// // Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2022 // // Distributed under the Boost Software License, Version 1.0. (See accompanying // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) // #include "td/utils/Slice.h" #include "td/utils/StringBuilder.h" #include "td/utils/tests.h" #include "td/utils/Variant.h" static const size_t BUF_SIZE = 1024 * 1024; static char buf[BUF_SIZE], buf2[BUF_SIZE]; static td::StringBuilder sb(td::MutableSlice(buf, BUF_SIZE - 1)); static td::StringBuilder sb2(td::MutableSlice(buf2, BUF_SIZE - 1)); static td::string move_sb() { auto res = sb.as_cslice().str(); sb.clear(); return res; } static td::string name(int id) { if (id == 1) { return "A"; } if (id == 2) { return "B"; } if (id == 3) { return "C"; } return ""; } template <int id> class Class { public: Class() { sb << "+" << name(id); } Class(const Class &) = delete; Class &operator=(const Class &) = delete; Class(Class &&) = delete; Class &operator=(Class &&) = delete; ~Class() { sb << "-" << name(id); } }; using A = Class<1>; using B = Class<2>; using C = Class<3>; TEST(Variant, simple) { { td::Variant<td::unique_ptr<A>, td::unique_ptr<B>, td::unique_ptr<C>> abc; ASSERT_STREQ("", sb.as_cslice()); abc = td::make_unique<A>(); ASSERT_STREQ("+A", sb.as_cslice()); sb.clear(); abc = td::make_unique<B>(); ASSERT_STREQ("+B-A", sb.as_cslice()); sb.clear(); abc = td::make_unique<C>(); ASSERT_STREQ("+C-B", sb.as_cslice()); sb.clear(); } ASSERT_STREQ("-C", move_sb()); sb.clear(); }