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update description about rb_cFixnum and rb_cBignum.

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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@55465 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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akr 2016-06-20 07:35:05 +00:00
parent 76941e5f54
commit 76e8beb6e1
1 changed files with 6 additions and 4 deletions
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@ -121,10 +121,12 @@ with all sufficient information, see the ChangeLog file or Redmine
For example, 0 is an instance of Integer: 0.class returns Integer.
The constants Fixnum and Bignum is bound to Integer.
So obj.kind_of?(Fixnum) works as obj.kind_of?(Integer).
At C-level, rb_cFixnum and rb_cBignum is same as rb_cInteger.
So, class based dispatch, such as klass == rb_cFixnum and
klass == rb_cBignum, should be changed to FIXNUM_P(obj) and
RB_TYPE_P(obj, T_BIGNUM).
At C-level, Fixnum object and Bignum object should be distinguished by
FIXNUM_P(obj) and RB_TYPE_P(obj, T_BIGNUM).
ruby-2.4.0-preview1 (temporally) removes rb_cFixnum and rb_cBignum
to check the effect of incompatibility.
(rb_cFixnum and rb_cBignum may be defined as rb_cInteger later if
compilation failure of extension library is too big problem.)
* String/Symbol#upcase/downcase/swapcase/capitalize(!) now work for all of
Unicode, not only for ASCII. [Feature #10085]