# Enum cargo::util::semver_ext::OptVersionReq

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    pub enum OptVersionReq {
        Any,
        Req(VersionReq),
        Locked(Version, VersionReq),
        Precise(Version, VersionReq),
    }

## Variants§

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### Any

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### Req(VersionReq)

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### Locked(Version, VersionReq)

The exact locked version and the original version requirement.

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### Precise(Version, VersionReq)

The exact requested version and the original version requirement.

This looks identical to `OptVersionReq::Locked` but has a different meaning, and is used for the `--precise` field of `cargo update`. See comments in `OptVersionReq::matches` for more.

## Implementations§

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### impl OptVersionReq

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#### pub fn exact(version: &Version) -> Self

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#### pub fn lock_to_exact(version: &Version) -> Self

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#### pub fn is_exact(&self) -> bool

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#### pub fn lock_to(&mut self, version: &Version)

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#### pub fn precise_to(&mut self, version: &Version)

Makes the requirement precise to the requested version.

This is used for the `--precise` field of `cargo update`.

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#### pub fn is_precise(&self) -> bool

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#### pub fn precise_version(&self) -> Option<&Version>

Gets the version to which this req is precise to, if any.

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#### pub fn is_locked(&self) -> bool

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#### pub fn locked_version(&self) -> Option<&Version>

Gets the version to which this req is locked, if any.

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#### pub fn matches_prerelease(&self, version: &Version) -> bool

Since Semver does not support prerelease versions, the simplest implementation is taken here without comparing the prerelease section. The logic here is temporary, we’ll have to consider more boundary conditions later, and we’re not sure if this part of the functionality should be implemented in semver or cargo.

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#### pub fn matches(&self, version: &Version) -> bool

## Trait Implementations§

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### impl Clone for OptVersionReq

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#### fn clone(&self) -> OptVersionReq

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 OptVersionReq

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

Formats the value using the given formatter. Read more
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### impl Display for OptVersionReq

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

Formats the value using the given formatter. Read more
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### impl From<VersionReq> for OptVersionReq

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#### fn from(req: VersionReq) -> Self

Converts to this type from the input type.
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### impl Hash for OptVersionReq

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

Feeds this value into the given `Hasher`. Read more
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#### 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 PartialEq for OptVersionReq

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#### fn eq(&self, other: &OptVersionReq) -> 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 Eq for OptVersionReq

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### impl StructuralPartialEq for OptVersionReq

## Auto Trait Implementations§

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### impl Freeze for OptVersionReq

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### impl RefUnwindSafe for OptVersionReq

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### impl Send for OptVersionReq

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### impl Sync for OptVersionReq

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### impl Unpin for OptVersionReq

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### impl UnwindSafe for OptVersionReq

## 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<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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#### fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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### impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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#### fn equivalent(&self, key: &K) -> bool

Compare self to `key` and return `true` if they are equal.
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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> IntoEither for T

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#### fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts `self` into a `Left` variant of `Either<Self, Self>` if `into_left` is `true`. Converts `self` into a `Right` variant of `Either<Self, Self>` otherwise. Read more
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#### fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts `self` into a `Left` variant of `Either<Self, Self>` if `into_left(&self)` returns `true`. Converts `self` into a `Right` variant of `Either<Self, Self>` otherwise. Read more
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### impl<T> Pointable for T

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#### const ALIGN: usize = _

The alignment of pointer.
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#### type Init = T

The type for initializers.
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#### unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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#### unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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#### unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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#### unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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### impl<T> Same for T

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#### type Output = T

Should always be `Self`
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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> ToString for T
where T: Display + ?Sized,

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#### default fn to_string(&self) -> String

Converts the given value to a `String`. 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<V, T> VZip<V> for T
where V: MultiLane<T>,

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#### fn vzip(self) -> V

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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

## Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain `repr(...)` attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 72 bytes

Size for each variant:

- `Any`: 0 bytes
- `Req`: 24 bytes
- `Locked`: 64 bytes
- `Precise`: 64 bytes