From cec0668209483a3f233574211c4b8fbd3d1d64b7 Mon Sep 17 00:00:00 2001 From: nobu Date: Mon, 1 May 2017 07:50:53 +0000 Subject: [PATCH] object.c: Kernel#yield_self * object.c (rb_obj_yield_self): new method which yields the receiver and returns the result. [ruby-core:46320] [Feature #6721] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58528 b2dd03c8-39d4-4d8f-98ff-823fe69b080e --- NEWS | 4 ++++ object.c | 18 ++++++++++++++++++ test/ruby/test_object.rb | 8 ++++++++ 3 files changed, 30 insertions(+) diff --git a/NEWS b/NEWS index 399f1fe010..29033dd93f 100644 --- a/NEWS +++ b/NEWS @@ -40,6 +40,10 @@ with all sufficient information, see the ChangeLog file or Redmine * exception message "stream closed" is changed [Bug #13405] +* Kernel + + * Kernel#yield_self [Feature #6721] + * Numeric * Numerical comparison operators (<,<=,>=,>) no longer rescue exceptions diff --git a/object.c b/object.c index 92cea14514..184a72f1fa 100644 --- a/object.c +++ b/object.c @@ -497,6 +497,23 @@ rb_obj_itself(VALUE obj) return obj; } +/* + * call-seq: + * obj.yield_self {|_obj|...} -> an_object + * + * Yields obj and returns the result. + * + * 'my string'.yield_self {|s|s.upcase} #=> "MY STRING" + * + */ + +static VALUE +rb_obj_yield_self(VALUE obj) +{ + RETURN_ENUMERATOR(obj, 0, 0); + return rb_yield_values2(1, &obj); +} + /* :nodoc: */ VALUE rb_obj_init_copy(VALUE obj, VALUE orig) @@ -3507,6 +3524,7 @@ InitVM_Object(void) rb_define_method(rb_mKernel, "clone", rb_obj_clone2, -1); rb_define_method(rb_mKernel, "dup", rb_obj_dup, 0); rb_define_method(rb_mKernel, "itself", rb_obj_itself, 0); + rb_define_method(rb_mKernel, "yield_self", rb_obj_yield_self, 0); rb_define_method(rb_mKernel, "initialize_copy", rb_obj_init_copy, 1); rb_define_method(rb_mKernel, "initialize_dup", rb_obj_init_dup_clone, 1); rb_define_method(rb_mKernel, "initialize_clone", rb_obj_init_dup_clone, 1); diff --git a/test/ruby/test_object.rb b/test/ruby/test_object.rb index d93d5594a7..6a1a82546a 100644 --- a/test/ruby/test_object.rb +++ b/test/ruby/test_object.rb @@ -18,6 +18,14 @@ class TestObject < Test::Unit::TestCase assert_same(object, object.itself, feature6373) end + def test_yield_self + feature = '[ruby-core:46320] [Feature #6721]' + object = Object.new + assert_same(self, object.yield_self {self}, feature) + assert_same(object, object.yield_self {|x| break x}, feature) + assert_instance_of(Enumerator, object.yield_self) + end + def test_dup assert_equal 1, 1.dup assert_equal true, true.dup