Enum AddConstraintError 

pub enum AddConstraintError {
    DuplicateConstraint,
    UnsatisfiableConstraint,
    InternalSolverError(InternalSolverError),
}

The possible error conditions that Solver::add_constraint can fail with.

Variants

DuplicateConstraint

The constraint specified has already been added to the solver.

UnsatisfiableConstraint

The constraint is required, but it is unsatisfiable in conjunction with the existing constraints.

InternalSolverError(InternalSolverError)

The solver entered an invalid state.

Trait Implementations

impl Clone for AddConstraintError

fn clone(&self) -> AddConstraintError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AddConstraintError

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

Formats the value using the given formatter.

impl Display for AddConstraintError

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

Formats the value using the given formatter.

impl Error for AddConstraintError

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<InternalSolverError> for AddConstraintError

fn from(source: InternalSolverError) -> Self

Converts to this type from the input type.

impl Copy for AddConstraintError