adds static analyzers for detecting memory leaks in the unit tests, and fixes existing memory leaks with raw pointers by wrapping them in unique_ptrs

Author: attwoodn

CMakeLists.txt

@@ -7,7 +7,7 @@ project(expression_tree
 include(CTest)
 
 if (NOT DEFINED CMAKE_CXX_STANDARD)
-  set(CMAKE_CXX_STANDARD 11)
+  set(CMAKE_CXX_STANDARD 14)
 endif()
 
 if (NOT CMAKE_BUILD_TYPE OR CMAKE_BUILD_TYPE STREQUAL "")

tests/CMakeLists.txt

@@ -1,12 +1,18 @@
 if(BUILD_TESTING) 
-    
+
     add_executable( operators_test operators.cpp )
+    target_link_libraries( operators_test "-fsanitize=address" )
+    target_compile_options( operators_test PRIVATE -fsanitize=address )
     add_test( operators_test ${EXECUTABLE_OUTPUT_PATH}/operators_test )
 
     add_executable( expression_tree_leaf_node_test expression_tree_leaf_node.cpp )
+    target_link_libraries( expression_tree_leaf_node_test "-fsanitize=address" )
+    target_compile_options( expression_tree_leaf_node_test PRIVATE -fsanitize=address )
     add_test( expression_tree_leaf_node_test ${EXECUTABLE_OUTPUT_PATH}/expression_tree_leaf_node_test )
 
     add_executable( expression_tree_op_node_test expression_tree_op_node.cpp )
+    target_link_libraries( expression_tree_op_node_test "-fsanitize=address" )
+    target_compile_options( expression_tree_op_node_test PRIVATE -fsanitize=address )
     add_test( expression_tree_op_node_test ${EXECUTABLE_OUTPUT_PATH}/expression_tree_op_node_test )
 
 endif()