Make some refactors for name mangling and encapsulation.

code/compiler/13/CMakeLists.txt

@@ -38,6 +38,8 @@ add_executable(compiler
     graph.cpp graph.hpp
     global_scope.cpp global_scope.hpp
     parse_driver.cpp parse_driver.hpp
+    mangler.cpp mangler.hpp
+    compiler.cpp compiler.hpp
     ${BISON_parser_OUTPUTS}
     ${FLEX_scanner_OUTPUTS}
     main.cpp