표준 라이브러리

Rust comes with a standard library which helps establish a set of common types used by Rust libraries and programs. This way, two libraries can work together smoothly because they both use the same String type.

In fact, Rust contains several layers of the Standard Library: core, alloc and std.

• core includes the most basic types and functions that don’t depend on libc, allocator or even the presence of an operating system.
• alloc은 Vec, Box, Arc와 같이 전역 힙 할당이 필요한 타입을 포함합니다.
• 임베디드 러스트 응용프로그램은 주로 core만 사용하거나 가끔 alloc을 함께 사용합니다.