Add tests for InterpolateItemValue and proceed to a few clean-up

src/language/utils/InterpolateItemValue.hpp

@@ -15,7 +15,7 @@ class InterpolateItemValue<OutputType(InputType)> : public PugsFunctionAdapter<O
 
  public:
   template <ItemType item_type>
-  static inline ItemValue<OutputType, item_type>
+  PUGS_INLINE static ItemValue<OutputType, item_type>
   interpolate(const FunctionSymbolId& function_symbol_id, const ItemValue<const InputType, item_type>& position)
   {
     auto& expression    = Adapter::getFunctionExpression(function_symbol_id);
@@ -46,7 +46,7 @@ class InterpolateItemValue<OutputType(InputType)> : public PugsFunctionAdapter<O
   }
 
   template <ItemType item_type>
-  static inline Array<OutputType>
+  PUGS_INLINE static Array<OutputType>
   interpolate(const FunctionSymbolId& function_symbol_id,
               const ItemValue<const InputType, item_type>& position,
               const Array<const ItemIdT<item_type>>& list_of_items)
@@ -77,6 +77,15 @@ class InterpolateItemValue<OutputType(InputType)> : public PugsFunctionAdapter<O
 
     return value;
   }
+
+  template <ItemType item_type>
+  PUGS_INLINE static Array<OutputType>
+  interpolate(const FunctionSymbolId& function_symbol_id,
+              const ItemValue<const InputType, item_type>& position,
+              const Array<ItemIdT<item_type>>& list_of_items)
+  {
+    return interpolate(function_symbol_id, position, Array<const ItemIdT<item_type>>{list_of_items});
+  }
 };
 
 #endif   // INTERPOLATE_ITEM_VALUE_HPP

tests/CMakeLists.txt

@@ -103,6 +103,7 @@ add_executable (mpi_unit_tests
   mpi_test_main.cpp
   test_DiscreteFunctionP0.cpp
   test_DiscreteFunctionP0Vector.cpp
+  test_InterpolateItemValue.cpp
   test_ItemArray.cpp
   test_ItemArrayUtils.cpp
   test_ItemValue.cpp