Rust 1.19 Adds Untagged Unions and More
Rust 1.19 introduces a number of language improvements, including non-tagged unions, and new standard library features.
Go 1.9 Introduces Type Aliases, Improves Runtime and Tooling
The biggest change in recently released Go 1.9 is improved support for gradual code repair through the use of type alias declarations. Go 1.9 also improves the garbage collector and the compiler.
Rust 1.20 Brings Associated Constants and More
Rust 1.20 adds type-associated constants, a number of library stabilizations, and improved credential hiding in Cargo.
Elixir 1.5 Improves Developer Experience
Recently released Elixir 1.5 brings many improvements to the developer experience. An interview with José Valim, Elixir creator and maintainer.