construct.cpp
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/*=============================================================================
Copyright (c) 2017 Paul Fultz II
construct.cpp
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
==============================================================================*/
#include <boost/hof/construct.hpp>
#include "test.hpp"
#include <boost/hof/first_of.hpp>
#include <boost/hof/proj.hpp>
#include <boost/hof/placeholders.hpp>
#include <tuple>
#include <type_traits>
#include <vector>
template<class T>
struct ac
{
T value;
constexpr ac(T i) : value(i)
{}
};
template<class... Ts>
struct tuple_meta
{
typedef std::tuple<Ts...> type;
};
struct tuple_meta_class
{
template<class... Ts>
struct apply
{
typedef std::tuple<Ts...> type;
};
};
struct implicit_default
{
int mem1;
std::string mem2;
};
struct user_default
{
int mem1;
std::string mem2;
user_default() { }
};
struct user_construct
{
int mem1;
std::string mem2;
user_construct(int) { }
};
template<class T>
struct template_user_construct
{
int mem1;
std::string mem2;
template_user_construct(T) { }
};
BOOST_HOF_TEST_CASE()
{
auto v = boost::hof::construct<std::vector<int>>()(5, 5);
BOOST_HOF_TEST_CHECK(v.size() == 5);
BOOST_HOF_TEST_CHECK(v == std::vector<int>{5, 5, 5, 5, 5});
}
BOOST_HOF_TEST_CASE()
{
auto v = boost::hof::construct_basic<std::vector<int>>()(5, 5);
BOOST_HOF_TEST_CHECK(v.size() == 5);
BOOST_HOF_TEST_CHECK(v == std::vector<int>{5, 5, 5, 5, 5});
}
BOOST_HOF_TEST_CASE()
{
auto v = boost::hof::construct_forward<std::vector<int>>()(5, 5);
BOOST_HOF_TEST_CHECK(v.size() == 5);
BOOST_HOF_TEST_CHECK(v == std::vector<int>{5, 5, 5, 5, 5});
}
BOOST_HOF_TEST_CASE()
{
auto x = boost::hof::construct<implicit_default>()();
BOOST_HOF_TEST_CHECK(x.mem1 == 0);
BOOST_HOF_TEST_CHECK(x.mem2 == "");
}
BOOST_HOF_TEST_CASE()
{
auto x = boost::hof::construct<user_default>()();
BOOST_HOF_TEST_CHECK(x.mem1 == 0);
BOOST_HOF_TEST_CHECK(x.mem2 == "");
}
BOOST_HOF_TEST_CASE()
{
auto x = boost::hof::construct<user_construct>()(3);
BOOST_HOF_TEST_CHECK(x.mem1 == 0);
BOOST_HOF_TEST_CHECK(x.mem2 == "");
}
BOOST_HOF_TEST_CASE()
{
auto x = boost::hof::construct<template_user_construct>()(3);
BOOST_HOF_TEST_CHECK(x.mem1 == 0);
BOOST_HOF_TEST_CHECK(x.mem2 == "");
}
BOOST_HOF_TEST_CASE()
{
auto x = boost::hof::construct_forward<template_user_construct>()(3);
BOOST_HOF_TEST_CHECK(x.mem1 == 0);
BOOST_HOF_TEST_CHECK(x.mem2 == "");
}
BOOST_HOF_TEST_CASE()
{
auto x = boost::hof::construct_basic<template_user_construct>()(3);
BOOST_HOF_TEST_CHECK(x.mem1 == 0);
BOOST_HOF_TEST_CHECK(x.mem2 == "");
}
BOOST_HOF_TEST_CASE()
{
auto v = boost::hof::construct<std::vector<int>>()({5, 5, 5, 5, 5});
BOOST_HOF_TEST_CHECK(v.size() == 5);
BOOST_HOF_TEST_CHECK(v == std::vector<int>{5, 5, 5, 5, 5});
}
BOOST_HOF_TEST_CASE()
{
auto t = boost::hof::construct<std::tuple>()(1, 2, 3);
static_assert(std::is_same<std::tuple<int, int, int>, decltype(t)>::value, "");
BOOST_HOF_TEST_CHECK(t == std::make_tuple(1, 2, 3));
// GCC 4.7 doesn't have fully constexpr tuple
#if BOOST_HOF_HAS_CONSTEXPR_TUPLE
BOOST_HOF_STATIC_TEST_CHECK(std::make_tuple(1, 2, 3) == boost::hof::construct<std::tuple>()(1, 2, 3));
#endif
}
BOOST_HOF_TEST_CASE()
{
auto t = boost::hof::construct<std::pair>()(1, 2);
static_assert(std::is_same<std::pair<int, int>, decltype(t)>::value, "");
BOOST_HOF_TEST_CHECK(t == std::make_pair(1, 2));
// GCC 4.7 doesn't have fully constexpr pair
#if BOOST_HOF_HAS_CONSTEXPR_TUPLE
BOOST_HOF_STATIC_TEST_CHECK(std::make_pair(1, 2) == boost::hof::construct<std::pair>()(1, 2));
#endif
}
BOOST_HOF_TEST_CASE()
{
auto f = boost::hof::first_of(boost::hof::construct<std::pair>(), boost::hof::identity);
BOOST_HOF_TEST_CHECK(f(1, 2) == std::make_pair(1, 2));
BOOST_HOF_TEST_CHECK(f(1) == 1);
}
BOOST_HOF_TEST_CASE()
{
auto x = boost::hof::construct<ac>()(1);
static_assert(std::is_same<ac<int>, decltype(x)>::value, "");
BOOST_HOF_TEST_CHECK(x.value == ac<int>(1).value);
BOOST_HOF_STATIC_TEST_CHECK(ac<int>(1).value == boost::hof::construct<ac>()(1).value);
}
BOOST_HOF_TEST_CASE()
{
auto x = boost::hof::construct_basic<ac>()(1);
static_assert(std::is_same<ac<int>, decltype(x)>::value, "");
BOOST_HOF_TEST_CHECK(x.value == ac<int>(1).value);
BOOST_HOF_STATIC_TEST_CHECK(ac<int>(1).value == boost::hof::construct<ac>()(1).value);
}
BOOST_HOF_TEST_CASE()
{
int i = 1;
auto x = boost::hof::construct_forward<ac>()(i);
static_assert(std::is_same<ac<int&>, decltype(x)>::value, "");
BOOST_HOF_TEST_CHECK(&x.value == &i);
}
BOOST_HOF_TEST_CASE()
{
int i = 1;
auto x = boost::hof::construct_basic<ac>()(i);
static_assert(std::is_same<ac<int&>, decltype(x)>::value, "");
BOOST_HOF_TEST_CHECK(&x.value == &i);
}
BOOST_HOF_TEST_CASE()
{
auto t = boost::hof::construct_meta<tuple_meta>()(1, 2, 3);
static_assert(std::is_same<std::tuple<int, int, int>, decltype(t)>::value, "");
BOOST_HOF_TEST_CHECK(t == std::make_tuple(1, 2, 3));
// GCC 4.7 doesn't have fully constexpr tuple
#if BOOST_HOF_HAS_CONSTEXPR_TUPLE
BOOST_HOF_STATIC_TEST_CHECK(std::make_tuple(1, 2, 3) == boost::hof::construct_meta<tuple_meta>()(1, 2, 3));
#endif
}
BOOST_HOF_TEST_CASE()
{
auto t = boost::hof::construct_meta<tuple_meta_class>()(1, 2, 3);
static_assert(std::is_same<std::tuple<int, int, int>, decltype(t)>::value, "");
BOOST_HOF_TEST_CHECK(t == std::make_tuple(1, 2, 3));
// GCC 4.7 doesn't have fully constexpr tuple
#if BOOST_HOF_HAS_CONSTEXPR_TUPLE
BOOST_HOF_STATIC_TEST_CHECK(std::make_tuple(1, 2, 3) == boost::hof::construct_meta<tuple_meta_class>()(1, 2, 3));
#endif
}