February 2025 - ruby-core - ml.ruby-lang.org

[ruby-core:120992] [Ruby master Feature#21135] Feature request: Enumerable.compare_count
by Student (Nathan Zook) 17 Feb '25

17 Feb '25

Issue #21135 has been reported by Student (Nathan Zook). ---------------------------------------- Feature #21135: Feature request: Enumerable.compare_count https://bugs.ruby-lang.org/issues/21135 * Author: Student (Nathan Zook) * Status: Open ---------------------------------------- Enumerables at times can be quite expensive to complete expand. If all is desired is to compare the count, we can terminate the enumeration once the result is known. The functionality that I envision, if implemented in ruby, might look like this: ```ruby module Enumerable def compare_count(operation, standard, &blk) case operation when :< compare_count_lt(standard, &blk) when :>= !compare_count_lt(standard, &blk) when :> compare_count_spaceship(standard, &blk) == 1 when :<= compare_count_spaceship(standard, &blk) != 1 when :== compare_count_spaceship(standard, &blk) == 0 when :!= compare_count_spaceship(standard, &blk) != 0 end end def compare_count_lt(standard, &blk) truncate_count(standard - 1, &blk) < standard end def compare_count_spaceship(standard, &blk) truncate_count(standard, &blk) <=> standard end def truncate_count(limit, &blk) return 0 if limit < 0 found = 0 each do |ele| found += 1 unless blk && !yield(ele) break if found > limit end found end end class Demo include Enumerable attr_reader :capacity attr_reader :cnt def initialize(capacity) @capacity = capacity end def each @cnt = 0 while cnt < capacity @cnt += 1 yield cnt end end end %i{< <= >= > == !=}.each do |op| d = Demo.new(3) (-1..5).each do |x| puts [op, x, d.compare_count(op, x), d].inspect end end require 'prime' %i{< <= >= > == !=}.each do |op| d = Demo.new(6) (-1..5).each do |x| puts [op, x, d.compare_count(op, x){|p| Prime.prime?(p)} , d].inspect end end ``` ``` [:<, -1, false, #<Demo:0x034d567c @capacity=3>] [:<, 0, false, #<Demo:0x034d567c @capacity=3>] [:<, 1, false, #<Demo:0x034d567c @capacity=3, @cnt=1>] [:<, 2, false, #<Demo:0x034d567c @capacity=3, @cnt=2>] [:<, 3, false, #<Demo:0x034d567c @capacity=3, @cnt=3>] [:<, 4, true, #<Demo:0x034d567c @capacity=3, @cnt=3>] [:<, 5, true, #<Demo:0x034d567c @capacity=3, @cnt=3>] [:<=, -1, false, #<Demo:0x034d512c @capacity=3>] [:<=, 0, false, #<Demo:0x034d512c @capacity=3, @cnt=1>] [:<=, 1, false, #<Demo:0x034d512c @capacity=3, @cnt=2>] [:<=, 2, false, #<Demo:0x034d512c @capacity=3, @cnt=3>] [:<=, 3, true, #<Demo:0x034d512c @capacity=3, @cnt=3>] [:<=, 4, true, #<Demo:0x034d512c @capacity=3, @cnt=3>] [:<=, 5, true, #<Demo:0x034d512c @capacity=3, @cnt=3>] [:>=, -1, true, #<Demo:0x034d4d44 @capacity=3>] [:>=, 0, true, #<Demo:0x034d4d44 @capacity=3>] [:>=, 1, true, #<Demo:0x034d4d44 @capacity=3, @cnt=1>] [:>=, 2, true, #<Demo:0x034d4d44 @capacity=3, @cnt=2>] [:>=, 3, true, #<Demo:0x034d4d44 @capacity=3, @cnt=3>] [:>=, 4, false, #<Demo:0x034d4d44 @capacity=3, @cnt=3>] [:>=, 5, false, #<Demo:0x034d4d44 @capacity=3, @cnt=3>] [:>, -1, true, #<Demo:0x034d4998 @capacity=3>] [:>, 0, true, #<Demo:0x034d4998 @capacity=3, @cnt=1>] [:>, 1, true, #<Demo:0x034d4998 @capacity=3, @cnt=2>] [:>, 2, true, #<Demo:0x034d4998 @capacity=3, @cnt=3>] [:>, 3, false, #<Demo:0x034d4998 @capacity=3, @cnt=3>] [:>, 4, false, #<Demo:0x034d4998 @capacity=3, @cnt=3>] [:>, 5, false, #<Demo:0x034d4998 @capacity=3, @cnt=3>] [:==, -1, false, #<Demo:0x034d4600 @capacity=3>] [:==, 0, false, #<Demo:0x034d4600 @capacity=3, @cnt=1>] [:==, 1, false, #<Demo:0x034d4600 @capacity=3, @cnt=2>] [:==, 2, false, #<Demo:0x034d4600 @capacity=3, @cnt=3>] [:==, 3, true, #<Demo:0x034d4600 @capacity=3, @cnt=3>] [:==, 4, false, #<Demo:0x034d4600 @capacity=3, @cnt=3>] [:==, 5, false, #<Demo:0x034d4600 @capacity=3, @cnt=3>] [:!=, -1, true, #<Demo:0x034d4268 @capacity=3>] [:!=, 0, true, #<Demo:0x034d4268 @capacity=3, @cnt=1>] [:!=, 1, true, #<Demo:0x034d4268 @capacity=3, @cnt=2>] [:!=, 2, true, #<Demo:0x034d4268 @capacity=3, @cnt=3>] [:!=, 3, false, #<Demo:0x034d4268 @capacity=3, @cnt=3>] [:!=, 4, true, #<Demo:0x034d4268 @capacity=3, @cnt=3>] [:!=, 5, true, #<Demo:0x034d4268 @capacity=3, @cnt=3>] [:<, -1, false, #<Demo:0x00007f64147c37e0 @capacity=6>] [:<, 0, false, #<Demo:0x00007f64147c37e0 @capacity=6>] [:<, 1, false, #<Demo:0x00007f64147c37e0 @capacity=6, @cnt=2>] [:<, 2, false, #<Demo:0x00007f64147c37e0 @capacity=6, @cnt=3>] [:<, 3, false, #<Demo:0x00007f64147c37e0 @capacity=6, @cnt=5>] [:<, 4, true, #<Demo:0x00007f64147c37e0 @capacity=6, @cnt=6>] [:<, 5, true, #<Demo:0x00007f64147c37e0 @capacity=6, @cnt=6>] [:<=, -1, false, #<Demo:0x00007f64147c21d8 @capacity=6>] [:<=, 0, false, #<Demo:0x00007f64147c21d8 @capacity=6, @cnt=2>] [:<=, 1, false, #<Demo:0x00007f64147c21d8 @capacity=6, @cnt=3>] [:<=, 2, false, #<Demo:0x00007f64147c21d8 @capacity=6, @cnt=5>] [:<=, 3, true, #<Demo:0x00007f64147c21d8 @capacity=6, @cnt=6>] [:<=, 4, true, #<Demo:0x00007f64147c21d8 @capacity=6, @cnt=6>] [:<=, 5, true, #<Demo:0x00007f64147c21d8 @capacity=6, @cnt=6>] [:>=, -1, true, #<Demo:0x00007f64147c0860 @capacity=6>] [:>=, 0, true, #<Demo:0x00007f64147c0860 @capacity=6>] [:>=, 1, true, #<Demo:0x00007f64147c0860 @capacity=6, @cnt=2>] [:>=, 2, true, #<Demo:0x00007f64147c0860 @capacity=6, @cnt=3>] [:>=, 3, true, #<Demo:0x00007f64147c0860 @capacity=6, @cnt=5>] [:>=, 4, false, #<Demo:0x00007f64147c0860 @capacity=6, @cnt=6>] [:>=, 5, false, #<Demo:0x00007f64147c0860 @capacity=6, @cnt=6>] [:>, -1, true, #<Demo:0x00007f64147df260 @capacity=6>] [:>, 0, true, #<Demo:0x00007f64147df260 @capacity=6, @cnt=2>] [:>, 1, true, #<Demo:0x00007f64147df260 @capacity=6, @cnt=3>] [:>, 2, true, #<Demo:0x00007f64147df260 @capacity=6, @cnt=5>] [:>, 3, false, #<Demo:0x00007f64147df260 @capacity=6, @cnt=6>] [:>, 4, false, #<Demo:0x00007f64147df260 @capacity=6, @cnt=6>] [:>, 5, false, #<Demo:0x00007f64147df260 @capacity=6, @cnt=6>] [:==, -1, false, #<Demo:0x00007f64147dd898 @capacity=6>] [:==, 0, false, #<Demo:0x00007f64147dd898 @capacity=6, @cnt=2>] [:==, 1, false, #<Demo:0x00007f64147dd898 @capacity=6, @cnt=3>] [:==, 2, false, #<Demo:0x00007f64147dd898 @capacity=6, @cnt=5>] [:==, 3, true, #<Demo:0x00007f64147dd898 @capacity=6, @cnt=6>] [:==, 4, false, #<Demo:0x00007f64147dd898 @capacity=6, @cnt=6>] [:==, 5, false, #<Demo:0x00007f64147dd898 @capacity=6, @cnt=6>] [:!=, -1, true, #<Demo:0x00007f64147dbf20 @capacity=6>] [:!=, 0, true, #<Demo:0x00007f64147dbf20 @capacity=6, @cnt=2>] [:!=, 1, true, #<Demo:0x00007f64147dbf20 @capacity=6, @cnt=3>] [:!=, 2, true, #<Demo:0x00007f64147dbf20 @capacity=6, @cnt=5>] [:!=, 3, false, #<Demo:0x00007f64147dbf20 @capacity=6, @cnt=6>] [:!=, 4, true, #<Demo:0x00007f64147dbf20 @capacity=6, @cnt=6>] [:!=, 5, true, #<Demo:0x00007f64147dbf20 @capacity=6, @cnt=6>] ``` -- https://bugs.ruby-lang.org/

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[ruby-core:121072] [Ruby master Feature#16993] Sets: from hash keys using Hash#key_set
by greggzst (Grzegorz Jakubiak) 15 Feb '25

15 Feb '25

Issue #16993 has been updated by greggzst (Grzegorz Jakubiak). nobu (Nobuyoshi Nakada) wrote in #note-5: > This kind of extensions should be done in the corresponding library side, set.rb. Thanks for pointing that out. Here's the PR https://github.com/ruby/set/pull/40 Dan0042 (Daniel DeLorme) wrote in #note-6: > I like the concept but I'm going to bikeshed the naming: by itself "key_set" is unclear if you don't already know what it does. It sounds like the purpose is to set a key (like instance_variable_set). I'd prefer something a bit more descriptive like "keys_to_set" Good point I addressed that ---------------------------------------- Feature #16993: Sets: from hash keys using Hash#key_set https://bugs.ruby-lang.org/issues/16993#change-111989 * Author: marcandre (Marc-Andre Lafortune) * Status: Open ---------------------------------------- To create a set from hash keys currently implies a temporary array for all keys, rehashing all those keys and rebuilding a hash. Instead, the hash could be copied and its values set to `true`. ```ruby h = {a: 1} # Now: Set.new(h.keys) # => Set[:a] # After h.key_set # => Set[:a], efficiently. ``` -- https://bugs.ruby-lang.org/

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[ruby-core:121068] [Ruby master Feature#16993] Sets: from hash keys using Hash#key_set
by Dan0042 (Daniel DeLorme) 15 Feb '25

15 Feb '25

Issue #16993 has been updated by Dan0042 (Daniel DeLorme). I like the concept but I'm going to bikeshed the naming: by itself "key_set" is unclear if you don't already know what it does. It sounds like the purpose is to set a key (like instance_variable_set). I'd prefer something a bit more descriptive like "keys_to_set" ---------------------------------------- Feature #16993: Sets: from hash keys using Hash#key_set https://bugs.ruby-lang.org/issues/16993#change-111984 * Author: marcandre (Marc-Andre Lafortune) * Status: Open ---------------------------------------- To create a set from hash keys currently implies a temporary array for all keys, rehashing all those keys and rebuilding a hash. Instead, the hash could be copied and its values set to `true`. ```ruby h = {a: 1} # Now: Set.new(h.keys) # => Set[:a] # After h.key_set # => Set[:a], efficiently. ``` -- https://bugs.ruby-lang.org/

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[ruby-core:121071] Your private information has been stolen because of suspicious events.
by ruby-core＠ruby-lang.org 15 Feb '25

15 Feb '25

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1 0

[ruby-core:121065] [Ruby master Feature#16993] Sets: from hash keys using Hash#key_set
by nobu (Nobuyoshi Nakada) 15 Feb '25

15 Feb '25

Issue #16993 has been updated by nobu (Nobuyoshi Nakada). This kind of extensions should be done in the corresponding library side, set.rb. ---------------------------------------- Feature #16993: Sets: from hash keys using Hash#key_set https://bugs.ruby-lang.org/issues/16993#change-111978 * Author: marcandre (Marc-Andre Lafortune) * Status: Open ---------------------------------------- To create a set from hash keys currently implies a temporary array for all keys, rehashing all those keys and rebuilding a hash. Instead, the hash could be copied and its values set to `true`. ```ruby h = {a: 1} # Now: Set.new(h.keys) # => Set[:a] # After h.key_set # => Set[:a], efficiently. ``` -- https://bugs.ruby-lang.org/

1 0

[ruby-core:121041] [Ruby master Bug#21137] Compound assignment operator with "it" parsed differently between parse.y and prism
by kinoppyd (Yasuhiro Kinoshita) 14 Feb '25

14 Feb '25

Issue #21137 has been reported by kinoppyd (Yasuhiro Kinoshita). ---------------------------------------- Bug #21137: Compound assignment operator with "it" parsed differently between parse.y and prism https://bugs.ruby-lang.org/issues/21137 * Author: kinoppyd (Yasuhiro Kinoshita) * Status: Open * ruby -v: ruby 3.4.1 (2024-12-25 revision 48d4efcb85) +PRISM [arm64-darwin21] * Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN ---------------------------------------- ``` ruby # parse.y OK: no error # prism OK: no error proc { it = 1 } # parse.y OK: no error # prism OK: no error proc { it = it + 1 } # parse.y OK: no error # prism NG: syntax errors found (SyntaxError) proc { it += 1 } ``` -- https://bugs.ruby-lang.org/

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[ruby-core:120712] [Ruby master Bug#21043] Prism defined? has slight deviations from parse.y
by kddnewton (Kevin Newton) 14 Feb '25

14 Feb '25

Issue #21043 has been reported by kddnewton (Kevin Newton). ---------------------------------------- Bug #21043: Prism defined? has slight deviations from parse.y https://bugs.ruby-lang.org/issues/21043 * Author: kddnewton (Kevin Newton) * Status: Open * Assignee: prism * Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: REQUIRED ---------------------------------------- ```ruby defined?((alias foo bar)) defined?((undef foo)) def foo(*) = defined?(foo(*)) def foo(**) = defined?(foo(**)) def foo(...) = defined?(foo(...)) def foo(&) = defined?(foo(&)) ``` and a couple others have slightly different behavior. -- https://bugs.ruby-lang.org/

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[ruby-core:120896] [Ruby master Bug#21118] Calling defined?(it) segfaults
by radarek 14 Feb '25

14 Feb '25

Issue #21118 has been reported by radarek (Radosław Bułat). ---------------------------------------- Bug #21118: Calling defined?(it) segfaults https://bugs.ruby-lang.org/issues/21118 * Author: radarek (Radosław Bułat) * Status: Open * ruby -v: ruby 3.4.1 (2024-12-25 revision 48d4efcb85) +PRISM [arm64-darwin24] * Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN ---------------------------------------- ``` $ ruby -e '[1, 2, 3].each { p defined?(it) }' -e: [BUG] Unsupported node PM_IT_LOCAL_VARIABLE_READ_NODE ruby 3.4.1 (2024-12-25 revision 48d4efcb85) +PRISM [arm64-darwin24] -- Crash Report log information -------------------------------------------- See Crash Report log file in one of the following locations: * ~/Library/Logs/DiagnosticReports * /Library/Logs/DiagnosticReports for more details. Don't forget to include the above Crash Report log file in bug reports. -- Control frame information ----------------------------------------------- c:0001 p:0000 s:0003 E:0015d0 DUMMY [FINISH] -- Threading information --------------------------------------------------- Total ractor count: 1 Ruby thread count for this ractor: 1 -- C level backtrace information ------------------------------------------- /Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib(rb_vm_bugreport+0xb6c) [0x1011f22dc] /Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib(rb_bug_without_die_internal+0xfc) [0x101029680] /Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib(rb_bug+0x1c) [0x10133c298] /Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib(pm_compile_defined_expr0.cold.2+0x0) [0x10133c054] /Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib(pm_compile_defined_expr0+0xcd8) [0x100ff95bc] /Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib(pm_compile_defined_expr+0x174) [0x100fe40e0] /Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib(pm_compile_node+0x23fc) [0x100fb6a20] /Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib(pm_setup_args_core+0x490) [0x100ff6c0c] /Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib(pm_setup_args+0x264) [0x100ff66d0] /Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib(pm_compile_call+0x4a8) [0x100ff5db0] /Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib(pm_compile_scope_node+0x321c) [0x100ff2d20] /Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib(pm_iseq_compile_node+0x120) [0x100fb45f4] /Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib(pm_iseq_new_with_opt_try+0x1c) [0x10108bf6c] /Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib(rb_protect+0xbc) [0x101035620] /Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib(pm_iseq_new_with_opt+0x148) [0x10108b3d8] /Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib(pm_compile_call+0x5b4) [0x100ff5ebc] /Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib(pm_compile_scope_node+0x1c70) [0x100ff1774] /Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib(pm_iseq_compile_node+0x84) [0x100fb4558] /Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib(pm_iseq_new_with_opt_try+0x1c) [0x10108bf6c] /Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib(rb_protect+0xbc) [0x101035620] /Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib(pm_iseq_new_with_opt+0x148) [0x10108b3d8] /Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib(pm_iseq_new_main+0xc4) [0x10108b5e0] /Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib(ruby_process_options+0x176c) [0x101147e70] /Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib(ruby_options+0xb0) [0x101034058] /Users/radarek/.rbenv/versions/3.4.1/bin/ruby(main+0x64) [0x1004c3f20] -- Other runtime information ----------------------------------------------- * Loaded script: -e * Loaded features: 0 enumerator.so 1 thread.rb 2 fiber.so 3 rational.so 4 complex.so 5 ruby2_keywords.rb 6 /Users/radarek/.rbenv/versions/3.4.1/lib/ruby/3.4.0/arm64-darwin24/enc/encdb.bundle 7 /Users/radarek/.rbenv/versions/3.4.1/lib/ruby/3.4.0/arm64-darwin24/enc/trans/transdb.bundle 8 /Users/radarek/.rbenv/versions/3.4.1/lib/ruby/3.4.0/arm64-darwin24/rbconfig.rb 9 /Users/radarek/.rbenv/versions/3.4.1/lib/ruby/3.4.0/rubygems/compatibility.rb 10 /Users/radarek/.rbenv/versions/3.4.1/lib/ruby/3.4.0/rubygems/defaults.rb 11 /Users/radarek/.rbenv/versions/3.4.1/lib/ruby/3.4.0/rubygems/deprecate.rb 12 /Users/radarek/.rbenv/versions/3.4.1/lib/ruby/3.4.0/rubygems/errors.rb 13 /Users/radarek/.rbenv/versions/3.4.1/lib/ruby/3.4.0/rubygems/target_rbconfig.rb 14 /Users/radarek/.rbenv/versions/3.4.1/lib/ruby/3.4.0/rubygems/unknown_command_spell_checker.rb 15 /Users/radarek/.rbenv/versions/3.4.1/lib/ruby/3.4.0/rubygems/exceptions.rb 16 /Users/radarek/.rbenv/versions/3.4.1/lib/ruby/3.4.0/rubygems/basic_specification.rb 17 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/Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib 11bd34000-11bd38000 --- /Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib 11bd38000-11bddc000 rw- /Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib 11bddc000-11bde0000 --- /Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib 11bde0000-11be84000 rw- /Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib 11be84000-11be88000 --- /Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib 11be88000-11bf2c000 rw- /Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib 11bf2c000-11c5d0000 r-- /Users/radarek/.rbenv/versions/3.4.1/lib/libruby.3.4.dylib 15ae00000-15af00000 rw- 15af00000-15b000000 rw- 15b000000-15b800000 rw- 15b800000-15c000000 rw- 160000000-168000000 rw- 16b940000-16f144000 --- 16f144000-16f940000 rw- 16f940000-16f944000 --- 16f944000-16f9cc000 rw- 180000000-200000000 r-- 200000000-200160000 r-- 200160000-200180000 rw- 200180000-200184000 r-- 200184000-202000000 rw- 202000000-202304000 r-- 202304000-20234c000 r-- 20234c000-2034b4000 rw- 2034b4000-20ac98000 r-- 20ac98000-20c000000 r-- 20c000000-28e000000 r-- 28e000000-290000000 rw- 290000000-290910000 r-- 290910000-291684000 rw- 291684000-295d30000 r-- 295d30000-296000000 r-- 296000000-300000000 r-- fc0000000-1000000000 --- 1000000000-7000000000 --- 600000000000-600020000000 rw- [IMPORTANT] Don't forget to include the Crash Report log file under DiagnosticReports directory in bug reports. ``` -- https://bugs.ruby-lang.org/

4 4

[ruby-core:120628] [Ruby master Bug#21031] Incompatibility with prism and parse.y when eval'ing unnamed forwarding variables
by ksss (Yuki Kurihara) 14 Feb '25

14 Feb '25

Issue #21031 has been reported by ksss (Yuki Kurihara). ---------------------------------------- Bug #21031: Incompatibility with prism and parse.y when eval'ing unnamed forwarding variables https://bugs.ruby-lang.org/issues/21031 * Author: ksss (Yuki Kurihara) * Status: Open * ruby -v: ruby 3.5.0dev (2025-01-13T03:12:28Z master 384e6945ac) +PRISM [arm64-darwin23] * Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN, 3.4: UNKNOWN ---------------------------------------- ## Case 1 ```rb # t.rb def foo(*) eval("p(*)") end foo(1) ``` ``` $ ruby --parser=prism t.rb t.rb:4:in 'Kernel#eval': (eval at t.rb:4):1: syntax error found (SyntaxError) > 1 | p(*) | ^ unexpected `*`; no anonymous rest parameter from t.rb:4:in 'Object#foo' from t.rb:7:in '<main>' ``` ``` $ ruby --parser=parse.y t.rb 1 ``` ## Case 2 ```rb # t.rb def foo(**) eval("p(**)") end foo(a: 1) ``` ``` $ ruby --parser=prism t.rb t.rb:4:in 'Kernel#eval': (eval at t.rb:4):1: syntax error found (SyntaxError) > 1 | p(**) | ^~ unexpected `**`; no anonymous keyword rest parameter from t.rb:4:in 'Object#foo' from t.rb:7:in '<main>' ``` ``` $ ruby --parser=parse.y t.rb {a: 1} ``` ## Case 3 ```rb # t.rb def foo(&) eval("p(&)") end foo{} ``` ``` $ ruby --parser=prism t.rb t.rb:4:in 'Kernel#eval': (eval at t.rb:4):1: syntax error found (SyntaxError) > 1 | p(&) | ^ unexpected `&`; no anonymous block parameter from t.rb:4:in 'Object#foo' from t.rb:7:in '<main>' ``` ``` $ ruby --parser=parse.y t.rb ``` ## Case 4 ```rb # t.rb def foo(...) eval("p(...)") end foo(1, 2, 3) ``` ``` $ ruby --parser=prism t.rb t.rb:4:in 'Kernel#eval': (eval at t.rb:4):1: syntax error found (SyntaxError) > 1 | p(...) | ^~~ unexpected ... when the parent method is not forwarding from t.rb:4:in 'Object#foo' from t.rb:7:in '<main>' ``` ``` $ ruby --parser=parse.y t.rb 1 2 3 ``` I expect to the parse.y behavior. -- https://bugs.ruby-lang.org/

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[ruby-core:121050] [Ruby master Feature#16993] Sets: from hash keys using Hash#key_set
by greggzst (Grzegorz Jakubiak) 14 Feb '25

14 Feb '25

Issue #16993 has been updated by greggzst (Grzegorz Jakubiak). I opened a PR to add this functionality https://github.com/ruby/ruby/pull/12750 ---------------------------------------- Feature #16993: Sets: from hash keys using Hash#key_set https://bugs.ruby-lang.org/issues/16993#change-111962 * Author: marcandre (Marc-Andre Lafortune) * Status: Open ---------------------------------------- To create a set from hash keys currently implies a temporary array for all keys, rehashing all those keys and rebuilding a hash. Instead, the hash could be copied and its values set to `true`. ```ruby h = {a: 1} # Now: Set.new(h.keys) # => Set[:a] # After h.key_set # => Set[:a], efficiently. ``` -- https://bugs.ruby-lang.org/

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