Struct StreamChunk 

pub struct StreamChunk {
    pub meta: CompletionMeta,
    pub choices: Vec<Choice>,
    pub usage: Option<Usage>,
}

A streaming chat completion chunk

Fields

meta: CompletionMeta

Completion metadata

choices: Vec<Choice>

The list of completion choices (with delta content)

usage: Option<Usage>

Token usage statistics (only in final chunk)

Implementations

impl StreamChunk

pub fn tool(calls: &[ToolCall]) -> Self

Create a new tool chunk

pub fn text(content: String) -> Self

Create a content-only chunk with the given text.

pub fn separator() -> Self

Create a separator chunk (newline) emitted between tool-call rounds.

pub fn content(&self) -> Option<&str>

Get the content of the first choice

pub fn reasoning_content(&self) -> Option<&str>

Get the reasoning content of the first choice

pub fn tool_calls(&self) -> Option<&[ToolCall]>

Get the tool calls of the first choice

pub fn reason(&self) -> Option<&FinishReason>

Get the reason the model stopped generating

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.

impl Default for StreamChunk

fn default() -> StreamChunk

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for StreamChunk

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.