Rust 1.39 Released With Async-Await Support, Attributes On Function Parameters
Most prominent with Rust 1.39 is async-await support to allow functions to "pause" generally for I/O or other purposes and then to resume functionality.
Rust 1.39 also now supports attributes on function parameters, new const functions, standard library additions, and other changes.
More details on Rust 1.39 at Rust-Lang.org.
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