| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <string> |
| |
| // basic_string<charT,traits,Allocator>& |
| // assign(const charT* s, size_type n); |
| |
| #include <string> |
| #include <stdexcept> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| #include "min_allocator.h" |
| |
| template <class S> |
| void |
| test(S s, const typename S::value_type* str, typename S::size_type n, S expected) |
| { |
| s.assign(str, n); |
| LIBCPP_ASSERT(s.__invariants()); |
| assert(s == expected); |
| } |
| |
| int main(int, char**) |
| { |
| { |
| typedef std::string S; |
| test(S(), "", 0, S()); |
| test(S(), "12345", 3, S("123")); |
| test(S(), "12345", 4, S("1234")); |
| test(S(), "12345678901234567890", 0, S()); |
| test(S(), "12345678901234567890", 1, S("1")); |
| test(S(), "12345678901234567890", 3, S("123")); |
| test(S(), "12345678901234567890", 20, S("12345678901234567890")); |
| |
| test(S("12345"), "", 0, S()); |
| test(S("12345"), "12345", 5, S("12345")); |
| test(S("12345"), "1234567890", 10, S("1234567890")); |
| |
| test(S("12345678901234567890"), "", 0, S()); |
| test(S("12345678901234567890"), "12345", 5, S("12345")); |
| test(S("12345678901234567890"), "12345678901234567890", 20, |
| S("12345678901234567890")); |
| } |
| #if TEST_STD_VER >= 11 |
| { |
| typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S; |
| test(S(), "", 0, S()); |
| test(S(), "12345", 3, S("123")); |
| test(S(), "12345", 4, S("1234")); |
| test(S(), "12345678901234567890", 0, S()); |
| test(S(), "12345678901234567890", 1, S("1")); |
| test(S(), "12345678901234567890", 3, S("123")); |
| test(S(), "12345678901234567890", 20, S("12345678901234567890")); |
| |
| test(S("12345"), "", 0, S()); |
| test(S("12345"), "12345", 5, S("12345")); |
| test(S("12345"), "1234567890", 10, S("1234567890")); |
| |
| test(S("12345678901234567890"), "", 0, S()); |
| test(S("12345678901234567890"), "12345", 5, S("12345")); |
| test(S("12345678901234567890"), "12345678901234567890", 20, |
| S("12345678901234567890")); |
| } |
| #endif |
| { // test assign to self |
| typedef std::string S; |
| S s_short = "123/"; |
| S s_long = "Lorem ipsum dolor sit amet, consectetur/"; |
| |
| s_short.assign(s_short.data(), s_short.size()); |
| assert(s_short == "123/"); |
| s_short.assign(s_short.data() + 2, s_short.size() - 2); |
| assert(s_short == "3/"); |
| |
| s_long.assign(s_long.data(), s_long.size()); |
| assert(s_long == "Lorem ipsum dolor sit amet, consectetur/"); |
| |
| s_long.assign(s_long.data() + 2, 8 ); |
| assert(s_long == "rem ipsu"); |
| } |
| |
| return 0; |
| } |