Struct RequestOptions 

pub struct RequestOptions {
    pub timeout: Option<Duration>,
    pub cancel: Option<CancellationToken>,
    pub metadata: Option<HashMap<String, Value>>,
}

请求选项 —— 控制平面（告诉 Provider 怎么执行） 与 CompletionRequest 分离，避免超时/取消等控制参数混入序列化数据

Fields

timeout: Option<Duration>

请求级超时。None 表示使用 Provider 默认超时。

cancel: Option<CancellationToken>

取消令牌

metadata: Option<HashMap<String, Value>>

请求级元数据（用于透传 trace_id 等）

Trait Implementations

impl Clone for RequestOptions

fn clone(&self) -> RequestOptions

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RequestOptions

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

Formats the value using the given formatter.

impl Default for RequestOptions

fn default() -> RequestOptions

Returns the “default value” for a type.