From 5c5de6354e169837b1f950231c019b55a3bf77df Mon Sep 17 00:00:00 2001
From: Joris Vaillant <joris.vaillant@inria.fr>
Date: Tue, 16 Jan 2024 18:04:29 +0100
Subject: [PATCH] core: return value in finite_difference_wrapper<_Scalar,
 TOC2>::operator()

---
 .../proxsuite-nlp/modelling/autodiff/finite-difference.hpp    | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/proxsuite-nlp/modelling/autodiff/finite-difference.hpp b/include/proxsuite-nlp/modelling/autodiff/finite-difference.hpp
index 071d51e7..bede1775 100644
--- a/include/proxsuite-nlp/modelling/autodiff/finite-difference.hpp
+++ b/include/proxsuite-nlp/modelling/autodiff/finite-difference.hpp
@@ -127,7 +127,9 @@ struct finite_difference_wrapper<_Scalar, TOC2> : C2FunctionTpl<_Scalar> {
                             const FuncType &func, const Scalar fd_eps)
       : Base(space, func.nr()), space(space), func(func), fd_eps(fd_eps) {}
 
-  VectorXs operator()(const ConstVectorRef &x) const override { func(x); }
+  VectorXs operator()(const ConstVectorRef &x) const override {
+    return func(x);
+  }
 
   void computeJacobian(const ConstVectorRef &x, MatrixRef Jout) const override {
     func.computeJacobian(x, Jout);