diff options
author | shugo <shugo@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2010-03-23 09:38:54 +0000 |
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committer | shugo <shugo@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2010-03-23 09:38:54 +0000 |
commit | a3e10f380ab276cc9192418d2a19c7e0ffc86046 (patch) | |
tree | 8e8606530db6687e552767ccf6299e17d8e4a164 | |
parent | 094d03c5d3bbbd9a68ff4f0d86bd988e29773da1 (diff) |
* object.c (rb_obj_singleton_class): new method
Kernel#singleton_class. [ruby-core:21702]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@27022 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
-rw-r--r-- | ChangeLog | 5 | ||||
-rw-r--r-- | object.c | 24 | ||||
-rw-r--r-- | test/ruby/test_object.rb | 21 |
3 files changed, 50 insertions, 0 deletions
@@ -1,3 +1,8 @@ +Tue Mar 23 18:35:46 2010 Shugo Maeda <shugo@ruby-lang.org> + + * object.c (rb_obj_singleton_class): new method + Kernel#singleton_class. [ruby-core:21702] + Tue Mar 23 01:13:59 2010 Tanaka Akira <akr@fsij.org> * ext/socket: use rsock_ prefix for internal initialization functions. @@ -162,6 +162,29 @@ rb_obj_class(VALUE obj) return rb_class_real(CLASS_OF(obj)); } +/* + * call-seq: + * obj.singleton_class => class + * + * Returns the singleton class of <i>obj</i>. This method creates + * a new singleton class if <i>obj</i> does not have it. + * + * If <i>obj</i> is <code>nil</code>, <code>true</code>, or + * <code>false</code>, it returns NilClass, TrueClass, or FalseClass, + * respectively. + * If <i>obj</i> is a Fixnum or a Symbol, it raises a TypeError. + * + * Object.new.singleton_class #=> #<Class:#<Object:0xb7ce1e24>> + * String.singleton_class #=> #<Class:String> + * nil.singleton_class #=> NilClass + */ + +static VALUE +rb_obj_singleton_class(VALUE obj) +{ + return rb_singleton_class(obj); +} + static void init_copy(VALUE dest, VALUE obj) { @@ -2585,6 +2608,7 @@ Init_Object(void) rb_define_method(rb_mKernel, "<=>", rb_obj_cmp, 1); rb_define_method(rb_mKernel, "class", rb_obj_class, 0); + rb_define_method(rb_mKernel, "singleton_class", rb_obj_singleton_class, 0); rb_define_method(rb_mKernel, "clone", rb_obj_clone, 0); rb_define_method(rb_mKernel, "dup", rb_obj_dup, 0); rb_define_method(rb_mKernel, "initialize_copy", rb_obj_init_copy, 1); diff --git a/test/ruby/test_object.rb b/test/ruby/test_object.rb index 0a49422074..63c1d32bef 100644 --- a/test/ruby/test_object.rb +++ b/test/ruby/test_object.rb @@ -561,4 +561,25 @@ class TestObject < Test::Unit::TestCase end end.call end + + def test_singleton_class + x = Object.new + xs = class << x; self; end + assert_equal(xs, x.singleton_class) + + y = Object.new + ys = y.singleton_class + assert_equal(class << y; self; end, ys) + + assert_equal(NilClass, nil.singleton_class) + assert_equal(TrueClass, true.singleton_class) + assert_equal(FalseClass, false.singleton_class) + + assert_raise(TypeError) do + 123.singleton_class + end + assert_raise(TypeError) do + :foo.singleton_class + end + end end |