Preprocessor.h

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// ----------------------------------------------------------------------------
// -                        CloudViewer: www.cloudViewer.org                  -
// ----------------------------------------------------------------------------
// Copyright (c) 2018-2024 www.cloudViewer.org
// SPDX-License-Identifier: MIT
// ----------------------------------------------------------------------------
 
#pragma once
 
#define CLOUDVIEWER_FIX_MSVC_(...) __VA_ARGS__
 
#define CLOUDVIEWER_CONCAT_IMPL_(s1, s2) s1##s2
#define CLOUDVIEWER_CONCAT(s1, s2) CLOUDVIEWER_CONCAT_IMPL_(s1, s2)
 
#define CLOUDVIEWER_STRINGIFY_IMPL_(s) #s
#define CLOUDVIEWER_STRINGIFY(s) CLOUDVIEWER_STRINGIFY_IMPL_(s)
 
#define CLOUDVIEWER_GET_NTH_ARG_(...) \
    CLOUDVIEWER_FIX_MSVC_(CLOUDVIEWER_GET_NTH_ARG_IMPL_(__VA_ARGS__))
#define CLOUDVIEWER_GET_NTH_ARG_IMPL_(arg1, arg2, arg3, arg4, arg5, arg6, \
                                      arg7, arg8, arg9, arg10, N, ...)    \
    N
#define CLOUDVIEWER_REVERSE_NUM_SEQUENCE_() 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0
#define CLOUDVIEWER_NUM_ARGS(...) \
    CLOUDVIEWER_GET_NTH_ARG_(__VA_ARGS__, CLOUDVIEWER_REVERSE_NUM_SEQUENCE_())
 
#define CLOUDVIEWER_OVERLOAD(func, ...) \
    CLOUDVIEWER_CONCAT(func, CLOUDVIEWER_NUM_ARGS(__VA_ARGS__))