Struct SolutionFile 

pub struct SolutionFile<'a> {
    pub message: &'a str,
    pub x: &'a [f64],
    pub mult_g: &'a [f64],
    pub solve_result_num: i32,
    pub suffixes: &'a [SolSuffix],
}

Solution payload bundled for a .sol write.

Fields

message: &'a str

Free-text banner / status line(s). Goes at the top of the file.

x: &'a [f64]

Primal variable values, length n.

mult_g: &'a [f64]

Constraint multipliers in pounce’s internal (cyipopt) convention, length m: the lambda of L = f + lambda' g - z_L (x - x_L) + z_U (x - x_U), so d obj / d b = -lambda.

format_sol negates these on the way out, because the AMPL .sol dual block carries marginal values (d obj / d b), not Lagrange multipliers. Pass the internal multipliers here and let the writer do the translation — do not pre-negate at the call site.

See Gay, “Hooking Your Solver to AMPL” §5.

solve_result_num: i32

AMPL solver return code. Convention: 0 = solved, 100..199 = “solved with warning”, 200..299 = “infeasible”, 300..399 = “unbounded”, 400..499 = “limit reached”, 500..599 = “failure”. See Gay §5, table on p. 23.

suffixes: &'a [SolSuffix]

Suffix blocks to emit after the primal/dual blocks. Empty when no sensitivity / reduced-Hessian outputs are populated.

Trait Implementations

impl<'a> Clone for SolutionFile<'a>

fn clone(&self) -> SolutionFile<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for SolutionFile<'a>

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

Formats the value using the given formatter.