Macro fetch_next_optional_message_from_stream

macro_rules! fetch_next_optional_message_from_stream {
    ($stream:expr, $field:ident) => { ... };
}

Fetches next message from a stream.

Parameters

• stream: tonic::Streaming typed input stream
• field: Input field ident (struct member) to look in the next message

Returns

An Option containing the next message. Will return a None variant if stream has exhausted.