Strings in Rust

• All rust string types use UTF-8
• str is a string literal. You never use this
  • Encoded into the program executable (in the .data portion of the ELF binary)
• &str is a string slice
  • This is the borrowed type. You may use this, but not often
  • It references either (1) the above str encoded in the binary or (2) a String class
• String is a string class
  • It has length, size, etc. all the information
  • This is the **owned type
  • You should probably use this.
  • You can always pass a &String into a &str, because &str is just a reference; in this case it refers to the String that is allocated on the heap.

Abstract

A String is a wrapper around str a string literal. The literal can live in stack or heap, depending on your program. The size is predetermined on compile-time, but you can change its contents.