Struct v8::Context

#[repr(C)]
pub struct Context(_);

A sandboxed execution context with its own set of built-in objects and functions.

Implementations

impl Context

pub fn new<'s>(scope: &mut HandleScope<'s, ()>) -> Local<'s, Context>

Creates a new context.

pub fn new_from_template<'s>(
    scope: &mut HandleScope<'s, ()>,
    templ: Local<'_, ObjectTemplate>
) -> Local<'s, Context>

Creates a new context using the object template as the template for the global object.

pub fn get_extras_binding_object<'s>(
    &self,
    scope: &mut HandleScope<'s, ()>
) -> Local<'s, Object>

pub fn global<'s>(&self, scope: &mut HandleScope<'s, ()>) -> Local<'s, Object>

Returns the global proxy object.

Global proxy object is a thin wrapper whose prototype points to actual context’s global object with the properties like Object, etc. This is done that way for security reasons (for more details see https://wiki.mozilla.org/Gecko:SplitWindow).

Please note that changes to global proxy object prototype most probably would break VM—v8 expects only global object as a prototype of global proxy object.

pub fn set_promise_hooks(
    &self,
    init_hook: Local<'_, Function>,
    before_hook: Local<'_, Function>,
    after_hook: Local<'_, Function>,
    resolve_hook: Local<'_, Function>
)

pub fn get_slot<'a, T: 'static>(
    &'a self,
    isolate: &'a mut Isolate
) -> Option<&'a T>

Get a reference to embedder data added with Self::set_slot().

pub fn get_slot_mut<'a, T: 'static>(
    &'a self,
    isolate: &'a mut Isolate
) -> Option<&'a mut T>

Get a mutable reference to embedder data added with Self::set_slot().

pub fn set_slot<'a, T: 'static>(
    &'a self,
    isolate: &'a mut Isolate,
    value: T
) -> bool

Use with Context::get_slot and Context::get_slot_mut to associate state with a Context.

This method gives ownership of value to the Context. Exactly one object of each type can be associated with a Context. If called more than once with an object of the same type, the earlier version will be dropped and replaced.

Returns true if value was set without replacing an existing value.

The value will be dropped when the context is garbage collected.

pub fn remove_slot<'a, T: 'static>(
    &'a self,
    isolate: &'a mut Isolate
) -> Option<T>

Removes the embedder data added with Self::set_slot() and returns it if it exists.

pub fn clear_all_slots<'a>(&'a self, isolate: &'a mut Isolate)

Removes all embedder data added with Self::set_slot(), and deletes any internal state needed to keep track of such slots.

This is needed to make a snapshot with SnapshotCreator, since the internal embedder state uses Weak handles, which cannot be alive at the time of snapshotting.

Methods from Deref<Target = Data>

pub fn is_big_int(&self) -> bool

Returns true if this data is a BigInt.

pub fn is_boolean(&self) -> bool

Returns true if this data is a Boolean.

pub fn is_context(&self) -> bool

Returns true if this data is a Context.

pub fn is_fixed_array(&self) -> bool

Returns true if this data is a FixedArray.

pub fn is_function_template(&self) -> bool

Returns true if this data is a FunctionTemplate.

pub fn is_module(&self) -> bool

Returns true if this data is a Module.

pub fn is_module_request(&self) -> bool

Returns true if this data is a ModuleRequest.

pub fn is_name(&self) -> bool

Returns true if this data is a Name.

pub fn is_number(&self) -> bool

Returns true if this data is a Number.

pub fn is_object_template(&self) -> bool

Returns true if this data is a ObjectTemplate.

pub fn is_primitive(&self) -> bool

Returns true if this data is a Primitive.

pub fn is_private(&self) -> bool

Returns true if this data is a Private.

pub fn is_string(&self) -> bool

Returns true if this data is a String.

pub fn is_symbol(&self) -> bool

Returns true if this data is a Symbol.

pub fn is_value(&self) -> bool

Returns true if this data is a Value.

Trait Implementations

impl Debug for Context

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

Formats the value using the given formatter.

impl Deref for Context

type Target = Data

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl<'s> PartialEq<Context> for Data

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl<'s> PartialEq<Context> for Context

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl<'s> PartialEq<Data> for Context

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

This method tests for self and other values to be equal, and is used by ==.

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

This method tests for !=.

impl Eq for Context