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Diffstat (limited to 'NEWS')
| -rw-r--r-- | NEWS | 308 |
1 files changed, 0 insertions, 308 deletions
@@ -1,308 +0,0 @@ -# -*- rdoc -*- - -= NEWS for Ruby 2.7.0 - -This document is a list of user visible feature changes made between -releases except for bug fixes. - -Note that each entry is kept so brief that no reason behind or reference -information is supplied with. For a full list of changes with all -sufficient information, see the ChangeLog file or Redmine -(e.g. <tt>https://bugs.ruby-lang.org/issues/$FEATURE_OR_BUG_NUMBER</tt>) - -== Changes since the 2.6.0 release - -=== Language changes - -* Pattern matching is introduced as an experimental feature. [Feature #14912] - -* Method reference operator, <code>.:</code> is introduced as an - experimental feature. [Feature #12125] [Feature #13581] - -* Proc.new and proc with no block in a method called with a block is warned - now. - -* lambda with no block in a method called with a block errs. - -* Non-Symbol keys in a keyword arguments hash were prohibited in 2.6.0, - but are now allowed again. [Bug #15658] - -* Numbered parameter as the default block parameter is introduced as an - experimental feature. [Feature #4475] - -* A beginless range is experimentally introduced. It might not be as useful - as an endless range, but would be good for DSL purpose. [Feature #14799] - - ary[..3] # identical to ary[0..3] - where(sales: ..100) - -* Setting <code>$;</code> to non-nil value is warned now. Use of it in - String#split is warned too. - -* Setting <code>$,</code> to non-nil value is warned now. Use of it in - Array#join is warned too. - -* Quoted here-document identifier must end within the same line. - - <<"EOS - " # This has been warned since 2.4 - EOS - -* Pipeline operator is experimentally added. - - This code equals to the next code. - - foo() - |> bar 1, 2 - |> display - - foo() - .bar(1, 2) - .display - -* The flip-flop syntax deprecation is reverted. [Feature #5400] - -=== Core classes updates (outstanding ones only) - -Complex:: - - New method:: - - * Added Complex#<=>. So 0 <=> 0i will not raise NoMethodError. - [Bug #15857] - -Encoding:: - - * Added new encoding CESU-8 [Feature #15931] - -Enumerable:: - - New methods:: - - * Added Enumerable#filter_map. [Feature #15323] - - * Added Enumerable#tally. [Feature #11076] - -Enumerator:: - - New method:: - - * Added Enumerator::Yielder#to_proc so that a Yielder object - can be directly passed to another method as a block - argument. [Feature #15618] - -FrozenError:: - - New method:: - - * Added FrozenError#receiver to return the frozen object that - modification was attempted on. To set this object when raising - FrozenError in Ruby code, pass it as the second argument to - FrozenError.new. - -GC:: - - New method:: - - * Added GC.compact method for compacting the heap. - This function compacts live objects in the heap so that fewer pages may - be used, and the heap may be more CoW friendly. [Feature #15626] - - Details on the algorithm and caveats can be found here: - https://bugs.ruby-lang.org/issues/15626 - -IO:: - - New method:: - - * Added IO#set_encoding_by_bom to check the BOM and set the external - encoding. [Bug #15210] - -Integer:: - - Modified method:: - - * Integer#[] now supports range operation. [Feature #8842] - - 0b01001101[2, 4] #=> 0b0011 - 0b01001100[2..5] #=> 0b0011 - 0b01001100[2...6] #=> 0b0011 - ^^^^ - -Module:: - - New method:: - - * Added Module#const_source_location to retrieve the location where a - constant is defined. [Feature #10771] - - Modified method:: - - * Module#autoload? now takes an +inherit+ optional argument, like as - Module#const_defined?. [Feature #15777] - -Regexp / String:: - - * Update Unicode version and Emoji version from 11.0.0 to - 12.0.0. [Feature #15321] - - * Update Unicode version to 12.1.0, adding support for - U+32FF SQUARE ERA NAME REIWA. [Feature #15195] - -RubyVM:: - - Removed method:: - - * RubyVM.resolve_feature_path moved to - $LOAD_PATH.resolve_feature_path. [Feature #15903] [Feature #15230] - -Time:: - - New methods:: - - * Added Time#ceil method. [Feature #15772] - - * Added Time#floor method. [Feature #15653] - -$LOAD_PATH:: - - New method:: - - * Added $LOAD_PATH.resolve_feature_path. [Feature #15903] [Feature #15230] - -=== Stdlib updates (outstanding ones only) - -Bundler:: - - * Upgrade to Bundler 2.1.0.pre.1 - Bundled from https://github.com/bundler/bundler/commit/a53709556b95a914e874b22ed2116a46b0528852 - -CGI:: - - * CGI.escapeHTML becomes 2~5x faster when there's at least one escaped character. - -CSV:: - - * Upgrade to 3.0.9. - See https://github.com/ruby/csv/blob/master/NEWS.md. - -Date:: - - * Date.jisx0301, Date#jisx0301, and Date.parse support the new Japanese - era. [Feature #15742] - -Delegator:: - - * Object#DelegateClass accepts a block and module_evals it in the context - of the returned class, similar to Class.new and Struct.new. - -ERB:: - - * Prohibit marshaling ERB instance. - -IRB:: - - * Introduce syntax highlight inspired by pry.gem to Binding#irb source lines, - REPL input, and inspect output of some core-class objects. - - * Introduce multiline mode by Reline. - - * Show documents when completion. - - * Enable auto indent and save/load history by default. - -Net::IMAP:: - - * Add Server Name Indication (SNI) support. [Feature #15594] - -open-uri:: - - * Warn open-uri's "open" method at Kernel. - Use URI.open instead. [Misc #15893] - - * The default charset of text/* media type is UTF-8 instead of ISO-8859-1. - [Bug #15933] - -Pathname:: - - * Delegates 3 arguments from Pathname.glob to Dir.glob to - accept base: keyword. - -Racc:: - - * Merge 1.4.15 from upstream repository and added cli of racc. - -Reline:: - - * New stdlib that is compatible with readline stdlib by pure Ruby and also - has a multiline mode. - -RSS:: - - * Upgrade to RSS 0.2.8. - See https://github.com/ruby/rss/blob/master/NEWS.md. - -RubyGems:: - - * Upgrade to RubyGems 3.1.0.pre1 - Bundled from https://github.com/rubygems/rubygems/commit/97b264f0fa248c864b6ee9a23d3ff1cdd217dddb - -=== Compatibility issues (excluding feature bug fixes) - -=== Stdlib compatibility issues (excluding feature bug fixes) - -profile.rb, Profiler__:: - - * Removed from standard library. No one maintains it from Ruby 2.0.0. - -=== C API updates - -=== Implementation improvements - -Fiber:: - - * Allow selecting different coroutine implementation by using - `--with-coroutine=`, e.g. - - ./confgure --with-coroutine=ucontext - ./confgure --with-coroutine=copy - - * Replace previous stack cache with fiber pool cache. The fiber pool - allocates many stacks in a single memory region. Stack allocation - becomes O(log N) and fiber creation is amortized O(1). Around 10x - performance improvement was measured in micro-benchmarks. - -Thread:: - - * VM stack memory allocation is now combined with native thread stack, - improving thread allocation performance and reducing allocation related - failures. ~10x performance improvement was measured in micro-benchmarks. - -JIT:: - - * JIT-ed code is recompiled to less-optimized code when an optimization assumption is invalidated. - - * Method inlining is performed when a method is considered as pure. - This optimization is still experimental and many methods are NOT considered as pure yet. - - * Default value of +--jit-max-cache+ is changed from 1,000 to 100 - - * Default value of +--jit-min-calls+ is changed from 5 to 10,000 - -=== Miscellaneous changes - -* Support for IA64 architecture has been removed. Hardware for testing was - difficult to find, native fiber code is difficult to implement, and it added - non-trivial complexity to the interpreter. [Feature #15894] - -* Require compilers to support C99 [Misc #15347] - - * Details of our dialect: https://bugs.ruby-lang.org/projects/ruby-trunk/wiki/C99 - -* Upstream repository is changed from Subversion to Git. - - * https://git.ruby-lang.org/ruby.git - - * RUBY_REVISION class is changed from Integer to String. - - * RUBY_DESCRIPTION includes Git revision instead of Subversion's one. |