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Diffstat (limited to 'NEWS')
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@@ -1,283 +0,0 @@ -# -*- rdoc -*- - -= NEWS for Ruby 2.6.0 - -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 2.5.0 release - -=== Language changes - -* $SAFE is a process global state and we can set 0 again. [Feature #14250] - -* refinements take place at block passing. [Feature #14223] - -* `else` without `rescue` now causes a syntax error. [EXPERIMENTAL] - -* constant names may start with a non-ASCII capital letter. [Feature #13770] - -* An endless range is introduced. You can write a range that has no end, like `(0..)`. - The following shows typical use cases. [Feature #12912] - - ary[1..] # identical to ary[1..-1] - (1..).each {|index| ... } # infinite loop from index 1 - ary.zip(1..) {|elem, index| ... } # ary.each.with_index(1) { } - -=== Core classes updates (outstanding ones only) - -* Array - - * Aliased methods: - - * Array#filter is a new alias for Array#select [Feature #13784] - * Array#filter! is a new alias for Array#select! [Feature #13784] - -* Binding - - * New methods: - - * added Binding#source_location. [Feature #14230] - - This method returns the source location of binding, a 2-element - array of `__FILE__` and `__LINE__`. Traditionally, the same - information could be retrieved by `eval("[__FILE__, __LINE__]", - binding)`, but we are planning to change this behavior so that - `Kernel#eval` ignores binding's source location [Bug #4352]. - So, users should use this newly-introduced method instead of - `Kernel#eval`. - -* Dir - - * New methods: - - * added Dir#each_child and Dir#children instance methods. [Feature #13969] - -* Enumerable - - * Aliased methods: - - * Enumerable#filter is a new alias for Enumerable#select [Feature #13784] - -* Enumerator::Lazy - - * Aliased methods: - - * Enumerator::Lazy#filter is a new alias for Enumerator::Lazy#select [Feature #13784] - -* Exception - - * Exception#full_message takes :highlight and :order options [Bug #14324] - -* Hash - - * Aliased methods: - - * Hash#filter is a new alias for Hash#select [Feature #13784] - * Hash#filter! is a new alias for Hash#select! [Feature #13784] - -* IO - - * new mode character 'x' to open files for exclusive access [Feature #11258] - -* Kernel - - * Kernel#then is a new alias for Kernel#yield_self [Feature #14594] - - * Kernel.#Complex takes :exception option to specify the way of error handling [Feature #12732] - - * Kernel.#Float takes :exception option to specify the way of error handling [Feature #12732] - - * Kernel.#Integer takes :exception option to specify the way of error handling [Feature #12732] - - * Kernel.#Rational takes :exception option to specify the way of error handling [Feature #12732] - - * Kernel.#system takes :exception option to raise an exception on - failure. [Feature #14386] - -* KeyError - - * KeyError#initialize accepts :receiver and :key options to set receiver and key in Ruby code. [Feature #14313] - -* NameError - - * NameError#initialize accepts :receiver option to set receiver in Ruby code. [Feature #14313] - -* NoMethodError - - * NoMethodError#initialize accepts :receiver option to set receiver in Ruby code. [Feature #14313] - -* Proc - - * Proc#call doesn't change $SAFE any more. [Feature #14250] - -* Random - - * New methods: - - * added Random.bytes. [Feature #4938] - -* Range - - * Range#=== now uses #cover? instead of #include? method. [Feature #14575] - -* RubyVM::AST - - * RubyVM::AST.parse parses a given string and returns AST nodes. [experimental] - * RubyVM::AST.parse_file parses a given file and returns AST nodes. [experimental] - -* String - - * String#split yields each substring to the block if given. [Feature #4780] - -* TracePoint - - * New methods: - - * TracePoint#parameters [Feature #14694] - -=== Stdlib updates (outstanding ones only) - -* ERB - - * Add :trim_mode and :eoutvar keyword arguments to ERB.new. Now non-keyword arguments other than first one - are softly deprecated and will be removed when Ruby 2.5 becomes EOL. [Feature #14256] - - * erb command's -S option is deprecated, which will be removed in the next version. - -* FileUtils - - * New method: - - * FileUtils#cp_lr [Feature #4189] - -* Matrix - - * New method: - - * Matrix#antisymmetric? - -* Net - - * New method: - - * Add write_timeout keyword argument to Net::BufferedIO.new. [Feature #13396] - - * Add Net::BufferedIO#write_timeout, Net::BufferedIO#write_timeout=, - Net::HTTP#write_timeout, and Net::HTTP#write_timeout=. [Feature #13396] - - * New constant: - - * Add Net::HTTPClientException to deprecate Net::HTTPServerException, - whose name is misleading. [Bug #14688] - -* REXML - - * Improved some XPath implementations: - - * concat() function: Stringify all arguments before concatenating - - * string() function: Support context node - - * string() function: Support processing instruction node - - * Support "*:#{ELEMENT_NAME}" syntax in XPath 2.0 - - * Fixed some XPath implementations: - - * "//#{ELEMENT_NAME}[#{POSITION}]" case - - * string() function: Fix function(document) returns nodes that are - out of root elements. - - * "/ #{ELEMENT_NAME} " case - - * "/ #{ELEMENT_NAME} [ #{PREDICATE} ]" case - - * "/ #{AXIS}:: #{ELEMENT_NAME} " case - - * "#{N}-#{M}" case: One ore more white spaces were required before "-" - - * "/child::node()" case - - * "#{FUNCTION}()/#{PATH}" case - - * "@#{ATTRIBUTE}/parent::" case - - * "name(#{NODE_SET})" case - -* RSS - - * RSS::Parser.parse: Accept options as Hash. :validate, - :ignore_unknown_element, :parser_class options are available. - -* Set - - * Aliased methods: - - * Set#filter! is a new alias for Set#select! [Feature #13784] - -* URI - - * Add URI::File to handle file URI scheme [Feature #14035] - -=== Compatibility issues (excluding feature bug fixes) - -* File - - * File.read, File.binread, File.write, File.binwrite, File.foreach, - and File.readlines do not invoke external commands even if the path - starts with the pipe character |. [Feature #14245] - -* Dir - - * Dir.glob with '\0'-separated pattern list will be deprecated, and - is now warned. [Feature #14643] - -=== Stdlib compatibility issues (excluding feature bug fixes) - -=== C API updates - -=== Supported platform changes - -=== Implementation improvements - -* Speedup `Proc#call` because we don't need to care about `$SAFE` any more. [Feature #14318] - With `lc_fizzbuzz` benchmark which uses so many `Proc#call` we can measure - x1.4 improvements [Bug #10212]. - -* Speedup `block.call` where `block` is passed block parameter. [Feature #14330] - Ruby 2.5 improves block passing performance. [Feature #14045] - Additionally, Ruby 2.6 improves the performance of passed block calling. - -* Introduce an initial implementation of JIT (Just-in-time) compiler. [Feature #14235] [experimental] - * `--jit` option is added to enable JIT. `--jit-verbose=1` is good for inspection. See `ruby --help` for others. - * This JIT relies on C compiler used to build Ruby, on runtime. Only gcc and clang are supported for the JIT - for now, and MinGW support has some issues. - * As of 2.6.0-preview1, we're just preparing infrastructure for JIT and very few optimizations are implemented. - So it's not ready for benchmarking Ruby's JIT performance yet. It's known that current JIT enablement makes - Rails application slower for now. - -* VM generator script renewal; makes the generated VM more optimized. [GH-1779] - -* Thread cache enabled for pthreads platforms - (for `Thread.new` and `Thread.start`) [Feature #14757] - -=== Miscellaneous changes - -* On macOS, shared libraries no longer include a full version number of ruby in their names. - This eliminates the burden of each teeny upgrade on the platform that users need to rebuild every extension library. - - * Before: - * libruby.2.6.0.dylib - * libruby.2.6.dylib -> libruby.2.6.0.dylib - * libruby.dylib -> libruby.2.6.0.dylib - - * After: - * libruby.2.6.dylib - * libruby.dylib -> libruby.2.6.dylib |