Struct OpenOptions 

pub struct OpenOptions { /* private fields */ }

Options for opening a file.

This struct provides a builder-style API for configuring how a file should be opened, similar to std::fs::OpenOptions. The individual flags are stored in a single bitfield and exposed via is_* accessors.

Implementations

impl OpenOptions

pub fn new() -> Self

Create new open options with all flags set to false.

impl OpenOptions

pub fn read(self, value: bool) -> Self

Set the read flag.

pub fn write(self, value: bool) -> Self

Set the write flag.

pub fn create(self, value: bool) -> Self

Set the create flag.

pub fn create_new(self, value: bool) -> Self

Set the create_new flag.

pub fn truncate(self, value: bool) -> Self

Set the truncate flag.

pub fn append(self, value: bool) -> Self

Set the append flag.

impl OpenOptions

pub fn is_read(&self) -> bool

Returns true if the file will be opened for reading.

pub fn is_write(&self) -> bool

Returns true if the file will be opened for writing.

pub fn is_create(&self) -> bool

Returns true if the file will be created if it does not exist.

pub fn is_create_new(&self) -> bool

Returns true if the file must be created new (failing if it exists).

pub fn is_truncate(&self) -> bool

Returns true if the file will be truncated to zero length on open.

pub fn is_append(&self) -> bool

Returns true if writes will be appended to the end of the file.

pub fn read_only() -> Self

Create options for read-only access.

pub fn create_write() -> Self

Create options for creating and writing a new file (truncating if exists).

pub fn create_new_write() -> Self

Create options for creating a new file for writing (fails if exists).

Trait Implementations

impl Clone for OpenOptions

fn clone(&self) -> OpenOptions

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for OpenOptions

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

Formats the value using the given formatter.

impl Default for OpenOptions

fn default() -> OpenOptions

Returns the “default value” for a type.