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Unroll mp_reverse a bit more.

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Peter Dimov
2017-03-24 16:55:06 +02:00
parent c1485d5d51
commit 2bf9bad934
2 changed files with 54 additions and 3 deletions
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24
include/boost/mp11/algorithm.hpp
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@@ -701,9 +701,29 @@ template<template<class...> class L, class T1, class T2, class T3, class T4, cla
using type = L<T5, T4, T3, T2, T1>;
};
template<template<class...> class L, class T1, class T2, class T3, class T4, class T5, class T6, class... T> struct mp_reverse_impl<L<T1, T2, T3, T4, T5, T6, T...>>
template<template<class...> class L, class T1, class T2, class T3, class T4, class T5, class T6> struct mp_reverse_impl<L<T1, T2, T3, T4, T5, T6>>
{
using type = mp_push_back<typename mp_reverse_impl<L<T...>>::type, T6, T5, T4, T3, T2, T1>;
using type = L<T6, T5, T4, T3, T2, T1>;
};
template<template<class...> class L, class T1, class T2, class T3, class T4, class T5, class T6, class T7> struct mp_reverse_impl<L<T1, T2, T3, T4, T5, T6, T7>>
{
using type = L<T7, T6, T5, T4, T3, T2, T1>;
};
template<template<class...> class L, class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8> struct mp_reverse_impl<L<T1, T2, T3, T4, T5, T6, T7, T8>>
{
using type = L<T8, T7, T6, T5, T4, T3, T2, T1>;
};
template<template<class...> class L, class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8, class T9> struct mp_reverse_impl<L<T1, T2, T3, T4, T5, T6, T7, T8, T9>>
{
using type = L<T9, T8, T7, T6, T5, T4, T3, T2, T1>;
};
template<template<class...> class L, class T1, class T2, class T3, class T4, class T5, class T6, class T7, class T8, class T9, class T10, class... T> struct mp_reverse_impl<L<T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T...>>
{
using type = mp_push_back<typename mp_reverse_impl<L<T...>>::type, T10, T9, T8, T7, T6, T5, T4, T3, T2, T1>;
};
} // namespace detail

33
test/mp_reverse.cpp
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@@ -1,5 +1,5 @@
// Copyright 2015 Peter Dimov.
// Copyright 2015-2017 Peter Dimov.
//
// Distributed under the Boost Software License, Version 1.0.
//
@@ -9,6 +9,7 @@
#include <boost/mp11/algorithm.hpp>
#include <boost/mp11/list.hpp>
#include <boost/mp11/integral.hpp>
#include <boost/core/lightweight_test_trait.hpp>
#include <type_traits>
#include <tuple>
@@ -22,6 +23,9 @@ struct X6 {};
struct X7 {};
struct X8 {};
struct X9 {};
struct X10 {};
struct X11 {};
struct X12 {};
int main()
{
@@ -39,6 +43,9 @@ int main()
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_reverse<mp_list<X1, X2, X3, X4, X5, X6, X7>>, mp_list<X7, X6, X5, X4, X3, X2, X1>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_reverse<mp_list<X1, X2, X3, X4, X5, X6, X7, X8>>, mp_list<X8, X7, X6, X5, X4, X3, X2, X1>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_reverse<mp_list<X1, X2, X3, X4, X5, X6, X7, X8, X9>>, mp_list<X9, X8, X7, X6, X5, X4, X3, X2, X1>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_reverse<mp_list<X1, X2, X3, X4, X5, X6, X7, X8, X9, X10>>, mp_list<X10, X9, X8, X7, X6, X5, X4, X3, X2, X1>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_reverse<mp_list<X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11>>, mp_list<X11, X10, X9, X8, X7, X6, X5, X4, X3, X2, X1>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_reverse<mp_list<X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12>>, mp_list<X12, X11, X10, X9, X8, X7, X6, X5, X4, X3, X2, X1>>));
}
{
@@ -52,11 +59,35 @@ int main()
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_reverse<std::tuple<X1, X2, X3, X4, X5, X6, X7>>, std::tuple<X7, X6, X5, X4, X3, X2, X1>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_reverse<std::tuple<X1, X2, X3, X4, X5, X6, X7, X8>>, std::tuple<X8, X7, X6, X5, X4, X3, X2, X1>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_reverse<std::tuple<X1, X2, X3, X4, X5, X6, X7, X8, X9>>, std::tuple<X9, X8, X7, X6, X5, X4, X3, X2, X1>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_reverse<std::tuple<X1, X2, X3, X4, X5, X6, X7, X8, X9, X10>>, std::tuple<X10, X9, X8, X7, X6, X5, X4, X3, X2, X1>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_reverse<std::tuple<X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11>>, std::tuple<X11, X10, X9, X8, X7, X6, X5, X4, X3, X2, X1>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_reverse<std::tuple<X1, X2, X3, X4, X5, X6, X7, X8, X9, X10, X11, X12>>, std::tuple<X12, X11, X10, X9, X8, X7, X6, X5, X4, X3, X2, X1>>));
}
{
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_reverse<std::pair<X1, X2>>, std::pair<X2, X1>>));
}
using boost::mp11::mp_iota_c;
using boost::mp11::mp_size_t;
using boost::mp11::mp_transform;
using boost::mp11::mp_plus;
using boost::mp11::mp_fill;
{
int const N = 37;
using L = mp_iota_c<N>;
using R1 = mp_reverse<L>;
using R2 = mp_reverse<R1>;
BOOST_TEST_TRAIT_TRUE((std::is_same<R2, L>));
using R3 = mp_transform<mp_plus, R1, R2>;
BOOST_TEST_TRAIT_TRUE((std::is_same<R3, mp_fill<L, mp_size_t<N-1>>>));
}
return boost::report_errors();
}