Enum AllocationMode 

pub enum AllocationMode {
    Extend,
    KeepSize,
}

How file-space allocation affects the logical file length.

Variants

Extend

Reserve the range and extend the file to its end if necessary. Existing bytes are preserved and newly exposed bytes read as zero. The file is never shrunk.

KeepSize

Reserve the range without changing the logical file length, including when allocating beyond EOF.

Trait Implementations

impl Clone for AllocationMode

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for AllocationMode

impl Debug for AllocationMode

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

Formats the value using the given formatter.

impl Default for AllocationMode

fn default() -> Self

Returns the “default value” for a type.

impl Eq for AllocationMode

impl PartialEq for AllocationMode

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for AllocationMode