Enum evm::maybe_borrowed::MaybeBorrowed

pub enum MaybeBorrowed<'a, T> {
    Borrowed(&'a mut T),
    Owned(T),
}

Similar to Cow from the standard library, but without requiring T: Clone. Instead of “copy on write”, this data structure represents a type that can create &mut T, either because it is &mut T, or because it is an owned T. This is also distinct from the BorrowMut trait in the standard library because you can have a single collection mix both borrowed and owned data (e.g. let xs: Vec<MaybeBorrowed<'_, T>> = vec![&mut t1, t2] would be possible whereas Vec<B> where B: BorrowMut<T> would need to consist of all owned or all borrowed data).

Variants

Borrowed(&'a mut T)

Owned(T)

Trait Implementations

impl<'a, T: Debug> Debug for MaybeBorrowed<'a, T>

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

Formats the value using the given formatter.

impl<'a, T> Deref for MaybeBorrowed<'a, T>

type Target = T

The resulting type after dereferencing.

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

Dereferences the value.

impl<'a, T> DerefMut for MaybeBorrowed<'a, T>

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

Mutably dereferences the value.