Struct wasmtime_environ::__core::ops::RangeFull

1.0.0 · source · [−]

pub struct RangeFull;

Expand description

An unbounded range (..).

RangeFull is primarily used as a slicing index, its shorthand is ... It cannot serve as an Iterator because it doesn’t have a starting point.

Examples

The .. syntax is a RangeFull:

assert_eq!((..), std::ops::RangeFull);

It does not have an IntoIterator implementation, so you can’t use it in a for loop directly. This won’t compile:

for i in .. {
    // ...
}

Used as a slicing index, RangeFull produces the full array as a slice.

let arr = [0, 1, 2, 3, 4];
assert_eq!(arr[ ..  ], [0, 1, 2, 3, 4]); // This is the `RangeFull`
assert_eq!(arr[ .. 3], [0, 1, 2      ]);
assert_eq!(arr[ ..=3], [0, 1, 2, 3   ]);
assert_eq!(arr[1..  ], [   1, 2, 3, 4]);
assert_eq!(arr[1.. 3], [   1, 2      ]);
assert_eq!(arr[1..=3], [   1, 2, 3   ]);

Trait Implementations

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impl Clone for RangeFull

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fn clone(&self) -> RangeFull

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 RangeFull

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

Formats the value using the given formatter. Read more

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impl Default for RangeFull

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fn default() -> RangeFull

Returns the “default value” for a type. Read more

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impl Hash for RangeFull

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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,

Feeds a slice of this type into the given Hasher. Read more

1.7.0 · source

impl Index<RangeFull> for CString

fn index(&self, _index: RangeFull) -> &CStr

Performs the indexing (container[index]) operation. Read more

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impl Index<RangeFull> for OsString

fn index(&self, _index: RangeFull) -> &OsStr

Performs the indexing (container[index]) operation. Read more

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impl Index<RangeFull> for String

fn index(&self, _index: RangeFull) -> &str

Performs the indexing (container[index]) operation. Read more

1.44.0 · source

impl IndexMut<RangeFull> for OsString

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fn index_mut(&mut self, _index: RangeFull) -> &mut OsStr

Performs the mutable indexing (container[index]) operation. Read more

1.3.0 · source

impl IndexMut<RangeFull> for String

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fn index_mut(&mut self, _index: RangeFull) -> &mut str

Performs the mutable indexing (container[index]) operation. Read more

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impl PartialEq<RangeFull> for RangeFull

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

This method tests for self and other values to be equal, and is used by ==. Read more

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

This method tests for !=.

1.28.0 · source

impl<T> RangeBounds<T> for RangeFull where
T: ?Sized,

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fn start_bound(&self) -> Bound<&T>

Start index bound. Read more

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fn end_bound(&self) -> Bound<&T>

End index bound. Read more

1.35.0 · source

fn contains(&self, item: &U) -> bool where
T: PartialOrd,
U: PartialOrd<T> + ?Sized,

Returns true if item is contained in the range. Read more

1.15.0 (const: unstable) · source

impl<T> SliceIndex<[T]> for RangeFull

type Output = [T]

The output type returned by methods.

const: unstable · source

fn get(self, slice: &[T]) -> Option<&[T]>

🔬 This is a nightly-only experimental API. (slice_index_methods)

Returns a shared reference to the output at this location, if in bounds. Read more

const: unstable · source

fn get_mut(self, slice: &mut [T]) -> Option<&mut [T]>

🔬 This is a nightly-only experimental API. (slice_index_methods)

Returns a mutable reference to the output at this location, if in bounds. Read more

const: unstable · source

unsafe fn get_unchecked(self, slice: const [T]) -> const [T]

🔬 This is a nightly-only experimental API. (slice_index_methods)

Returns a shared reference to the output at this location, without performing any bounds checking. Calling this method with an out-of-bounds index or a dangling slice pointer is undefined behavior even if the resulting reference is not used. Read more

const: unstable · source

unsafe fn get_unchecked_mut(self, slice: mut [T]) -> mut [T]

🔬 This is a nightly-only experimental API. (slice_index_methods)

Returns a mutable reference to the output at this location, without performing any bounds checking. Calling this method with an out-of-bounds index or a dangling slice pointer is undefined behavior even if the resulting reference is not used. Read more

const: unstable · source

fn index(self, slice: &[T]) -> &[T]ⓘNotable traits for &'_ [u8 ]`impl<'_> Read for &'_ [u8]impl<'_> Write for &'_ mut [u8]`

🔬 This is a nightly-only experimental API. (slice_index_methods)

Returns a shared reference to the output at this location, panicking if out of bounds. Read more

const: unstable · source

fn index_mut(self, slice: &mut [T]) -> &mut [T]ⓘNotable traits for &'_ [u8 ]`impl<'_> Read for &'_ [u8]impl<'_> Write for &'_ mut [u8]`

🔬 This is a nightly-only experimental API. (slice_index_methods)

Returns a mutable reference to the output at this location, panicking if out of bounds. Read more

1.20.0 (const: unstable) · source

impl SliceIndex<str> for RangeFull

Implements substring slicing with syntax &self[..] or &mut self[..].

Returns a slice of the whole string, i.e., returns &self or &mut self. Equivalent to &self[0 .. len] or &mut self[0 .. len]. Unlike other indexing operations, this can never panic.

This operation is O(1).

Prior to 1.20.0, these indexing operations were still supported by direct implementation of Index and IndexMut.

Equivalent to &self[0 .. len] or &mut self[0 .. len].

type Output = str

The output type returned by methods.

const: unstable · source

fn get(self, slice: &str) -> Option<&<RangeFull as SliceIndex<str>>::Output>

🔬 This is a nightly-only experimental API. (slice_index_methods)

Returns a shared reference to the output at this location, if in bounds. Read more

const: unstable · source

fn get_mut(
self,
slice: &mut str
) -> Option<&mut <RangeFull as SliceIndex<str>>::Output>

🔬 This is a nightly-only experimental API. (slice_index_methods)

Returns a mutable reference to the output at this location, if in bounds. Read more

const: unstable · source

unsafe fn get_unchecked(
self,
slice: const str
) -> const <RangeFull as SliceIndex<str>>::Output

🔬 This is a nightly-only experimental API. (slice_index_methods)

Returns a shared reference to the output at this location, without performing any bounds checking. Calling this method with an out-of-bounds index or a dangling slice pointer is undefined behavior even if the resulting reference is not used. Read more

const: unstable · source

unsafe fn get_unchecked_mut(
self,
slice: mut str
) -> mut <RangeFull as SliceIndex<str>>::Output

🔬 This is a nightly-only experimental API. (slice_index_methods)

Returns a mutable reference to the output at this location, without performing any bounds checking. Calling this method with an out-of-bounds index or a dangling slice pointer is undefined behavior even if the resulting reference is not used. Read more

const: unstable · source