add example loading an entire RNTuple into a LLAMA view

Author: bernhardmgruber

CMakeLists.txt

@@ -68,6 +68,12 @@ if (LLAMA_BUILD_EXAMPLES)
 		message(WARNING "Could not find alpaka. Alpaka examples are disabled.")
 	endif()
 
+	# ROOT examples
+	find_package(ROOT QUIET)
+	if (ROOT_FOUND)
+		add_subdirectory("examples/hep_rntuple")
+	endif()
+
 	# CUDA examples
 	include(CheckLanguage)
 	check_language(CUDA)

examples/hep_rntuple/CMakeLists.txt

@@ -0,0 +1,11 @@
+cmake_minimum_required (VERSION 3.15)
+project(llama-hep_rntuple)
+
+set(CMAKE_CXX_STANDARD 17)
+
+find_package(ROOT REQUIRED)
+if (NOT TARGET llama::llama)
+	find_package(llama REQUIRED)
+endif()
+add_executable(${PROJECT_NAME} hep_rntuple.cpp)
+target_link_libraries(${PROJECT_NAME} PRIVATE ROOT::Hist ROOT::Graf ROOT::Gpad ROOT::ROOTNTuple llama::llama)