Struct BraintrustStream 

pub struct BraintrustStream { /* private fields */ }

A stream aggregator that collects streaming chunks and produces a final value.

This follows the JS/Python SDK pattern where streaming responses are collected and aggregated lazily when final_value() is called.

Raw chunks are stored as-is during streaming (non-blocking), and transformation to universal format happens during aggregation (which runs async in a spawned task).

Implementations

impl BraintrustStream

pub fn new() -> Self

Create a new empty stream.

pub fn push(&mut self, value: Value)

Add a raw JSON value to the stream.

Stores the raw chunk as-is for later aggregation. This is non-blocking to avoid adding latency to the streaming hot path. Transformation to universal format happens lazily in aggregate().

pub fn final_value(&mut self) -> Result<&FinalizedStream>

Get the final aggregated value.

This aggregates all chunks into a final response. The result is cached, so subsequent calls return the same value.

pub fn is_empty(&self) -> bool

Check if the stream has any chunks.

Trait Implementations

impl Clone for BraintrustStream

fn clone(&self) -> BraintrustStream

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Default for BraintrustStream

fn default() -> BraintrustStream

Returns the “default value” for a type.