UT_Optional.h

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/*
 * PROPRIETARY INFORMATION.  This software is proprietary to
 * Side Effects Software Inc., and is not to be reproduced,
 * transmitted, or disclosed in any way without written permission.
 *
 * RELATION TO THE STL:
 *
 * Use the wrapper UT_Optional instead of std::optional for consistent style
 *
 * Reasoning:
 *
 * This used to be hboost::optional prior to C++17
 */

#pragma once

#ifndef __UT_OPTIONAL_H_INCLUDED__
#define __UT_OPTIONAL_H_INCLUDED__

#include <SYS/SYS_TypeDecorate.h>
#include <optional>

#define UT_NULLOPT std::nullopt

template <typename T>
using UT_Optional = std::optional<T>;

#define UTmakeOptional std::make_optional

//
// Declare relocation traits. See SYS_TypeDecorate.h
//

// Guaranteed safe for trivial relocation:
template <typename T>
struct SafeTrivialRelocationNoCV< UT_Optional< T > > : SafeTrivialRelocationNoCV< SYS_RemoveCV_t< T > > {};

// Known to be unsafe for trivial relocation:
template <typename T>
struct UnsafeTrivialRelocationNoCV< UT_Optional< T > > : UnsafeTrivialRelocationNoCV< SYS_RemoveCV_t< T > > {};


#endif