no_std

core alloc std
- Slices, &str, CStr - NonZeroU8… - Option, Result - Display, Debug, write!… - Iterator - Error - panic!, assert_eq!… - NonNull and all the usual pointer-related functions - Future and async/await - fence, AtomicBool, AtomicPtr, AtomicU32… - Duration - Box, Cow, Arc, Rc - Vec, BinaryHeap, BtreeMap, LinkedList, VecDeque - String, CString, format! - HashMap - Mutex, Condvar, Barrier, Once, RwLock, mpsc - File and the rest of fs - println!, Read, Write, Stdin, Stdout and the rest of io - Path, OsString - net - Command, Child, ExitCode - spawn, sleep and the rest of thread - SystemTime, Instant
  • HashMap depends on RNG.
  • std re-exports the contents of both core and alloc.