apply.h

// Copyright 2024 The Pigweed Authors
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at
//
//     https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.
 
// Macros for working with arguments to function-like macros.
#pragma once
 
#include "pw_preprocessor/arguments.h"
#include "pw_preprocessor/internal/apply_macros.h"
 
#define PW_APPLY(macro, separator, forwarded_arg, ...)               \
  _PW_APPLY(_PW_PASTE2(_PW_APL, PW_FUNCTION_ARG_COUNT(__VA_ARGS__)), \
            macro,                                                   \
            separator,                                               \
            forwarded_arg,                                           \
            PW_DROP_LAST_ARG_IF_EMPTY(__VA_ARGS__))
 
#define _PW_APPLY(function, macro, separator, forwarded_arg, ...) \
  function(macro, separator, forwarded_arg, __VA_ARGS__)