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

Add value list support to mp_fill. Refs #53.

Browse Source
This commit is contained in:
Peter Dimov
2023-05-16 18:34:16 +03:00
parent 3f8a53ac89
commit 799c2e6079
3 changed files with 54 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
include/boost/mp11/algorithm.hpp
View File

@@ -199,7 +199,10 @@ template<class Q, class... L> using mp_filter_q = typename detail::mp_filter_imp
namespace detail
{
template<class L, class V> struct mp_fill_impl;
template<class L, class V> struct mp_fill_impl
{
// An error "no type named 'type'" here means that the L argument of mp_fill is not a list
};
template<template<class...> class L, class... T, class V> struct mp_fill_impl<L<T...>, V>
{
@@ -216,6 +219,15 @@ template<template<class...> class L, class... T, class V> struct mp_fill_impl<L<
#endif
};
#if defined(BOOST_MP11_HAS_TEMPLATE_AUTO)
template<template<auto...> class L, auto... A, class V> struct mp_fill_impl<L<A...>, V>
{
using type = L<((void)A, V::value)...>;
};
#endif
} // namespace detail
template<class L, class V> using mp_fill = typename detail::mp_fill_impl<L, V>::type;

1
test/Jamfile
View File

@@ -79,6 +79,7 @@ run mp_transform_if.cpp ;
run mp_transform_if_q.cpp ;
run mp_filter.cpp ;
run mp_fill.cpp ;
run mp_fill_2.cpp ;
run mp_count.cpp ;
run mp_count_if.cpp ;
run mp_count_if_q.cpp ;

40
test/mp_fill_2.cpp Normal file
View File

@@ -0,0 +1,40 @@
// Copyright 2023 Peter Dimov
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#include <boost/mp11/algorithm.hpp>
#include <boost/mp11/integral.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/core/lightweight_test_trait.hpp>
template<auto... A> struct V1 {};
template<int... I> struct V2 {};
int main()
{
using boost::mp11::mp_fill;
using boost::mp11::mp_int;
BOOST_TEST_TRAIT_SAME(mp_fill<V1<>, mp_int<-1>>, V1<>);
BOOST_TEST_TRAIT_SAME(mp_fill<V1<false>, mp_int<-1>>, V1<-1>);
BOOST_TEST_TRAIT_SAME(mp_fill<V1<false, 0>, mp_int<-1>>, V1<-1, -1>);
BOOST_TEST_TRAIT_SAME(mp_fill<V1<false, 0, true>, mp_int<-1>>, V1<-1, -1, -1>);
BOOST_TEST_TRAIT_SAME(mp_fill<V1<false, 0, true, std::size_t(1)>, mp_int<-1>>, V1<-1, -1, -1, -1>);
BOOST_TEST_TRAIT_SAME(mp_fill<V2<>, mp_int<-1>>, V2<>);
BOOST_TEST_TRAIT_SAME(mp_fill<V2<0>, mp_int<-1>>, V2<-1>);
BOOST_TEST_TRAIT_SAME(mp_fill<V2<0, 1>, mp_int<-1>>, V2<-1, -1>);
BOOST_TEST_TRAIT_SAME(mp_fill<V2<0, 1, 2>, mp_int<-1>>, V2<-1, -1, -1>);
BOOST_TEST_TRAIT_SAME(mp_fill<V2<0, 1, 2, 3>, mp_int<-1>>, V2<-1, -1, -1, -1>);
return boost::report_errors();
}
#endif