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1 //===----------------------------------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 // <string>
11 
12 // template<class charT, class traits, class Allocator>
13 //   basic_string<charT,traits,Allocator>
14 //   operator+(const charT* lhs, const basic_string<charT,traits,Allocator>& rhs);
15 
16 // template<class charT, class traits, class Allocator>
17 //   basic_string<charT,traits,Allocator>&&
18 //   operator+(const charT* lhs, basic_string<charT,traits,Allocator>&& rhs);
19 
20 #include <string>
21 #include <cassert>
22 
23 #include "min_allocator.h"
24 
25 template <class S>
26 void
test0(const typename S::value_type * lhs,const S & rhs,const S & x)27 test0(const typename S::value_type* lhs, const S& rhs, const S& x)
28 {
29     assert(lhs + rhs == x);
30 }
31 
32 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
33 
34 template <class S>
35 void
test1(const typename S::value_type * lhs,S && rhs,const S & x)36 test1(const typename S::value_type* lhs, S&& rhs, const S& x)
37 {
38     assert(lhs + move(rhs) == x);
39 }
40 
41 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
42 
main()43 int main()
44 {
45     {
46     typedef std::string S;
47     test0("", S(""), S(""));
48     test0("", S("12345"), S("12345"));
49     test0("", S("1234567890"), S("1234567890"));
50     test0("", S("12345678901234567890"), S("12345678901234567890"));
51     test0("abcde", S(""), S("abcde"));
52     test0("abcde", S("12345"), S("abcde12345"));
53     test0("abcde", S("1234567890"), S("abcde1234567890"));
54     test0("abcde", S("12345678901234567890"), S("abcde12345678901234567890"));
55     test0("abcdefghij", S(""), S("abcdefghij"));
56     test0("abcdefghij", S("12345"), S("abcdefghij12345"));
57     test0("abcdefghij", S("1234567890"), S("abcdefghij1234567890"));
58     test0("abcdefghij", S("12345678901234567890"), S("abcdefghij12345678901234567890"));
59     test0("abcdefghijklmnopqrst", S(""), S("abcdefghijklmnopqrst"));
60     test0("abcdefghijklmnopqrst", S("12345"), S("abcdefghijklmnopqrst12345"));
61     test0("abcdefghijklmnopqrst", S("1234567890"), S("abcdefghijklmnopqrst1234567890"));
62     test0("abcdefghijklmnopqrst", S("12345678901234567890"), S("abcdefghijklmnopqrst12345678901234567890"));
63 
64 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
65 
66     test1("", S(""), S(""));
67     test1("", S("12345"), S("12345"));
68     test1("", S("1234567890"), S("1234567890"));
69     test1("", S("12345678901234567890"), S("12345678901234567890"));
70     test1("abcde", S(""), S("abcde"));
71     test1("abcde", S("12345"), S("abcde12345"));
72     test1("abcde", S("1234567890"), S("abcde1234567890"));
73     test1("abcde", S("12345678901234567890"), S("abcde12345678901234567890"));
74     test1("abcdefghij", S(""), S("abcdefghij"));
75     test1("abcdefghij", S("12345"), S("abcdefghij12345"));
76     test1("abcdefghij", S("1234567890"), S("abcdefghij1234567890"));
77     test1("abcdefghij", S("12345678901234567890"), S("abcdefghij12345678901234567890"));
78     test1("abcdefghijklmnopqrst", S(""), S("abcdefghijklmnopqrst"));
79     test1("abcdefghijklmnopqrst", S("12345"), S("abcdefghijklmnopqrst12345"));
80     test1("abcdefghijklmnopqrst", S("1234567890"), S("abcdefghijklmnopqrst1234567890"));
81     test1("abcdefghijklmnopqrst", S("12345678901234567890"), S("abcdefghijklmnopqrst12345678901234567890"));
82 
83 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
84     }
85 #if __cplusplus >= 201103L
86     {
87     typedef std::basic_string<char, std::char_traits<char>, min_allocator<char>> S;
88     test0("", S(""), S(""));
89     test0("", S("12345"), S("12345"));
90     test0("", S("1234567890"), S("1234567890"));
91     test0("", S("12345678901234567890"), S("12345678901234567890"));
92     test0("abcde", S(""), S("abcde"));
93     test0("abcde", S("12345"), S("abcde12345"));
94     test0("abcde", S("1234567890"), S("abcde1234567890"));
95     test0("abcde", S("12345678901234567890"), S("abcde12345678901234567890"));
96     test0("abcdefghij", S(""), S("abcdefghij"));
97     test0("abcdefghij", S("12345"), S("abcdefghij12345"));
98     test0("abcdefghij", S("1234567890"), S("abcdefghij1234567890"));
99     test0("abcdefghij", S("12345678901234567890"), S("abcdefghij12345678901234567890"));
100     test0("abcdefghijklmnopqrst", S(""), S("abcdefghijklmnopqrst"));
101     test0("abcdefghijklmnopqrst", S("12345"), S("abcdefghijklmnopqrst12345"));
102     test0("abcdefghijklmnopqrst", S("1234567890"), S("abcdefghijklmnopqrst1234567890"));
103     test0("abcdefghijklmnopqrst", S("12345678901234567890"), S("abcdefghijklmnopqrst12345678901234567890"));
104 
105 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
106 
107     test1("", S(""), S(""));
108     test1("", S("12345"), S("12345"));
109     test1("", S("1234567890"), S("1234567890"));
110     test1("", S("12345678901234567890"), S("12345678901234567890"));
111     test1("abcde", S(""), S("abcde"));
112     test1("abcde", S("12345"), S("abcde12345"));
113     test1("abcde", S("1234567890"), S("abcde1234567890"));
114     test1("abcde", S("12345678901234567890"), S("abcde12345678901234567890"));
115     test1("abcdefghij", S(""), S("abcdefghij"));
116     test1("abcdefghij", S("12345"), S("abcdefghij12345"));
117     test1("abcdefghij", S("1234567890"), S("abcdefghij1234567890"));
118     test1("abcdefghij", S("12345678901234567890"), S("abcdefghij12345678901234567890"));
119     test1("abcdefghijklmnopqrst", S(""), S("abcdefghijklmnopqrst"));
120     test1("abcdefghijklmnopqrst", S("12345"), S("abcdefghijklmnopqrst12345"));
121     test1("abcdefghijklmnopqrst", S("1234567890"), S("abcdefghijklmnopqrst1234567890"));
122     test1("abcdefghijklmnopqrst", S("12345678901234567890"), S("abcdefghijklmnopqrst12345678901234567890"));
123 
124 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
125     }
126 #endif
127 }
128