84 lines · cpp
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-exception6//7//===----------------------------------------------------------------------===//8// UNSUPPORTED: c++03, c++11, c++14, c++179 10// <list>11 12// template <class T, class Allocator, class U>13// typename list<T, Allocator>::size_type14// erase(list<T, Allocator>& c, const U& value); // constexpr since C++2615 16#include <list>17#include <optional>18 19#include "test_macros.h"20#include "test_allocator.h"21#include "min_allocator.h"22 23template <class S, class U>24TEST_CONSTEXPR_CXX26 void test0(S s, U val, S expected, std::size_t expected_erased_count) {25 ASSERT_SAME_TYPE(typename S::size_type, decltype(std::erase(s, val)));26 assert(expected_erased_count == std::erase(s, val));27 assert(s == expected);28}29 30template <class S>31TEST_CONSTEXPR_CXX26 void test1() {32 test0(S(), 1, S(), 0);33 34 test0(S({1}), 1, S(), 1);35 test0(S({1}), 2, S({1}), 0);36 37 test0(S({1, 2}), 1, S({2}), 1);38 test0(S({1, 2}), 2, S({1}), 1);39 test0(S({1, 2}), 3, S({1, 2}), 0);40 test0(S({1, 1}), 1, S(), 2);41 test0(S({1, 1}), 3, S({1, 1}), 0);42 43 test0(S({1, 2, 3}), 1, S({2, 3}), 1);44 test0(S({1, 2, 3}), 2, S({1, 3}), 1);45 test0(S({1, 2, 3}), 3, S({1, 2}), 1);46 test0(S({1, 2, 3}), 4, S({1, 2, 3}), 0);47 48 test0(S({1, 1, 1}), 1, S(), 3);49 test0(S({1, 1, 1}), 2, S({1, 1, 1}), 0);50 test0(S({1, 1, 2}), 1, S({2}), 2);51 test0(S({1, 1, 2}), 2, S({1, 1}), 1);52 test0(S({1, 1, 2}), 3, S({1, 1, 2}), 0);53 test0(S({1, 2, 2}), 1, S({2, 2}), 1);54 test0(S({1, 2, 2}), 2, S({1}), 2);55 test0(S({1, 2, 2}), 3, S({1, 2, 2}), 0);56 57 // Test cross-type erasure58 using opt = std::optional<typename S::value_type>;59 test0(S({1, 2, 1}), opt(), S({1, 2, 1}), 0);60 test0(S({1, 2, 1}), opt(1), S({2}), 2);61 test0(S({1, 2, 1}), opt(2), S({1, 1}), 1);62 test0(S({1, 2, 1}), opt(3), S({1, 2, 1}), 0);63}64 65TEST_CONSTEXPR_CXX26 bool test() {66 test1<std::list<int>>();67 test1<std::list<int, min_allocator<int>>>();68 test1<std::list<int, test_allocator<int>>>();69 70 test1<std::list<long>>();71 test1<std::list<double>>();72 73 return true;74}75 76int main(int, char**) {77 assert(test());78#if TEST_STD_VER >= 2679 static_assert(test());80#endif81 82 return 0;83}84