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// Copyright 2024 Christian Mazakas
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#if defined(__GNUC__) && __GNUC__ == 7
#pragma GCC diagnostic ignored "-Wnoexcept-type"
#endif
#include <boost/compat/function_ref.hpp>
#include <boost/core/lightweight_test.hpp>
#include <boost/core/lightweight_test_trait.hpp>
#include <memory>
#include <type_traits>
#if defined(__cpp_nontype_template_parameter_auto) && __cpp_nontype_template_parameter_auto >= 201606L
#define NONTYPE(fn) compat::nontype<fn>
#define NONTYPE_T(fn) compat::nontype_t<fn>
#else
#define NONTYPE(fn) compat::detail::nttp_holder<decltype(fn), fn>{}
#define NONTYPE_T(fn) compat::detail::nttp_holder<decltype(fn), fn>
#endif
struct F1 {
std::unique_ptr<int> p_;
int q_ = 1337;
F1() : p_(new int(1)) {}
int m1() { return *p_ + -1; }
int m2(int x1) noexcept { return 10 * *p_ + x1; }
int m3(int x1, int x2) const { return 100 * *p_ + 10 * x1 + x2; }
int m4(int x1, int x2, int x3) const noexcept { return 1000 * *p_ + 100 * x1 + 10 * x2 + x3; }
};
namespace compat = boost::compat;
int main() {
{
F1 f1;
compat::function_ref<int(F1&)> fn1(NONTYPE(&F1::m1));
BOOST_TEST_EQ(fn1(f1), 0);
int x = 2;
compat::function_ref<int(F1&, int)> fn2(NONTYPE(&F1::m2));
BOOST_TEST_EQ(fn2(f1, x), 12);
compat::function_ref<int(F1&, int, int)> fn3(NONTYPE(&F1::m3));
BOOST_TEST_EQ(fn3(f1, 2, 3), 123);
compat::function_ref<int(F1&, int, int, int)> fn4(NONTYPE(&F1::m4));
BOOST_TEST_EQ(fn4(f1, 2, 3, 4), 1234);
compat::function_ref<int(F1&)> a1(NONTYPE(&F1::q_));
BOOST_TEST_EQ(a1(f1), 1337);
}
{
F1 f1;
compat::function_ref<int(F1&) const> fn1(NONTYPE(&F1::m1));
BOOST_TEST_EQ(fn1(f1), 0);
compat::function_ref<int(F1&, int) const> fn2(NONTYPE(&F1::m2));
BOOST_TEST_EQ(fn2(f1, 2), 12);
compat::function_ref<int(F1&, int, int) const> fn3(NONTYPE(&F1::m3));
BOOST_TEST_EQ(fn3(f1, 2, 3), 123);
compat::function_ref<int(F1&, int, int, int) const> fn4(NONTYPE(&F1::m4));
BOOST_TEST_EQ(fn4(f1, 2, 3, 4), 1234);
}
{
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<int(F1 const&)>, NONTYPE_T(&F1::m1)>));
BOOST_TEST_TRAIT_FALSE(
(std::is_constructible<compat::function_ref<int(F1 const&, int)>, NONTYPE_T(&F1::m2)>));
F1 f1;
compat::function_ref<int(F1 const&, int, int) const> fn3(NONTYPE(&F1::m3));
BOOST_TEST_EQ(fn3(f1, 2, 3), 123);
compat::function_ref<int(F1 const&, int, int, int) const> fn4(NONTYPE(&F1::m4));
BOOST_TEST_EQ(fn4(f1, 2, 3, 4), 1234);
auto const& f2 = f1;
compat::function_ref<int(F1 const&, int, int) const> fn23(NONTYPE(&F1::m3));
BOOST_TEST_EQ(fn3(f2, 2, 3), 123);
compat::function_ref<int(F1 const&, int, int, int) const> fn24(NONTYPE(&F1::m4));
BOOST_TEST_EQ(fn4(f2, 2, 3, 4), 1234);
}
{
BOOST_TEST_TRAIT_TRUE((std::is_constructible<compat::function_ref<int(int)>, NONTYPE_T(&F1::m2), F1&>));
BOOST_TEST_TRAIT_FALSE(
(std::is_constructible<compat::function_ref<int(int)>, NONTYPE_T(&F1::m2), F1 const&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<int(int)>, NONTYPE_T(&F1::m2), F1&&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<int(int)>, NONTYPE_T(&F1::m2), F1>));
BOOST_TEST_TRAIT_TRUE(
(std::is_constructible<compat::function_ref<int(int, int) const>, NONTYPE_T(&F1::m3), F1&>));
BOOST_TEST_TRAIT_TRUE(
(std::is_constructible<compat::function_ref<int(int, int) const>, NONTYPE_T(&F1::m3), F1 const&>));
BOOST_TEST_TRAIT_FALSE(
(std::is_constructible<compat::function_ref<int(int, int) const>, NONTYPE_T(&F1::m3), F1&&>));
BOOST_TEST_TRAIT_FALSE(
(std::is_constructible<compat::function_ref<int(int, int) const>, NONTYPE_T(&F1::m3), F1>));
}
{
F1 f1;
compat::function_ref<int()> fn1(NONTYPE(&F1::m1), f1);
BOOST_TEST_EQ(fn1(), 0);
compat::function_ref<int(int)> fn2(NONTYPE(&F1::m2), f1);
BOOST_TEST_EQ(fn2(2), 12);
compat::function_ref<int(int, int)> fn3(NONTYPE(&F1::m3), f1);
BOOST_TEST_EQ(fn3(2, 3), 123);
compat::function_ref<int(int, int, int)> fn4(NONTYPE(&F1::m4), f1);
BOOST_TEST_EQ(fn4(2, 3, 4), 1234);
}
{
F1 const f1;
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<int() const>, NONTYPE_T(&F1::m1), F1&>));
BOOST_TEST_TRAIT_FALSE(
(std::is_constructible<compat::function_ref<int(int) const>, NONTYPE_T(&F1::m2), F1&>));
compat::function_ref<int(int, int) const> fn3(NONTYPE(&F1::m3), f1);
BOOST_TEST_EQ(fn3(2, 3), 123);
compat::function_ref<int(int, int, int) const> fn4(NONTYPE(&F1::m4), f1);
BOOST_TEST_EQ(fn4(2, 3, 4), 1234);
}
{
F1 f1;
compat::function_ref<int()> fn1(NONTYPE(&F1::m1), &f1);
BOOST_TEST_EQ(fn1(), 0);
compat::function_ref<int(int)> fn2(NONTYPE(&F1::m2), &f1);
BOOST_TEST_EQ(fn2(2), 12);
compat::function_ref<int(int, int)> fn3(NONTYPE(&F1::m3), &f1);
BOOST_TEST_EQ(fn3(2, 3), 123);
compat::function_ref<int(int, int, int)> fn4(NONTYPE(&F1::m4), &f1);
BOOST_TEST_EQ(fn4(2, 3, 4), 1234);
}
{
F1 const f1;
BOOST_TEST_TRAIT_FALSE(
(std::is_constructible<compat::function_ref<int() const>, NONTYPE_T(&F1::m1), F1 const*>));
BOOST_TEST_TRAIT_FALSE(
(std::is_constructible<compat::function_ref<int(int) const>, NONTYPE_T(&F1::m2), F1 const*>));
compat::function_ref<int(int, int) const> fn3(NONTYPE(&F1::m3), &f1);
BOOST_TEST_EQ(fn3(2, 3), 123);
compat::function_ref<int(int, int, int) const> fn4(NONTYPE(&F1::m4), &f1);
BOOST_TEST_EQ(fn4(2, 3, 4), 1234);
}
return boost::report_errors();
}
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