122 lines
3.5 KiB
C++
Executable File
122 lines
3.5 KiB
C++
Executable File
// (C) Copyright Gennadiy Rozental 2001.
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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// See http://www.boost.org/libs/test for the library home page.
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//
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/// @file
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/// Defines single element monomorphic dataset
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// ***************************************************************************
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#ifndef BOOST_TEST_DATA_MONOMORPHIC_SINGLETON_HPP_102211GER
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#define BOOST_TEST_DATA_MONOMORPHIC_SINGLETON_HPP_102211GER
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// Boost.Test
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#include <boost/test/data/config.hpp>
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#include <boost/test/data/monomorphic/fwd.hpp>
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#include <boost/test/detail/suppress_warnings.hpp>
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//____________________________________________________________________________//
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namespace boost {
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namespace unit_test {
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namespace data {
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namespace monomorphic {
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// ************************************************************************** //
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// ************** singleton ************** //
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// ************************************************************************** //
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/// Models a single element data set
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template<typename T>
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class singleton {
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private:
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typedef typename boost::decay<T>::type sample;
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public:
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static const int arity = 1;
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struct iterator {
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// Constructor
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explicit iterator( singleton<T> const* owner )
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: m_owner( owner )
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{}
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// forward iterator interface
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sample const& operator*() const { return m_owner->value(); }
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void operator++() {}
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private:
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singleton<T> const* m_owner;
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};
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//! Constructor
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explicit singleton( T&& value ) : m_value( std::forward<T>( value ) ) {}
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//! Move constructor
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singleton( singleton&& s ) : m_value( std::forward<T>( s.m_value ) ) {}
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//! Value access method
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T const& value() const { return m_value; }
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//! dataset interface
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data::size_t size() const { return 1; }
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iterator begin() const { return iterator( this ); }
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private:
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// Data members
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T m_value;
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};
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//____________________________________________________________________________//
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// a singleton is a dataset
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template<typename T>
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struct is_dataset<singleton<T>> : mpl::true_ {};
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//____________________________________________________________________________//
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} // namespace monomorphic
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/// @overload boost::unit_test::data::make()
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template<typename T>
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inline typename std::enable_if<!is_container_forward_iterable<T>::value &&
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!monomorphic::is_dataset<T>::value &&
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!boost::is_array<typename boost::remove_reference<T>::type>::value,
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monomorphic::singleton<T>
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>::type
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make( T&& v )
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{
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return monomorphic::singleton<T>( std::forward<T>( v ) );
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}
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//____________________________________________________________________________//
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/// @overload boost::unit_test::data::make
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inline monomorphic::singleton<char*>
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make( char* str )
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{
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return monomorphic::singleton<char*>( std::move(str) );
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}
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//____________________________________________________________________________//
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/// @overload boost::unit_test::data::make
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inline monomorphic::singleton<char const*>
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make( char const* str )
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{
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return monomorphic::singleton<char const*>( std::move(str) );
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}
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} // namespace data
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} // namespace unit_test
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} // namespace boost
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#include <boost/test/detail/enable_warnings.hpp>
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#endif // BOOST_TEST_DATA_MONOMORPHIC_SINGLETON_HPP_102211GER
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