Struct StreamingResult 

pub struct StreamingResult {
    pub content: String,
    pub tool_calls: Vec<Value>,
    pub usage: TokenUsage,
    pub api_error: Option<String>,
    pub ttft_ms: Option<u64>,
    pub stop_reason: Option<String>,
    pub cost: f64,
    pub message_started: bool,
    pub content_blocks_started: u32,
    pub content_blocks_completed: u32,
    pub any_tool_use_completed: bool,
    pub research: Option<Value>,
}

Streaming result containing accumulated content, tool calls, and metadata. Matches TypeScript’s partialMessage + newMessages + usage + cost accumulation.

Fields

content: String

Accumulated text content from all content blocks

tool_calls: Vec<Value>

Accumulated tool calls (completed tool_use blocks)

usage: TokenUsage

Token usage information

api_error: Option<String>

API error type if any (e.g., “max_output_tokens”, “prompt_too_long”)

ttft_ms: Option<u64>

Time to first token in milliseconds

stop_reason: Option<String>

The stop_reason from message_delta (e.g., “end_turn”, “tool_use”, “max_tokens”)

cost: f64

Total cost in USD for this request

message_started: bool

Whether message_start event was received

content_blocks_started: u32

Number of content blocks that were started

content_blocks_completed: u32

Number of content blocks that were completed

any_tool_use_completed: bool

Whether any tool_use blocks were completed

research: Option<Value>

Research data from message_start (internal only, for ant userType)

Trait Implementations

impl Clone for StreamingResult

fn clone(&self) -> StreamingResult

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StreamingResult

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

Formats the value using the given formatter.

impl Default for StreamingResult

fn default() -> Self

Returns the “default value” for a type.