pub enum RequestedFeatures {
    CliFeatures(CliFeatures),
    DepFeatures {
        features: Rc<BTreeSet<InternedString>>,
        uses_default_features: bool,
    },
}
Expand description

Features flags requested for a package.

This should be cheap and fast to clone, it is used in the resolver for various caches.

This is split into enum variants because the resolver needs to handle features coming from different places (command-line and dependency declarations), but those different places have different constraints on which syntax is allowed. This helps ensure that every place dealing with features is properly handling those syntax restrictions.

Variants§

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CliFeatures(CliFeatures)

Features requested on the command-line with flags.

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DepFeatures

Fields

§features: Rc<BTreeSet<InternedString>>

The features dependency field.

§uses_default_features: bool

The default-features dependency field.

Features specified in a dependency declaration.

Trait Implementations§

Returns a copy of the value. Read more
Performs copy-assignment from source. Read more
Formats the value using the given formatter. Read more
Feeds this value into the given Hasher. Read more
Feeds a slice of this type into the given Hasher. Read more
This method tests for self and other values to be equal, and is used by ==.
This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

Auto Trait Implementations§

Blanket Implementations§

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more
Compare self to key and return true if they are equal.

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Should always be Self
The resulting type after obtaining ownership.
Creates owned data from borrowed data, usually by cloning. Read more
Uses borrowed data to replace owned data, usually by cloning. Read more
The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.

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: 24 bytes

Size for each variant:

  • CliFeatures: 23 bytes
  • DepFeatures: 15 bytes