[#55853] ruby 1.9.3 p448 breaks ABI — V咜 Ondruch <v.ondruch@...>

Hi,

13 messages 2013/07/08

[#55951] [ruby-trunk - Bug #8625][Open] IO#read(len, buf) shortens buf even if data is not read actually — "no6v (Nobuhiro IMAI)" <nov@...>

10 messages 2013/07/11

[#55976] [ruby-trunk - Feature #8629][Open] Method#parameters should include the default value — "rosenfeld (Rodrigo Rosenfeld Rosas)" <rr.rosas@...>

13 messages 2013/07/12

[#55985] [ruby-trunk - Feature #8631][Open] Add a new method to ERB to allow assigning the local variables from a hash — "rosenfeld (Rodrigo Rosenfeld Rosas)" <rr.rosas@...>

19 messages 2013/07/12

[#56004] [ruby-trunk - Feature #8636][Open] Documentation hosting on ruby-lang.org — "zzak (Zachary Scott)" <e@...>

18 messages 2013/07/15

[#56019] [ruby-trunk - Feature #8639][Open] Add Queue#each — "avdi (Avdi Grimm)" <avdi@...>

15 messages 2013/07/15

[#56027] [CommonRuby - Feature #8640][Open] Add Time#elapsed to return nanoseconds since creation — "tenderlovemaking (Aaron Patterson)" <aaron@...>

24 messages 2013/07/15

[#56041] [CommonRuby - Feature #8643][Open] Add Binding.from_hash — "rosenfeld (Rodrigo Rosenfeld Rosas)" <rr.rosas@...>

26 messages 2013/07/16

[#56087] [ruby-trunk - Feature #8658][Open] Process.clock_gettime — "akr (Akira Tanaka)" <akr@...>

23 messages 2013/07/19

[#56096] [CommonRuby - Feature #8661][Open] Add option to print backstrace in reverse order(stack frames first & error last) — "gary4gar (Gaurish Sharma)" <gary4gar@...>

18 messages 2013/07/20

[#56193] [ruby-trunk - Bug #8693][Open] lambda invoked by yield acts as a proc with respect to return — "rits (First Last)" <redmine@...>

33 messages 2013/07/26

[#56274] [ruby-trunk - Bug #8709][Open] Dir.glob should return sorted file list — "tommorris (Tom Morris)" <tom@...>

19 messages 2013/07/30

[ruby-core:56234] [ruby-trunk - Bug #8697] Fixnum complement operator issue

From: "torimus (Torimus GL)" <torimus.gl@...>
Date: 2013-07-27 19:03:00 UTC
List: ruby-core #56234
Issue #8697 has been updated by torimus (Torimus GL).


=begin
When one's completion is applied to zero, the result is ((*not*)) -1 but so called "negative zero", ie. -0.
What you are talking about is two's completion, ie. "the value of 1 is then added to the resulting value of bitwise not operation".

It's all about improper use of terminology.

See related articles on Wikipedia: ((<One's complement|URL:http://en.wikipedia.org/wiki/Ones%27_complement>)) and ((<Two's complement|URL:http://en.wikipedia.org/wiki/Two%27s_complement>)) .
=end

----------------------------------------
Bug #8697: Fixnum complement operator issue
https://bugs.ruby-lang.org/issues/8697#change-40724

Author: torimus (Torimus GL)
Status: Feedback
Priority: Normal
Assignee: 
Category: core
Target version: current: 2.1.0
ruby -v: 1.9.3p448
Backport: 1.9.3: UNKNOWN, 2.0.0: UNKNOWN


=begin
By the ((<documentation|URL:http://www.ruby-doc.org/core-2.0/Fixnum.html#method-i-7E>)), bitwise complement operator ((*~*)) to Fixnum instance should do ((*one's complement*)) with just flipping all bits. In fact, current implementation does ((*two's complement*)) due to or-ing with FIXNUM_FLAG, which is defined as 1.

Either fix the documentation or the fix_rev function implementation.
Affected versions: both 1.9.3 and 2.0.0
=end



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