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* 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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NEWS
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NEWS
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# -*- rdoc -*-
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# -*- markdown -*- markup: Markdown
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= NEWS for Ruby 2.6.0
|
||||
# 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/$FEATURE_OR_BUG_NUMBER</tt>)
|
||||
Note that each entry is kept so brief that no reason behind or reference
|
||||
information is supplied with. For a full list of changes with all
|
||||
sufficient information, see the ChangeLog file or Redmine
|
||||
(e.g. `https://bugs.ruby-lang.org/issues/$FEATURE_OR_BUG_NUMBER`)
|
||||
|
||||
== Changes since the 2.5.0 release
|
||||
## Changes since the 2.5.0 release
|
||||
|
||||
=== Language changes
|
||||
### Language changes
|
||||
|
||||
* $SAFE is a process global state and we can set 0 again. [Feature #14250]
|
||||
* `$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]
|
||||
* 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]
|
||||
* An endless range is introduced. You can write a range that has no end,
|
||||
like `(0..)`. The following shows typical use cases. [Feature #12912]
|
||||
|
||||
```ruby
|
||||
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) { }
|
||||
```
|
||||
|
||||
* Non-Symbol key in keyword arguments hash causes an exception.
|
||||
* Non-`Symbol` key in keyword arguments hash causes an exception.
|
||||
|
||||
=== Core classes updates (outstanding ones only)
|
||||
### Core classes updates (outstanding ones only)
|
||||
|
||||
* Array
|
||||
* `Array`
|
||||
|
||||
* Aliased methods:
|
||||
* Aliased methods:
|
||||
|
||||
* Array#filter is a new alias for Array#select [Feature #13784]
|
||||
* Array#filter! is a new alias for Array#select! [Feature #13784]
|
||||
* `Array#filter` is a new alias for `Array#select`.
|
||||
[Feature #13784]
|
||||
* `Array#filter!` is a new alias for `Array#select!`.
|
||||
[Feature #13784]
|
||||
|
||||
* Binding
|
||||
* `Binding`
|
||||
|
||||
* New methods:
|
||||
* New methods:
|
||||
|
||||
* added Binding#source_location. [Feature #14230]
|
||||
* 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`.
|
||||
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
|
||||
* `Dir`
|
||||
|
||||
* New methods:
|
||||
* New methods:
|
||||
|
||||
* added Dir#each_child and Dir#children instance methods. [Feature #13969]
|
||||
* added `Dir#each_child` and `Dir#children` instance methods.
|
||||
[Feature #13969]
|
||||
|
||||
* Enumerable
|
||||
* `Enumerable`
|
||||
|
||||
* Aliased methods:
|
||||
* Aliased methods:
|
||||
|
||||
* Enumerable#filter is a new alias for Enumerable#select [Feature #13784]
|
||||
* `Enumerable#filter` is a new alias for `Enumerable#select`.
|
||||
[Feature #13784]
|
||||
|
||||
* Enumerator::Lazy
|
||||
* `Enumerator::Lazy`
|
||||
|
||||
* Aliased methods:
|
||||
* Aliased methods:
|
||||
|
||||
* Enumerator::Lazy#filter is a new alias for Enumerator::Lazy#select [Feature #13784]
|
||||
* `Enumerator::Lazy#filter` is a new alias for
|
||||
`Enumerator::Lazy#select`. [Feature #13784]
|
||||
|
||||
* Exception
|
||||
* `Exception`
|
||||
|
||||
* Exception#full_message takes :highlight and :order options [Bug #14324]
|
||||
* `Exception#full_message` takes `:highlight` and `:order` options.
|
||||
[Bug #14324]
|
||||
|
||||
* Hash
|
||||
* `Hash`
|
||||
|
||||
* Aliased methods:
|
||||
* Aliased methods:
|
||||
|
||||
* Hash#filter is a new alias for Hash#select [Feature #13784]
|
||||
* Hash#filter! is a new alias for Hash#select! [Feature #13784]
|
||||
* `Hash#filter` is a new alias for `Hash#select`. [Feature #13784]
|
||||
* `Hash#filter!` is a new alias for `Hash#select!`.
|
||||
[Feature #13784]
|
||||
|
||||
* IO
|
||||
* `IO`
|
||||
|
||||
* new mode character 'x' to open files for exclusive access [Feature #11258]
|
||||
* new mode character `'x'` to open files for exclusive access.
|
||||
[Feature #11258]
|
||||
|
||||
* Kernel
|
||||
* `Kernel`
|
||||
|
||||
* Kernel#then is a new alias for Kernel#yield_self [Feature #14594]
|
||||
* `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.#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.#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.#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.#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]
|
||||
* `Kernel.#system` takes `:exception` option to raise an exception on
|
||||
failure. [Feature #14386]
|
||||
|
||||
* incompatible changes:
|
||||
* system() and exec() do not close non-standard file descriptors
|
||||
(The default of :close_others option is changed to false by default.
|
||||
but we still set the FD_CLOEXEC flag on descriptors we create) [Misc #14907]
|
||||
* incompatible changes:
|
||||
* `system()` and `exec()` do not close non-standard file descriptors
|
||||
(The default of `:close_others` option is changed to false by
|
||||
default. but we still set the `FD_CLOEXEC` flag on descriptors we
|
||||
create). [Misc #14907]
|
||||
|
||||
* KeyError
|
||||
* `KeyError`
|
||||
|
||||
* KeyError#initialize accepts :receiver and :key options to set receiver and key in Ruby code. [Feature #14313]
|
||||
* `KeyError#initialize` accepts `:receiver` and `:key` options to set
|
||||
receiver and key in Ruby code. [Feature #14313]
|
||||
|
||||
* Module
|
||||
* `Module`
|
||||
|
||||
* 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]
|
||||
* `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]
|
||||
|
||||
* NameError
|
||||
* `NameError`
|
||||
|
||||
* NameError#initialize accepts :receiver option to set receiver in Ruby code. [Feature #14313]
|
||||
* `NameError#initialize` accepts `:receiver` option to set receiver in
|
||||
Ruby code. [Feature #14313]
|
||||
|
||||
* NoMethodError
|
||||
* `NoMethodError`
|
||||
|
||||
* NoMethodError#initialize accepts :receiver option to set receiver in Ruby code. [Feature #14313]
|
||||
* `NoMethodError#initialize` accepts `:receiver` option to set receiver
|
||||
in Ruby code. [Feature #14313]
|
||||
|
||||
* Proc
|
||||
* `Proc`
|
||||
|
||||
* Proc#call doesn't change $SAFE any more. [Feature #14250]
|
||||
* `Proc#call` doesn't change `$SAFE` any more. [Feature #14250]
|
||||
|
||||
* Random
|
||||
* `Random`
|
||||
|
||||
* New methods:
|
||||
* New methods:
|
||||
|
||||
* added Random.bytes. [Feature #4938]
|
||||
* added `Random.bytes`. [Feature #4938]
|
||||
|
||||
* Range
|
||||
* `Range`
|
||||
|
||||
* Range#=== now uses #cover? instead of #include? method. [Feature #14575]
|
||||
* `Range#===` now uses `#cover?` instead of `#include?` method.
|
||||
[Feature #14575]
|
||||
|
||||
* RubyVM::AST
|
||||
* `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]
|
||||
* `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`
|
||||
|
||||
* String#split yields each substring to the block if given. [Feature #4780]
|
||||
* `String#split` yields each substring to the block if given.
|
||||
[Feature #4780]
|
||||
|
||||
* TracePoint
|
||||
* `TracePoint`
|
||||
|
||||
* New methods:
|
||||
* New methods:
|
||||
|
||||
* TracePoint#parameters [Feature #14694]
|
||||
* `TracePoint#parameters` [Feature #14694]
|
||||
|
||||
=== Stdlib updates (outstanding ones only)
|
||||
### Stdlib updates (outstanding ones only)
|
||||
|
||||
* ERB
|
||||
* `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]
|
||||
* 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.
|
||||
* erb command's `-S` option is deprecated, which will be removed in the
|
||||
next version.
|
||||
|
||||
* FileUtils
|
||||
* `FileUtils`
|
||||
|
||||
* New method:
|
||||
* New method:
|
||||
|
||||
* FileUtils#cp_lr [Feature #4189]
|
||||
* `FileUtils#cp_lr`. [Feature #4189]
|
||||
|
||||
* Matrix
|
||||
* `Matrix`
|
||||
|
||||
* New method:
|
||||
* New method:
|
||||
|
||||
* Matrix#antisymmetric?
|
||||
* `Matrix#antisymmetric?`
|
||||
|
||||
* Net
|
||||
* `Net`
|
||||
|
||||
* New method:
|
||||
* New method:
|
||||
|
||||
* Add write_timeout keyword argument to Net::BufferedIO.new. [Feature #13396]
|
||||
* 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]
|
||||
* Add `Net::BufferedIO#write_timeout`,
|
||||
`Net::BufferedIO#write_timeout=`, `Net::HTTP#write_timeout`, and
|
||||
`Net::HTTP#write_timeout=`. [Feature #13396]
|
||||
|
||||
* New constant:
|
||||
* New constant:
|
||||
|
||||
* Add Net::HTTPClientException to deprecate Net::HTTPServerException,
|
||||
whose name is misleading. [Bug #14688]
|
||||
* Add `Net::HTTPClientException` to deprecate
|
||||
`Net::HTTPServerException`, whose name is misleading. [Bug #14688]
|
||||
|
||||
* REXML
|
||||
* `REXML`
|
||||
|
||||
* Improved some XPath implementations:
|
||||
* Improved some XPath implementations:
|
||||
|
||||
* concat() function: Stringify all arguments before concatenating
|
||||
* `concat()` function: Stringify all arguments before concatenating
|
||||
|
||||
* string() function: Support context node
|
||||
* `string()` function: Support context node
|
||||
|
||||
* string() function: Support processing instruction node
|
||||
* `string()` function: Support processing instruction node
|
||||
|
||||
* Support "*:#{ELEMENT_NAME}" syntax in XPath 2.0
|
||||
* Support `"*:#{ELEMENT_NAME}"` syntax in XPath 2.0
|
||||
|
||||
* Fixed some XPath implementations:
|
||||
* Fixed some XPath implementations:
|
||||
|
||||
* "//#{ELEMENT_NAME}[#{POSITION}]" case
|
||||
* `"//#{ELEMENT_NAME}[#{POSITION}]"` case
|
||||
|
||||
* string() function: Fix function(document) returns nodes that are
|
||||
out of root elements.
|
||||
* `string()` function: Fix `function(document)` returns nodes that
|
||||
are out of root elements.
|
||||
|
||||
* "/ #{ELEMENT_NAME} " case
|
||||
* `"/ #{ELEMENT_NAME} "` case
|
||||
|
||||
* "/ #{ELEMENT_NAME} [ #{PREDICATE} ]" case
|
||||
* `"/ #{ELEMENT_NAME} [ #{PREDICATE} ]"` case
|
||||
|
||||
* "/ #{AXIS}:: #{ELEMENT_NAME} " case
|
||||
* `"/ #{AXIS}:: #{ELEMENT_NAME} "` case
|
||||
|
||||
* "#{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,
|
||||
:ignore_unknown_element, :parser_class options are available.
|
||||
* `RSS::Parser.parse`: Accept options as `Hash`. `:validate`,
|
||||
`: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,
|
||||
and File.readlines do not invoke external commands even if the path
|
||||
starts with the pipe character |. [Feature #14245]
|
||||
* `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`
|
||||
|
||||
* Dir.glob with '\0'-separated pattern list will be deprecated, and
|
||||
is now warned. [Feature #14643]
|
||||
* `Dir.glob` with `'\0'`-separated pattern list will be deprecated, and
|
||||
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 `$SAFE` any more. [Feature #14318]
|
||||
With `lc_fizzbuzz` benchmark which uses so many `Proc#call` we can measure
|
||||
x1.4 improvements [Bug #10212].
|
||||
* Speedup `Proc#call` because we don't need to care about `$SAFE` any more.
|
||||
[Feature #14318]
|
||||
|
||||
* 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.
|
||||
With `lc_fizzbuzz` benchmark which uses so many `Proc#call` we can
|
||||
measure x1.4 improvements. [Bug #10212]
|
||||
|
||||
* 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.
|
||||
* Speedup `block.call` where `block` is passed block parameter.
|
||||
[Feature #14330]
|
||||
|
||||
* 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
|
||||
(for `Thread.new` and `Thread.start`) [Feature #14757]
|
||||
Additionally, Ruby 2.6 improves the performance of passed block calling.
|
||||
|
||||
=== 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.
|
||||
This eliminates the burden of each teeny upgrade on the platform that users need to rebuild every extension library.
|
||||
* 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
|
||||
|
|
|
|||
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