jhorstmann commented on a change in pull request #9212:
URL: https://github.com/apache/arrow/pull/9212#discussion_r559251445
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File path: rust/arrow/src/datatypes.rs
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@@ -199,11 +199,18 @@ pub struct Field {
metadata: Option<BTreeMap<String, String>>,
}
-pub trait ArrowNativeType:
- fmt::Debug + Send + Sync + Copy + PartialOrd + FromStr + Default + 'static
-{
+/// Trait declaring any type that is serializable to JSON. This includes all
primitive types (bool, i32, etc.).
+pub trait JsonSerializable: 'static {
fn into_json_value(self) -> Option<Value>;
+}
+/// Trait expressing a Rust type that has the same in-memory representation
+/// as Arrow. This includes `i16`, `f32`, but excludes `bool` (which in arrow
is represented in bits).
+/// In little endian machines, types that implement [`ArrowNativeType`] can be
memcopied to arrow buffers
Review comment:
Does the in-memory format require little-endian? I'd expect conversion
to happen when reading data into memory, which should make memcpy work on bot
LE and BE machines. Assuming absence of other endianness bugs of course.
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