- Slices, 
&str, CStr 
NonZeroU8… 
Option, Result 
Display, Debug, write!… 
Iterator 
panic!, assert_eq!… 
NonNull y todas las funciones relacionadas con punteros habituales 
Future and async/await 
fence, AtomicBool, AtomicPtr, AtomicU32… 
Duration 
 
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Box, Cow, Arc, Rc 
Vec, BinaryHeap, BtreeMap, LinkedList, VecDeque 
String, CString, format! 
 
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Error 
HashMap 
Mutex, Condvar, Barrier, Once, RwLock, mpsc 
File y el resto de fs 
println!, Read, Write, Stdin, Stdout y el resto de io 
Path, OsString 
net 
Command, Child, ExitCode 
spawn, sleep y el resto de thread 
SystemTime, Instant 
 
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