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Implement detection idiom toolkit

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Glen Fernandes committed 2018-01-28 09:40:24 -05:00
1 parent 5d5c651ea6
commit 35c105501b
21 files changed
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test/detected_or_test.cpp
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/*
Copyright 2017 Glen Joseph Fernandes
<glenjofe -at- gmail.com>
Distributed under the Boost Software License,
Version 1.0. (See accompanying file LICENSE_1_0.txt
or copy at http://www.boost.org/LICENSE_1_0.txt)
*/
#include <boost/config.hpp>
#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) && \
!defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
#ifdef TEST_STD
#include <type_traits>
#else
#include <boost/type_traits/detected_or.hpp>
#endif
#include "check_integral_constant.hpp"
#include "check_type.hpp"
#define CHECK_FALSE(e) BOOST_CHECK_INTEGRAL_CONSTANT(e, false)
#define CHECK_TRUE(e) BOOST_CHECK_INTEGRAL_CONSTANT(e, true)
template<class T>
using type_t = typename T::type;
struct has_type {
using type = char;
};
struct no_type { };
TT_TEST_BEGIN(detected_or)
CHECK_FALSE((::tt::detected_or<bool, type_t, int>::value_t::value));
CHECK_TRUE((::tt::detected_or<bool, type_t, has_type>::value_t::value));
CHECK_FALSE((::tt::detected_or<bool, type_t, no_type>::value_t::value));
BOOST_CHECK_TYPE4(::tt::detected_or<bool, type_t, int>::type, bool);
BOOST_CHECK_TYPE4(::tt::detected_or<bool, type_t, has_type>::type, char);
BOOST_CHECK_TYPE4(::tt::detected_or<bool, type_t, no_type>::type, bool);
BOOST_CHECK_TYPE4(::tt::detected_or_t<bool, type_t, int>, bool);
BOOST_CHECK_TYPE4(::tt::detected_or_t<bool, type_t, has_type>, char);
BOOST_CHECK_TYPE4(::tt::detected_or_t<bool, type_t, no_type>, bool);
TT_TEST_END
#else
int main()
{
return 0;
}
#endif
test/detected_test.cpp
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/*
Copyright 2017 Glen Joseph Fernandes
<glenjofe -at- gmail.com>
Distributed under the Boost Software License,
Version 1.0. (See accompanying file LICENSE_1_0.txt
or copy at http://www.boost.org/LICENSE_1_0.txt)
*/
#include <boost/config.hpp>
#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) && \
!defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
#ifdef TEST_STD
#include <type_traits>
#else
#include <boost/type_traits/detected.hpp>
#endif
#include "check_integral_constant.hpp"
#include "check_type.hpp"
#define CHECK_FALSE(e) BOOST_CHECK_INTEGRAL_CONSTANT(e, false)
#define CHECK_TRUE(e) BOOST_CHECK_INTEGRAL_CONSTANT(e, true)
template<class T>
using type_t = typename T::type;
struct has_type {
using type = char;
};
struct no_type { };
TT_TEST_BEGIN(detected)
BOOST_CHECK_TYPE3(::tt::detected_t<type_t, int>, boost::nonesuch);
BOOST_CHECK_TYPE3(::tt::detected_t<type_t, has_type>, char);
BOOST_CHECK_TYPE3(::tt::detected_t<type_t, no_type>, boost::nonesuch);
TT_TEST_END
#else
int main()
{
return 0;
}
#endif
test/is_detected_convertible.cpp
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/*
Copyright 2017-2018 Glen Joseph Fernandes
<glenjofe -at- gmail.com>
Distributed under the Boost Software License,
Version 1.0. (See accompanying file LICENSE_1_0.txt
or copy at http://www.boost.org/LICENSE_1_0.txt)
*/
#include <boost/config.hpp>
#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) && \
!defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
#ifdef TEST_STD
#include <type_traits>
#else
#include <boost/type_traits/is_detected_convertible.hpp>
#endif
#include "check_integral_constant.hpp"
#include "check_type.hpp"
#define CHECK_FALSE(e) BOOST_CHECK_INTEGRAL_CONSTANT(e, false)
#define CHECK_TRUE(e) BOOST_CHECK_INTEGRAL_CONSTANT(e, true)
template<class T>
using type_t = typename T::type;
struct has_type {
using type = char;
};
struct no_type { };
TT_TEST_BEGIN(is_detected_convertible)
CHECK_FALSE((::tt::is_detected_convertible<long, type_t, int>::value));
CHECK_TRUE((::tt::is_detected_convertible<long, type_t, has_type>::value));
CHECK_FALSE((::tt::is_detected_convertible<long, type_t, no_type>::value));
#ifndef BOOST_NO_CXX14_VARIABLE_TEMPLATES
CHECK_FALSE((::tt::is_detected_convertible_v<long, type_t, int>));
CHECK_TRUE((::tt::is_detected_convertible_v<long, type_t, has_type>));
CHECK_FALSE((::tt::is_detected_convertible_v<long, type_t, no_type>));
#endif
TT_TEST_END
#else
int main()
{
return 0;
}
#endif
test/is_detected_exact_test.cpp
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/*
Copyright 2017-2018 Glen Joseph Fernandes
<glenjofe -at- gmail.com>
Distributed under the Boost Software License,
Version 1.0. (See accompanying file LICENSE_1_0.txt
or copy at http://www.boost.org/LICENSE_1_0.txt)
*/
#include <boost/config.hpp>
#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) && \
!defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
#ifdef TEST_STD
#include <type_traits>
#else
#include <boost/type_traits/is_detected_exact.hpp>
#endif
#include "check_integral_constant.hpp"
#include "check_type.hpp"
#define CHECK_FALSE(e) BOOST_CHECK_INTEGRAL_CONSTANT(e, false)
#define CHECK_TRUE(e) BOOST_CHECK_INTEGRAL_CONSTANT(e, true)
template<class T>
using type_t = typename T::type;
struct has_type {
using type = char;
};
struct no_type { };
TT_TEST_BEGIN(is_detected_exact)
CHECK_FALSE((::tt::is_detected_exact<char, type_t, int>::value));
CHECK_TRUE((::tt::is_detected_exact<char, type_t, has_type>::value));
CHECK_FALSE((::tt::is_detected_exact<char, type_t, no_type>::value));
#ifndef BOOST_NO_CXX14_VARIABLE_TEMPLATES
CHECK_FALSE((::tt::is_detected_exact_v<char, type_t, int>));
CHECK_TRUE((::tt::is_detected_exact_v<char, type_t, has_type>));
CHECK_FALSE((::tt::is_detected_exact_v<char, type_t, no_type>));
#endif
TT_TEST_END
#else
int main()
{
return 0;
}
#endif
test/is_detected_test.cpp
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/*
Copyright 2017-2018 Glen Joseph Fernandes
<glenjofe -at- gmail.com>
Distributed under the Boost Software License,
Version 1.0. (See accompanying file LICENSE_1_0.txt
or copy at http://www.boost.org/LICENSE_1_0.txt)
*/
#include <boost/config.hpp>
#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) && \
!defined(BOOST_NO_CXX11_TEMPLATE_ALIASES)
#ifdef TEST_STD
#include <type_traits>
#else
#include <boost/type_traits/is_detected.hpp>
#endif
#include "check_integral_constant.hpp"
#include "check_type.hpp"
#define CHECK_FALSE(e) BOOST_CHECK_INTEGRAL_CONSTANT(e, false)
#define CHECK_TRUE(e) BOOST_CHECK_INTEGRAL_CONSTANT(e, true)
template<class T>
using type_t = typename T::type;
struct has_type {
using type = char;
};
struct no_type { };
TT_TEST_BEGIN(is_detected)
CHECK_FALSE((::tt::is_detected<type_t, int>::value));
CHECK_TRUE((::tt::is_detected<type_t, has_type>::value));
CHECK_FALSE((::tt::is_detected<type_t, no_type>::value));
#ifndef BOOST_NO_CXX14_VARIABLE_TEMPLATES
CHECK_FALSE((::tt::is_detected_v<type_t, int>));
CHECK_TRUE((::tt::is_detected_v<type_t, has_type>));
CHECK_FALSE((::tt::is_detected_v<type_t, no_type>));
#endif
TT_TEST_END
#else
int main()
{
return 0;
}
#endif