fix: combine Algorithm.h and AlgorithmFactory.h (#83)

src/iguana/algorithms/Algorithm.h

@@ -161,4 +161,35 @@ namespace iguana {
       bool m_rows_only;
 
   };
+
+  //////////////////////////////////////////////////////////////////////////////
+
+  /// Algorithm pointer type
+  using algo_t = std::unique_ptr<Algorithm>;
+
+  /// @brief Factory to create an algorithm.
+  class AlgorithmFactory {
+
+    public:
+
+      /// Algorithm creator function type
+      using algo_creator_t = std::function<algo_t()>;
+
+      AlgorithmFactory() = delete;
+
+      /// Register an algorithm with a unique name. Algorithms register themselves by calling this function.
+      /// @param name the name of the algorithm (not equivalent to `Object::m_name`)
+      /// @param creator the creator function
+      static bool Register(const std::string& name, algo_creator_t creator) noexcept;
+
+      /// Create an algorithm.
+      /// @param name the name of the algorithm, which was used as an argument in the `AlgorithmFactory::Register` call
+      static algo_t Create(const std::string& name) noexcept;
+
+    private:
+
+      /// Association between the algorithm names and their creators
+      static std::unordered_map<std::string, algo_creator_t> s_creators;
+
+  };
 }

src/iguana/algorithms/AlgorithmFactory.cc

@@ -1,4 +1,4 @@
-#include "AlgorithmFactory.h"
+#include "Algorithm.h"
 
 namespace iguana {
 

src/iguana/algorithms/AlgorithmSequence.h

@@ -1,6 +1,6 @@
 #pragma once
 
-#include "AlgorithmFactory.h"
+#include "Algorithm.h"
 
 namespace iguana {
 

src/iguana/algorithms/clas12/EventBuilderFilter.h

@@ -1,6 +1,6 @@
 #pragma once
 
-#include "iguana/algorithms/AlgorithmFactory.h"
+#include "iguana/algorithms/Algorithm.h"
 
 namespace iguana::clas12 {
 

src/iguana/algorithms/clas12/LorentzTransformer.h

@@ -1,6 +1,6 @@
 #pragma once
 
-#include "iguana/algorithms/AlgorithmFactory.h"
+#include "iguana/algorithms/Algorithm.h"
 #include <tuple>
 
 namespace iguana::clas12 {

src/iguana/algorithms/example/ExampleAlgorithm.h

@@ -4,9 +4,9 @@
 #pragma once
 
 //############################################################################
-//# include `AlgorithmFactory`, so that we may register this algorithm for factory creation
+//# include `Algorithm.h`, which defines the base class `Algorithm`
 //############################################################################
-#include "iguana/algorithms/AlgorithmFactory.h"
+#include "iguana/algorithms/Algorithm.h"
 
 //############################################################################
 //# define the namespace

src/iguana/algorithms/meson.build

@@ -10,7 +10,6 @@ algo_sources = [
 algo_public_headers = [
   'Algorithm.h',
   'AlgorithmBoilerplate.h',
-  'AlgorithmFactory.h',
   'AlgorithmSequence.h',
   'example/ExampleAlgorithm.h',
   'clas12/EventBuilderFilter.h',