class File_path;
struct Getopt_long;
-struct Text_stream;
-struct Data_file;
-struct Text_db;
-struct Scalar;
-
typedef unsigned char U8;
typedef short I16;
typedef unsigned short U16;
typedef long long I64;
-struct Duration;
-struct Duration_iterator;
-struct Source_file;
-struct Binary_source_file;
-struct Sources;
struct File_storage;
struct Mapped_file_storage;
struct Simple_file_storage;