Enum async_std::path::Component

1.0.0 · source ·
pub enum Component<'a> {
    Prefix(PrefixComponent<'a>),
    RootDir,
    CurDir,
    ParentDir,
    Normal(&'a OsStr),
}
Expand description

A single component of a path.

A Component roughly corresponds to a substring between path separators (/ or \).

This enum is created by iterating over Components, which in turn is created by the components method on Path.

Examples

use std::path::{Component, Path};

let path = Path::new("/tmp/foo/bar.txt");
let components = path.components().collect::<Vec<_>>();
assert_eq!(&components, &[
    Component::RootDir,
    Component::Normal("tmp".as_ref()),
    Component::Normal("foo".as_ref()),
    Component::Normal("bar.txt".as_ref()),
]);

Variants§

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Prefix(PrefixComponent<'a>)

A Windows path prefix, e.g., C: or \\server\share.

There is a large variety of prefix types, see Prefix’s documentation for more.

Does not occur on Unix.

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RootDir

The root directory component, appears after any prefix and before anything else.

It represents a separator that designates that a path starts from root.

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CurDir

A reference to the current directory, i.e., ..

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ParentDir

A reference to the parent directory, i.e., ...

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Normal(&'a OsStr)

A normal component, e.g., a and b in a/b.

This variant is the most common one, it represents references to files or directories.

Implementations§

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impl<'a> Component<'a>

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pub fn as_os_str(self) -> &'a OsStr

Extracts the underlying OsStr slice.

Examples
use std::path::Path;

let path = Path::new("./tmp/foo/bar.txt");
let components: Vec<_> = path.components().map(|comp| comp.as_os_str()).collect();
assert_eq!(&components, &[".", "tmp", "foo", "bar.txt"]);

Trait Implementations§

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impl<'a> Arg for Component<'a>

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fn as_str(&self) -> Result<&str, Errno>

Returns a view of this string as a string slice.
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fn to_string_lossy(&self) -> Cow<'_, str>

Returns a potentially-lossy rendering of this string as a Cow<'_, str>.
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fn as_cow_c_str(&self) -> Result<Cow<'_, CStr>, Errno>

Returns a view of this string as a maybe-owned CStr.
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fn into_c_str<'b>(self) -> Result<Cow<'b, CStr>, Errno>
where Component<'a>: 'b,

Consumes self and returns a view of this string as a maybe-owned CStr.
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fn into_with_c_str<T, F>(self, f: F) -> Result<T, Errno>
where Component<'a>: Sized, F: FnOnce(&CStr) -> Result<T, Errno>,

Runs a closure with self passed in as a &CStr.
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impl<'a> Arg for Component<'a>

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fn as_str(&self) -> Result<&str, Errno>

Returns a view of this string as a string slice.
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fn to_string_lossy(&self) -> Cow<'_, str>

Returns a potentially-lossy rendering of this string as a Cow<'_, str>.
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fn as_cow_c_str(&self) -> Result<Cow<'_, CStr>, Errno>

Returns a view of this string as a maybe-owned CStr.
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fn into_c_str<'b>(self) -> Result<Cow<'b, CStr>, Errno>
where Component<'a>: 'b,

Consumes self and returns a view of this string as a maybe-owned CStr.
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fn into_with_c_str<T, F>(self, f: F) -> Result<T, Errno>
where Component<'a>: Sized, F: FnOnce(&CStr) -> Result<T, Errno>,

Runs a closure with self passed in as a &CStr.
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impl AsRef<OsStr> for Component<'_>

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fn as_ref(&self) -> &OsStr

Converts this type into a shared reference of the (usually inferred) input type.
1.25.0 · source§

impl AsRef<Path> for Component<'_>

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fn as_ref(&self) -> &Path

Converts this type into a shared reference of the (usually inferred) input type.
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impl AsRef<Path> for Component<'_>

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fn as_ref(&self) -> &Path

Converts this type into a shared reference of the (usually inferred) input type.
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impl<'a> Clone for Component<'a>

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fn clone(&self) -> Component<'a>

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<'a> Debug for Component<'a>

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

Formats the value using the given formatter. Read more
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impl<'a> Hash for Component<'a>

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

Feeds this value into the given Hasher. Read more
1.3.0 · source§

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

Feeds a slice of this type into the given Hasher. Read more
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impl<'a> Ord for Component<'a>

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fn cmp(&self, other: &Component<'a>) -> Ordering

This method returns an Ordering between self and other. Read more
1.21.0 · source§

fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
1.21.0 · source§

fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
1.50.0 · source§

fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
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impl<'a> PartialEq for Component<'a>

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fn eq(&self, other: &Component<'a>) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<'a> PartialOrd for Component<'a>

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fn partial_cmp(&self, other: &Component<'a>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl<'a> Copy for Component<'a>

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impl<'a> Eq for Component<'a>

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impl<'a> StructuralEq for Component<'a>

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impl<'a> StructuralPartialEq for Component<'a>

Auto Trait Implementations§

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impl<'a> RefUnwindSafe for Component<'a>

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impl<'a> Send for Component<'a>

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impl<'a> Sync for Component<'a>

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impl<'a> Unpin for Component<'a>

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impl<'a> UnwindSafe for Component<'a>

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> 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> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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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.
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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more