Trait neon::types::Finalize

source · [−]
pub trait Finalize: Sized {
    fn finalize<'a, C: Context<'a>>(self, _: &mut C) { ... }
}
Expand description

Finalize is executed on the main JavaScript thread and executed immediately before garbage collection. Values contained by a JsBox must implement Finalize.

Examples

Finalize provides a default implementation that does not perform any finalization.

struct Point(f64, f64);

impl Finalize for Point {}

A finalize method may be specified for performing clean-up operations before dropping the contained value.

struct Point(f64, f64);

impl Finalize for Point {
    fn finalize<'a, C: Context<'a>>(self, cx: &mut C) {
        let global = cx.global();
        let emit: Handle<JsFunction> = global
            .get(cx, "emit")
            .unwrap();

        let args = vec![
            cx.string("gc_point").upcast::<JsValue>(),
            cx.number(self.0).upcast(),
            cx.number(self.1).upcast(),
        ];

        emit.call(cx, global, args).unwrap();
    }
}

Provided Methods

Implementations on Foreign Types

Implementors