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Merge branch 'develop'

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This commit is contained in:
Peter Dimov
2015-08-16 14:51:30 +03:00
parent 9854377529 6af4bbc113
commit 17c8c515de
6 changed files with 93 additions and 36 deletions
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41
include/boost/mp11/utility.hpp
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@@ -19,6 +19,9 @@ template<class T> struct mp_identity
using type = T;
};
// mp_identity_t
template<class T> using mp_identity_t = T;
// mp_inherit
template<class... T> struct mp_inherit: T... {};
@@ -82,13 +85,45 @@ template<template<class...> class F, class... T> struct mp_valid_impl
template<template<class...> class F, class... T> using mp_valid = typename detail::mp_valid_impl<F, T...>::type;
// mp_defer
template<template<class...> class F, class... T> struct mp_defer
namespace detail
{
template<template<class...> class F, class... T> struct mp_defer_impl
{
using type = F<T...>;
};
// mp_defer_if_valid
template<template<class...> class F, class... T> using mp_defer_if_valid = mp_if<mp_valid<F, T...>, mp_defer<F, T...>, mp_inherit<>>;
struct mp_no_type
{
};
} // namespace detail
template<template<class...> class F, class... T> using mp_defer = mp_if<mp_valid<F, T...>, detail::mp_defer_impl<F, T...>, detail::mp_no_type>;
// mp_quote
template<template<class...> class F> struct mp_quote
{
template<class... T> using apply = F<T...>;
};
// mp_unquote
namespace detail
{
template<class Q, class... T> struct mp_unquote_impl
{
using type = typename Q::template apply<T...>;
};
template<template<class...> class F, class... T> struct mp_unquote_impl<mp_quote<F>, T...>
{
using type = F<T...>;
};
} // namespace detail
template<class Q, class... T> using mp_unquote = typename detail::mp_unquote_impl<Q, T...>::type;
} // namespace boost

2
test/Jamfile.v2
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@@ -66,7 +66,7 @@ run mp_if.cpp : : : $(REQ) ;
run mp_eval_if.cpp : : : $(REQ) ;
run mp_valid.cpp : : : $(REQ) ;
run mp_defer.cpp : : : $(REQ) ;
run mp_defer_if_valid.cpp : : : $(REQ) ;
run mp_quote.cpp : : : $(REQ) ;
# integer_sequence
run integer_sequence.cpp : : : $(REQ) ;

20
test/mp_defer.cpp
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@@ -8,19 +8,35 @@
#include <boost/mp11/utility.hpp>
#include <boost/mp11/integral.hpp>
#include <boost/core/lightweight_test_trait.hpp>
#include <type_traits>
template<class T> using add_pointer = T*;
template<class T> struct has_type
{
template<class U> static boost::mp_true f( boost::mp_identity<typename U::type>* );
template<class U> static boost::mp_false f( ... );
using type = decltype( f<T>(0) );
static const auto value = type::value;
};
using boost::mp_defer;
template<class T> using add_pointer_impl = mp_defer<add_pointer, T>;
template<class T> using add_pointer = T*;
template<class... T> using add_pointer_impl = mp_defer<add_pointer, T...>;
int main()
{
BOOST_TEST_TRAIT_TRUE((has_type<add_pointer_impl<void>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<add_pointer_impl<void>::type, void*>));
BOOST_TEST_TRAIT_TRUE((has_type<add_pointer_impl<int>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<add_pointer_impl<int>::type, int*>));
BOOST_TEST_TRAIT_FALSE((has_type<add_pointer_impl<>>));
BOOST_TEST_TRAIT_FALSE((has_type<add_pointer_impl<void, void>>));
return boost::report_errors();
}

29
test/mp_defer_if_valid.cpp
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@@ -1,29 +0,0 @@
// Copyright 2015 Peter Dimov.
//
// 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/mp11/utility.hpp>
#include <boost/core/lightweight_test_trait.hpp>
#include <type_traits>
using boost::mp_defer_if_valid;
using boost::mp_identity;
template<class... T> using mp_identity_2 = typename mp_defer_if_valid<mp_identity, T...>::type;
int main()
{
using boost::mp_valid;
BOOST_TEST_TRAIT_FALSE((mp_valid<mp_identity_2>));
BOOST_TEST_TRAIT_TRUE((mp_valid<mp_identity_2, void>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_identity_2<void>, mp_identity<void>>));
BOOST_TEST_TRAIT_FALSE((mp_valid<mp_identity_2, void, void>));
return boost::report_errors();
}

9
test/mp_identity.cpp
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@@ -7,8 +7,8 @@
// http://www.boost.org/LICENSE_1_0.txt
#include <boost/core/lightweight_test_trait.hpp>
#include <boost/mp11/utility.hpp>
#include <boost/core/lightweight_test_trait.hpp>
#include <type_traits>
struct X {};
@@ -22,5 +22,12 @@ int main()
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_identity<int const[]>::type, int const[]>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_identity<X>::type, X>));
using boost::mp_identity_t;
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_identity_t<void const volatile>, void const volatile>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_identity_t<void()>, void()>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_identity_t<int const[]>, int const[]>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_identity_t<X>, X>));
return boost::report_errors();
}

28
test/mp_quote.cpp Normal file
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@@ -0,0 +1,28 @@
// Copyright 2015 Peter Dimov.
//
// 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/mp11/utility.hpp>
#include <boost/core/lightweight_test_trait.hpp>
#include <type_traits>
struct X {};
int main()
{
using boost::mp_identity_t;
using boost::mp_quote;
using boost::mp_unquote;
using Q = mp_quote<mp_identity_t>;
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_unquote<Q, void>, void>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_unquote<Q, int[]>, int[]>));
return boost::report_errors();
}