feedc0de/boost_mp11
1
0
Fork 0
forked from boostorg/mp11
Code Pull Requests Activity

Add support for value lists to mp_assign, mp_clear. Refs #53.

Browse Source
This commit is contained in:
Peter Dimov
2023-05-15 14:34:06 +03:00
parent bfa1bad608
commit 481755ce7c
4 changed files with 148 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
include/boost/mp11/list.hpp
View File

@@ -69,13 +69,35 @@ template<class L> using mp_empty = mp_bool< mp_size<L>::value == 0 >;
namespace detail
{
template<class L1, class L2> struct mp_assign_impl;
template<class L1, class L2> struct mp_assign_impl
{
// An error "no type named 'type'" here means that the arguments to mp_assign aren't lists
};
template<template<class...> class L1, class... T, template<class...> class L2, class... U> struct mp_assign_impl<L1<T...>, L2<U...>>
{
using type = L1<U...>;
};
#if defined(BOOST_MP11_HAS_TEMPLATE_AUTO)
template<template<auto...> class L1, auto... A, template<class...> class L2, class... U> struct mp_assign_impl<L1<A...>, L2<U...>>
{
using type = L1<U::value...>;
};
template<template<class...> class L1, class... T, template<auto...> class L2, auto... B> struct mp_assign_impl<L1<T...>, L2<B...>>
{
using type = L1<mp_value<B>...>;
};
template<template<auto...> class L1, auto... A, template<auto...> class L2, auto... B> struct mp_assign_impl<L1<A...>, L2<B...>>
{
using type = L1<B...>;
};
#endif
} // namespace detail
template<class L1, class L2> using mp_assign = typename detail::mp_assign_impl<L1, L2>::type;

6
test/Jamfile
View File

@@ -29,6 +29,10 @@ run mp_size.cpp ;
run mp_size_2.cpp ;
run mp_empty.cpp ;
run mp_empty_2.cpp ;
run mp_assign.cpp ;
run mp_assign_2.cpp ;
run mp_clear.cpp ;
run mp_clear_2.cpp ;
run mp_front.cpp ;
run mp_pop_front.cpp ;
run mp_second.cpp ;
@@ -54,8 +58,6 @@ run mp_list_v.cpp ;
run mp_rename_v.cpp ;
# algorithm
run mp_assign.cpp ;
run mp_clear.cpp ;
run mp_transform.cpp ;
run mp_transform_q.cpp ;
run mp_transform_sf.cpp ;

89
test/mp_assign_2.cpp Normal file
View File

@@ -0,0 +1,89 @@
// Copyright 2023 Peter Dimov
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#include <boost/mp11/list.hpp>
#if !defined(BOOST_MP11_HAS_TEMPLATE_AUTO)
#pragma message("Test skipped because BOOST_MP11_HAS_TEMPLATE_AUTO is not defined")
int main() {}
#else
#include <boost/mp11/integral.hpp>
#include <boost/core/lightweight_test_trait.hpp>
#include <utility>
template<auto... A> struct L1 {};
template<int... I> struct L2 {};
int main()
{
using boost::mp11::mp_list;
using boost::mp11::mp_list_v;
using boost::mp11::mp_assign;
using boost::mp11::mp_false;
using boost::mp11::mp_true;
using boost::mp11::mp_int;
//
BOOST_TEST_TRAIT_SAME(mp_assign<L1<>, mp_list_v<>>, L1<>);
BOOST_TEST_TRAIT_SAME(mp_assign<L1<>, mp_list_v<true>>, L1<true>);
BOOST_TEST_TRAIT_SAME(mp_assign<L1<>, mp_list_v<true, -4>>, L1<true, -4>);
BOOST_TEST_TRAIT_SAME(mp_assign<L1<false, 0>, mp_list_v<>>, L1<>);
BOOST_TEST_TRAIT_SAME(mp_assign<L1<false, 0>, mp_list_v<false>>, L1<false>);
BOOST_TEST_TRAIT_SAME(mp_assign<L1<false, 0>, mp_list_v<false, -4>>, L1<false, -4>);
//
BOOST_TEST_TRAIT_SAME(mp_assign<L1<>, L2<>>, L1<>);
BOOST_TEST_TRAIT_SAME(mp_assign<L1<>, L2<0>>, L1<0>);
BOOST_TEST_TRAIT_SAME(mp_assign<L1<>, L2<0, 1>>, L1<0, 1>);
BOOST_TEST_TRAIT_SAME(mp_assign<L1<false, 0>, L2<>>, L1<>);
BOOST_TEST_TRAIT_SAME(mp_assign<L1<false, 0>, L2<0>>, L1<0>);
BOOST_TEST_TRAIT_SAME(mp_assign<L1<false, 0>, L2<0, 1>>, L1<0, 1>);
//
BOOST_TEST_TRAIT_SAME(mp_assign<L2<>, L1<>>, L2<>);
BOOST_TEST_TRAIT_SAME(mp_assign<L2<>, L1<0>>, L2<0>);
BOOST_TEST_TRAIT_SAME(mp_assign<L2<>, L1<0, 1>>, L2<0, 1>);
BOOST_TEST_TRAIT_SAME(mp_assign<L2<1, 2>, L1<>>, L2<>);
BOOST_TEST_TRAIT_SAME(mp_assign<L2<1, 2>, L1<0>>, L2<0>);
BOOST_TEST_TRAIT_SAME(mp_assign<L2<1, 2>, L1<0, 1>>, L2<0, 1>);
//
BOOST_TEST_TRAIT_SAME(mp_assign<mp_list<>, mp_list_v<>>, mp_list<>);
BOOST_TEST_TRAIT_SAME(mp_assign<mp_list<>, mp_list_v<true>>, mp_list<mp_true>);
BOOST_TEST_TRAIT_SAME(mp_assign<mp_list<>, mp_list_v<true, -4>>, mp_list<mp_true, mp_int<-4>>);
BOOST_TEST_TRAIT_SAME(mp_assign<mp_list<void, float>, mp_list_v<>>, mp_list<>);
BOOST_TEST_TRAIT_SAME(mp_assign<mp_list<void, float>, mp_list_v<true>>, mp_list<mp_true>);
BOOST_TEST_TRAIT_SAME(mp_assign<mp_list<void, float>, mp_list_v<true, -4>>, mp_list<mp_true, mp_int<-4>>);
BOOST_TEST_TRAIT_SAME(mp_assign<std::pair<int, float>, mp_list_v<true, -4>>, std::pair<mp_true, mp_int<-4>>);
//
BOOST_TEST_TRAIT_SAME(mp_assign<mp_list_v<>, mp_list<>>, mp_list_v<>);
BOOST_TEST_TRAIT_SAME(mp_assign<mp_list_v<>, mp_list<mp_true>>, mp_list_v<true>);
BOOST_TEST_TRAIT_SAME(mp_assign<mp_list_v<>, mp_list<mp_true, mp_int<-4>>>, mp_list_v<true, -4>);
BOOST_TEST_TRAIT_SAME(mp_assign<mp_list_v<false, 0>, mp_list<>>, mp_list_v<>);
BOOST_TEST_TRAIT_SAME(mp_assign<mp_list_v<false, 0>, mp_list<mp_true>>, mp_list_v<true>);
BOOST_TEST_TRAIT_SAME(mp_assign<mp_list_v<false, 0>, mp_list<mp_true, mp_int<-4>>>, mp_list_v<true, -4>);
BOOST_TEST_TRAIT_SAME(mp_assign<mp_list_v<false, 0>, std::pair<mp_true, mp_int<-4>>>, mp_list_v<true, -4>);
//
return boost::report_errors();
}
#endif

32
test/mp_clear_2.cpp Normal file
View File

@@ -0,0 +1,32 @@
// Copyright 2023 Peter Dimov
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#include <boost/mp11/list.hpp>
#if !defined(BOOST_MP11_HAS_TEMPLATE_AUTO)
#pragma message("Test skipped because BOOST_MP11_HAS_TEMPLATE_AUTO is not defined")
int main() {}
#else
#include <boost/mp11/integral.hpp>
#include <boost/core/lightweight_test_trait.hpp>
template<auto... A> struct L1 {};
template<int... I> struct L2 {};
int main()
{
using boost::mp11::mp_list_v;
using boost::mp11::mp_clear;
BOOST_TEST_TRAIT_SAME(mp_clear<mp_list_v<false, true, 0, -4>>, mp_list_v<>);
BOOST_TEST_TRAIT_SAME(mp_clear<L1<false, true, 0, -4>>, L1<>);
BOOST_TEST_TRAIT_SAME(mp_clear<L2<0, 1, 2>>, L2<>);
return boost::report_errors();
}
#endif