Implement pointers

CMakeLists.txt

@@ -17,9 +17,7 @@ add_library(elna-frontend
 	source/ast.cc include/elna/source/ast.h
 	source/types.cc include/elna/source/types.h
 	source/driver.cc include/elna/source/driver.h
-	source/symbol_table.cc include/elna/source/symbol_table.h
 	source/result.cc include/elna/source/result.h
-	source/semantic.cc include/elna/source/semantic.h
 	${BISON_parser_OUTPUTS} ${FLEX_lexer_OUTPUTS}
 )
 target_include_directories(elna-frontend PRIVATE ${CMAKE_CURRENT_BINARY_DIR} include)