Enum VarScope 

pub enum VarScope {
    Chapter,
    Book,
    Source,
}

多步编排:捕获变量的作用域(三级级联 章节→书籍→书源,见 design D7-bis)。 默认 Chapter——最短寿命、零持久、零跨书外溢;get 时按 章节→书籍→书源 取第一个非空。

Variants

Chapter

仅本次 op 调用(search/explore/bookInfo/toc/content)内存活,调用结束消亡(默认)。 一次性 csrf/sign/cursor 用它。

Book

随 per-book 快照持久化(由 app 注入·导出);如详情/列表 token 复用到 toc/content。 注意:search/explore 的 prelude 阶段尚无 per-book 载体(用户选书后才建 per-book 引擎), 在那里用 book 会写进会被丢弃的实例 → 静默无效;search 阶段的 token 请用 source/chapter。

Source

书源级长存(引擎内跨 op 共享);如全站 API host/版本/全站 csrf。 跨会话持久仅在 app 接线落盘时保证(默认构建为进程内)。

Trait Implementations

impl Clone for VarScope

fn clone(&self) -> VarScope

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for VarScope

impl Debug for VarScope

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

Formats the value using the given formatter.

impl Default for VarScope

fn default() -> VarScope

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for VarScope

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for VarScope

impl Hash for VarScope

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for VarScope

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for VarScope

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 VarScope