[−][src]Struct stdweb::Once
A wrapper for passing FnOnce
callbacks into the js!
macro.
Since it only supports FnOnce
callbacks there is no need to
drop()
them manually on the JavaScript side provided they
were actually called.
You still need to drop()
any callbacks which were not called.
Examples
let callback = || { println!( "Hello world!" ); }; js! { var cb = @{Once(callback)}; cb(); // There is no need to drop it; since the function // is only callable once it automatically drops // itself after being called. }
Trait Implementations
Auto Trait Implementations
Blanket Implementations
impl<T, U> Into for T where
U: From<T>,
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U: From<T>,
impl<T> From for T
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impl<T, U> TryFrom for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T> Borrow for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut for T where
T: ?Sized,
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T: ?Sized,
fn borrow_mut(&mut self) -> &mut T
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impl<T, U> TryInto for T where
U: TryFrom<T>,
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U: TryFrom<T>,
type Error = <U as TryFrom<T>>::Error
The type returned in the event of a conversion error.
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>
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impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,