Struct stdweb::DiscardOnDrop

#[must_use = "\n\n     The DiscardOnDrop is unused, which causes it to be immediately discarded.\n     You probably don\'t want that to happen.\n\n     How to fix this:\n\n       * Store the DiscardOnDrop in a variable or data structure.\n\n       * Or use the leak() method which will cause it to not be\n         discarded (this will usually leak memory!)\n\n     See the documentation for more details.\n"]
pub struct DiscardOnDrop<A: Discard>(_);

If you have a value which implements Discard, you can use DiscardOnDrop::new(value) which will wrap the value. When the wrapper is dropped it will automatically call value.discard().

You can use the leak method to unwrap it (which returns value). This causes it to no longer call discard when it is dropped, which means it will usually leak memory unless you manually call discard.

Methods

impl<A: Discard> DiscardOnDrop<A>

pub fn new(discarder: A) -> Self

Creates a new DiscardOnDrop.

When the DiscardOnDrop is dropped it will automatically call discarder.discard().

pub fn leak(self) -> A

Returns the wrapped discarder.

It will no longer automatically call discarder.discard(), so this will usually leak memory unless you manually call discarder.discard().

Trait Implementations

impl<A: Debug + Discard> Debug for DiscardOnDrop<A>

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

Formats the value using the given formatter.

impl<A: Discard> Deref for DiscardOnDrop<A>

type Target = A

The resulting type after dereferencing.

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

Dereferences the value.

impl<A: Discard> DerefMut for DiscardOnDrop<A>

fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.