Enum StreamChunk 

pub enum StreamChunk {
    TextDelta {
        delta: String,
    },
    ToolCallStart {
        id: String,
        name: String,
    },
    ToolCallArgsDelta {
        id: String,
        delta: String,
    },
    ToolCallEnd {
        id: String,
    },
    Usage(TokenUsage),
    End {
        finish_reason: FinishReason,
    },
}

One incremental event from a streaming LLM call.

Ordering guarantees:

• TextDelta chunks appear in the order they should be concatenated.
• For a given tool-call id, events arrive as ToolCallStart → ToolCallArgsDelta* → ToolCallEnd.
• Usage (if present) and End are the last two chunks of a successful stream. On error the stream terminates with Err(_) and no End.

Variants

TextDelta

Fields

delta: String

ToolCallStart

Fields

id: String

name: String

ToolCallArgsDelta

Fields

id: String

delta: String

ToolCallEnd

Fields

id: String

Usage(TokenUsage)

End

Fields

finish_reason: FinishReason

Implementations

impl StreamChunk

pub fn kind_label(&self) -> &'static str

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.