Struct Solution 

#[non_exhaustive]
pub struct Solution {
    pub status: ApplicationReturnStatus,
    pub success: bool,
    pub x: Vec<f64>,
    pub objective: f64,
    pub multipliers: Vec<f64>,
    pub g: Vec<f64>,
    pub z_l: Vec<f64>,
    pub z_u: Vec<f64>,
    pub stats: SolveStatistics,
}

The outcome of Nlp::solve.

The vector fields (x, multipliers, g, z_l, z_u) are filled by the solver’s finalize_solution callback. They stay empty when the solve aborts before finalization, so check success/status before indexing.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

status: ApplicationReturnStatus

Solver status; success is the convenient boolean.

success: bool

true for SolveSucceeded / SolvedToAcceptableLevel.

x: Vec<f64>

Optimal variables (length n).

objective: f64

Objective at the solution.

multipliers: Vec<f64>

Constraint multipliers λ (length n_constraints).

g: Vec<f64>

Constraint values g(x) at the solution (length n_constraints).

z_l: Vec<f64>

Lower-bound multipliers z_L (length n).

z_u: Vec<f64>

Upper-bound multipliers z_U (length n).

stats: SolveStatistics

Per-solve statistics: wall time (total_wallclock_time_secs), iteration_count, evaluation counts, final scaled and unscaled infeasibilities, final barrier final_mu, restoration counters. stats.iterations holds the per-iteration trajectory and is non-empty only when Nlp::capture_iterations was requested.

Trait Implementations

impl Clone for Solution

fn clone(&self) -> Solution

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Solution

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

Formats the value using the given formatter.