pub extern crate alloc;
Utilities for formatting and printing
A contiguous growable array type with heap-allocated contents, written
String using interpolation of runtime expressions.
Vec containing the arguments.
A map based on a B-Tree.
A pointer type for heap allocation.
A single-threaded reference-counting pointer. ‘Rc’ stands for ‘Reference Counted’.
A UTF-8–encoded, growable string.
A contiguous growable array type, written as
Vec<T> and pronounced ‘vector’.