rb_obj_encoding  7957 ext/tk/tcltklib.c             enc = rb_funcallv(rb_obj_encoding(str), ID_to_s, 0, 0);
rb_obj_encoding   139 include/ruby/encoding.h VALUE rb_obj_encoding(VALUE);
rb_obj_encoding  3947 re.c               rb_define_method(rb_cRegexp, "encoding", rb_obj_encoding, 0); /* in encoding.c */
rb_obj_encoding  9599 string.c           return rb_obj_encoding(rb_sym2str(sym));
rb_obj_encoding  9787 string.c           rb_define_method(rb_cString, "encoding", rb_obj_encoding, 0); /* in encoding.c */
rb_obj_encoding  2680 transcode.c    	    arg1 = rb_obj_encoding(str);