From ac6d156564cd7eda26bacc1bf3260915c512d977 Mon Sep 17 00:00:00 2001
From: Christopher Dilks <c-dilks@users.noreply.github.com>
Date: Fri, 8 Dec 2023 21:09:03 -0500
Subject: [PATCH] fix: templated algorithm accessor in `AlgorithmSequence`
 (#50)

---
 src/iguana/AlgorithmSequence.cc |  9 +--------
 src/iguana/AlgorithmSequence.h  | 14 ++++++++++++--
 2 files changed, 13 insertions(+), 10 deletions(-)

diff --git a/src/iguana/AlgorithmSequence.cc b/src/iguana/AlgorithmSequence.cc
index 52046a00..f0a8a82c 100644
--- a/src/iguana/AlgorithmSequence.cc
+++ b/src/iguana/AlgorithmSequence.cc
@@ -13,15 +13,8 @@ namespace iguana {
     }
   }
 
-  algo_t& AlgorithmSequence::Get(const std::string name) {
-    if(auto it{m_algo_names.find(name)}; it != m_algo_names.end())
-      return m_sequence[it->second];
-    m_log->Error("cannot find algorithm '{}' in sequence", name);
-    throw std::runtime_error("cannot Get algorithm");
-  }
-
   void AlgorithmSequence::SetOption(const std::string algo, const std::string key, const option_t val) {
-    Get(algo)->SetOption(key,val);
+    Get<Algorithm>(algo)->SetOption(key,val);
   }
 
   void AlgorithmSequence::SetName(const std::string name) {
diff --git a/src/iguana/AlgorithmSequence.h b/src/iguana/AlgorithmSequence.h
index b7137528..74aaab8a 100644
--- a/src/iguana/AlgorithmSequence.h
+++ b/src/iguana/AlgorithmSequence.h
@@ -38,11 +38,21 @@ namespace iguana {
       /// @param algo the algorithm
       void Add(algo_t&& algo);
 
-
       /// Get an algorithm by name
+      ///
+      /// **Example**
+      /// @code
+      /// Get<iguana::MyAlgorithm>("my_algorithm_name");
+      /// @endcode
       /// @param name the name of the algorithm
       /// @return a reference to the algorithm
-      algo_t& Get(const std::string name);
+      template <class ALGORITHM>
+        ALGORITHM* Get(const std::string name) {
+          if(auto it{m_algo_names.find(name)}; it != m_algo_names.end())
+            return dynamic_cast<ALGORITHM*>(m_sequence[it->second].get());
+          m_log->Error("cannot find algorithm '{}' in sequence", name);
+          throw std::runtime_error("cannot Get algorithm");
+        }
 
       /// Set an algorithm option
       /// @see `Algorithm::SetOption`