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Add an offset parameter to mp_from_sequence

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Peter Dimov
2023-05-14 03:39:39 +03:00
parent 773ec9b8b2
commit b7da04c594
3 changed files with 51 additions and 5 deletions
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test/mp_from_sequence_2.cpp Normal file
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// Copyright 2017, 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>
#include <boost/mp11/integer_sequence.hpp>
#include <boost/core/lightweight_test_trait.hpp>
#include <type_traits>
template<class T, T... I> struct S;
template<char Ch> using mp_char = std::integral_constant<char, Ch>;
int main()
{
using boost::mp11::mp_list;
using boost::mp11::mp_list_c;
using boost::mp11::mp_from_sequence;
using boost::mp11::mp_int;
using boost::mp11::mp_size_t;
using boost::mp11::make_integer_sequence;
using boost::mp11::make_index_sequence;
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<S<int>, mp_int<-3>>, mp_list<>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<S<int, 1>, mp_int<-3>>, mp_list<mp_int<-2>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<S<int, 1, 3>, mp_int<-3>>, mp_list<mp_int<-2>, mp_int<0>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<S<int, 1, 3, 5>, mp_int<-3>>, mp_list<mp_int<-2>, mp_int<0>, mp_int<+2>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<S<char, 0, 3, 7>, mp_int<'0'>>, mp_list_c<char, '0', '3', '7'>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<make_integer_sequence<int, 0>, mp_int<-3>>, mp_list<>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<make_integer_sequence<int, 1>, mp_int<-3>>, mp_list<mp_int<-3>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<make_integer_sequence<int, 2>, mp_int<-3>>, mp_list<mp_int<-3>, mp_int<-2>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<make_integer_sequence<int, 3>, mp_int<-3>>, mp_list<mp_int<-3>, mp_int<-2>, mp_int<-1>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<make_integer_sequence<char, 5>, mp_size_t<'0'>>, mp_list_c<char, '0', '1', '2', '3', '4'>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<make_index_sequence<0>, mp_int<4>>, mp_list<>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<make_index_sequence<1>, mp_int<4>>, mp_list<mp_size_t<4>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<make_index_sequence<2>, mp_int<4>>, mp_list<mp_size_t<4>, mp_size_t<5>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_from_sequence<make_index_sequence<3>, mp_int<4>>, mp_list<mp_size_t<4>, mp_size_t<5>, mp_size_t<6>>>));
return boost::report_errors();
}