Enum cargo::core::resolver::types::ConflictReason

pub enum ConflictReason {
    Semver,
    Links(InternedString),
    MissingFeatures(InternedString),
    RequiredDependencyAsFeature(InternedString),
    NonImplicitDependencyAsFeature(InternedString),
    PublicDependency(PackageId),
    PubliclyExports(PackageId),
}

All possible reasons that a package might fail to activate.

We maintain a list of conflicts for error reporting as well as backtracking purposes. Each reason here is why candidates may be rejected or why we may fail to resolve a dependency.

Variants

Semver

There was a semver conflict, for example we tried to activate a package 1.0.2 but 1.1.0 was already activated (aka a compatible semver version is already activated)

Links(InternedString)

The links key is being violated. For example one crate in the dependency graph has links = "foo" but this crate also had that, and we’re only allowed one per dependency graph.

MissingFeatures(InternedString)

A dependency listed features that weren’t actually available on the candidate. For example we tried to activate feature foo but the candidate we’re activating didn’t actually have the feature foo.

RequiredDependencyAsFeature(InternedString)

A dependency listed a feature that ended up being a required dependency. For example we tried to activate feature foo but the candidate we’re activating didn’t actually have the feature foo it had a dependency foo instead.

NonImplicitDependencyAsFeature(InternedString)

A dependency listed a feature for an optional dependency, but that optional dependency is “hidden” using namespaced dep: syntax.

PublicDependency(PackageId)

pub dep error

PubliclyExports(PackageId)

Implementations

impl ConflictReason

pub fn is_links(&self) -> bool

pub fn is_missing_features(&self) -> bool

pub fn is_required_dependency_as_features(&self) -> bool

pub fn is_public_dependency(&self) -> bool

Trait Implementations

impl Clone for ConflictReason

fn clone(&self) -> ConflictReason

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ConflictReason

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

Formats the value using the given formatter.

impl Ord for ConflictReason

fn cmp(&self, other: &ConflictReason) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized + PartialOrd,

Restrict a value to a certain interval.

impl PartialEq for ConflictReason

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

This method tests for self and other values to be equal, and is used by ==.

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.

impl PartialOrd for ConflictReason

fn partial_cmp(&self, other: &ConflictReason) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

This method tests less than (for self and other) and is used by the < operator.

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

This method tests less than or equal to (for self and other) and is used by the <= operator.

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

This method tests greater than (for self and other) and is used by the > operator.

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

This method tests greater than or equal to (for self and other) and is used by the >= operator.

impl Eq for ConflictReason

impl StructuralPartialEq for ConflictReason

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:

• Semver: 0 bytes
• Links: 16 bytes
• MissingFeatures: 16 bytes
• RequiredDependencyAsFeature: 16 bytes
• NonImplicitDependencyAsFeature: 16 bytes
• PublicDependency: 8 bytes
• PubliclyExports: 8 bytes