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Add a 'from' parameter to mp_iota, mp_iota_c. Refs #78.

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This commit is contained in:
Peter Dimov
2023-05-14 03:49:28 +03:00
parent b7da04c594
commit 99070f7f5c
3 changed files with 41 additions and 3 deletions
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6
include/boost/mp11/algorithm.hpp
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@@ -323,9 +323,9 @@ template<template<class T, T... I> class S, class U, U... J, class F> struct mp_
template<class S, class F = mp_int<0>> using mp_from_sequence = typename detail::mp_from_sequence_impl<S, F>::type;
// mp_iota(_c)<N>
template<std::size_t N> using mp_iota_c = mp_from_sequence<make_index_sequence<N>>;
template<class N> using mp_iota = mp_from_sequence<make_integer_sequence<typename std::remove_const<decltype(N::value)>::type, N::value>>;
// mp_iota(_c)<N, F>
template<std::size_t N, std::size_t F = 0> using mp_iota_c = mp_from_sequence<make_index_sequence<N>, mp_size_t<F>>;
template<class N, class F = mp_int<0>> using mp_iota = mp_from_sequence<make_integer_sequence<typename std::remove_const<decltype(N::value)>::type, N::value>, F>;
// mp_at(_c)<L, I>
namespace detail

1
test/Jamfile
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@@ -68,6 +68,7 @@ run mp_repeat.cpp ;
run mp_product.cpp ;
run mp_drop.cpp ;
run mp_iota.cpp ;
run mp_iota_2.cpp ;
run mp_at.cpp ;
run mp_at_sf.cpp : : : <toolset>gcc-4.7:<warnings>all ;
run mp_take.cpp ;

37
test/mp_iota_2.cpp Normal file
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@@ -0,0 +1,37 @@
// Copyright 2015, 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/core/lightweight_test_trait.hpp>
#include <type_traits>
int main()
{
using boost::mp11::mp_list;
using boost::mp11::mp_iota;
using boost::mp11::mp_iota_c;
using boost::mp11::mp_int;
using boost::mp11::mp_size_t;
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_iota_c<0, 7>, mp_list<>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_iota_c<1, 7>, mp_list<mp_size_t<7>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_iota_c<2, 7>, mp_list<mp_size_t<7>, mp_size_t<8>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_iota_c<3, 7>, mp_list<mp_size_t<7>, mp_size_t<8>, mp_size_t<9>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_iota_c<4, 7>, mp_list<mp_size_t<7>, mp_size_t<8>, mp_size_t<9>, mp_size_t<10>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_iota<mp_size_t<0>, mp_int<4>>, mp_list<>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_iota<mp_size_t<1>, mp_int<4>>, mp_list<mp_size_t<4>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_iota<mp_size_t<2>, mp_int<4>>, mp_list<mp_size_t<4>, mp_size_t<5>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_iota<mp_size_t<3>, mp_int<4>>, mp_list<mp_size_t<4>, mp_size_t<5>, mp_size_t<6>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_iota<mp_size_t<4>, mp_int<4>>, mp_list<mp_size_t<4>, mp_size_t<5>, mp_size_t<6>, mp_size_t<7>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_iota<mp_int<0>, mp_int<-2>>, mp_list<>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_iota<mp_int<1>, mp_int<-2>>, mp_list<mp_int<-2>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_iota<mp_int<2>, mp_int<-2>>, mp_list<mp_int<-2>, mp_int<-1>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_iota<mp_int<3>, mp_int<-2>>, mp_list<mp_int<-2>, mp_int<-1>, mp_int<0>>>));
BOOST_TEST_TRAIT_TRUE((std::is_same<mp_iota<mp_int<4>, mp_int<-2>>, mp_list<mp_int<-2>, mp_int<-1>, mp_int<0>, mp_int<+1>>>));
return boost::report_errors();
}