1// Copyright (c) 2021-present The Bitcoin Core developers
2// Distributed under the MIT software license, see the accompanying
3// file COPYING or http://www.opensource.org/licenses/mit-license.php.
4
5#ifndef BITCOIN_UTIL_OVERLOADED_H
6#define BITCOIN_UTIL_OVERLOADED_H
7
8namespace util {
9//! Overloaded helper for std::visit. This helper and std::visit in general are
10//! useful to write code that switches on a variant type. Unlike if/else-if and
11//! switch/case statements, std::visit will trigger compile errors if there are
12//! unhandled cases.
13//!
14//! Implementation comes from and example usage can be found at
15//! https://en.cppreference.com/w/cpp/utility/variant/visit#Example
16template<class... Ts> struct Overloaded : Ts... { using Ts::operator()...; };
17} // namespace util
18
19#endif // BITCOIN_UTIL_OVERLOADED_H
20