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/*=============================================================================
Copyright (c) 2017 Paul Fultz II
first_of.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/first_of.hpp>
#include <boost/hof/static.hpp>
#include <boost/hof/lambda.hpp>
#include <boost/hof/function.hpp>
#include <memory>
#include "test.hpp"
namespace conditional_test {
#define CONDITIONAL_FUNCTION(n) \
struct t ## n {}; \
struct f ## n \
{ \
constexpr int operator()(t ## n) const \
{ \
return n; \
} \
};
CONDITIONAL_FUNCTION(1)
CONDITIONAL_FUNCTION(2)
CONDITIONAL_FUNCTION(3)
#define CONDITIONAL_MOVE_FUNCTION(n) \
struct t_move ## n {}; \
struct f_move ## n \
{ \
std::unique_ptr<int> i;\
f_move ## n(int ip) : i(new int(ip)) {}; \
int operator()(t_move ## n) const \
{ \
return *i; \
} \
};
CONDITIONAL_MOVE_FUNCTION(1)
CONDITIONAL_MOVE_FUNCTION(2)
CONDITIONAL_MOVE_FUNCTION(3)
struct ff
{
constexpr int operator()(t2) const
{
return 500;
}
};
static constexpr boost::hof::static_<boost::hof::first_of_adaptor<f1, f2, f3, ff> > f = {};
BOOST_HOF_STATIC_FUNCTION(f_constexpr) = boost::hof::first_of_adaptor<f1, f2, f3, ff>();
BOOST_HOF_TEST_CASE()
{
BOOST_HOF_TEST_CHECK(f(t1()) == 1);
BOOST_HOF_TEST_CHECK(f(t2()) == 2);
BOOST_HOF_TEST_CHECK(f(t3()) == 3);
BOOST_HOF_STATIC_TEST_CHECK(f_constexpr(t1()) == 1);
BOOST_HOF_STATIC_TEST_CHECK(f_constexpr(t2()) == 2);
BOOST_HOF_STATIC_TEST_CHECK(f_constexpr(t3()) == 3);
}
BOOST_HOF_TEST_CASE()
{
BOOST_HOF_TEST_CHECK(boost::hof::first_of(f1{}, f2{})(t1()) == 1);
BOOST_HOF_TEST_CHECK(boost::hof::first_of(f1{}, f2{})(t2()) == 2);
BOOST_HOF_STATIC_TEST_CHECK(boost::hof::first_of(f1{}, f2{})(t1()) == 1);
BOOST_HOF_STATIC_TEST_CHECK(boost::hof::first_of(f1{}, f2{})(t2()) == 2);
}
#if (defined(__GNUC__) && !defined (__clang__) && __GNUC__ == 4 && __GNUC_MINOR__ < 7)
#else
BOOST_HOF_TEST_CASE()
{
BOOST_HOF_TEST_CHECK(boost::hof::first_of(boost::hof::first_of(f1{}, f2{}), boost::hof::first_of(f1{}, f2{}))(t1()) == 1);
BOOST_HOF_TEST_CHECK(boost::hof::first_of(boost::hof::first_of(f1{}, f2{}), boost::hof::first_of(f1{}, f2{}))(t2()) == 2);
BOOST_HOF_STATIC_TEST_CHECK(boost::hof::first_of(boost::hof::first_of(f1{}, f2{}), boost::hof::first_of(f1{}, f2{}))(t1()) == 1);
BOOST_HOF_STATIC_TEST_CHECK(boost::hof::first_of(boost::hof::first_of(f1{}, f2{}), boost::hof::first_of(f1{}, f2{}))(t2()) == 2);
}
BOOST_HOF_TEST_CASE()
{
BOOST_HOF_TEST_CHECK(boost::hof::first_of(f1{}, boost::hof::first_of(f2{}, f3{}))(t1()) == 1);
BOOST_HOF_TEST_CHECK(boost::hof::first_of(f1{}, boost::hof::first_of(f2{}, f3{}))(t2()) == 2);
BOOST_HOF_TEST_CHECK(boost::hof::first_of(f1{}, boost::hof::first_of(f2{}, f3{}))(t3()) == 3);
BOOST_HOF_STATIC_TEST_CHECK(boost::hof::first_of(f1{}, boost::hof::first_of(f2{}, f3{}))(t1()) == 1);
BOOST_HOF_STATIC_TEST_CHECK(boost::hof::first_of(f1{}, boost::hof::first_of(f2{}, f3{}))(t2()) == 2);
BOOST_HOF_STATIC_TEST_CHECK(boost::hof::first_of(f1{}, boost::hof::first_of(f2{}, f3{}))(t3()) == 3);
}
BOOST_HOF_TEST_CASE()
{
BOOST_HOF_TEST_CHECK(boost::hof::first_of(boost::hof::first_of(f1{}, f2{}), boost::hof::first_of(f2{}, f3{}))(t1()) == 1);
BOOST_HOF_TEST_CHECK(boost::hof::first_of(boost::hof::first_of(f1{}, f2{}), boost::hof::first_of(f2{}, f3{}))(t2()) == 2);
BOOST_HOF_TEST_CHECK(boost::hof::first_of(boost::hof::first_of(f1{}, f2{}), boost::hof::first_of(f2{}, f3{}))(t3()) == 3);
BOOST_HOF_STATIC_TEST_CHECK(boost::hof::first_of(boost::hof::first_of(f1{}, f2{}), boost::hof::first_of(f2{}, f3{}))(t1()) == 1);
BOOST_HOF_STATIC_TEST_CHECK(boost::hof::first_of(boost::hof::first_of(f1{}, f2{}), boost::hof::first_of(f2{}, f3{}))(t2()) == 2);
BOOST_HOF_STATIC_TEST_CHECK(boost::hof::first_of(boost::hof::first_of(f1{}, f2{}), boost::hof::first_of(f2{}, f3{}))(t3()) == 3);
}
#endif
BOOST_HOF_TEST_CASE()
{
auto f_move_local = boost::hof::first_of(f_move1(1), f_move2(2), f_move3(3));
STATIC_ASSERT_MOVE_ONLY(decltype(f_move_local));
BOOST_HOF_TEST_CHECK(f_move_local(t_move1()) == 1);
BOOST_HOF_TEST_CHECK(f_move_local(t_move2()) == 2);
BOOST_HOF_TEST_CHECK(f_move_local(t_move3()) == 3);
}
#ifndef _MSC_VER
static constexpr auto lam = boost::hof::first_of(
BOOST_HOF_STATIC_LAMBDA(t1)
{
return 1;
},
BOOST_HOF_STATIC_LAMBDA(t2)
{
return 2;
},
BOOST_HOF_STATIC_LAMBDA(t3)
{
return 3;
}
);
BOOST_HOF_TEST_CASE()
{
BOOST_HOF_TEST_CHECK(lam(t1()) == 1);
BOOST_HOF_TEST_CHECK(lam(t2()) == 2);
BOOST_HOF_TEST_CHECK(lam(t3()) == 3);
}
#endif
BOOST_HOF_STATIC_LAMBDA_FUNCTION(static_fun) = boost::hof::first_of(
[](t1)
{
return 1;
},
[](t2)
{
return 2;
},
[](t3)
{
return 3;
}
);
BOOST_HOF_TEST_CASE()
{
BOOST_HOF_TEST_CHECK(static_fun(t1()) == 1);
BOOST_HOF_TEST_CHECK(static_fun(t2()) == 2);
BOOST_HOF_TEST_CHECK(static_fun(t3()) == 3);
}
BOOST_HOF_TEST_CASE()
{
BOOST_HOF_TEST_CHECK(boost::hof::first_of(boost::hof::identity, boost::hof::identity)(3) == 3);
}
template<class T>
struct throw_fo
{
void operator()(T) const {}
};
template<class T>
struct no_throw_fo
{
void operator()(T) const noexcept {}
};
#if BOOST_HOF_HAS_NOEXCEPT_DEDUCTION
BOOST_HOF_TEST_CASE()
{
typedef boost::hof::first_of_adaptor<throw_fo<t1>, no_throw_fo<t2>> fun;
auto g = fun{};
static_assert(noexcept(g(t2{})), "noexcept conditional");
static_assert(!noexcept(g(t1{})), "noexcept conditional");
static_assert(noexcept(fun{}(t2{})), "noexcept conditional");
static_assert(!noexcept(fun{}(t1{})), "noexcept conditional");
}
BOOST_HOF_TEST_CASE()
{
typedef boost::hof::first_of_adaptor<no_throw_fo<t2>, throw_fo<t1>> fun;
auto g = fun{};
static_assert(noexcept(g(t2{})), "noexcept conditional");
static_assert(!noexcept(g(t1{})), "noexcept conditional");
static_assert(noexcept(fun{}(t2{})), "noexcept conditional");
static_assert(!noexcept(fun{}(t1{})), "noexcept conditional");
}
BOOST_HOF_TEST_CASE()
{
static_assert(noexcept(boost::hof::first_of_adaptor<no_throw_fo<t2>, throw_fo<t1>>{}(t2{})), "noexcept conditional");
static_assert(!noexcept(boost::hof::first_of_adaptor<no_throw_fo<t2>, throw_fo<t1>>{}(t1{})), "noexcept conditional");
static_assert(noexcept(boost::hof::first_of(no_throw_fo<t2>{}, throw_fo<t1>{})(t2{})), "noexcept conditional");
static_assert(!noexcept(boost::hof::first_of(no_throw_fo<t2>{}, throw_fo<t1>{})(t1{})), "noexcept conditional");
}
#endif
}
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