| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: c++98, c++03 |
| |
| // <string> |
| |
| // Test that hash specializations for <string> require "char_traits<_CharT>" not just any "_Trait". |
| |
| #include <string> |
| |
| template <class _CharT> |
| struct trait // copied from <__string> |
| { |
| typedef _CharT char_type; |
| typedef int int_type; |
| typedef std::streamoff off_type; |
| typedef std::streampos pos_type; |
| typedef std::mbstate_t state_type; |
| |
| static inline void assign(char_type& __c1, const char_type& __c2) { |
| __c1 = __c2; |
| } |
| static inline bool eq(char_type __c1, char_type __c2) { return __c1 == __c2; } |
| static inline bool lt(char_type __c1, char_type __c2) { return __c1 < __c2; } |
| |
| static int compare(const char_type* __s1, const char_type* __s2, size_t __n); |
| static size_t length(const char_type* __s); |
| static const char_type* find(const char_type* __s, size_t __n, |
| const char_type& __a); |
| |
| static char_type* move(char_type* __s1, const char_type* __s2, size_t __n); |
| static char_type* copy(char_type* __s1, const char_type* __s2, size_t __n); |
| static char_type* assign(char_type* __s, size_t __n, char_type __a); |
| |
| static inline int_type not_eof(int_type __c) { |
| return eq_int_type(__c, eof()) ? ~eof() : __c; |
| } |
| static inline char_type to_char_type(int_type __c) { return char_type(__c); } |
| static inline int_type to_int_type(char_type __c) { return int_type(__c); } |
| static inline bool eq_int_type(int_type __c1, int_type __c2) { |
| return __c1 == __c2; |
| } |
| static inline int_type eof() { return int_type(EOF); } |
| }; |
| |
| template <class CharT> |
| void test() { |
| typedef std::basic_string<CharT, trait<CharT> > str_t; |
| std::hash<str_t> |
| h; // expected-error-re 4 {{{{call to implicitly-deleted default constructor of 'std::hash<str_t>'|implicit instantiation of undefined template}} {{.+}}}}}} |
| } |
| |
| int main(int, char**) { |
| test<char>(); |
| test<wchar_t>(); |
| test<char16_t>(); |
| test<char32_t>(); |
| |
| return 0; |
| } |