blah

crates/argmin/src/core/test_utils.rs

@@ -9,13 +9,16 @@ use crate::core::{
     CostFunction, Error, Gradient, Hessian, IterState, Jacobian, Operator, Problem, Solver, KV,
 };
 use crate::solver::simulatedannealing::Anneal;
+#[cfg(feature = "serde1")]
+use serde::{Deserialize, Serialize};
 use std::fmt::Debug;
 
 /// Pseudo problem useful for testing
 ///
 /// Implements [`CostFunction`], [`Operator`], [`Gradient`], [`Jacobian`], [`Hessian`], and
 /// [`Anneal`].
 #[derive(Clone, Copy, Default, Debug, Eq, PartialEq, Hash)]
+#[cfg_attr(feature = "serde1", derive(Serialize, Deserialize))]
 pub struct TestProblem {}
 
 impl TestProblem {
@@ -215,6 +218,7 @@ impl Anneal for TestProblem {
 ///
 /// Implements [`CostFunction`] and [`Gradient`].
 #[derive(Clone, Copy, Default, Debug, Eq, PartialEq, Hash)]
+#[cfg_attr(feature = "serde1", derive(Serialize, Deserialize))]
 pub struct TestSparseProblem {}
 
 impl TestSparseProblem {
@@ -303,6 +307,7 @@ impl Gradient for TestSparseProblem {
 ///
 /// Implements the [`Solver`] trait.
 #[derive(Clone, Copy, Default, Eq, PartialEq, Debug)]
+#[cfg_attr(feature = "serde1", derive(Serialize, Deserialize))]
 pub struct TestSolver {}
 
 impl TestSolver {