1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
# NEWS for Ruby 3.4.0
This document is a list of user-visible feature changes
since the **3.3.0** release, except for bug fixes.
Note that each entry is kept to a minimum, see links for details.
## Language changes
* String literals in files without a `frozen_string_literal` comment now emit a deprecation warning
when they are mutated.
These warnings can be enabled with `-W:deprecated` or by setting `Warning[:deprecated] = true`.
To disable this change, you can run Ruby with the `--disable-frozen-string-literal`
command line argument. [[Feature #20205]]
* `it` is added to reference a block parameter. [[Feature #18980]]
* Keyword splatting `nil` when calling methods is now supported.
`**nil` is treated similarly to `**{}`, passing no keywords,
and not calling any conversion methods. [[Bug #20064]]
* Block passing is no longer allowed in index assignment
(e.g. `a[0, &b] = 1`). [[Bug #19918]]
* Keyword arguments are no longer allowed in index assignment
(e.g. `a[0, kw: 1] = 2`). [[Bug #20218]]
* `GC.config` added to allow setting configuration variables on the Garbage
Collector. [[Feature #20443]]
* GC configuration parameter `rgengc_allow_full_mark` introduced. When `false`
GC will only mark young objects. Default is `true`. [[Feature #20443]]
## Core classes updates
Note: We're only listing outstanding class updates.
* Exception
* Exception#set_backtrace now accepts arrays of `Thread::Backtrace::Location`.
`Kernel#raise`, `Thread#raise` and `Fiber#raise` also accept this new format. [[Feature #13557]]
* Range
* Range#size now raises TypeError if the range is not iterable. [[Misc #18984]]
* Range#step now consistently has a semantics of iterating by using `+` operator
for all types, not only numerics. [[Feature #18368]]
```ruby
(Time.utc(2022, 2, 24)..).step(24*60*60).take(3)
#=> [2022-02-24 00:00:00 UTC, 2022-02-25 00:00:00 UTC, 2022-02-26 00:00:00 UTC]
```
* RubyVM::AbstractSyntaxTree
* Add `RubyVM::AbstractSyntaxTree::Node#locations` method which returns location objects
associated with the AST node. [[Feature #20624]]
* Add `RubyVM::AbstractSyntaxTree::Location` class which holds location information. [[Feature #20624]]
## Stdlib updates
* Tempfile
* The keyword argument `anonymous: true` is implemented for `Tempfile.create`.
`Tempfile.create(anonymous: true)` removes the created temporary file immediately.
So applications don't need to remove the file.
[[Feature #20497]]
The following default gems are updated.
* RubyGems 3.6.0.dev
* bundler 2.6.0.dev
* erb 4.0.4
* fiddle 1.1.3.dev
* io-console 0.7.2
* irb 1.14.0
* json 2.7.2
* logger 1.6.1
* net-http 0.4.1
* optparse 0.5.0
* prism 1.0.0
* psych 5.2.0.beta1
* rdoc 6.7.0
* reline 0.5.10
* resolv 0.4.0
* stringio 3.1.2.dev
* strscan 3.1.1.dev
* time 0.4.0
* uri 0.13.1
* zlib 3.1.1
The following bundled gems are updated.
* minitest 5.25.1
* rake 13.2.1
* test-unit 3.6.2
* rexml 3.3.7
* rss 0.3.1
* net-ftp 0.3.7
* net-imap 0.4.16
* net-smtp 0.5.0
* rbs 3.5.3
* typeprof 0.21.11
* debug 1.9.2
* racc 1.8.1
The following bundled gems are promoted from default gems.
* mutex_m 0.2.0
* getoptlong 0.2.1
* base64 0.2.0
* bigdecimal 3.1.8
* observer 0.1.2
* abbrev 0.1.2
* resolv-replace 0.1.1
* rinda 0.2.0
* drb 2.2.1
* nkf 0.2.0
* syslog 0.1.2
* csv 3.3.0
See GitHub releases like [GitHub Releases of Logger](https://github.com/ruby/logger/releases) or changelog for details of the default gems or bundled gems.
## Supported platforms
## Compatibility issues
* Error messages and backtrace displays have been changed.
* Use a single quote instead of a backtick as a opening quote. [[Feature #16495]]
* Display a class name before a method name (only when the class has a permanent name). [[Feature #19117]]
* `Kernel#caller`, `Thread::Backtrace::Location`'s methods, etc. are also changed accordingly.
```
Old:
test.rb:1:in `foo': undefined method `time' for an instance of Integer
from test.rb:2:in `<main>'
New:
test.rb:1:in 'Object#foo': undefined method 'time' for an instance of Integer
from test.rb:2:in `<main>'
```
## Stdlib compatibility issues
## C API updates
* `rb_newobj` and `rb_newobj_of` (and corresponding macros `RB_NEWOBJ`, `RB_NEWOBJ_OF`, `NEWOBJ`, `NEWOBJ_OF`) have been removed. [[Feature #20265]]
* Removed deprecated function `rb_gc_force_recycle`. [[Feature #18290]]
## Implementation improvements
* `Array#each` is rewritten in Ruby for better performance [[Feature #20182]].
## JIT
## Miscellaneous changes
* Passing a block to a method which doesn't use the passed block will show
a warning on verbose mode (`-w`).
[[Feature #15554]]
* Redefining some core methods that are specially optimized by the interpreter
and JIT like `String.freeze` or `Integer#+` now emits a performance class
warning (`-W:performance` or `Warning[:performance] = true`).
[[Feature #20429]]
[Feature #13557]: https://bugs.ruby-lang.org/issues/13557
[Feature #15554]: https://bugs.ruby-lang.org/issues/15554
[Feature #16495]: https://bugs.ruby-lang.org/issues/16495
[Feature #18290]: https://bugs.ruby-lang.org/issues/18290
[Feature #18368]: https://bugs.ruby-lang.org/issues/18368
[Feature #18980]: https://bugs.ruby-lang.org/issues/18980
[Misc #18984]: https://bugs.ruby-lang.org/issues/18984
[Feature #19117]: https://bugs.ruby-lang.org/issues/19117
[Bug #19918]: https://bugs.ruby-lang.org/issues/19918
[Bug #20064]: https://bugs.ruby-lang.org/issues/20064
[Feature #20182]: https://bugs.ruby-lang.org/issues/20182
[Feature #20205]: https://bugs.ruby-lang.org/issues/20205
[Bug #20218]: https://bugs.ruby-lang.org/issues/20218
[Feature #20265]: https://bugs.ruby-lang.org/issues/20265
[Feature #20429]: https://bugs.ruby-lang.org/issues/20429
[Feature #20443]: https://bugs.ruby-lang.org/issues/20443
[Feature #20497]: https://bugs.ruby-lang.org/issues/20497
[Feature #20624]: https://bugs.ruby-lang.org/issues/20624
|
