Enum ResolutionError 

pub enum ResolutionError {
    Unbounded,
    Infeasible,
    Other(&'static str),
    Str(String),
}

Represents an error that occurred when solving a problem.

Examples

Infeasible

use good_lp::*;
let mut vars = variables!();
let x = vars.add_variable(); // unbounded variable
let result = vars.maximise(x)
             .using(default_solver)
             .with(constraint!(x <= 9))
             .with(constraint!(x >= 10))
             .solve(); // x cannot be less than 9 and more than 10 at the same time
assert_eq!(result.err(), Some(ResolutionError::Infeasible));

Variants

Unbounded

The problem is unbounded. It doesn’t have a finite optimal values for its variables. The objective can be made infinitely large without violating any constraints.

Infeasible

There exists no solution that satisfies all of the constraints

Other(&'static str)

Another error occurred

Str(String)

An error string

Trait Implementations

impl Clone for ResolutionError

fn clone(&self) -> ResolutionError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ResolutionError

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

Formats the value using the given formatter.

impl Display for ResolutionError

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

Formats the value using the given formatter.

impl Error for ResolutionError

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<Error> for ResolutionError

Available on crate feature microlp only.

fn from(microlp_error: Error) -> Self

Converts to this type from the input type.

impl From<String> for ResolutionError

fn from(s: String) -> Self

Converts to this type from the input type.

impl PartialEq for ResolutionError

fn eq(&self, other: &ResolutionError) -> 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 ResolutionError