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// Requires 396145d in the built library.
10// XFAIL: using-built-library-before-llvm-9
11
12// <istream>
13
14// template <class charT, class traits = char_traits<charT> >
15// class basic_istream;
16
17// operator>>(long long& val);
18
19#include <istream>
20#include <cassert>
21#include <streambuf>
22
23#include "test_macros.h"
24
25template <class CharT>
26struct testbuf
27 : public std::basic_streambuf<CharT>
28{
29 typedef std::basic_string<CharT> string_type;
30 typedef std::basic_streambuf<CharT> base;
31private:
32 string_type str_;
33public:
34
35 testbuf() {}
36 testbuf(const string_type& str)
37 : str_(str)
38 {
39 base::setg(const_cast<CharT*>(str_.data()),
40 const_cast<CharT*>(str_.data()),
41 const_cast<CharT*>(str_.data()) + str_.size());
42 }
43
44 CharT* eback() const {return base::eback();}
45 CharT* gptr() const {return base::gptr();}
46 CharT* egptr() const {return base::egptr();}
47};
48
49int main(int, char**)
50{
51 {
52 std::istream is((std::streambuf*)0);
53 long long n = 0;
54 is >> n;
55 assert(is.fail());
56 }
57 {
58 testbuf<char> sb("0");
59 std::istream is(&sb);
60 long long n = 10;
61 is >> n;
62 assert(n == 0);
63 assert( is.eof());
64 assert(!is.fail());
65 }
66 {
67 testbuf<char> sb(" 123 ");
68 std::istream is(&sb);
69 long long n = 10;
70 is >> n;
71 assert(n == 123);
72 assert(!is.eof());
73 assert(!is.fail());
74 }
75#ifndef TEST_HAS_NO_WIDE_CHARACTERS
76 {
77 testbuf<wchar_t> sb(L" -123 ");
78 std::wistream is(&sb);
79 long long n = 10;
80 is >> n;
81 assert(n == -123);
82 assert(!is.eof());
83 assert(!is.fail());
84 }
85#endif
86#ifndef TEST_HAS_NO_EXCEPTIONS
87 {
88 testbuf<char> sb;
89 std::basic_istream<char> is(&sb);
90 is.exceptions(std::ios_base::failbit);
91
92 bool threw = false;
93 try {
94 long long n = 0;
95 is >> n;
96 } catch (std::ios_base::failure const&) {
97 threw = true;
98 }
99
100 assert(!is.bad());
101 assert(is.fail());
102 assert(is.eof());
103 assert(threw);
104 }
105 {
106 testbuf<char> sb;
107 std::basic_istream<char> is(&sb);
108 is.exceptions(std::ios_base::eofbit);
109
110 bool threw = false;
111 try {
112 long long n = 0;
113 is >> n;
114 } catch (std::ios_base::failure const&) {
115 threw = true;
116 }
117
118 assert(!is.bad());
119 assert(is.fail());
120 assert(is.eof());
121 assert(threw);
122 }
123#endif // TEST_HAS_NO_EXCEPTIONS
124
125 return 0;
126}
127

source code of libcxx/test/std/input.output/iostream.format/input.streams/istream.formatted/istream.formatted.arithmetic/long_long.pass.cpp