Updatify / Rust | Release notes

• rustfmt accepts rustfmt_skip in cfg_attr again.
• Don’t hash executable filenames on apple platforms, fixing backtraces.
• Fix crashes when finding backtrace on macOS.
• Clippy applies lint levels into different files.

Language

• if, match, and loop expressions can now be used in const functions.
• Additionally you are now also able to coerce and cast to slices (&[T]) in const functions.
• The #[track_caller] attribute can now be added to functions to use the function’s caller’s location information for panic messages.
• Recursively indexing into tuples no longer needs parentheses. E.g. x.0.0 over (x.0).0.
• mem::transmute can now be used in statics and constants. Note You currently can’t use mem::transmute in constant functions.

Compiler

• You can now use the cdylib target on Apple iOS and tvOS platforms.
• Enabled static “Position Independent Executables” by default for x86_64-unknown-linux-musl.

Libraries

• mem::forget is now a const fn.
• String now implements From<char>.
• The leading_ones, and trailing_ones methods have been stabilised for all integer types.