mirror of
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229 lines
9.0 KiB
C++
229 lines
9.0 KiB
C++
// Copyright 2024 Christian Mazakas
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// Distributed under the Boost Software License, Version 1.0.
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// https://www.boost.org/LICENSE_1_0.txt
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#include <boost/config/pragma_message.hpp>
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#if !defined(__cpp_noexcept_function_type)
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BOOST_PRAGMA_MESSAGE("Test skipped, __cpp_noexcept_function_type is not defined")
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int main() {}
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#else
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#include <boost/compat/function_ref.hpp>
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#include <boost/config.hpp>
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#include <boost/core/lightweight_test.hpp>
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#include <boost/core/lightweight_test_trait.hpp>
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struct F1 {
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int operator()() { return -1; }
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int operator()(int x1) noexcept { return x1; }
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int operator()(int x1, int x2) const { return 10 * x1 + x2; }
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int operator()(int x1, int x2, int x3) const noexcept { return 100 * x1 + 10 * x2 + x3; }
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};
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struct F2 {
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int operator()(int x1, int x2) & { return 100 * x1 + 10 * x2 + 1; }
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int operator()(int x1, int x2) const& { return 100 * x1 + 10 * x2 + 2; }
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int operator()(int x1, int x2) && { return 100 * x1 + 10 * x2 + 3; }
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int operator()(int x1, int x2) const&& { return 100 * x1 + 10 * x2 + 4; }
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};
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struct X {
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int v = 0;
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X() = default;
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X(int v_) noexcept : v{v_} {}
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};
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struct Y {
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int v = 0;
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Y() = default;
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explicit Y(int v_) : v{v_} {}
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};
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struct Z {
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int v = 0;
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Z() = default;
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Z(int v_) : v{v_} {}
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};
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namespace compat = boost::compat;
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int main() {
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{
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F1 f1;
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{
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using S1 = int() noexcept;
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using S2 = int(int) noexcept;
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using S3 = int(int, int) noexcept;
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using S4 = int(int, int, int) noexcept;
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F1>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F1&>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F1&&>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F1 const>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F1 const&>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F1 const&&>));
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compat::function_ref<S2> fv2(f1);
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BOOST_TEST_EQ(fv2(1), 1);
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S2>, F1 const>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S2>, F1 const&>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S2>, F1 const&&>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S3>, F1>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S3>, F1&>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S3>, F1&&>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S3>, F1 const>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S3>, F1 const&>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S3>, F1 const&&>));
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compat::function_ref<S4> fv4(f1);
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BOOST_TEST_EQ(fv4(1, 2, 3), 123);
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BOOST_TEST_TRAIT_TRUE((std::is_constructible<compat::function_ref<S4>, F1>));
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BOOST_TEST_TRAIT_TRUE((std::is_constructible<compat::function_ref<S4>, F1&>));
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BOOST_TEST_TRAIT_TRUE((std::is_constructible<compat::function_ref<S4>, F1&&>));
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BOOST_TEST_TRAIT_TRUE((std::is_constructible<compat::function_ref<S4>, F1 const>));
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BOOST_TEST_TRAIT_TRUE((std::is_constructible<compat::function_ref<S4>, F1 const&>));
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BOOST_TEST_TRAIT_TRUE((std::is_constructible<compat::function_ref<S4>, F1 const&&>));
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}
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{
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using S1 = int() const noexcept;
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using S2 = int(int) const noexcept;
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using S3 = int(int, int) const noexcept;
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using S4 = int(int, int, int) const noexcept;
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F1>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F1&>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F1&&>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F1 const>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F1 const&>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F1 const&&>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S2>, F1>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S2>, F1&>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S2>, F1&&>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S2>, F1 const>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S2>, F1 const&>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S2>, F1 const&&>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S3>, F1>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S3>, F1&>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S3>, F1&&>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S3>, F1 const>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S3>, F1 const&>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S3>, F1 const&&>));
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compat::function_ref<S4> fv4(f1);
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BOOST_TEST_EQ(fv4(1, 2, 3), 123);
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BOOST_TEST_TRAIT_TRUE((std::is_constructible<compat::function_ref<S4>, F1>));
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BOOST_TEST_TRAIT_TRUE((std::is_constructible<compat::function_ref<S4>, F1&>));
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BOOST_TEST_TRAIT_TRUE((std::is_constructible<compat::function_ref<S4>, F1&&>));
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BOOST_TEST_TRAIT_TRUE((std::is_constructible<compat::function_ref<S4>, F1 const>));
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BOOST_TEST_TRAIT_TRUE((std::is_constructible<compat::function_ref<S4>, F1 const&>));
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BOOST_TEST_TRAIT_TRUE((std::is_constructible<compat::function_ref<S4>, F1 const&&>));
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}
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{
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using S2 = int(int) noexcept;
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using S4 = int(int, int, int) noexcept;
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auto& fref = f1;
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compat::function_ref<S2> fv2(fref);
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BOOST_TEST_EQ(fv2(1), 1);
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auto const& cfref = f1;
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compat::function_ref<S4> fv4(cfref);
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BOOST_TEST_EQ(fv4(1, 2, 3), 123);
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}
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{
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using S4 = int(int, int, int) const noexcept;
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auto const& cfref = f1;
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compat::function_ref<S4> fv4(cfref);
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BOOST_TEST_EQ(fv4(1, 2, 3), 123);
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}
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}
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{
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using S1 = int(int, int) noexcept;
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using S2 = int(int, int) const noexcept;
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F2>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F2&>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F2&&>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F2 const>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F2 const&>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S1>, F2 const&&>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S2>, F2>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S2>, F2&>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S2>, F2&&>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S2>, F2 const>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S2>, F2 const&>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<S2>, F2 const&&>));
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}
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// invoke_r
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{
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F1 f;
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compat::function_ref<X(int, int, int) noexcept> fv1(f);
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BOOST_TEST_EQ(fv1(1, 2, 3).v, 123);
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<Y(int, int, int) noexcept>, F1>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<Z(int, int, int) noexcept>, F1>));
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compat::function_ref<X(int, int, int) const noexcept> fv2(f);
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BOOST_TEST_EQ(fv2(1, 2, 3).v, 123);
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<Y(int, int, int) const noexcept>, F1>));
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BOOST_TEST_TRAIT_FALSE((std::is_constructible<compat::function_ref<Z(int, int, int) const noexcept>, F1>));
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compat::function_ref<void(int, int, int) noexcept> fv3(f);
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fv3(1, 2, 3);
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compat::function_ref<void(int, int, int) const noexcept> fv4(f);
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fv4(1, 2, 3);
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}
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// copy construct, copy assign
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{
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F1 f;
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auto id = [](int x) noexcept { return x + 7331; };
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compat::function_ref<int(int) noexcept> fv(f);
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compat::function_ref<int(int) noexcept> fv2(fv);
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BOOST_TEST_EQ(fv(12), fv2(12));
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fv2 = compat::function_ref<int(int) noexcept>(id);
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BOOST_TEST_EQ(fv2(1), 7332);
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auto add = [](int x, int y, int z) noexcept { return x + y + z; };
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compat::function_ref<int(int, int, int) const noexcept> cfv(f);
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compat::function_ref<int(int, int, int) const noexcept> cfv2(cfv);
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BOOST_TEST_EQ(cfv(1, 2, 3), cfv2(1, 2, 3));
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cfv2 = compat::function_ref<int(int, int, int) const noexcept>(add);
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BOOST_TEST_EQ(cfv2(1, 2, 3), 6);
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}
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return boost::report_errors();
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}
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#endif
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