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 // UNSUPPORTED: c++98, c++03, c++11, c++14, c++17 9 10 // <string> 11 12 // template <class charT, class traits, class Allocator, class Predicate> 13 // void erase_if(basic_string<charT, traits, Allocator>& c, Predicate pred); 14 15 #include <string> 16 17 #include "test_macros.h" 18 #include "test_allocator.h" 19 #include "min_allocator.h" 20 21 template <class S, class Pred> 22 void 23 test0(S s, Pred p, S expected) 24 { 25 ASSERT_SAME_TYPE(void, decltype(std::erase_if(s, p))); 26 std::erase_if(s, p); 27 LIBCPP_ASSERT(s.__invariants()); 28 assert(s == expected); 29 } 30 31 template <typename S> 32 void test() 33 { 34 auto isA = [](auto ch) { return ch == 'a';}; 35 auto isB = [](auto ch) { return ch == 'b';}; 36 auto isC = [](auto ch) { return ch == 'c';}; 37 auto isD = [](auto ch) { return ch == 'd';}; 38 auto True = [](auto) { return true; }; 39 auto False = [](auto) { return false; }; 40 41 test0(S(""), isA, S("")); 42 43 test0(S("a"), isA, S("")); 44 test0(S("a"), isB, S("a")); 45 46 test0(S("ab"), isA, S("b")); 47 test0(S("ab"), isB, S("a")); 48 test0(S("ab"), isC, S("ab")); 49 test0(S("aa"), isA, S("")); 50 test0(S("aa"), isC, S("aa")); 51 52 test0(S("abc"), isA, S("bc")); 53 test0(S("abc"), isB, S("ac")); 54 test0(S("abc"), isC, S("ab")); 55 test0(S("abc"), isD, S("abc")); 56 57 test0(S("aab"), isA, S("b")); 58 test0(S("aab"), isB, S("aa")); 59 test0(S("aab"), isC, S("aab")); 60 test0(S("abb"), isA, S("bb")); 61 test0(S("abb"), isB, S("a")); 62 test0(S("abb"), isC, S("abb")); 63 test0(S("aaa"), isA, S("")); 64 test0(S("aaa"), isB, S("aaa")); 65 66 test0(S("aba"), False, S("aba")); 67 test0(S("aba"), True, S("")); 68 } 69 70 int main(int, char**) 71 { 72 test<std::string>(); 73 test<std::basic_string<char, std::char_traits<char>, min_allocator<char>>> (); 74 test<std::basic_string<char, std::char_traits<char>, test_allocator<char>>> (); 75 76 return 0; 77 } 78