4684ddb6aa
- import libcxx - reduce targets to the one when compiled as a tools Change-Id: Iabb8427f80ff8e89463559a28bcb8b4f2bdbc496
48 lines
1.1 KiB
C++
48 lines
1.1 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// <functional>
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// template <class T>
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// struct hash
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// : public unary_function<T, size_t>
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// {
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// size_t operator()(T val) const;
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// };
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// Not very portable
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#include <string>
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#include <cassert>
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#include <type_traits>
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template <class T>
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void
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test()
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{
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typedef std::hash<T> H;
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static_assert((std::is_base_of<std::unary_function<T, std::size_t>,
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H>::value), "");
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H h;
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std::string g1 = "1234567890";
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std::string g2 = "1234567891";
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T s1(g1.begin(), g1.end());
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T s2(g2.begin(), g2.end());
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assert(h(s1) != h(s2));
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}
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int main()
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{
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test<std::string>();
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#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
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test<std::u16string>();
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test<std::u32string>();
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#endif // _LIBCPP_HAS_NO_UNICODE_CHARS
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test<std::wstring>();
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}
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