Enum CacheOutcome 

#[non_exhaustive]
pub enum CacheOutcome {
    NoKey,
    Cached,
    Executed,
}

v1.4.38 audit log 扩展字段：本次 place-order 请求的 cache 结果。

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

NoKey

客户端没传 key，没走幂等 path（backward-compat）

Cached

传了 key，cache hit，返缓存结果（未触发真下单）

Executed

传了 key，cache miss，真执行 + 写 cache

Implementations

impl CacheOutcome

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

Trait Implementations

impl Clone for CacheOutcome

fn clone(&self) -> CacheOutcome

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CacheOutcome

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

Formats the value using the given formatter.

impl Copy for CacheOutcome