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// Copyright (c) the JPEG XL Project Authors. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#ifndef LIB_JXL_BASE_C_CALLBACK_SUPPORT_H_
#define LIB_JXL_BASE_C_CALLBACK_SUPPORT_H_
#include <utility>
namespace jxl {
namespace detail {
template <typename T>
struct MethodToCCallbackHelper {};
template <typename T, typename R, typename... Args>
struct MethodToCCallbackHelper<R (T::*)(Args...)> {
template <R (T::*method)(Args...)>
static R Call(void *opaque, Args... args) {
return (reinterpret_cast<T *>(opaque)->*method)(
std::forward<Args>(args)...);
}
};
} // namespace detail
} // namespace jxl
#define METHOD_TO_C_CALLBACK(method) \
::jxl::detail::MethodToCCallbackHelper<decltype(method)>::Call<method>
#endif // LIB_JXL_BASE_C_CALLBACK_SUPPORT_H_