Enum StreamChunk 

pub enum StreamChunk {
    Content(String),
    Reasoning(String),
    ToolCall(ToolCall),
    Usage(Usage),
    FinishReason(String),
    Error(String),
    Done,
}

A chunk received from an SSE streaming response.

Variants

Content(String)

Text content

Reasoning(String)

Reasoning/thinking content

ToolCall(ToolCall)

A tool call

Usage(Usage)

Token usage information

FinishReason(String)

The model’s reported finish reason for this turn (e.g. "stop", "length", "tool_calls"). Emitted at most once per stream when the backend includes it on the SSE choice; consumers that don’t care can safely ignore it.

Error(String)

The provider sent an error event mid-stream (e.g. an OpenAI-style {"error": {...}} object). Carries the error message.

Done

Stream is complete

Trait Implementations

impl Clone for StreamChunk

fn clone(&self) -> StreamChunk

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StreamChunk

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.