Struct axstd::fs::OpenOptions

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pub struct OpenOptions(/* private fields */);
Available on crate feature fs only.
Expand description

Options and flags which can be used to configure how a file is opened.

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impl OpenOptions

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pub const fn new() -> Self

Creates a blank new set of options ready for configuration.

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

Sets the option for read access.

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

Sets the option for write access.

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

Sets the option for the append mode.

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

Sets the option for truncating a previous file.

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

Sets the option to create a new file, or open it if it already exists.

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

Sets the option to create a new file, failing if it already exists.

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pub fn open(&self, path: &str) -> Result<File>

Opens a file at path with the options specified by self.

Trait Implementations§

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impl Clone for OpenOptions

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fn clone(&self) -> OpenOptions

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for OpenOptions

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

Formats the value using the given formatter. Read more

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> AsAny for T
where T: Any,

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fn as_any(&self) -> &(dyn Any + 'static)

把当前对象转化为 Any 类型,供后续 downcast 使用
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fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

供 downcast_mut 使用
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.