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>>(void*& 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 void* n = 0;
54 is >> n;
55 assert(is.fail());
56 }
57 {
58 testbuf<char> sb("0");
59 std::istream is(&sb);
60 void* n = (void*)1;
61 is >> n;
62 assert(n == 0);
63 assert( is.eof());
64 assert(!is.fail());
65 }
66 {
67 testbuf<char> sb(" 1 ");
68 std::istream is(&sb);
69 void* n = 0;
70 is >> n;
71 assert(n == (void*)1);
72 assert(!is.eof());
73 assert(!is.fail());
74 }
75#ifndef TEST_HAS_NO_WIDE_CHARACTERS
76 {
77 testbuf<wchar_t> sb(L" 1 ");
78 std::wistream is(&sb);
79 void* n = 0;
80 is >> n;
81 assert(n == (void*)1);
82 assert(!is.eof());
83 assert(!is.fail());
84 }
85#endif
86 {
87 testbuf<char> sb("12345678");
88 std::istream is(&sb);
89 void* n = 0;
90 is >> n;
91 assert(n == (void*)0x12345678);
92 assert( is.eof());
93 assert(!is.fail());
94 }
95#ifndef TEST_HAS_NO_WIDE_CHARACTERS
96 {
97 testbuf<wchar_t> sb(L"12345678");
98 std::wistream is(&sb);
99 void* n = 0;
100 is >> n;
101 assert(n == (void*)0x12345678);
102 assert( is.eof());
103 assert(!is.fail());
104 }
105#endif
106#ifndef TEST_HAS_NO_EXCEPTIONS
107 {
108 testbuf<char> sb;
109 std::basic_istream<char> is(&sb);
110 is.exceptions(std::ios_base::failbit);
111
112 bool threw = false;
113 try {
114 void* n = 0;
115 is >> n;
116 } catch (std::ios_base::failure const&) {
117 threw = true;
118 }
119
120 assert(!is.bad());
121 assert(is.fail());
122 assert(is.eof());
123 assert(threw);
124 }
125 {
126 testbuf<char> sb;
127 std::basic_istream<char> is(&sb);
128 is.exceptions(std::ios_base::eofbit);
129
130 bool threw = false;
131 try {
132 void* n = 0;
133 is >> n;
134 } catch (std::ios_base::failure const&) {
135 threw = true;
136 }
137
138 assert(!is.bad());
139 assert(is.fail());
140 assert(is.eof());
141 assert(threw);
142 }
143#endif // TEST_HAS_NO_EXCEPTIONS
144
145 return 0;
146}
147

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