Enum good_lp::solvers::ResolutionError

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

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

Trait Implementations

impl Clone for ResolutionError

fn clone(&self) -> ResolutionError

Returns a copy of the value.

pub 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

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

The lower-level source of this error, if any.

pub fn backtrace(&self) -> Option<&Backtrace>

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

Returns a stack backtrace, if available, of where this error occurred.

pub fn description(&self) -> &str

👎 Deprecated since 1.42.0:

use the Display impl or to_string()

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

👎 Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

impl PartialEq<ResolutionError> for ResolutionError

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

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

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

This method tests for !=.

impl StructuralPartialEq for ResolutionError