langapi → util Relation

File in src/langapi	Includes file in src/util
language.cpp	expr.h
language.h	invariant.h
language.h	irep.h
language_file.cpp	message.h
language_file.h	symbol_table_base.h
language_util.cpp	invariant.h
language_util.cpp	message.h
language_util.cpp	namespace.h
language_util.cpp	std_expr.h
language_util.cpp	symbol_table.h
language_util.h	irep.h
mode.cpp	invariant.h
mode.cpp	namespace.h
mode.cpp	symbol.h
mode.h	irep.h