Overload.h

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// ----------------------------------------------------------------------------
// -                        CloudViewer: www.cloudViewer.org                  -
// ----------------------------------------------------------------------------
// Copyright (c) 2018-2024 www.cloudViewer.org
// SPDX-License-Identifier: MIT
// ----------------------------------------------------------------------------
 
#pragma once
 
namespace cloudViewer {
namespace utility {
 
template <typename... Ts>
struct Overloaded;
 
template <typename T1, typename... Ts>
struct Overloaded<T1, Ts...> : T1, Overloaded<Ts...> {
    Overloaded(T1 t1, Ts... ts) : T1(t1), Overloaded<Ts...>(ts...) {}
 
    using T1::operator();
    using Overloaded<Ts...>::operator();
};
 
template <typename T1>
struct Overloaded<T1> : T1 {
    Overloaded(T1 t1) : T1(t1) {}
 
    using T1::operator();
};
 
template <typename... Ts>
Overloaded<Ts...> Overload(Ts... ts) {
    return Overloaded<Ts...>(ts...);
}
 
}  // namespace utility
}  // namespace cloudViewer