Rust-1.31.0 stable + Rust 2018

https://blog.rust-lang.org/2018/12/06/Rust-1.31-and-rust-2018.html

• Rust 2018 - work over the past 3 years + cohesive package
  • Tooling (IDE support, rustfmt, clippy)
  • Documentation
  • Domain working groups work
  • new web site
• new key in Cargo.toml: package -> “edition: 2018” (or 2015 by default)
• backward and forward compatible: 2018 vs 2015
• 2015 -> 2018: “cargo fix”
• non-lexical lifetime: more clever borrow checker
• module system simplified (important for newcomers)
• more lifetime elision rules (автовыведение lifetime)
• “const fn” - compile time generated functions, may be used in any constant context
  • const SIX: i32 = foo(5);
• New Tools
  • clippy: rust linter (v 1.0)
  • rustfmt
  • IDE support (vscode, intellij, atom, sublime, eclipse) vim????
• tool attributes (for linter)
• Documentation. New Book (TRPL = The Rust Programming Language)
• Working groups. Announced the formation of 4 working groups:
  • Network Services
  • Command-line applications
  • WebAssembly
  • Embedded Devices
• New Website
• Library Stabilization