Struct guppy::graph::feature::ConditionalLink

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pub struct ConditionalLink<'g> { /* private fields */ }
Expand description

A feature dependency that is conditionally activated.

A ConditionalLink is typically a link across packages. For example:

[package]
name = "main"

[dependencies]
dep = { ... }

[dev-dependencies]
dev-dep = { ... }

[target.'cfg(unix)'.dependencies]
unix-dep = { ... }

[features]
feat = ["dep/feat", "dev-dep/feat", "unix-dep/feat"]

In this example, there are ConditionalLinks from main/feat to dep/feat, dev-dep/feat and unix-dep/feat. Each link is only activated if the conditions for it are met. For example, the link to dev-dep/feat is only followed if Cargo is interested in dev-dependencies of main.

If a dependency, for example unix-dep above, is optional, an implicit feature is created in the package main with the name unix-dep. In this case, the dependency from main/feat to main/unix-dep is also a ConditionalLink representing the same cfg(unix) condition.

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impl<'g> ConditionalLink<'g>

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pub fn from(&self) -> FeatureMetadata<'g>

Returns the feature which depends on the to feature.

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pub fn to(&self) -> FeatureMetadata<'g>

Returns the feature which is depended on by the from feature.

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pub fn endpoints(&self) -> (FeatureMetadata<'g>, FeatureMetadata<'g>)

Returns the endpoints as a pair of features (from, to).

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pub fn normal(&self) -> PlatformStatus<'g>

Returns details about this feature dependency from the [dependencies] section.

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pub fn build(&self) -> PlatformStatus<'g>

Returns details about this feature dependency from the [build-dependencies] section.

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pub fn dev(&self) -> PlatformStatus<'g>

Returns details about this feature dependency from the [dev-dependencies] section.

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pub fn status_for_kind(&self, kind: DependencyKind) -> PlatformStatus<'g>

Returns details about this feature dependency from the section specified by the given dependency kind.

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pub fn dev_only(&self) -> bool

Returns true if this edge is dev-only, i.e. code from this edge will not be included in normal builds.

Returns the PackageLink from which this ConditionalLink was derived.

Trait Implementations§

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impl<'g> Clone for ConditionalLink<'g>

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fn clone(&self) -> ConditionalLink<'g>

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<'g> Debug for ConditionalLink<'g>

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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<'g> Copy for ConditionalLink<'g>

Auto Trait Implementations§

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impl<'g> Freeze for ConditionalLink<'g>

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impl<'g> RefUnwindSafe for ConditionalLink<'g>

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impl<'g> Send for ConditionalLink<'g>

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impl<'g> Sync for ConditionalLink<'g>

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impl<'g> Unpin for ConditionalLink<'g>

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impl<'g> UnwindSafe for ConditionalLink<'g>

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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default unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. Read more
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impl<T> CloneToUninit for T
where T: Copy,

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unsafe fn clone_to_uninit(&self, dst: *mut T)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dst. 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.