ruby-core

Hi,

2008/1/3, David A. Black <dblack@rubypal.com>:
> Hi --
>
> On Wed, 2 Jan 2008, Sylvain Joyeux wrote:
>
> > In 1.9.0, the singleton of a singleton is Class, while in 1.8 it was a
> > singleton itself (see below). Is that an intended behaviour just to
> > make singletons slightly different than real classes, or is it a bug ?
> >
> > [~]% irb1.9
> >>> obj = Object.new
> > => #<Object:0x3026d420>
> >>> sing = class << obj; self end
> > => #<Class:#<Object:0x3026d420>>
> >>> sing_of_sing = class << sing; self end
> > => Class
> >
> > [~]% irb
> >>> obj = Object.new
> > => #<Object:0x301b2940>
> >>> sing = class << obj; self end
> > => #<Class:#<Object:0x301b2940>>
> >>> sing_of_sing = class << sing; self end
> > => #<Class:#<Class:#<Object:0x301b2940>>>
>
> I would think it must be a bug. It makes it impossible to add class
> methods of a singleton class, which would be an odd limitation. (Maybe
> not the most frequent use case, but even so.)

I think so, too.  Looks like this change was made at the revision 8068,
but I cannot understand the rationale from the commit log.

$ svn -r8068 log
------------------------------------------------------------------------
r8068 | matz | 2005-03-04 15:47:45 +0900 (Fri, 04 Mar 2005) | 149 lines

* array.c: replace rb_protect_inspect() and rb_inspecting_p() by
  rb_exec_recursive() in eval.c.

* eval.c (rb_exec_recursive): new function.

* array.c (rb_ary_join): use rb_exec_recursive().

* array.c (rb_ary_inspect, rb_ary_hash): ditto.

* file.c (rb_file_join): ditto.

* hash.c (rb_hash_inspect, rb_hash_to_s, rb_hash_hash): ditto.

* io.c (rb_io_puts): ditto.

* object.c (rb_obj_inspect): ditto

* struct.c (rb_struct_inspect): ditto.

* lib/set.rb (SortedSet::setup): a hack to shut up warning.
  [ruby-talk:132866]

* lib/time.rb (Time::strptime): add new function.  inspired by
  [ruby-talk:132815].

* lib/parsedate.rb (ParseDate::strptime): ditto.

* regparse.c: move st_*_strend() functions from st.c.  fixed some
  potential memory leaks.

* exception error messages updated.  [ruby-core:04497]

* ext/socket/socket.c (Init_socket): add bunch of Socket
  constants.  Patch from Sam Roberts <sroberts@uniserve.com>.
  [ruby-core:04409]

* array.c (rb_ary_s_create): no need for negative argc check.
  [ruby-core:04463]

* array.c (rb_ary_unshift_m): ditto.

* lib/xmlrpc/parser.rb (XMLRPC::FaultException): make it subclass
  of StandardError class, not Exception class.  [ruby-core:04429]

* parse.y (fcall_gen): lvar(arg) will be evaluated as
  lvar.call(arg) when lvar is a defined local variable. [new]

* object.c (rb_class_initialize): call inherited method before
  calling initializing block.

* eval.c (rb_thread_start_1): initialize newly pushed frame.

* lib/open3.rb (Open3::popen3): $? should not be EXIT_FAILURE.
  fixed: [ruby-core:04444]

* eval.c (is_defined): NODE_IASGN is an assignment.

* ext/readline/readline.c (Readline.readline): use rl_outstream
  and rl_instream.  [ruby-dev:25699]

* ext/etc/etc.c (Init_etc): sGroup needs HAVE_ST_GR_PASSWD check
  [ruby-dev:25675]

* misc/ruby-mode.el: [ruby-core:04415]

* lib/rdoc/generators/html_generator.rb: [ruby-core:04412]

* lib/rdoc/generators/ri_generator.rb: ditto.

* struct.c (make_struct): fixed: [ruby-core:04402]

* ext/curses/curses.c (window_color_set): [ruby-core:04393]

* ext/socket/socket.c (Init_socket): SO_REUSEPORT added.
  [ruby-talk:130092]

* object.c: [ruby-doc:818]

* parse.y (open_args): fix too verbose warnings for the space
  before argument parentheses.  [ruby-dev:25492]

* parse.y (parser_yylex): ditto.

* parse.y (parser_yylex): the first expression in the parentheses
  should not be a command.  [ruby-dev:25492]

* lib/irb/context.rb (IRB::Context::initialize): [ruby-core:04330]

* object.c (Init_Object): remove Object#type.  [ruby-core:04335]

* st.c (st_foreach): report success/failure by return value.
  [ruby-Bugs-1396]

* parse.y: forgot to initialize parser struct.  [ruby-dev:25492]

* parse.y (parser_yylex): no tLABEL on EXPR_BEG.
  [ruby-talk:127711]

* document updates - [ruby-core:04296], [ruby-core:04301],
  [ruby-core:04302], [ruby-core:04307]

* dir.c (rb_push_glob): should work for NUL delimited patterns.

* dir.c (rb_glob2): should aware of offset in the pattern.

* string.c (rb_str_new4): should propagate taintedness.

* env.h: rename member names in struct FRAME; last_func -> callee,
  orig_func -> this_func, last_class -> this_class.

* struct.c (rb_struct_set): use original method name, not callee
  name, to retrieve member slot.  [ruby-core:04268]

* time.c (time_strftime): protect from format modification from GC
  finalizers.

* object.c (Init_Object): remove rb_obj_id_obsolete()

* eval.c (rb_mod_define_method): incomplete subclass check.
  [ruby-dev:25464]

* gc.c (rb_data_object_alloc): klass may be NULL.
  [ruby-list:40498]

* bignum.c (rb_big_rand): should return positive random number.
  [ruby-dev:25401]

* bignum.c (rb_big_rand): do not use rb_big_modulo to generate
  random bignums.  [ruby-dev:25396]

* variable.c (rb_autoload): [ruby-dev:25373]

* eval.c (svalue_to_avalue): [ruby-dev:25366]

* string.c (rb_str_justify): [ruby-dev:25367]

* io.c (rb_f_select): [ruby-dev:25312]

* ext/socket/socket.c (sock_s_getservbyport): [ruby-talk:124072]

* struct.c (make_struct): [ruby-dev:25249]

* dir.c (dir_open_dir): new function.  [ruby-dev:25242]

* io.c (rb_f_open): add type check for return value from to_open.

* lib/pstore.rb (PStore#transaction): Use the empty content when a
  file is not found.  [ruby-dev:24561]

------------------------------------------------------------------------

-- 
Yusuke ENDOH <mame@tsg.ne.jp>

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