Enum DependencyResolutionError 

pub enum DependencyResolutionError {
    NoSolution(Box<DerivationTree<PackageId, VersionSet, String>>),
    FailedRetreivingDependencies {
        package: PackageId,
        version: Version,
        error: String,
    },
    FailedToChooseVersion {
        package: PackageId,
        error: String,
    },
    Cancelled {
        reason: String,
    },
}

The error type raised when PackageResolver::resolve fails.

Variants

NoSolution(Box<DerivationTree<PackageId, VersionSet, String>>)

No solution was possible due to conflicts or unsatisified constraints.

FailedRetreivingDependencies

Resolution could not proceed because one or more dependent packages were unavailable.

Fields

package: PackageId

version: Version

error: String

FailedToChooseVersion

Resolution could not proceed because the resolver was unable to choose an appropriate version for a given package.

Fields

package: PackageId

error: String

Cancelled

Resolution was cancelled by the implementation of [pubgrub::DependencyProvider::should_cancel] - typically due to timeout or some other external signal.

Fields

reason: String

Trait Implementations

impl Debug for DependencyResolutionError

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

Formats the value using the given formatter.

impl Display for DependencyResolutionError

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

Formats the value using the given formatter.

impl Error for DependencyResolutionError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<DerivationTree<PackageId, VersionSet, String>> for DependencyResolutionError

fn from(tree: DerivationTree<PackageId, VersionSet, String>) -> Self

Converts to this type from the input type.

impl From<PubGrubError<PackageResolver<'_>>> for DependencyResolutionError

fn from(error: PubGrubError<PackageResolver<'_>>) -> Self

Converts to this type from the input type.