NEWS: converted to Markdown [ci skip]
* NEWS: Converted to Markdown format, from (wrongly) Markdown-mixed RDoc format. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64445 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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# -*- rdoc -*-
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# -*- markdown -*- markup: Markdown
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= NEWS for Ruby 2.6.0
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# NEWS for Ruby 2.6.0
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This document is a list of user visible feature changes made between
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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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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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Note that each entry is kept so brief that no reason behind or reference
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reference information is supplied with. For a full list of changes
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information is supplied with. For a full list of changes with all
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with all sufficient information, see the ChangeLog file or Redmine
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sufficient information, see the ChangeLog file or Redmine
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(e.g. <tt>https://bugs.ruby-lang.org/issues/$FEATURE_OR_BUG_NUMBER</tt>)
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(e.g. `https://bugs.ruby-lang.org/issues/$FEATURE_OR_BUG_NUMBER`)
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== Changes since the 2.5.0 release
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## Changes since the 2.5.0 release
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=== Language changes
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### Language changes
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* $SAFE is a process global state and we can set 0 again. [Feature #14250]
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* `$SAFE` is a process global state and we can set 0 again.
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[Feature #14250]
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* refinements take place at block passing. [Feature #14223]
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* refinements take place at block passing. [Feature #14223]
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* `else` without `rescue` now causes a syntax error. [EXPERIMENTAL]
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* `else` without `rescue` now causes a syntax error. [EXPERIMENTAL]
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* constant names may start with a non-ASCII capital letter. [Feature #13770]
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* constant names may start with a non-ASCII capital letter.
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[Feature #13770]
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* An endless range is introduced. You can write a range that has no end, like `(0..)`.
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* An endless range is introduced. You can write a range that has no end,
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The following shows typical use cases. [Feature #12912]
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like `(0..)`. The following shows typical use cases. [Feature #12912]
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```ruby
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ary[1..] # identical to ary[1..-1]
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ary[1..] # identical to ary[1..-1]
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(1..).each {|index| ... } # infinite loop from index 1
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(1..).each {|index| ... } # infinite loop from index 1
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ary.zip(1..) {|elem, index| ... } # ary.each.with_index(1) { }
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ary.zip(1..) {|elem, index| ... } # ary.each.with_index(1) { }
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```
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* Non-Symbol key in keyword arguments hash causes an exception.
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* Non-`Symbol` key in keyword arguments hash causes an exception.
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=== Core classes updates (outstanding ones only)
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### Core classes updates (outstanding ones only)
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* Array
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* `Array`
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* Aliased methods:
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* Aliased methods:
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* Array#filter is a new alias for Array#select [Feature #13784]
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* `Array#filter` is a new alias for `Array#select`.
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* Array#filter! is a new alias for Array#select! [Feature #13784]
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[Feature #13784]
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* `Array#filter!` is a new alias for `Array#select!`.
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[Feature #13784]
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* Binding
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* `Binding`
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* New methods:
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* New methods:
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* added Binding#source_location. [Feature #14230]
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* added `Binding#source_location`. [Feature #14230]
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This method returns the source location of binding, a 2-element
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This method returns the source location of binding, a 2-element
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array of `__FILE__` and `__LINE__`. Traditionally, the same
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array of `__FILE__` and `__LINE__`. Traditionally, the same
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information could be retrieved by `eval("[__FILE__, __LINE__]",
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information could be retrieved by `eval("[__FILE__, __LINE__]",
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binding)`, but we are planning to change this behavior so that
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binding)`, but we are planning to change this behavior so that
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`Kernel#eval` ignores binding's source location [Bug #4352].
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`Kernel#eval` ignores binding's source location [Bug #4352].
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So, users should use this newly-introduced method instead of
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So, users should use this newly-introduced method instead of
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`Kernel#eval`.
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`Kernel#eval`.
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* Dir
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* `Dir`
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* New methods:
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* New methods:
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* added Dir#each_child and Dir#children instance methods. [Feature #13969]
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* added `Dir#each_child` and `Dir#children` instance methods.
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[Feature #13969]
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* Enumerable
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* `Enumerable`
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* Aliased methods:
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* Aliased methods:
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* Enumerable#filter is a new alias for Enumerable#select [Feature #13784]
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* `Enumerable#filter` is a new alias for `Enumerable#select`.
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[Feature #13784]
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* Enumerator::Lazy
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* `Enumerator::Lazy`
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* Aliased methods:
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* Aliased methods:
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* Enumerator::Lazy#filter is a new alias for Enumerator::Lazy#select [Feature #13784]
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* `Enumerator::Lazy#filter` is a new alias for
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`Enumerator::Lazy#select`. [Feature #13784]
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* Exception
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* `Exception`
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* Exception#full_message takes :highlight and :order options [Bug #14324]
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* `Exception#full_message` takes `:highlight` and `:order` options.
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[Bug #14324]
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* Hash
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* `Hash`
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* Aliased methods:
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* Aliased methods:
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* Hash#filter is a new alias for Hash#select [Feature #13784]
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* `Hash#filter` is a new alias for `Hash#select`. [Feature #13784]
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* Hash#filter! is a new alias for Hash#select! [Feature #13784]
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* `Hash#filter!` is a new alias for `Hash#select!`.
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[Feature #13784]
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* IO
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* `IO`
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* new mode character 'x' to open files for exclusive access [Feature #11258]
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* new mode character `'x'` to open files for exclusive access.
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[Feature #11258]
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* Kernel
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* `Kernel`
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* Kernel#then is a new alias for Kernel#yield_self [Feature #14594]
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* `Kernel#then` is a new alias for `Kernel#yield_self`.
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[Feature #14594]
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* Kernel.#Complex takes :exception option to specify the way of error handling [Feature #12732]
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* `Kernel.#Complex` takes `:exception` option to specify the way of
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error handling. [Feature #12732]
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* Kernel.#Float takes :exception option to specify the way of error handling [Feature #12732]
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* `Kernel.#Float` takes `:exception` option to specify the way of error
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handling. [Feature #12732]
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* Kernel.#Integer takes :exception option to specify the way of error handling [Feature #12732]
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* `Kernel.#Integer` takes `:exception` option to specify the way of
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error handling. [Feature #12732]
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* Kernel.#Rational takes :exception option to specify the way of error handling [Feature #12732]
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* `Kernel.#Rational` takes `:exception` option to specify the way of
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error handling. [Feature #12732]
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* Kernel.#system takes :exception option to raise an exception on
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* `Kernel.#system` takes `:exception` option to raise an exception on
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failure. [Feature #14386]
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failure. [Feature #14386]
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* incompatible changes:
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* incompatible changes:
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* system() and exec() do not close non-standard file descriptors
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* `system()` and `exec()` do not close non-standard file descriptors
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(The default of :close_others option is changed to false by default.
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(The default of `:close_others` option is changed to false by
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but we still set the FD_CLOEXEC flag on descriptors we create) [Misc #14907]
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default. but we still set the `FD_CLOEXEC` flag on descriptors we
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create). [Misc #14907]
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* KeyError
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* `KeyError`
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* KeyError#initialize accepts :receiver and :key options to set receiver and key in Ruby code. [Feature #14313]
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* `KeyError#initialize` accepts `:receiver` and `:key` options to set
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receiver and key in Ruby code. [Feature #14313]
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* Module
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* `Module`
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* Module#method_defined?, Module#private_method_defined? and Module#protected_method_defined? now accepts the second parameter as optional. If it's true (=default), checks ancestor modules/classes, or checks only the class itself. [Feature #14944]
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* `Module#method_defined?`, `Module#private_method_defined?` and
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`Module#protected_method_defined?` now accepts the second parameter as
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optional. If it's `true` (=default), checks ancestor modules/classes,
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or checks only the class itself. [Feature #14944]
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* NameError
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* `NameError`
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* NameError#initialize accepts :receiver option to set receiver in Ruby code. [Feature #14313]
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* `NameError#initialize` accepts `:receiver` option to set receiver in
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Ruby code. [Feature #14313]
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* NoMethodError
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* `NoMethodError`
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* NoMethodError#initialize accepts :receiver option to set receiver in Ruby code. [Feature #14313]
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* `NoMethodError#initialize` accepts `:receiver` option to set receiver
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in Ruby code. [Feature #14313]
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* Proc
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* `Proc`
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* Proc#call doesn't change $SAFE any more. [Feature #14250]
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* `Proc#call` doesn't change `$SAFE` any more. [Feature #14250]
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* Random
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* `Random`
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|
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* New methods:
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* New methods:
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|
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* added Random.bytes. [Feature #4938]
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* added `Random.bytes`. [Feature #4938]
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* Range
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* `Range`
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|
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* Range#=== now uses #cover? instead of #include? method. [Feature #14575]
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* `Range#===` now uses `#cover?` instead of `#include?` method.
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[Feature #14575]
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* RubyVM::AST
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* `RubyVM::AST`
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|
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* RubyVM::AST.parse parses a given string and returns AST nodes. [experimental]
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* `RubyVM::AST.parse` parses a given string and returns AST nodes.
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* RubyVM::AST.parse_file parses a given file and returns AST nodes. [experimental]
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[experimental]
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* `RubyVM::AST.parse_file` parses a given file and returns AST nodes.
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[experimental]
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* String
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* `String`
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|
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* String#split yields each substring to the block if given. [Feature #4780]
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* `String#split` yields each substring to the block if given.
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[Feature #4780]
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|
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* TracePoint
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* `TracePoint`
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|
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* New methods:
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* New methods:
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|
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* TracePoint#parameters [Feature #14694]
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* `TracePoint#parameters` [Feature #14694]
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|
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=== Stdlib updates (outstanding ones only)
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### Stdlib updates (outstanding ones only)
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|
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* ERB
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* `ERB`
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|
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* Add :trim_mode and :eoutvar keyword arguments to ERB.new. Now non-keyword arguments other than first one
|
* Add `:trim_mode` and `:eoutvar` keyword arguments to `ERB.new`. Now
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are softly deprecated and will be removed when Ruby 2.5 becomes EOL. [Feature #14256]
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non-keyword arguments other than first one are softly deprecated and
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will be removed when Ruby 2.5 becomes EOL. [Feature #14256]
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|
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* erb command's -S option is deprecated, which will be removed in the next version.
|
* erb command's `-S` option is deprecated, which will be removed in the
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next version.
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|
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* FileUtils
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* `FileUtils`
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|
|
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* New method:
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* New method:
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|
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* FileUtils#cp_lr [Feature #4189]
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* `FileUtils#cp_lr`. [Feature #4189]
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|
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* Matrix
|
* `Matrix`
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|
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* New method:
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* New method:
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|
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* Matrix#antisymmetric?
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* `Matrix#antisymmetric?`
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|
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* Net
|
* `Net`
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|
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* New method:
|
* New method:
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|
|
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* Add write_timeout keyword argument to Net::BufferedIO.new. [Feature #13396]
|
* Add `:write_timeout` keyword argument to `Net::BufferedIO.new`.
|
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|
[Feature #13396]
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|
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* Add Net::BufferedIO#write_timeout, Net::BufferedIO#write_timeout=,
|
* Add `Net::BufferedIO#write_timeout`,
|
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Net::HTTP#write_timeout, and Net::HTTP#write_timeout=. [Feature #13396]
|
`Net::BufferedIO#write_timeout=`, `Net::HTTP#write_timeout`, and
|
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|
`Net::HTTP#write_timeout=`. [Feature #13396]
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|
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* New constant:
|
* New constant:
|
||||||
|
|
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* Add Net::HTTPClientException to deprecate Net::HTTPServerException,
|
* Add `Net::HTTPClientException` to deprecate
|
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whose name is misleading. [Bug #14688]
|
`Net::HTTPServerException`, whose name is misleading. [Bug #14688]
|
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|
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* REXML
|
* `REXML`
|
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|
|
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* Improved some XPath implementations:
|
* Improved some XPath implementations:
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|
|
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* concat() function: Stringify all arguments before concatenating
|
* `concat()` function: Stringify all arguments before concatenating
|
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|
|
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* string() function: Support context node
|
* `string()` function: Support context node
|
||||||
|
|
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* string() function: Support processing instruction node
|
* `string()` function: Support processing instruction node
|
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|
|
||||||
* Support "*:#{ELEMENT_NAME}" syntax in XPath 2.0
|
* Support `"*:#{ELEMENT_NAME}"` syntax in XPath 2.0
|
||||||
|
|
||||||
* Fixed some XPath implementations:
|
* Fixed some XPath implementations:
|
||||||
|
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||||||
* "//#{ELEMENT_NAME}[#{POSITION}]" case
|
* `"//#{ELEMENT_NAME}[#{POSITION}]"` case
|
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|
|
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* string() function: Fix function(document) returns nodes that are
|
* `string()` function: Fix `function(document)` returns nodes that
|
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out of root elements.
|
are out of root elements.
|
||||||
|
|
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* "/ #{ELEMENT_NAME} " case
|
* `"/ #{ELEMENT_NAME} "` case
|
||||||
|
|
||||||
* "/ #{ELEMENT_NAME} [ #{PREDICATE} ]" case
|
* `"/ #{ELEMENT_NAME} [ #{PREDICATE} ]"` case
|
||||||
|
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* "/ #{AXIS}:: #{ELEMENT_NAME} " case
|
* `"/ #{AXIS}:: #{ELEMENT_NAME} "` case
|
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|
|
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* "#{N}-#{M}" case: One ore more white spaces were required before "-"
|
* `"#{N}-#{M}"` case: One ore more white spaces were required before
|
||||||
|
`"-"`
|
||||||
|
|
||||||
* "/child::node()" case
|
* `"/child::node()"` case
|
||||||
|
|
||||||
* "#{FUNCTION}()/#{PATH}" case
|
* `"#{FUNCTION}()/#{PATH}"` case
|
||||||
|
|
||||||
* "@#{ATTRIBUTE}/parent::" case
|
* `"@#{ATTRIBUTE}/parent::"` case
|
||||||
|
|
||||||
* "name(#{NODE_SET})" case
|
* `"name(#{NODE_SET})"` case
|
||||||
|
|
||||||
* RSS
|
* `RSS`
|
||||||
|
|
||||||
* RSS::Parser.parse: Accept options as Hash. :validate,
|
* `RSS::Parser.parse`: Accept options as `Hash`. `:validate`,
|
||||||
:ignore_unknown_element, :parser_class options are available.
|
`:ignore_unknown_element`, `:parser_class` options are available.
|
||||||
|
|
||||||
* Set
|
* `Set`
|
||||||
|
|
||||||
* Aliased methods:
|
* Aliased methods:
|
||||||
|
|
||||||
* Set#filter! is a new alias for Set#select! [Feature #13784]
|
* `Set#filter!` is a new alias for `Set#select!`. [Feature #13784]
|
||||||
|
|
||||||
* URI
|
* `URI`
|
||||||
|
|
||||||
* Add URI::File to handle file URI scheme [Feature #14035]
|
* Add `URI::File` to handle file URI scheme. [Feature #14035]
|
||||||
|
|
||||||
=== Compatibility issues (excluding feature bug fixes)
|
### Compatibility issues (excluding feature bug fixes)
|
||||||
|
|
||||||
* File
|
* `File`
|
||||||
|
|
||||||
* File.read, File.binread, File.write, File.binwrite, File.foreach,
|
* `File.read`, `File.binread`, `File.write`, `File.binwrite`,
|
||||||
and File.readlines do not invoke external commands even if the path
|
`File.foreach`, and `File.readlines` do not invoke external commands
|
||||||
starts with the pipe character |. [Feature #14245]
|
even if the path starts with the pipe character `'|'`.
|
||||||
|
[Feature #14245]
|
||||||
|
|
||||||
* Dir
|
* `Dir`
|
||||||
|
|
||||||
* Dir.glob with '\0'-separated pattern list will be deprecated, and
|
* `Dir.glob` with `'\0'`-separated pattern list will be deprecated, and
|
||||||
is now warned. [Feature #14643]
|
is now warned. [Feature #14643]
|
||||||
|
|
||||||
=== Stdlib compatibility issues (excluding feature bug fixes)
|
### Stdlib compatibility issues (excluding feature bug fixes)
|
||||||
|
|
||||||
=== C API updates
|
### C API updates
|
||||||
|
|
||||||
=== Supported platform changes
|
### Supported platform changes
|
||||||
|
|
||||||
=== Implementation improvements
|
### Implementation improvements
|
||||||
|
|
||||||
* Speedup `Proc#call` because we don't need to care about `$SAFE` any more. [Feature #14318]
|
* Speedup `Proc#call` because we don't need to care about `$SAFE` any more.
|
||||||
With `lc_fizzbuzz` benchmark which uses so many `Proc#call` we can measure
|
[Feature #14318]
|
||||||
x1.4 improvements [Bug #10212].
|
|
||||||
|
|
||||||
* Speedup `block.call` where `block` is passed block parameter. [Feature #14330]
|
With `lc_fizzbuzz` benchmark which uses so many `Proc#call` we can
|
||||||
Ruby 2.5 improves block passing performance. [Feature #14045]
|
measure x1.4 improvements. [Bug #10212]
|
||||||
Additionally, Ruby 2.6 improves the performance of passed block calling.
|
|
||||||
|
|
||||||
* Introduce an initial implementation of JIT (Just-in-time) compiler. [Feature #14235] [experimental]
|
* Speedup `block.call` where `block` is passed block parameter.
|
||||||
* `--jit` option is added to enable JIT. `--jit-verbose=1` is good for inspection. See `ruby --help` for others.
|
[Feature #14330]
|
||||||
* 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]
|
Ruby 2.5 improves block passing performance. [Feature #14045]
|
||||||
|
|
||||||
* Thread cache enabled for pthreads platforms
|
Additionally, Ruby 2.6 improves the performance of passed block calling.
|
||||||
(for `Thread.new` and `Thread.start`) [Feature #14757]
|
|
||||||
|
|
||||||
=== Miscellaneous changes
|
* 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.
|
||||||
|
|
||||||
* On macOS, shared libraries no longer include a full version number of ruby in their names.
|
* VM generator script renewal; makes the generated VM more optimized.
|
||||||
This eliminates the burden of each teeny upgrade on the platform that users need to rebuild every extension library.
|
[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:
|
* Before:
|
||||||
* libruby.2.6.0.dylib
|
* libruby.2.6.0.dylib
|
||||||
|
|||||||
Loading…
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Reference in New Issue
Block a user