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-rw-r--r--object.c4
-rw-r--r--spec/ruby/core/kernel/yield_self_spec.rb5
2 files changed, 8 insertions, 1 deletions
diff --git a/object.c b/object.c
index 7a9ee001e6e..036e07b64f7 100644
--- a/object.c
+++ b/object.c
@@ -564,12 +564,13 @@ rb_obj_size(VALUE self, VALUE args, VALUE obj)
/*
* call-seq:
+ * obj.then {|x| block } -> an_object
* obj.yield_self {|x| block } -> an_object
*
* Yields self to the block and returns the result of the block.
*
+ * 3.next.then {|x| x**x }.to_s #=> "256"
* "my string".yield_self {|s| s.upcase } #=> "MY STRING"
- * 3.next.yield_self {|x| x**x }.to_s #=> "256"
*
*/
@@ -4065,6 +4066,7 @@ InitVM_Object(void)
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, "then", 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/spec/ruby/core/kernel/yield_self_spec.rb b/spec/ruby/core/kernel/yield_self_spec.rb
index 4aa5335db51..0bcf0660c2f 100644
--- a/spec/ruby/core/kernel/yield_self_spec.rb
+++ b/spec/ruby/core/kernel/yield_self_spec.rb
@@ -20,5 +20,10 @@ ruby_version_is "2.5" do
enum.peek.should equal object
enum.first.should equal object
end
+
+ it "has an alias `then`" do
+ object = Object.new
+ object.then { 42 }.should equal 42
+ end
end
end