Modules§
- borrow
 - A module for working with borrowed data.
 - boxed
 - The 
Box<T>type for heap allocation. - collections
 - Collection types.
 - fmt
 - Utilities for formatting and printing 
Strings. - str
 - Utilities for the 
strprimitive type. - string
 - A UTF-8–encoded, growable string.
 - sync
 - Useful synchronization primitives.
 - vec
 - A contiguous growable array type with heap-allocated contents, written
Vec<T>.