Enum WriteMode

pub enum WriteMode {
    AlwaysAppend,
    AppendOrCreate,
    CreateOrTruncate,
    AlwaysCreate,
    Atomic,
}

      File Already Exists    File Does not Exist

    AA       Append                  Dies
   AoC       Append                 Create
   CoT      Truncate                Create
    AC        Dies                  Create

Atomic is like CreateOrTruncate, but it tries to be more atomic. It first creates a tmp file with a different name, then renames the tmp file. If it fails, it might leave a tmp file. But you’ll never have a partially written file.

Variants

AlwaysAppend

AppendOrCreate

CreateOrTruncate

AlwaysCreate

Atomic

Trait Implementations

impl Clone for WriteMode

fn clone(&self) -> WriteMode

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for WriteMode

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

Formats the value using the given formatter.

impl From<WriteMode> for OpenOptions

fn from(m: WriteMode) -> OpenOptions

Converts to this type from the input type.

impl Hash for WriteMode

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for WriteMode

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for WriteMode

impl Eq for WriteMode

impl StructuralPartialEq for WriteMode