &data);
+}