[#41916] Proposal: Bitmap Marking GC — Narihiro Nakamura <authornari@...>

Hi.

18 messages 2012/01/05

[#41941] [ruby-trunk - Bug #5851][Open] make check fails when compiling with GCC 4.7 - *** longjmp causes uninitialized stack frame *** — Vit Ondruch <v.ondruch@...>

12 messages 2012/01/06

[#41979] [ruby-trunk - Bug #5865][Open] Exception#== should return false if the classes differ — Hiro Asari <asari.ruby@...>

10 messages 2012/01/08

[#42003] [ruby-trunk - Bug #5871][Open] regexp \W matches some word characters when inside a case-insensitive character class — Gareth Adams <gareth@...>

14 messages 2012/01/09

[#42016] [ruby-trunk - Feature #5873][Open] Adopt FFI over DL — Heesob Park <phasis@...>

15 messages 2012/01/10

[#42149] [ruby-trunk - Feature #5899][Open] chaining comparsions. — Ondrej Bilka <neleai@...>

12 messages 2012/01/16

[#42164] [ruby-trunk - Feature #5903][Open] Optimize st_table (take 2) — Yura Sokolov <funny.falcon@...>

18 messages 2012/01/17

[ruby-core:41966] [ruby-trunk - Bug #5855] inconsistent treatment of 8 bit characters in US-ASCII

From: John Firebaugh <john.firebaugh@...>
Date: 2012-01-07 19:59:41 UTC
List: ruby-core #41966
Issue #5855 has been updated by John Firebaugh.


Unless MRI has some non-standard definition of the term "codepoint", your second statement is incorrect. In US-ASCII, the codepoint 0x80 does not exist.

IMO, any operation that attempts to produce a US-ASCII string containing 0x80 should either fail (like "\u{80}".encode("US-ASCII")) or promote to ASCII-8BIT (like "".encode("US-ASCII") << 128.chr). So I believe the middle two examples are incorrect.
----------------------------------------
Bug #5855: inconsistent treatment of 8 bit characters in US-ASCII
https://bugs.ruby-lang.org/issues/5855

Author: John Firebaugh
Status: Rejected
Priority: Normal
Assignee: 
Category: 
Target version: 
ruby -v: ruby 1.9.3p0 (2011-10-30 revision 33570) [x86_64-darwin10.8.0]


=begin
Does Ruby allow 8 bit characters (127-255) in a US-ASCII encoded string, or not?

   "\u{80}".encode("US-ASCII")      #=> Encoding::UndefinedConversionError
   0x80.chr("US-ASCII")             #=> "\x80" (US-ASCII encoding)
   "".encode("US-ASCII") << 128     #=> "\x80" (US-ASCII encoding)
   "".encode("US-ASCII") << 128.chr #=> "\x80" (ASCII-8BIT encoding)
=end



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