#include "ruby.h" static VALUE bug_struct_new_duplicate(VALUE obj, VALUE name, VALUE mem) { const char *n = NIL_P(name) ? 0 : StringValueCStr(name); const char *m = StringValueCStr(mem); return rb_struct_define(n, m, m, NULL); } static VALUE bug_struct_new_duplicate_under(VALUE obj, VALUE name, VALUE mem) { const char *n = StringValueCStr(name); const char *m = StringValueCStr(mem); return rb_struct_define_under(obj, n, m, m, NULL); } void Init_duplicate(VALUE klass) { rb_define_singleton_method(klass, "new_duplicate", bug_struct_new_duplicate, 2); rb_define_singleton_method(klass, "new_duplicate_under", bug_struct_new_duplicate_under, 2); }