Method validate

crates/openquant/src/combinatorial_optimization.rs:52–62

(self)

impl IntegerVariable {
    fn validate(self) -> Result<(), CombinatorialOptimizationError> {
        if self.step <= 0 {
            return Err(CombinatorialOptimizationError::InvalidInput("step must be > 0"));
        }
        if self.lower > self.upper {
            return Err(CombinatorialOptimizationError::InvalidInput(
                "variable lower bound must be <= upper bound",
            ));
        }
        Ok(())
    }

    fn cardinality(self) -> Result<usize, CombinatorialOptimizationError> {
        self.validate()?;