Trait ExtractFromJs

pub trait ExtractFromJs<'a>: Sized {
    // Required method
    fn extract(js_cb: &'a mut JsCallback) -> Result<Self, NjError>;

    // Provided method
    fn label() -> &'static str { ... }
}

#[deprecated(since = “4.1.0”,“No longer used”]

Required Methods

fn extract(js_cb: &'a mut JsCallback) -> Result<Self, NjError>

extract from js callback

Provided Methods

fn label() -> &'static str

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl<'a, T> ExtractFromJs<'a> for Option<T>

where T: JSValue<'a>,

for optional argument

fn label() -> &'static str

fn extract(js_cb: &'a mut JsCallback) -> Result<Option<T>, NjError>

Implementors

impl ExtractFromJs<'_> for JsEnv

impl<'a, T> ExtractFromJs<'a> for T

where T: JSValue<'a>,