* array.c (rb_ary_to_a): return value should be an Array if the

  receiver is an instance of subclass of Array.

* string.c (rb_str_to_s): return value should be a String if the
  receiver is an instance of subclass of String.

* eval.c (rb_call): calls method_missing when superclass method
  does not exist.

* eval.c (rb_f_missing): now handles "no super" case.

* object.c (rb_obj_ivar_get): Object#instance_variable_get: new
  method to get instance variable value without eval(). [new]

* object.c (rb_obj_ivar_set): Object#instance_variable_set: new
  method to set instance variable value without eval(). [new]


git-svn-id: http://svn.ruby-lang.org/repos/ruby/trunk@3473 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 5 insertions, 0 deletions

diff --git a/string.c b/string.c
index 99813c969..44f78a6b3 100644
--- a/string.c
+++ b/string.c
@@ -1849,6 +1849,11 @@ static VALUE
 rb_str_to_s(str)
     VALUE str;
 {
+    if (rb_obj_class(str) != rb_cString) {
+	VALUE dup = str_alloc(rb_cString);
+	rb_str_replace(dup, str);
+	return dup;
+    }
     return str;
 }