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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
#include <boost/config/pragma_message.hpp>
#if !defined(__cpp_noexcept_function_type)
BOOST_PRAGMA_MESSAGE("Test skipped, __cpp_noexcept_function_type is not defined")
int main() {}
#else
#include <boost/compat/function_ref.hpp>
#include <boost/config.hpp>
#include <boost/core/lightweight_test.hpp>
#include <boost/core/lightweight_test_trait.hpp>
struct F1 {
int operator()() { return -1; }
int operator()(int x1) noexcept { return x1; }
int operator()(int x1, int x2) const { return 10 * x1 + x2; }
int operator()(int x1, int x2, int x3) const noexcept { return 100 * x1 + 10 * x2 + x3; }
};
struct F2 {
int operator()(int x1, int x2) & { return 100 * x1 + 10 * x2 + 1; }
int operator()(int x1, int x2) const& { return 100 * x1 + 10 * x2 + 2; }
int operator()(int x1, int x2) && { return 100 * x1 + 10 * x2 + 3; }
int operator()(int x1, int x2) const&& { return 100 * x1 + 10 * x2 + 4; }
};
struct X {
int v = 0;
X() = default;
X(int v_) noexcept : v{v_} {}
};
struct Y {
int v = 0;
Y() = default;
explicit Y(int v_) : v{v_} {}
};
struct Z {
int v = 0;
Z() = default;
Z(int v_) : v{v_} {}
};
namespace compat = boost::compat;
int main() {
{
F1 f1;
{
using S1 = int() noexcept;
using S2 = int(int) noexcept;
using S3 = int(int, int) noexcept;
using S4 = int(int, int, int) noexcept;
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F1>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F1&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F1&&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F1 const>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F1 const&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F1 const&&>));
compat::function_ref<S2> fv2(f1);
BOOST_TEST_EQ(fv2(1), 1);
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S2>, F1 const>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S2>, F1 const&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S2>, F1 const&&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S3>, F1>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S3>, F1&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S3>, F1&&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S3>, F1 const>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S3>, F1 const&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S3>, F1 const&&>));
compat::function_ref<S4> fv4(f1);
BOOST_TEST_EQ(fv4(1, 2, 3), 123);
BOOST_TEST_TRAIT_TRUE((std::is_constructible<compat::function_ref<S4>, F1>));
BOOST_TEST_TRAIT_TRUE((std::is_constructible<compat::function_ref<S4>, F1&>));
BOOST_TEST_TRAIT_TRUE((std::is_constructible<compat::function_ref<S4>, F1&&>));
BOOST_TEST_TRAIT_TRUE((std::is_constructible<compat::function_ref<S4>, F1 const>));
BOOST_TEST_TRAIT_TRUE((std::is_constructible<compat::function_ref<S4>, F1 const&>));
BOOST_TEST_TRAIT_TRUE((std::is_constructible<compat::function_ref<S4>, F1 const&&>));
}
{
using S1 = int() const noexcept;
using S2 = int(int) const noexcept;
using S3 = int(int, int) const noexcept;
using S4 = int(int, int, int) const noexcept;
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F1>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F1&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F1&&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F1 const>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F1 const&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F1 const&&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S2>, F1>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S2>, F1&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S2>, F1&&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S2>, F1 const>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S2>, F1 const&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S2>, F1 const&&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S3>, F1>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S3>, F1&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S3>, F1&&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S3>, F1 const>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S3>, F1 const&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S3>, F1 const&&>));
compat::function_ref<S4> fv4(f1);
BOOST_TEST_EQ(fv4(1, 2, 3), 123);
BOOST_TEST_TRAIT_TRUE((std::is_constructible<compat::function_ref<S4>, F1>));
BOOST_TEST_TRAIT_TRUE((std::is_constructible<compat::function_ref<S4>, F1&>));
BOOST_TEST_TRAIT_TRUE((std::is_constructible<compat::function_ref<S4>, F1&&>));
BOOST_TEST_TRAIT_TRUE((std::is_constructible<compat::function_ref<S4>, F1 const>));
BOOST_TEST_TRAIT_TRUE((std::is_constructible<compat::function_ref<S4>, F1 const&>));
BOOST_TEST_TRAIT_TRUE((std::is_constructible<compat::function_ref<S4>, F1 const&&>));
}
{
using S2 = int(int) noexcept;
using S4 = int(int, int, int) noexcept;
auto& fref = f1;
compat::function_ref<S2> fv2(fref);
BOOST_TEST_EQ(fv2(1), 1);
auto const& cfref = f1;
compat::function_ref<S4> fv4(cfref);
BOOST_TEST_EQ(fv4(1, 2, 3), 123);
}
{
using S4 = int(int, int, int) const noexcept;
auto const& cfref = f1;
compat::function_ref<S4> fv4(cfref);
BOOST_TEST_EQ(fv4(1, 2, 3), 123);
}
}
{
using S1 = int(int, int) noexcept;
using S2 = int(int, int) const noexcept;
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F2>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F2&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F2&&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F2 const>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F2 const&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F2 const&&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S2>, F2>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S2>, F2&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S2>, F2&&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S2>, F2 const>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S2>, F2 const&>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S2>, F2 const&&>));
}
// invoke_r
{
F1 f;
compat::function_ref<X(int, int, int) noexcept> fv1(f);
BOOST_TEST_EQ(fv1(1, 2, 3).v, 123);
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<Y(int, int, int) noexcept>, F1>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<Z(int, int, int) noexcept>, F1>));
compat::function_ref<X(int, int, int) const noexcept> fv2(f);
BOOST_TEST_EQ(fv2(1, 2, 3).v, 123);
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<Y(int, int, int) const noexcept>, F1>));
BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<Z(int, int, int) const noexcept>, F1>));
compat::function_ref<void(int, int, int) noexcept> fv3(f);
fv3(1, 2, 3);
compat::function_ref<void(int, int, int) const noexcept> fv4(f);
fv4(1, 2, 3);
}
// copy construct, copy assign
{
F1 f;
auto id = [](int x) noexcept { return x + 7331; };
compat::function_ref<int(int) noexcept> fv(f);
compat::function_ref<int(int) noexcept> fv2(fv);
BOOST_TEST_EQ(fv(12), fv2(12));
fv2 = compat::function_ref<int(int) noexcept>(id);
BOOST_TEST_EQ(fv2(1), 7332);
auto add = [](int x, int y, int z) noexcept { return x + y + z; };
compat::function_ref<int(int, int, int) const noexcept> cfv(f);
compat::function_ref<int(int, int, int) const noexcept> cfv2(cfv);
BOOST_TEST_EQ(cfv(1, 2, 3), cfv2(1, 2, 3));
cfv2 = compat::function_ref<int(int, int, int) const noexcept>(add);
BOOST_TEST_EQ(cfv2(1, 2, 3), 6);
}
return boost::report_errors();
}
#endif
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