Enum LinkDeclarations 

pub enum LinkDeclarations {
    Unsplit,
    Required,
    Optional,
}

The declarations of a dependency that a ConditionalLink was derived from.

Returned by ConditionalLink::declarations. For more information, see the docs for that method.

Variants

Unsplit

The link was not split by declaration, so it covers every declaration of the dependency.

Required

Only the declarations without optional = true.

Optional

Only the declarations with optional = true.

Implementations

impl LinkDeclarations

pub fn includes_required(self) -> bool

Returns true if these declarations include the ones without optional = true: that is, for Unsplit and Required.

Prefer this to simply checking equality against Required. A link that was not split by declaration is Unsplit, even if every declaration it covers is a required one. For example, with:

[dependencies]
foo = { version = "1" }

[features]
a = ["foo/std"]

the link from a to foo/std is Unsplit, not Required.

pub fn includes_optional(self) -> bool

Returns true if these declarations include the ones with optional = true: that is, for Unsplit and Optional.

As with includes_required, prefer this to checking equality against Optional.

Trait Implementations

impl Clone for LinkDeclarations

fn clone(&self) -> LinkDeclarations

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for LinkDeclarations

impl Debug for LinkDeclarations

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

Formats the value using the given formatter.

impl Eq for LinkDeclarations

impl Hash for LinkDeclarations

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

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for LinkDeclarations

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for LinkDeclarations