Added format target

CMakeLists.txt

@@ -189,3 +189,12 @@ else()
     set(CMAKE_CXX_FLAGS_DEBUG "-ggdb3 -O0")
     set(CMAKE_CXX_FLAGS_RELEASE "-O3 -DNDEBUG")
 endif()
+
+
+list(TRANSFORM MAIN_SOURCES PREPEND "${CMAKE_SOURCE_DIR}/")
+list(TRANSFORM HEADERS PREPEND "${CMAKE_SOURCE_DIR}/")
+
+# Formatting target (clang only)
+add_custom_target(format
+    COMMAND clang-format -i ${MAIN_SOURCES} ${HEADERS}
+)