Type Alias EnsureCanAddPrivateElementOp 

pub type EnsureCanAddPrivateElementOp = Option<unsafe extern "C" fn(cx: *mut JSContext, val: HandleValue) -> bool>;

Install an context wide callback that implements the ECMA262 specification host hook HostEnsureCanAddPrivateElement.

This hook, which should only be overriden for Web Browsers, examines the provided object to determine if the addition of a private field is allowed, throwing an exception and returning false if not.

The default implementation of this hook, which will be used unless overriden, examines only proxy objects, and throws if the proxy handler returns true from the handler method throwOnPrivateField().

Aliased Type

pub enum EnsureCanAddPrivateElementOp {
    None,
    Some(unsafe extern "C" fn(*mut JSContext, Handle<Value>) -> bool),
}

Variants

None

No value.

Some(unsafe extern "C" fn(*mut JSContext, Handle<Value>) -> bool)

Some value of type T.

Layout

Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.