1// { dg-options "-std=gnu++14" }
2
3// Copyright (C) 2013-2015 Free Software Foundation, Inc.
4//
5// This file is part of the GNU ISO C++ Library.  This library is free
6// software; you can redistribute it and/or modify it under the
7// terms of the GNU General Public License as published by the
8// Free Software Foundation; either version 3, or (at your option)
9// any later version.
10
11// This library is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14// GNU General Public License for more details.
15
16// You should have received a copy of the GNU General Public License along
17// with this library; see the file COPYING3.  If not see
18// <http://www.gnu.org/licenses/>.
19
20// string_view size, length
21
22#include <experimental/string_view>
23#include <cstring>
24#include <testsuite_hooks.h>
25
26template<typename T>
27  struct A { };
28
29template<typename T>
30  bool
31  operator==(const A<T>&, const A<T>&) { return true; }
32
33template<typename T>
34  bool
35  operator<(const A<T>&, const A<T>&) { return true; }
36
37struct B { };
38
39// char_traits specialization
40namespace std
41{
42  template<>
43    struct char_traits<A<B> >
44    {
45      typedef A<B> 		char_type;
46      // Unsigned as wint_t in unsigned.
47      typedef unsigned long  	int_type;
48      typedef streampos 	pos_type;
49      typedef streamoff 	off_type;
50      typedef mbstate_t 	state_type;
51
52      static void
53      assign(char_type& __c1, const char_type& __c2)
54      { __c1 = __c2; }
55
56      static bool
57      eq(const char_type& __c1, const char_type& __c2)
58      { return __c1 == __c2; }
59
60      static bool
61      lt(const char_type& __c1, const char_type& __c2)
62      { return __c1 < __c2; }
63
64      static int
65      compare(const char_type* __s1, const char_type* __s2, size_t __n)
66      {
67	for (size_t __i = 0; __i < __n; ++__i)
68	  if (!eq(__s1[__i], __s2[__i]))
69	    return lt(__s1[__i], __s2[__i]) ? -1 : 1;
70	return 0;
71      }
72
73      static size_t
74      length(const char_type* __s)
75      {
76	const char_type* __p = __s;
77	while (__p)
78	  ++__p;
79	return (__p - __s);
80      }
81
82      static const char_type*
83      find(const char_type* __s, size_t __n, const char_type& __a)
84      {
85	for (const char_type* __p = __s; size_t(__p - __s) < __n; ++__p)
86	  if (*__p == __a) return __p;
87	return 0;
88      }
89
90      static char_type*
91      move(char_type* __s1, const char_type* __s2, size_t __n)
92      { return (char_type*) memmove(__s1, __s2, __n * sizeof(char_type)); }
93
94      static char_type*
95      copy(char_type* __s1, const char_type* __s2, size_t __n)
96      { return (char_type*) memcpy(__s1, __s2, __n * sizeof(char_type)); }
97
98      static char_type*
99      assign(char_type* __s, size_t __n, char_type __a)
100      {
101	for (char_type* __p = __s; __p < __s + __n; ++__p)
102	  assign(*__p, __a);
103        return __s;
104      }
105
106      static char_type
107      to_char_type(const int_type&)
108      { return char_type(); }
109
110      static int_type
111      to_int_type(const char_type&) { return int_type(); }
112
113      static bool
114      eq_int_type(const int_type& __c1, const int_type& __c2)
115      { return __c1 == __c2; }
116
117      static int_type
118      eof() { return static_cast<int_type>(-1); }
119
120      static int_type
121      not_eof(const int_type& __c)
122      { return eq_int_type(__c, eof()) ? int_type(0) : __c; }
123    };
124} // namespace std
125
126void
127test01()
128{
129  bool test [[gnu::unused]] = true;
130
131  std::experimental::basic_string_view<A<B>> str02;
132  typedef std::experimental::basic_string_view< A<B> >::size_type size_type_o;
133  size_type_o sz03;
134  size_type_o sz04;
135
136  // non-POD types: size, length, max_size, empty()
137  bool b01 = str02.empty();
138  VERIFY( b01 == true );
139  sz03 = str02.size();
140  sz04 = str02.length();
141  VERIFY( sz03 == sz04 );
142  str02.data();
143  sz03 = str02.size();
144  sz04 = str02.length();
145  VERIFY( sz03 == sz04 );
146
147  sz03 = str02.max_size();
148  VERIFY( sz03 >= sz04 );
149
150  sz03 = str02.size();
151  str02 = {};
152  b01 = str02.empty();
153  VERIFY( b01 == true );
154  sz04 = str02.size();
155  VERIFY( sz03 >= sz04 );
156}
157
158int
159main()
160{
161  test01();
162
163  return 0;
164}
165