Struct MemoryCtx 

pub struct MemoryCtx { /* private fields */ }

Default CtxStorage impl — Arc<Mutex<Value>> wrapper。

Send + Sync かつ &self write OK = Arc<MemoryCtx> で外部 task と共有可能。

Implementations

impl MemoryCtx

pub fn new(ctx: Value) -> Self

Create a new MemoryCtx initialised with ctx.

pub fn shared(ctx: Value) -> Arc<dyn CtxStorage>

Convenience: wrap in Arc<dyn CtxStorage>.

Trait Implementations

impl CtxStorage for MemoryCtx

fn read(&self, path: &str) -> Result<Value, EvalError>

Read a single path ($.a.b.c 形式) from ctx.

fn write(&self, path: &str, value: Value) -> Result<(), EvalError>

Write value to path ($.a.b.c 形式).

fn snapshot(&self) -> Value

Take a snapshot of the entire ctx (= Expr eval / Fanout fork で使う pure read view).

fn replace(&self, value: Value)

Replace the entire ctx with the given value (= Fanout branch restore 等).