65 lines
2.1 KiB
C++
65 lines
2.1 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Copyright 2024 Bloomberg Finance L.P.
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03 || c++11 || c++14 || c++17 || c++20
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// ADDITIONAL_COMPILE_FLAGS: -freflection
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// ADDITIONAL_COMPILE_FLAGS: -Wno-unneeded-internal-declaration
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// <experimental/reflection>
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//
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// [reflection]
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#include <experimental/meta>
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constexpr auto ctx = std::meta::access_context::unchecked();
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// =============
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// static_arrays
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// =============
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namespace static_arrays {
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constexpr auto empty = std::define_static_array(std::vector<int>{});
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static_assert(empty.size() == 0);
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constexpr auto ints = std::define_static_array(std::vector{1, 3, 5});
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static_assert(ints.size() == 3);
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static_assert(ints[0] == 1 && ints[1] == 3 && ints[2] == 5);
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struct Cls {
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int k;
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consteval Cls(int v) : k(v) {}
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consteval Cls(const Cls &rhs) : k(rhs.k + 1) {}
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};
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constexpr auto objs = std::define_static_array(std::vector<Cls>{1, 3, 5});
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static_assert(objs.size() == 3);
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static_assert(objs[0].k == 5 && objs[1].k == 7 && objs[2].k == 9);
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constexpr auto infos = std::define_static_array(
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nonstatic_data_members_of(^^Cls,
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ctx));
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static_assert(infos.size() == 1);
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static_assert(infos[0] == ^^Cls::k);
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} // namespace static_arrays
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// ==============
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// static_strings
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// ==============
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namespace static_strings {
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// Ensure 'define_static_string("literal")' can be used as a template argument.
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template <auto S> consteval auto fn() { return S[0]; }
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static_assert(fn<std::define_static_string("literal")>() == 'l');
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} // namespace static_strings
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int main() { }
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