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 // <string> 10 11 // template<class charT, class traits, class Allocator> 12 // basic_istream<charT,traits>& 13 // operator>>(basic_istream<charT,traits>& is, 14 // basic_string<charT,traits,Allocator>& str); 15 16 #include <string> 17 #include <sstream> 18 #include <cassert> 19 20 #include "min_allocator.h" 21 22 int main() 23 { 24 { 25 std::istringstream in("a bc defghij"); 26 std::string s("initial text"); 27 in >> s; 28 assert(in.good()); 29 assert(s == "a"); 30 assert(in.peek() == ' '); 31 in >> s; 32 assert(in.good()); 33 assert(s == "bc"); 34 assert(in.peek() == ' '); 35 in.width(3); 36 in >> s; 37 assert(in.good()); 38 assert(s == "def"); 39 assert(in.peek() == 'g'); 40 in >> s; 41 assert(in.eof()); 42 assert(s == "ghij"); 43 in >> s; 44 assert(in.fail()); 45 } 46 { 47 std::wistringstream in(L"a bc defghij"); 48 std::wstring s(L"initial text"); 49 in >> s; 50 assert(in.good()); 51 assert(s == L"a"); 52 assert(in.peek() == L' '); 53 in >> s; 54 assert(in.good()); 55 assert(s == L"bc"); 56 assert(in.peek() == L' '); 57 in.width(3); 58 in >> s; 59 assert(in.good()); 60 assert(s == L"def"); 61 assert(in.peek() == L'g'); 62 in >> s; 63 assert(in.eof()); 64 assert(s == L"ghij"); 65 in >> s; 66 assert(in.fail()); 67 } 68 #if TEST_STD_VER >= 11 69 { 70 typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S; 71 std::istringstream in("a bc defghij"); 72 S s("initial text"); 73 in >> s; 74 assert(in.good()); 75 assert(s == "a"); 76 assert(in.peek() == ' '); 77 in >> s; 78 assert(in.good()); 79 assert(s == "bc"); 80 assert(in.peek() == ' '); 81 in.width(3); 82 in >> s; 83 assert(in.good()); 84 assert(s == "def"); 85 assert(in.peek() == 'g'); 86 in >> s; 87 assert(in.eof()); 88 assert(s == "ghij"); 89 in >> s; 90 assert(in.fail()); 91 } 92 { 93 typedef std::basic_string<wchar_t, std::char_traits<wchar_t>, min_allocator<wchar_t>> S; 94 std::wistringstream in(L"a bc defghij"); 95 S s(L"initial text"); 96 in >> s; 97 assert(in.good()); 98 assert(s == L"a"); 99 assert(in.peek() == L' '); 100 in >> s; 101 assert(in.good()); 102 assert(s == L"bc"); 103 assert(in.peek() == L' '); 104 in.width(3); 105 in >> s; 106 assert(in.good()); 107 assert(s == L"def"); 108 assert(in.peek() == L'g'); 109 in >> s; 110 assert(in.eof()); 111 assert(s == L"ghij"); 112 in >> s; 113 assert(in.fail()); 114 } 115 #endif 116 } 117