prost_reflect/reflect/
mod.rs

1mod wkt;
2
3pub(crate) use wkt::make_wkt_descriptor_pool;
4
5use prost::Message;
6
7use crate::{DynamicMessage, MessageDescriptor};
8
9/// Trait for message types that support reflection.
10pub trait ReflectMessage: Message {
11    /// Gets a [`MessageDescriptor`] describing the type of this message.
12    fn descriptor(&self) -> MessageDescriptor;
13
14    /// Converts this message into an instance of [`DynamicMessage`] by going
15    /// through the byte representation.
16    fn transcode_to_dynamic(&self) -> DynamicMessage
17    where
18        Self: Sized,
19    {
20        let mut message = DynamicMessage::new(self.descriptor());
21        // This can only fail if `self.descriptor` returns a descriptor incompatible with the
22        // actual serialized bytes.
23        message
24            .transcode_from(self)
25            .expect("error converting to dynamic message");
26        message
27    }
28}
29
30impl<M> ReflectMessage for Box<M>
31where
32    M: ReflectMessage,
33{
34    fn descriptor(&self) -> MessageDescriptor {
35        (**self).descriptor()
36    }
37}
38
39#[test]
40fn assert_object_safe() {
41    fn _foo(_: Box<dyn ReflectMessage>) {}
42}