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572 lines
16 KiB
Text
572 lines
16 KiB
Text
# -*- rdoc -*-
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= NEWS for Ruby 2.5.0
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This document is a list of user visible feature changes made between
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releases except for bug fixes.
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Note that each entry is kept so brief that no reason behind or
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reference information is supplied with. For a full list of changes
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with all sufficient information, see the ChangeLog file or Redmine
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(e.g. <tt>https://bugs.ruby-lang.org/issues/$FEATURE_OR_BUG_NUMBER</tt>)
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== Changes since the 2.4.0 release
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=== Language changes
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* Top-level constant look-up is removed. [Feature #11547]
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* rescue/else/ensure are allowed inside do/end blocks. [Feature #12906]
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* refinements take place in string interpolations. [Feature #13812]
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=== Core classes updates (outstanding ones only)
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* Array
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* New methods:
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* Array#append [Feature #12746]
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* Array#prepend [Feature #12746]
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* Data
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* Is deprecated. It was a base class for C extensions, and it's not
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necessary to expose in Ruby level. [Feature #3072]
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* Exception
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* New methods:
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* Exception#full_message to retrieve a String expression of an exception,
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formatted in the same way in which Ruby prints out an uncaught exception.
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[Feature #14141] [experimental]
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* Dir
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* Dir.glob provides new optional keyword argument, :base.
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[Feature #13056]
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* Dir.chdir (without block arg), Dir.open, Dir.new, Dir.mkdir, Dir.rmdir,
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Dir.empty? releases GVL
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* New methods:
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* Dir.children [Feature #11302]
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* Dir.each_child [Feature #11302]
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* Enumerable
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* Enumerable#{any?,all?,none?,one?} accept a pattern argument [Feature #11286]
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* File
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* File.open accepts :newline option to imply text mode. [Bug #13350]
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* File#path raises an IOError for files opened with
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File::Constants::TMPFILE option. [Feature #13568]
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* File.stat, File.exist?, and other rb_stat()-using methods release GVL
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[Bug #13941]
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* File.rename releases GVL [Feature #13951]
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* File::Stat#{atime,mtime,ctime} support fractional second timestamps on
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Windows 8 and later [Feature #13726]
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* File::Stat#ino and File.indentical? support ReFS 128bit ino on Windows 8.1
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and later [Feature #13731]
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* File.readable?, File.readable_real?, File.writable?, File.writable_real?,
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File.executable?, File.executable_real?, File.mkfifo, File.readlink,
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File.truncate, File#truncate, File.chmod, File.lchmod, File.chown,
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File.lchown, File.unlink, File.utime, File.lstat release GVL
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* New method:
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* File.lutime [Feature #4052]
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* Hash
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* New methods:
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* Hash#transform_keys [Feature #13583]
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* Hash#transform_keys! [Feature #13583]
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* Hash#slice [Feature #8499]
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* IO
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* IO.copy_stream tries copy offload with copy_file_range(2) [Feature #13867]
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* New methods:
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* IO#pread [Feature #4532]
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* IO#pwrite [Feature #4532]
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* IO#write accepts multiple arguments [Feature #9323]
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* IOError
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* IO#close might raise an error with message "stream closed",
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but it is refined to "stream closed in another thread". The new message
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is more clear for user.
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[Bug #13405]
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* Integer
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* Integer#{round,floor,ceil,truncate} always return an Integer.
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[Bug #13420]
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* Integer#pow accepts modulo argument for calculating modular
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exponentiation. [Feature #12508] [Feature #11003]
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* New methods:
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* Integer#allbits?, Integer#anybits?, Integer#nobits? [Feature #12753]
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* Integer.sqrt [Feature #13219]
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* Kernel
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* Kernel#yield_self [Feature #6721]
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* Kernel#pp [Feature #14123]
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* Kernel#warn(..., uplevel:n) [Feature #12882]
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* Method
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* New methods:
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* Method#=== that invokes Method#call, as same as Proc#=== [Feature #14142]
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* Module
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* Module#{attr,attr_accessor,attr_reader,attr_writer} become public [Feature #14132]
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* Module#{define_method,alias_method,undef_method,remove_method} become public [Feature #14133]
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* Numeric
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* Numeric#step no longer hides errors from coerce method when
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given a step value which cannot be compared with #> to 0.
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[Feature #7688]
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* Numerical comparison operators (<,<=,>=,>) no longer hide exceptions
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from #coerce method internally. Return nil in #coerce if the coercion is
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impossible. [Feature #7688]
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* Process
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* Precision of Process.times is improved if getrusage(2) exists. [Feature #11952]
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* New method:
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* Process.last_status as an alias of $? [Feature #14043]
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* Range
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* Range#initialize no longer hides exceptions when comparing begin and
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end with #<=> and raise a "bad value for range" ArgumentError
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but instead lets the exception from the #<=> call go through.
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[Feature #7688]
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* Regexp
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* Update to Onigmo 6.1.3-669ac9997619954c298da971fcfacccf36909d05.
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* Support absence operator https://github.com/k-takata/Onigmo/issues/82
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* Support new 5 emoji-related Unicode character properties
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* RubyVM::InstructionSequence
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* New method:
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* RubyVM::InstructionSequence#each_child
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* RubyVM::InstructionSequence#trace_points
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* String
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* String#-@ deduplicates unfrozen strings. Already-frozen
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strings remain unchanged for compatibility. [Feature #13077]
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* -"literal" (String#-@) optimized to return the same object
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(same as "literal".freeze in Ruby 2.1+) [Feature #13295]
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* String#{casecmp,casecmp?} return nil for non-string arguments
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instead of raising a TypeError. [Bug #13312]
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* String#start_with? accepts a regexp [Feature #13712]
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* New methods:
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* String#delete_prefix, String#delete_prefix! [Feature #12694]
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* String#delete_suffix, String#delete_suffix! [Feature #13665]
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* String#each_grapheme_cluster and String#grapheme_clusters to
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enumerate grapheme clusters [Feature #13780]
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* String#undump to unescape String#dump'ed string [Feature #12275]
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* Struct
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* Struct.new takes `keyword_init: true` option to initialize members
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with keyword arguments. [Feature #11925]
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* Regexp/String: Update Unicode version from 9.0.0 to 10.0.0 [Feature #13685]
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* Thread
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* Description set by Thread#name= is now visible on Windows 10.
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* New method:
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* Thread#fetch [Feature #13009]
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* The default of Thread.report_on_exception is now true,
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showing unhandled exceptions terminating threads on $stderr.
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[Feature #14143]
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* Time
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* Time.at receives 3rd argument which specifies the unit of 2nd argument.
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[Feature #13919]
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* KeyError
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* New methods:
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* KeyError#receiver [Feature #12063]
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* KeyError#key [Feature #12063]
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* FrozenError
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* New exception class. [Feature #13224]
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=== Stdlib updates (outstanding ones only)
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* BigDecimal
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* Update to BigDecimal 1.3.4
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* The following features are added:
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* BigDecimal::VERSION
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* The following features have been deprecated,
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and are planned to be removed in the version 1.4.0:
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* BigDecimal.new
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* BigDecimal.ver
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* BigDecimal#clone and #dup now do not make a new instance,
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but returns the receiver itself.
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* Coverage
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* Support branch coverage and method coverage measurement. [Feature #13901]
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Branch coverage tells you which branches are executed, and which not.
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Method coverage tells you which methods are invoked, and which not.
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By running a test suite with this new feature, you can know which branches
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and methods are executed by a test, and evaluate total coverage of a test
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suite more strictly.
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You can specify the measuring target by an option to `Coverage.start`:
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Coverage.start(lines: true, branches: true, methods: true)
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After some Ruby files are loaded, you can use `Coverage.result` to get
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the coverage result:
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Coverage.result
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#=> { "/path/to/file.rb"=>
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# { :lines => [1, 2, 0, nil, ...],
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# :branches =>
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# { [:if, 0, 2, 1, 6, 4] =>
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# { [:then, 1, 3, 2, 3, 8] => 0,
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# [:else, 2, 5, 2, 5, 8] => 2
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# }
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# },
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# :methods => {
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# [Object, :foo, 1, 0, 7, 3] => 2
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# }
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# }
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# }
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The result type of line coverage is not changed; it is just an array that
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contains numbers, which means the count that each line was executed,
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or `nil`s, which means that the line is not relevant.
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The result type of branch coverage is:
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{ (jump base) => { (jump target) => (counter) } }
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where jump base and targets have the format
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[type, unique-id, start lineno, start column, end lineno, end column]
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For example, `[:if, 0, 2, 1, 6, 4]` reads an `if` statement that ranges from
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line 2 and column 1, to line 6 and column 4. `[:then, 1, 3, 2, 3, 8]` reads
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a `then` clause that ranges from line 3 and column 2, to line 3 and column 8.
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Note that lineno starts from 1, and that columnno starts from 0. So, the
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above example shows a branch from the `if` to the `then` was never executed,
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and a branch from the `if` to the `else` was executed twice.
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The result type of method coverage is:
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{ (method key) => (counter) }
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where method key has the format
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[class, method-name, start lineno, start column, end lineno, end column]
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For example, `[Object, :foo, 1, 0, 7, 3]` reads `Object#foo` that ranges from
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line 1 and column 0, to line 7 and column 3. The above example shows this
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`Object#foo` was invoked twice.
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Note: To keep compatibility, passing no option to `Coverage.start` will measure
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only line coverage, and `Coverage.result` will return the old format:
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Coverage.result
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#=> { "/path/to/file.rb"=> [1, 2, 0, nil, ...] }
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* DRb
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* ACL::ACLEntry.new no longer suppresses IPAddr::InvalidPrefixError.
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* ERB
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* Add ERB#result_with_hash to render a template with local variables passed
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with a Hash object. [Feature #8631]
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* Default template file encoding is changed from ASCII-8BIT to UTF-8 in erb
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command. [Bug #14095]
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* Carriage returns are changed to be trimmed properly if trim_mode is specified
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and used. Duplicated newlines will be removed on Windows. [Bug #5339] [Bug #11464]
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* IPAddr
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* IPAddr no longer accepts invalid address mask. [Bug #13399]
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* IPAddr#{ipv4_compat,ipv4_compat?} are marked for deprecation. [Bug #13769]
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* New methods:
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* IPAddr#prefix
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* IPAddr#loopback?
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* IPAddr#private? [Feature #11666]
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* IPAddr#link_local? [Feature #10912]
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* IRB
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* Print backtrace and error message in reverse order [Feature #8661] [experimental]
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* `binding.irb` automatically requires irb and runs [Bug #13099] [experimental]
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* `binding.irb` on its start shows source around the line where it was called
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[Feature #14124]
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* Matrix
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* New methods:
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* Matrix.combine and Matrix#combine [Feature #10903]
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* Matrix#{hadamard_product,entrywise_product}
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* Net::HTTP
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* Net::HTTP.new supports no_proxy parameter [Feature #11195]
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* Net::HTTP#{min_version,max_version} [Feature #9450]
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* Add more HTTP status classes
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* Net::HTTP::STATUS_CODES is added as HTTP Status Code Repository [Misc #12935]
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* Net::HTTP#{proxy_user,proxy_pass} reflect http_proxy environment variable
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if the system's environment variable is multiuser safe. [Bug #12921]
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* open-uri
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* URI.open method defined as an alias to open-uri's Kernel.open.
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open-uri's Kernel.open will be deprecated in future.
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* OpenSSL
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* Updated Ruby/OpenSSL from version 2.0 to 2.1. Changes are noted in
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"Version 2.1.0" section in ext/openssl/History.md.
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* Pathname
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* New method:
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* Pathname#glob [Feature #7360]
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* Psych
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* Update to Psych 3.0.2.
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* Convert fallback option to a keyword argument
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https://github.com/ruby/psych/pull/342
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* Add :symbolize_names option to Psych.load, Psych.safe_load like JSON.parse
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https://github.com/ruby/psych/pull/333, https://github.com/ruby/psych/pull/337
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* Add Psych::Handler#event_location
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https://github.com/ruby/psych/pull/326
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* Make frozen string literal = true
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https://github.com/ruby/psych/pull/320
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* Preserve time zone offset when deserializing times
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https://github.com/ruby/psych/pull/316
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* Remove deprecated method aliases for syck gem
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https://github.com/ruby/psych/pull/312
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* RbConfig
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* RbConfig::LIMITS is added to provide the limits of C types.
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This is available when rbconfig/sizeof is loaded.
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* Ripper
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* Ripper::EXPR_BEG and so on for Ripper#state.
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* New method:
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* Ripper#state to tell the state of scanner. [Feature #13686]
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* RDoc
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* Update to RDoc 6.0.1.
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* Replace IRB based lexer with Ripper.
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* https://github.com/ruby/rdoc/pull/512
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* This much improves the speed of generating documents.
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* It also facilitates supporting new syntax in the future.
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* Support many new syntaxes of Ruby from the past few years.
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* Use "frozen_string_literal: true".
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Performance survey: https://gist.github.com/aycabta/abdfaa75ea8a6877eeb734e942e73800
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* Support did_you_mean.
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* Rubygems
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* Update to Rubygems 2.7.3.
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* http://blog.rubygems.org/2017/11/28/2.7.3-released.html
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* http://blog.rubygems.org/2017/11/08/2.7.2-released.html
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* http://blog.rubygems.org/2017/11/03/2.7.1-released.html
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* http://blog.rubygems.org/2017/11/01/2.7.0-released.html
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* http://blog.rubygems.org/2017/10/09/2.6.14-released.html
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* http://blog.rubygems.org/2017/08/27/2.6.13-released.html
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* SecureRandom
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* New method:
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* SecureRandom.alphanumeric
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* Set
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* New methods:
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* Set#to_s as alias to #inspect [Feature #13676]
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* Set#=== as alias to #include? [Feature #13801]
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* Set#reset [Feature #6589]
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* StringIO
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* StringIO#write accepts multiple arguments
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* StringScanner
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* New methods:
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* StringScanner#size, StringScanner#captures, StringScanner#values_at [Feature #836]
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* URI
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* Relative path operations no longer collapse consecutive slashes to a single slash. [Bug #8352]
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* WEBrick
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* Add Server Name Indication (SNI) support [Feature #13729]
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* support Proc objects as body responses [Feature #855]
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* released as a RubyGem [Feature #13173]
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* avoid unintended behavior from Kernel#open [Misc #14216]
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* Zlib
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* Zlib::GzipWriter#write accepts multiple arguments
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=== Compatibility issues (excluding feature bug fixes)
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* Socket
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* BasicSocket#read_nonblock and BasicSocket#write_nonblock no
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longer set the O_NONBLOCK file description flag as side effect
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(on Linux only) [Feature #13362]
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* Random
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* Random.raw_seed renamed to become Random.urandom. It is now
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applicable to non-seeding purposes due to [Bug #9569].
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* Socket
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* Socket::Ifaddr#vhid is added [Feature #13803]
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* ConditionVariable, Queue and SizedQueue reimplemented for speed.
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They no longer subclass Struct. [Feature #13552]
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=== Stdlib compatibility issues (excluding feature bug fixes)
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* Gemification
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* Promote following standard libraries to default gems.
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* cmath
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* csv
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* date
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* dbm
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* etc
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* fcntl
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* fiddle
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* fileutils
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* gdbm
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* ipaddr
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* scanf
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* sdbm
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* stringio
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* strscan
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* webrick
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* zlib
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* Logger
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* Logger.new("| command") had been working to open a command
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unintentionally. It was prohibited, and now Logger#initialize
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treats a String argument only as a filename, as its specification.
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[Bug #14212]
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* Net::HTTP
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* Net::HTTP#start now passes :ENV to p_addr by default. [Bug #13351]
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To avoid this, pass nil explicitly.
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* mathn.rb
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* Removed from stdlib. [Feature #10169]
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* Rubygems
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* Removed "ubygems.rb" file from stdlib. It's needless since Ruby 1.9.
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=== C API updates
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=== Supported platform changes
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* Drop support of NaCl platform
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* https://bugs.chromium.org/p/chromium/issues/detail?id=239656#c160
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=== Implementation improvements
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* (This might not be a "user visible feature change" but) Hash class's
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hash function is now SipHash13. [Feature #13017]
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* SecureRandom now prefers OS-provided sources than OpenSSL. [Bug #9569]
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* Mutex rewritten to be smaller and faster [Feature #13517]
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* Performance of block passing using block parameters is improved by
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lazy Proc allocation [Feature #14045]
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* Dynamic instrumentation for TracePoint hooks instead of using "trace"
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instruction to avoid overhead [Feature #14104]
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* ERB now generates code from a template twice as fast as Ruby 2.4
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=== Miscellaneous changes
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* Print backtrace and error message in reverse order if $stderr is unchanged and a tty.
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[Feature #8661] [experimental]
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* Print error message in bold/underlined text if $stderr is unchanged and a tty.
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[Feature #14140] [experimental]
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* configure option --with-ext now mandates its arguments. So for
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instance if you run ./configure --with-ext=openssl,+ then the
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openssl library is guaranteed compiled, otherwise the build fails
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abnormally.
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Note however to always add the ",+" at the end of the argument.
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Otherwise nothing but openssl are built. [Feature #13302]
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