Expand description
extern
qualifier on a function item or function type.
Variants
None
Implicit(Span)
Explicit(StrLit, Span)
Implementations
Trait Implementations
Auto Trait Implementations
impl RefUnwindSafe for Extern
impl !Send for Extern
impl !Sync for Extern
impl Unpin for Extern
impl UnwindSafe for Extern
Blanket Implementations
sourceimpl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
Layout
Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...)
attributes. Please see the Rust Reference’s “Type Layout” chapter for details on type layout guarantees.
Size: 32 bytes
Size for each variant:
None
: 0 bytesImplicit
: 12 bytesExplicit
: 32 bytes