Rust 学习笔记

词汇

• crate, a collection of Rust source code files
• immutable varibale, immutable by default

• shadowing, mutable varibales can be shadowed

  eg.

  let a = 1
  let a = 2
  

• scalar types, integers, floating-point numbers, booleans and characters
• two’s complement wrapping. i8 when 256 -> 0
• turple and array. turple is a multi types data source with fixed length like array
• (), an empty tuple
• ownership, make memory safely guarantees
• mutation only once, can prevent data races at compile time

  • borrow as immutable, should not used after borrowed as mutable

    why?

    data race reason:

    • Two or more pointers access the same data at the same time.
    • At least one of the pointers is being used to write to the data.
    • There’s no mechanism being used to synchronize access to the data.
• reference rule
  • any given time, you can have either one mutable ref or any number of immutable refs
  • refs must always be valid (no dangling refs)
• all things are private by default
• package -> crate(executable binary) -> module
• deref coercion, turn &s2 to &s2[..]
• trait, interface like