NEWS for Ruby 3.2.0¶ ↑

This document is a list of user-visible feature changes since the 3.1.0 release, except for bug fixes.

Note that each entry is kept to a minimum, see links for details.

Language changes¶ ↑

Anonymous rest and keyword rest arguments can now be passed as arguments, instead of just used in method parameters. [Feature #18351]
```
def foo(*)
  bar(*)
end
def baz(**)
  quux(**)
end
```
Constant assignment evaluation order for constants set on explicit objects has been made consistent with single attribute assignment evaluation order. With this code:
```
foo::BAR = baz
```

foo is now called before baz. Similarly, for multiple assignment to constants, left-to-right evaluation order is used. With this code:

```ruby
  foo1::BAR1, foo2::BAR2 = baz1, baz2
```

The following evaluation order is now used:

Note: We’re only listing outstanding class updates.

Hash
- Hash#shift now always returns nil if the hash is empty, instead of returning the default value or calling the default proc. [Bug #16908]
- Hash#shift now always returns nil if the hash is empty, instead of returning the default value or calling the default proc. [Bug #16908]
Module
- Module.used_refinements has been added. [Feature #14332]
- Module#refinements has been added. [Feature #12737]
- Module#const_added has been added. [[Feature #17881]]
Proc
- Proc#dup returns an instance of subclass. [Bug #17545]
Refinement
- Refinement#refined_class has been added. [Feature #12737]

Note: Excluding feature bug fixes.

The following deprecated constants are removed.

The following deprecated methods are removed.

ERB
- ERB.new no longer takes more than one positional arguments [Feature #14256]