35 lines
1.0 KiB
C++
35 lines
1.0 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-inconsistent-missing-override
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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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struct S { unsigned i:2, j:6; };
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consteval auto member_named(std::string_view name) {
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constexpr auto ctx = std::meta::access_context::current();
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for (std::meta::info field : nonstatic_data_members_of(^^S, ctx)) {
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if (identifier_of(field) == name) return field;
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}
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std::unreachable();
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}
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int main() {
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S s{0, 0};
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s.[:member_named("j"):] = 42; // Same as: s.j = 42;
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}
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