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52 lines
1.4 KiB
C++
52 lines
1.4 KiB
C++
// Copyright 2022 Peter Dimov.
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// Distributed under the Boost Software License, Version 1.0.
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// https://www.boost.org/LICENSE_1_0.txt
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#include <boost/utility/string_view.hpp>
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#include <boost/core/detail/string_view.hpp>
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#include <boost/container_hash/hash.hpp>
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#include <boost/core/lightweight_test.hpp>
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#include <boost/config.hpp>
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#include <string>
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#if !defined(BOOST_NO_CXX17_HDR_STRING_VIEW)
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#include <string_view>
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#endif
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#include <vector>
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#include <deque>
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#include <list>
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#if !defined(BOOST_NO_CXX11_HDR_FORWARD_LIST)
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# include <forward_list>
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#endif
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// Test whether the hash values of a string and a
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// string_view that refers to it match. This is
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// important for unordered heterogeneous lookups.
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template<class T> std::size_t hv( T const& t )
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{
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return boost::hash<T>()( t );
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}
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int main()
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{
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std::string s( "Test." );
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std::size_t h0 = hv( s );
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BOOST_TEST_EQ( h0, hv( boost::string_view( s ) ) );
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BOOST_TEST_EQ( h0, hv( boost::core::string_view( s ) ) );
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#if !defined(BOOST_NO_CXX17_HDR_STRING_VIEW)
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BOOST_TEST_EQ( h0, hv( std::string_view( s ) ) );
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#endif
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BOOST_TEST_EQ( h0, hv( std::vector<char>( s.begin(), s.end() ) ) );
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BOOST_TEST_EQ( h0, hv( std::deque<char>( s.begin(), s.end() ) ) );
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BOOST_TEST_EQ( h0, hv( std::list<char>( s.begin(), s.end() ) ) );
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#if !defined(BOOST_NO_CXX11_HDR_FORWARD_LIST)
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BOOST_TEST_EQ( h0, hv( std::forward_list<char>( s.begin(), s.end() ) ) );
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#endif
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return boost::report_errors();
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}
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