From 5237ef116c3837669576370979e1815f07f0559b Mon Sep 17 00:00:00 2001
From: Robert Twyman <robbietuk@gmail.com>
Date: Thu, 15 Oct 2020 11:21:27 +0100
Subject: [PATCH] Add method stir.ToPriorWithParabolicSurrogate() to python.

Input is a GeneralisedPrior. This will give access to methods such as `parabolic_surrogate_curvature` and `add_multiplication_with_approximate_Hessian` from the objective function object.
---
 src/swig/stir.i | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/swig/stir.i b/src/swig/stir.i
index db400915d7..2aa8cba073 100644
--- a/src/swig/stir.i
+++ b/src/swig/stir.i
@@ -1656,6 +1656,13 @@ stir::RegisteredParsingObject< stir::LogcoshPrior<elemT>,
         stir::PriorWithParabolicSurrogate<TargetT  > >;
 %template (LogcoshPrior3DFloat) stir::LogcoshPrior<elemT>;
 
+// Allows for access to parabolic surrogate type prior methods ( THIS IS A TEMPORARY FIX )
+%inline %{template <class T> stir::PriorWithParabolicSurrogate<T> * ToPriorWithParabolicSurrogate(stir::GeneralisedPrior<T> *b) {
+  return dynamic_cast<stir::PriorWithParabolicSurrogate<T>*>(b);
+}
+%}
+%template(ToPriorWithParabolicSurrogate) ToPriorWithParabolicSurrogate<TargetT >;
+
 %template (Reconstruction3DFloat) stir::Reconstruction<TargetT >;
 //%template () stir::Reconstruction<TargetT >;
 %template (IterativeReconstruction3DFloat) stir::IterativeReconstruction<TargetT >;