Struct CallbackScope 

pub struct CallbackScope<'s, C = Context> { /* private fields */ }

A CallbackScope can be used to bootstrap a HandleScope and ContextScope inside a callback function that gets called by V8. Bootstrapping a scope inside a callback is the only valid use case of this type; using it in other places leads to undefined behavior, which is also the reason CallbackScope::new() is marked as being an unsafe function.

For some callback types, rusty_v8 internally creates a scope and passes it as an argument to to embedder callback. Eventually we intend to wrap all callbacks in this fashion, so the embedder would never needs to construct a CallbackScope.

A CallbackScope<()>, without context, can be created from:

• &mut Isolate
• &mut OwnedIsolate

A CallbackScope, with context, can be created from:

• Local<Context>
• Local<Message>
• Local<Object>
• Local<Promise>
• Local<SharedArrayBuffer>
• &FunctionCallbackInfo
• &PropertyCallbackInfo
• &PromiseRejectMessage
• &FastApiCallbackOptions

Implementations

impl<'s> CallbackScope<'s>

pub unsafe fn new<P: NewCallbackScope<'s>>( param: P, ) -> ScopeStorage<P::NewScope>

Trait Implementations

impl<C> AsRef<Isolate> for CallbackScope<'_, C>

fn as_ref(&self) -> &Isolate

Converts this type into a shared reference of the (usually inferred) input type.

impl<'s> AsRef<Pin<&'s mut HandleScope<'s, ()>>> for CallbackScope<'s, ()>

fn as_ref(&self) -> &Pin<&'s mut HandleScope<'s, ()>>

Converts this type into a shared reference of the (usually inferred) input type.

impl<'s, C: Debug> Debug for CallbackScope<'s, C>

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

Formats the value using the given formatter.