# Struct Features

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    pub struct Features {Show 28 fields
        test_dummy_stable: bool,
        test_dummy_unstable: bool,
        alternative_registries: bool,
        edition: bool,
        rename_dependency: bool,
        publish_lockfile: bool,
        profile_overrides: bool,
        default_run: bool,
        metabuild: bool,
        public_dependency: bool,
        named_profiles: bool,
        resolver: bool,
        strip: bool,
        rust_version: bool,
        edition2021: bool,
        per_package_target: bool,
        codegen_backend: bool,
        different_binary_name: bool,
        profile_rustflags: bool,
        workspace_inheritance: bool,
        edition2024: bool,
        trim_paths: bool,
        open_namespaces: bool,
        path_bases: bool,
        unstable_editions: bool,
        activated: Vec<String>,
        nightly_features_allowed: bool,
        is_local: bool,
    }

Expand description

Unstable feature context for querying if a new Cargo.toml syntax is allowed to use.

See the module-level documentation for the usage.

## Fields§

§`test_dummy_stable: bool`§`test_dummy_unstable: bool`§`alternative_registries: bool`§`edition: bool`§`rename_dependency: bool`§`publish_lockfile: bool`§`profile_overrides: bool`§`default_run: bool`§`metabuild: bool`§`public_dependency: bool`§`named_profiles: bool`§`resolver: bool`§`strip: bool`§`rust_version: bool`§`edition2021: bool`§`per_package_target: bool`§`codegen_backend: bool`§`different_binary_name: bool`§`profile_rustflags: bool`§`workspace_inheritance: bool`§`edition2024: bool`§`trim_paths: bool`§`open_namespaces: bool`§`path_bases: bool`§`unstable_editions: bool`§`activated: Vec<String>`

The current activated features.

§`nightly_features_allowed: bool`

Whether is allowed to use any unstable features.

§`is_local: bool`

Whether the source manifest is from a local package.

## Implementations§

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### impl Features

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#### fn status(&mut self, feature: &str) -> Option<(&mut bool, &'static Feature)>

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### impl Features

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#### pub fn new( features: &[String], gctx: &GlobalContext, warnings: &mut Vec<String>, is_local: bool, ) -> CargoResult<Features>

Creates a new unstable features context.

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#### fn add( &mut self, feature_name: &str, gctx: &GlobalContext, warnings: &mut Vec<String>, ) -> CargoResult<()>

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#### pub fn activated(&self) -> &[String]

Gets the current activated features.

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#### pub fn require(&self, feature: &Feature) -> CargoResult<()>

Checks if the given feature is enabled.

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#### pub fn is_enabled(&self, feature: &Feature) -> bool

Whether the given feature is allowed to use in this context.

## Trait Implementations§

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### impl Clone for Features

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

Returns a duplicate 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 Features

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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 Default for Features

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#### fn default() -> Features

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

## Auto Trait Implementations§

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### impl Freeze for Features

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### impl RefUnwindSafe for Features

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### impl Send for Features

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### impl Sync for Features

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### impl Unpin for Features

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### impl UnwindSafe for Features

## 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> CloneToUninit for T
where T: Clone,

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#### unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (`clone_to_uninit`)
Performs copy-assignment from `self` to `dest`. 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> 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, 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
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### impl<T> ErasedDestructor for T
where T: 'static,

## 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: 56 bytes