rb_reg_match_post  518 include/ruby/intern.h VALUE rb_reg_match_post(VALUE);
rb_reg_match_post 1509 re.c               return rb_reg_match_post(rb_backref_get());
rb_reg_match_post 3430 re.c               rb_define_method(rb_cMatch, "post_match", rb_reg_match_post, 0);
rb_reg_match_post  985 vm_insnhelper.c 		val = rb_reg_match_post(backref);