Enum FileAccessMode 

#[non_exhaustive]
pub enum FileAccessMode {
    Read,
    Write,
    WriteTruncate,
    WriteAppend,
    ReadWrite,
    ReadWriteTruncate,
}

Access mode

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Read

Opens the file in read-only mode.

FileDescriptor mode: “r”

Write

👎Deprecated: This may or may not truncate existing contents. So please use WriteTruncate or WriteAppend instead.

Opens the file in write-only mode.
This may or may not truncate existing contents.
So please use FileAccessMode::WriteTruncate or FileAccessMode::WriteAppend instead.

FileDescriptor mode: “w”

WriteTruncate

Opens the file in write-only mode. The existing content is truncated (deleted), and new data is written from the beginning. Creates a new file if it does not exist.

FileDescriptor mode: “wt”

WriteAppend

Opens the file in write-only mode. The existing content is preserved, and new data is appended to the end of the file. Creates a new file if it does not exist.

FileDescriptor mode: “wa”

ReadWrite

Opens the file in read-write mode.

FileDescriptor mode: “rw”

ReadWriteTruncate

Opens the file in read-write mode. The existing content is truncated (deleted), and new data is written from the beginning. Creates a new file if it does not exist.

FileDescriptor mode: “rwt”

Trait Implementations

impl Clone for FileAccessMode

fn clone(&self) -> FileAccessMode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FileAccessMode

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for FileAccessMode

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for FileAccessMode

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 FileAccessMode

fn eq(&self, other: &FileAccessMode) -> 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 Serialize for FileAccessMode

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for FileAccessMode

impl Eq for FileAccessMode

impl StructuralPartialEq for FileAccessMode