| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | // UNSUPPORTED: c++03, c++11, c++14, c++17 |
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| 10 | |
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| 11 | // <sstream> |
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| 12 | |
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| 13 | // template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> > |
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| 14 | // class basic_stringstream |
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| 15 | |
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| 16 | // basic_string_view<charT, traits> view() const noexcept; |
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| 17 | |
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| 18 | #include <sstream> |
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| 19 | #include <cassert> |
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| 20 | #include <type_traits> |
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| 21 | |
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| 22 | #include "make_string.h" |
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| 23 | #include "test_macros.h" |
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| 24 | |
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| 25 | #define STR(S) MAKE_STRING(CharT, S) |
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| 26 | #define SV(S) MAKE_STRING_VIEW(CharT, S) |
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| 27 | |
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| 28 | template <class CharT> |
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| 29 | struct my_char_traits : public std::char_traits<CharT> {}; |
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| 30 | |
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| 31 | template <class CharT> |
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| 32 | static void test() { |
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| 33 | std::basic_stringstream<CharT> ss(STR(" 123 456 " )); |
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| 34 | static_assert(noexcept(ss.view())); |
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| 35 | assert(ss.view() == SV(" 123 456 " )); |
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| 36 | int i = 0; |
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| 37 | ss >> i; |
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| 38 | assert(i == 123); |
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| 39 | ss >> i; |
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| 40 | assert(i == 456); |
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| 41 | ss << i << ' ' << 123; |
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| 42 | assert(ss.view() == SV("456 1236 " )); |
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| 43 | ss.str(STR("5466 89 " )); |
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| 44 | ss >> i; |
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| 45 | assert(i == 5466); |
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| 46 | ss >> i; |
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| 47 | assert(i == 89); |
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| 48 | ss << i << ' ' << 321; |
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| 49 | assert(ss.view() == SV("89 3219 " )); |
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| 50 | |
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| 51 | const std::basic_stringstream<CharT> css(STR("abc" )); |
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| 52 | static_assert(noexcept(css.view())); |
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| 53 | assert(css.view() == SV("abc" )); |
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| 54 | |
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| 55 | std::basic_stringstream<CharT, my_char_traits<CharT>> tss; |
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| 56 | static_assert(std::is_same_v<decltype(tss.view()), std::basic_string_view<CharT, my_char_traits<CharT>>>); |
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| 57 | } |
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| 58 | |
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| 59 | int main(int, char**) { |
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| 60 | test<char>(); |
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| 61 | #ifndef TEST_HAS_NO_WIDE_CHARACTERS |
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| 62 | test<wchar_t>(); |
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| 63 | #endif |
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| 64 | std::stringstream ss; |
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| 65 | ss.write(s: "\xd1" , n: 1); |
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| 66 | assert(ss.view().length() == 1); |
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| 67 | return 0; |
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| 68 | } |
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| 69 | |
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