1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
10
11// template<container-compatible-range<T> R>
12// vector(from_range_t, R&& rg, const Allocator& = Allocator()); // C++23
13
14#include <sstream>
15#include <vector>
16
17#include "../../from_range_sequence_containers.h"
18#include "asan_testing.h"
19#include "test_macros.h"
20
21constexpr bool test() {
22 for_all_iterators_and_allocators<int>(f: []<class Iter, class Sent, class Alloc>() {
23 test_sequence_container<std::vector, int, Iter, Sent, Alloc>([]([[maybe_unused]] const auto& c) {
24 LIBCPP_ASSERT(c.__invariants());
25 LIBCPP_ASSERT(is_contiguous_container_asan_correct(c));
26 });
27 });
28 test_sequence_container_move_only<std::vector>();
29
30 { // Ensure input-only sized ranges are accepted.
31 using input_iter = cpp20_input_iterator<const int*>;
32 const int in[]{1, 2, 3, 4};
33 std::vector v(std::from_range, std::views::counted(input_iter{std::ranges::begin(in)}, std::ranges::ssize(in)));
34 assert(std::ranges::equal(v, std::vector<int>{1, 2, 3, 4}));
35 }
36
37 return true;
38}
39
40#ifndef TEST_HAS_NO_LOCALIZATION
41void test_counted_istream_view() {
42 std::istringstream is{"1 2 3 4"};
43 auto vals = std::views::istream<int>(is);
44 std::vector v(std::from_range, std::views::counted(vals.begin(), 3));
45 assert(v == (std::vector{1, 2, 3}));
46}
47#endif
48
49int main(int, char**) {
50 static_assert(test_constraints<std::vector, int, double>());
51 test();
52
53 static_assert(test());
54
55 test_exception_safety_throwing_copy<std::vector>();
56 test_exception_safety_throwing_allocator<std::vector, int>();
57
58#ifndef TEST_HAS_NO_LOCALIZATION
59 test_counted_istream_view();
60#endif
61
62 return 0;
63}
64

source code of libcxx/test/std/containers/sequences/vector/vector.cons/construct_from_range.pass.cpp