typesizecheck.h

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//-----------------------------------------------------------------------------
// Project     : SDK Core
//
// Category    : SDK Core Interfaces
// Filename    : pluginterfaces/base/typesizecheck.h
// Created by  : Steinberg, 08/2018
// Description : Compile time type size check macro
//
//-----------------------------------------------------------------------------
// This file is part of a Steinberg SDK. It is subject to the license terms
// in the LICENSE file found in the top-level directory of this distribution
// and at www.steinberg.net/sdklicenses.
// No part of the SDK, including this file, may be copied, modified, propagated,
// or distributed except according to the terms contained in the LICENSE file.
//-----------------------------------------------------------------------------
 
#pragma once
 
#include "pluginterfaces/base/fplatform.h"
 
#if SMTG_CPP11
#define SMTG_TYPE_STATIC_CHECK(Operator, Type, Platform64Size, MacOS32Size, Win32Size,             \
                               Linux32Size)                                                        \
        namespace {                                                                                    \
        template <typename Type, size_t w, size_t x, size_t y, size_t z>                               \
        struct Operator##Check##Type                                                                   \
        {                                                                                              \
                constexpr Operator##Check##Type ()                                                         \
                {                                                                                          \
                        static_assert (Operator (Type) ==                                                      \
                                           (SMTG_PLATFORM_64 ? w : SMTG_OS_MACOS ? x : SMTG_OS_LINUX ? z : y), \
                                       "Struct " #Operator " error: " #Type);                                     \
                }                                                                                          \
        };                                                                                             \
        static constexpr Operator##Check##Type<Type, Platform64Size, MacOS32Size, Win32Size,           \
                                               Linux32Size>                                            \
            instance##Operator##Type;                                                                  \
        }

#define SMTG_TYPE_SIZE_CHECK(Type, Platform64Size, MacOS32Size, Win32Size, Linux32Size) \
        SMTG_TYPE_STATIC_CHECK (sizeof, Type, Platform64Size, MacOS32Size, Win32Size, Linux32Size)

#define SMTG_TYPE_ALIGN_CHECK(Type, Platform64Size, MacOS32Size, Win32Size, Linux32Size) \
        SMTG_TYPE_STATIC_CHECK (alignof, Type, Platform64Size, MacOS32Size, Win32Size, Linux32Size)
 
#else
// need static_assert
#define SMTG_TYPE_SIZE_CHECK(Type, Platform64Size, MacOS32Size, Win32Size, Linux32Size)
#endif