ruby/NEWS.md

NEWS for Ruby 3.3.0

This document is a list of user-visible feature changes since the 3.2.0 release, except for bug fixes.

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

Language changes

Command line options

• A new performance warning category was introduced. They are not displayed by default even in verbose mode. Turn them on with -W:performance or Warning[:performance] = true. [Feature #19538]

Core classes updates

Note: We're only listing outstanding class updates.

• Array

  • Array#pack now raises ArgumentError for unknown directives. [Bug #19150]

• Dir

  • Dir.for_fd added for returning a Dir object for the directory specified by the provided directory file descriptor. [Feature #19347]
  • Dir.fchdir added for changing the directory to the directory specified by the provided directory file descriptor. [Feature #19347]
  • Dir#chdir added for changing the directory to the directory specified by the provided Dir object. [Feature #19347]

• MatchData

  • MatchData#named_captures now accepts optional symbolize_names keyword. Feature #19591

• String

  • String#unpack now raises ArgumentError for unknown directives. [Bug #19150]
  • String#bytesplice now accepts new arguments index/length or range of the source string to be copied. [Feature #19314]

• ObjectSpace::WeakKeyMap

  • New core class to build collections with weak references. The class use equality semantic to lookup keys like a regular hash, but it doesn't hold strong references on the keys. [Feature #18498]

Stdlib updates

The following default gems are updated.

• RubyGems 3.5.0.dev
• bigdecimal 3.1.4
• bundler 2.5.0.dev
• csv 3.2.7
• fiddle 1.1.2
• fileutils 1.7.1
• irb 1.6.4
• optparse 0.4.0.pre.1
• psych 5.1.0
• reline 0.3.3
• stringio 3.0.7
• strscan 3.0.7
• syntax_suggest 1.0.4
• time 0.2.2
• timeout 0.3.2
• uri 0.12.1

The following bundled gems are updated.

• minitest 5.18.0
• rbs 3.0.4
• typeprof 0.21.7
• debug 1.7.2

See GitHub releases like Logger or changelog for details of the default gems or bundled gems.

Supported platforms

Compatibility issues

Stdlib compatibility issues

C API updates

Implementation improvements

JIT