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platform.h

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+///\file
+
+/******************************************************************************
+The MIT License(MIT)
+
+Embedded Template Library.
+https://github.com/ETLCPP/etl
+https://www.etlcpp.com
+
+Copyright(c) 2016 jwellbelove
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files(the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions :
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+******************************************************************************/
+
+#ifndef ETL_PLATFORM_INCLUDED
+#define ETL_PLATFORM_INCLUDED
+
+#include <stdint.h>
+#include <limits.h>
+
+// Some targets do not support 8bit types.
+#define ETL_8BIT_SUPPORT (CHAR_BIT == 8)
+
+// Define a debug macro
+#if !defined(ETL_DEBUG)
+  #if defined(_DEBUG) || defined(DEBUG)
+    #define ETL_DEBUG
+  #endif
+#endif
+
+// Determine the bit width of the platform.
+#define ETL_PLATFORM_16BIT (UINT16_MAX == UINTPTR_MAX)
+#define ETL_PLATFORM_32BIT (UINT32_MAX == UINTPTR_MAX)
+#define ETL_PLATFORM_64BIT (UINT64_MAX == UINTPTR_MAX)
+
+// Include the user's profile definition.
+#include "etl_profile.h"
+
+// Figure out things about the compiler, if haven't already done so in etl_profile.h
+#include "profiles/determine_compiler_version.h"
+#include "profiles/determine_compiler_language_support.h"
+
+// See if we can determine the OS we're compiling on, if haven't already done so in etl_profile.h
+#include "profiles/determine_development_os.h"
+
+#if defined(ETL_FORCE_EXPLICIT_STRING_CONVERSION_FROM_CHAR)
+  #define ETL_EXPLICIT_STRING_FROM_CHAR explicit
+#else
+  #define ETL_EXPLICIT_STRING_FROM_CHAR
+#endif
+
+// The macros below are dependent on the profile.
+// C++11
+#if ETL_CPP11_SUPPORTED && !defined(ETL_FORCE_NO_ADVANCED_CPP)
+  #define ETL_CONSTEXPR constexpr
+  #define ETL_CONST_OR_CONSTEXPR constexpr
+  #define ETL_DELETE = delete
+  #define ETL_EXPLICIT explicit
+  #define ETL_OVERRIDE override
+  #define ETL_FINAL final
+  #define ETL_NORETURN [[noreturn]]
+
+  #if defined(ETL_EXCEPTIONS_DISABLED)
+    #define ETL_NOEXCEPT
+    #define ETL_NOEXCEPT_EXPR(expression)
+  #else
+    #define ETL_NOEXCEPT  noexcept
+    #define ETL_NOEXCEPT_EXPR(expression) noexcept(expression)
+  #endif
+#else
+  #define ETL_CONSTEXPR
+  #define ETL_CONST_OR_CONSTEXPR const
+  #define ETL_DELETE
+  #define ETL_EXPLICIT
+  #define ETL_OVERRIDE
+  #define ETL_FINAL
+  #define ETL_NORETURN
+  #define ETL_NOEXCEPT
+  #define ETL_NOEXCEPT_EXPR(expression)
+#endif
+
+// C++14
+#if ETL_CPP14_SUPPORTED && !defined(ETL_FORCE_NO_ADVANCED_CPP)
+  #define ETL_CONSTEXPR14 constexpr
+  #define ETL_DEPRECATED [[deprecated]]
+  #define ETL_DEPRECATED_REASON(reason) [[deprecated(reason)]]
+#else
+  #define ETL_CONSTEXPR14
+  #define ETL_DEPRECATED
+  #define ETL_DEPRECATED_REASON(reason)
+#endif
+
+// C++17
+#if ETL_CPP17_SUPPORTED && !defined(ETL_FORCE_NO_ADVANCED_CPP)
+  #define ETL_CONSTEXPR17 constexpr
+  #define ETL_IF_CONSTEXPR constexpr
+  #define ETL_NODISCARD [[nodiscard]]
+  #define ETL_FALLTHROUGH [[fallthrough]]
+#else
+  #define ETL_CONSTEXPR17
+  #define ETL_IF_CONSTEXPR
+  #define ETL_NODISCARD
+  #define ETL_FALLTHROUGH
+#endif
+
+// C++20
+#if ETL_CPP20_SUPPORTED && !defined(ETL_FORCE_NO_ADVANCED_CPP)
+  #define ETL_LIKELY [[likely]]
+  #define ETL_UNLIKELY [[unlikely]]
+#else
+  #define ETL_LIKELY
+  #define ETL_UNLIKELY
+#endif
+
+// Sort out namespaces for STL/No STL options.
+#include "private/choose_namespace.h"
+
+#endif