Enum StreamEvent 

pub enum StreamEvent {
    ContentDelta {
        delta: String,
    },
    ToolCallDelta {
        index: usize,
        id: Option<String>,
        function_name: Option<String>,
        arguments_delta: String,
    },
    ThinkingDelta {
        delta: String,
    },
    ImageDelta {
        media_type: String,
        delta: String,
    },
    Usage {
        usage: TokenUsage,
    },
    Done {
        finish_reason: FinishReason,
        usage: Option<TokenUsage>,
    },
    SignatureDelta {
        signature: String,
    },
    CitationsDelta {
        citations: Value,
    },
    RedactedThinkingDelta {
        data: String,
    },
    Custom {
        event: String,
        data: Value,
    },
}

流式响应事件类型

Variants

ContentDelta

文本内容增量

Fields

delta: String

ToolCallDelta

工具调用增量 —— 函数名和参数片段逐步拼接

Fields

index: usize

id: Option<String>

function_name: Option<String>

arguments_delta: String

ThinkingDelta

思考过程增量（Claude extended thinking、DeepSeek reasoning）

Fields

delta: String

ImageDelta

图像增量（Gemini 图像生成等多模态输出场景）

Fields

media_type: String

delta: String

Usage

Token 用量更新

Fields

usage: TokenUsage

Done

流结束信号

Fields

finish_reason: FinishReason

usage: Option<TokenUsage>

SignatureDelta

签名增量（模型输出签名，用于验证）

Fields

signature: String

CitationsDelta

引用来源增量

Fields

citations: Value

RedactedThinkingDelta

隐式思考过程增量（redacted thinking，API 返回已删节版本）

Fields

data: String

Custom

Provider 特有的事件（可扩展）

Fields

event: String

data: Value

Trait Implementations

impl Clone for StreamEvent

fn clone(&self) -> StreamEvent

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StreamEvent

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for StreamEvent

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for StreamEvent

fn eq(&self, other: &StreamEvent) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl Serialize for StreamEvent

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for StreamEvent