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149 lines
14 KiB
Markdown
149 lines
14 KiB
Markdown
---
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title: "Macros"
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---
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Many of the features or options in the ETL can be selected by defining the appropriate macros.
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Some macros are defined by the ETL.
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Some of the following macros are presented as C++ constants.
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See ETL Traits
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## User defined
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These may be defined in the project settings or the user created `etl_profile.h`.
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| Macro |Description |
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| --------------------------------------------- | -------------------------------------------------------------- |
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| `ETL_NO_CHECKS` | `ETL_ASSERT` has no effect. |
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| `ETL_THROW_EXCEPTIONS` | `ETL_ASSERT` throws the specified exception. |
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| `ETL_THROW_EXCEPTIONS` + `ETL_LOG_ERRORS` | `ETL_ASSERT` calls the error handler then throws an exception. |
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| `ETL_LOG_ERRORS` | `ETL_ASSERT` calls the error handler then asserts. |
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| `ETL_LOG_ERRORS` + `NDEBUG` | `ETL_ASSERT` calls the error handler. |
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| `ETL_CHECK_PUSH_POP` | Pushes and pops to containers are checked for bounds.
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| `ETL_VERBOSE_ERRORS` | If this is defined then error messages are output in their long form. |
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| `ETL_BITSET_ELEMENT_TYPE` | If this is defined, then it will become the type used for elements in the `bitset` class.<br/>Default is `uint_least8_t` |
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| `ETL_FSM_STATE_ID_TYPE` | If this is defined, then it will become the type used for FSM state id numbers.<br/>`Default is uint_least8_t`.
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| `ETL_MESSAGE_ID_TYPE` | If this is defined, then it will become the type used for message id numbers.<br/>`Default is uint_least8_t`.
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| `ETL_TIMER_SEMAPHORE_TYPE` | If this is defined, then it will become the type used for the type for the timer guard variable.<br/>This must be a type that cannot be interrupted during a read/modify/write cycle.<br/>Default is `etl::atomic_uint32_t`. |
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| `ETL_ISTRING_REPAIR_ENABLE` | Define this if you wish to `memcpy` ETL strings and repair them via an `istring` pointer or reference.<br/>Warning: This will make the container a virtual class.|
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| `ETL_IVECTOR_REPAIR_ENABLE` | Define this if you wish to memcpy ETL vectors and repair them via an `ivector` pointer or reference.<br/>Warning: This will make the container a virtual class.|
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| `ETL_IDEQUE_REPAIR_ENABLE` | Define this if you wish to memcpy ETL deques and repair them via an `ideque` pointer or reference.<br/>Warning: This will make the container a virtual class.|
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| `ETL_STLPORT` | This must be defined in the user library profile when using STLPort as the standard library implementation.|
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| `ETL_NO_STL` | If defined, the ETL will not use definitions from the STL.<br/>Instead it will use its own reverse engineered versions.|
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| `ETL_FORCE_EXPLICIT_STRING_CONVERSION_FROM_CHAR` | If defined, the ETL will force `string`, `wstring`, `u8string`, `u16string`, `u32string`, and `string_view` to have explicit construction from a character pointer.|
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| `ETL_STRING_TRUNCATION_IS_ERROR` | If defined, then a string truncation will result in an `etl::string_truncation` error being emitted.|
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| `ETL_ENABLE_ERROR_ON_STRING_TRUNCATION` | See above. |
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| `ETL_ARRAY_VIEW_IS_MUTABLE` | If defined, then `etl::array_view` is mutable. |
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| `ETL_POLYMORPHIC_BITSET` | Defining any one of these will make the corresponding container polymorphic, turning the protected non-virtual destructor to public virtual.|
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| `ETL_POLYMORPHIC_DEQUE` | |
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| `ETL_POLYMORPHIC_FLAT_MAP` | |
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| `ETL_POLYMORPHIC_FLAT_MULTIMAP` | |
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| `ETL_POLYMORPHIC_FLAT_SET` | |
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| `ETL_POLYMORPHIC_FLAT_MULTISET` | |
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| `ETL_POLYMORPHIC_FORWARD_LIST` | |
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| `ETL_POLYMORPHIC_LIST` | |
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| `ETL_POLYMORPHIC_MAP` | |
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| `ETL_POLYMORPHIC_MULTIMAP` | |
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| `ETL_POLYMORPHIC_SET` | |
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| `ETL_POLYMORPHIC_MULTISET` | |
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| `ETL_POLYMORPHIC_QUEUE` | |
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| `ETL_POLYMORPHIC_STACK` | |
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| `ETL_POLYMORPHIC_REFERENCE_FLAT_MAP` | |
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| `ETL_POLYMORPHIC_REFERENCE_FLAT_MULTIMAP` | |
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| `ETL_POLYMORPHIC_REFERENCE_FLAT_SET` | |
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| `ETL_POLYMORPHIC_REFERENCE_FLAT_MULTISET` | |
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| `ETL_POLYMORPHIC_UNORDERED_MAP` | |
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| `ETL_POLYMORPHIC_UNORDERED_MULTIMAP` | |
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| `ETL_POLYMORPHIC_UNORDERED_SET` | |
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| `ETL_POLYMORPHIC_UNORDERED_MULTISET` | |
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| `ETL_POLYMORPHIC_STRINGS` | |
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| `ETL_POLYMORPHIC_POOL` | |
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| `ETL_POLYMORPHIC_VECTOR` | |
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| `ETL_POLYMORPHIC_CONTAINERS` | If defined then all containers are polymorphic.|
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| `ETL_POLYMORPHIC_MESSAGES` | If defined then `etl::imessage` is virtual. |
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| `ETL_MESSAGES_ARE_VIRTUAL` | `ETL_MESSAGES_ARE_VIRTUAL` is deprecated and may be removed.<br/>Only valid before 19.4.1<br/>Messages are virtual, by default, from 19.4.1|
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| `ETL_USE_TYPE_TRAITS_BUILTINS` | Forces the ETL to use calls compiler built-ins.<br/>Sets all of them to be 1 if not already defined.<br/>If not defined `ETL_USE_BUILTIN_IS_ASSIGNABLE` then<br/>`ETL_USE_BUILTIN_IS_ASSIGNABLE = 1`<br/><br/>If not defined ETL_USE_BUILTIN_IS_CONSTRUCTIBLE then<br/>`ETL_USE_BUILTIN_IS_CONSTRUCTIBLE = 1`<br/><br/>If not `ETL_USE_BUILTIN_IS_TRIVIALLY_CONSTRUCTIBLE` then<br/>`ETL_USE_BUILTIN_IS_TRIVIALLY_CONSTRUCTIBLE = 1`<br/><br/>If not defined `ETL_USE_BUILTIN_IS_TRIVIALLY_DESTRUCTIBLE` then<br/>`ETL_USE_BUILTIN_IS_TRIVIALLY_DESTRUCTIBLE = 1`<br/><br/>If not defined `ETL_USE_BUILTIN_IS_TRIVIALLY_COPYABLE` then<br/>`ETL_USE_BUILTIN_IS_TRIVIALLY_COPYABLE = 1`<br/><br/>`ETL_TARGET_DEVICE_GENERIC`<br/>Only `ETL_TARGET_DEVICE_ARM_CORTEX_M0` and `ETL_TARGET_DEVICE_ARM` and `ETL_TARGET_DEVICE_ARM_CORTEX_M0_PLUS` are currently used in the ETL code to disable `etl::atomic`.|
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| `ETL_NO_LIBC_WCHAR_H` | Define if the libc++ used has not been compiled for `wchar_t` support.|
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## ETL defined
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**Defined in platform.h**
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| Macro |Description |
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| ------------------------------------ | -------------------------------------------------------------- |
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| `ETL_DEBUG` | This is defined as `1` if `DEBUG` or `_DEBUG` is defined. Otherwise `0`.|
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| `ETL_8BIT_SUPPORT` | This is defined as `1` if the platform supports 8 bit char types, otherwise 0.<br/>Deprecated.|
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| `ETL_CONSTEXPR` | If `ETL_CPP11_SUPPORTED` is defined as `1` then this macro is defined as `constexpr`, otherwise defined as blank.|
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| `ETL_CONSTEXPR11` | If `ETL_CPP11_SUPPORTED` is defined as `1` then this macro is defined as `constexpr`, otherwise defined as blank.|
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| `ETL_CONSTEXPR14` | If `ETL_CPP14_SUPPORTED` is defined as `1` then this macro is defined as `constexpr`, otherwise defined as blank.|
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| `ETL_CONSTEXPR17` | If `ETL_CPP17_SUPPORTED` is defined as `1` then this macro is defined as `constexpr`, otherwise defined as blank.|
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| `ETL_IF_CONSTEXPR` | If `ETL_CPP17_SUPPORTED` is defined as `1` then this macro is defined as `constexpr`, otherwise defined as blank.|
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| `ETL_CONSTANT` | If `ETL_CPP11_SUPPORTED` is defined as `1` then this macro is defined as `constexpr`, otherwise defined as `const`.|
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| `ETL_NOEXCEPT` | If `ETL_CPP11_SUPPORTED` is defined as `1` then this macro is defined as `noexcept`, otherwise defined as blank.|
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| `ETL_NOEXCEPT_EXPR(expression)` | If `ETL_CPP11_SUPPORTED` is defined as `1` then this macro is defined as `noexcept(expression)`, otherwise defined as blank.|
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| `ETL_NODISCARD` | If `ETL_CPP11_SUPPORTED` is defined as `1` then this macro is defined as `[[nodiscard]]`, otherwise defined as blank.|
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| `ETL_DEPRECATED` | If `ETL_CPP14_SUPPORTED` is defined as `1` then this macro is defined as `[[deprecated]]`, otherwise defined as blank.|
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| `ETL_DEPRECATED_REASON(reason)` | If `ETL_CPP14_SUPPORTED` is defined as `1` then this macro is defined as `[[deprecated(reason)]]`, otherwise defined as blank.|
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| `ETL_FALLTHROUGH` | If `ETL_CPP17_SUPPORTED` is defined as `1` then this macro is defined as `[[falltrough]]`, otherwise defined as blank.|
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| `ETL_NORETURN` | If `ETL_CPP11_SUPPORTED` is defined as `1` then this macro is defined as `[[noreturn]]`, otherwise defined as blank.|
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| `ETL_OR_STD` | If ETL_NO_STL is defined and ETL_IN_UNIT_TEST is not then `ETL_OR_STD` is defined as `etl`, otherwise it is defined as `std`.|
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| `ETL_IN_UNIT_TEST` | If defined, then the code is being compiled in the unit tests.<br/>For internal ETL use only.|
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| `ETL_HAS_ATOMIC` | This is defined as `1` if the compiler supplies an atomic class, otherwise `0`.|
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| `ETL_INLINE_VAR` | If `ETL_CPP17_SUPPORTED` is defined as `1` then this macro is defined as `inline`, otherwise defined as blank.|
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| `ETL_USING_STL` | This macro will be defined as `0` & `1` dependant of whether `ETL_NO_STL` is defined or not.|
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| `ETL_NOT_USING_STL` | Inversion of `ETL_USING_STL`.|
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| `ETL_USING_STLPORT` | This macro will be defined as `0` & `1` dependant of whether `ETL_STLPORT` is defined or not.|
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| `ETL_NOT_USING_STLPORT` | Inversion of `ETL_USING_STLPORT`.|
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| `ETL_USING_8BIT_TYPES` | This macro will be defined as `0` & `1` dependant of whether `CHAR_BIT == 8` or not.|
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| `ETL_NOT_USING_8BIT_TYPES` | Inversion of `ETL_USING_8BIT_TYPES`.|
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| `ETL_USING_64BIT_TYPES` | This macro will be defined as `0` & `1` dependant of whether `ETL_NO_64BIT_TYPES` is defined or not.|
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| `ETL_NOT_USING_64BIT_TYPES` | Inversion of `ETL_USING_64BIT_TYPES`.|
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| `ETL_HAS_ISTRING_REPAIR` | Set to `1` if the repair functionality for `etl::istring` is enabled, otherwise `0`.|
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| `ETL_HAS_IVECTOR_REPAIR` | Set to `1` if the repair functionality for `etl::ivector` is enabled, otherwise `0`.|
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| `ETL_HAS_IDEQUE_REPAIR` | Set to `1` if the repair functionality for `etl::ideque` is enabled, otherwise `0`.|
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| `ETL_IS_DEBUG_BUILD` | Set to `1` if in a debug build, otherwise `0`.|
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| `ETL_HAS_POLYMORPHIC_MESSAGES` | Set to `1` if messages are polymorphic, otherwise `0`.|
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| `ETL_HAS_ERROR_ON_STRING_TRUNCATION` | Set to `1` if truncated strings are an error, otherwise `0`.|
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| `ETL_USING_LIBC_WCHAR_H` | These macros will be defined as `0` & `1` dependant of whether `ETL_NO_LIBC_WCHAR_H` is defined or not.|
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| `ETL_NOT_USING_LIBC_WCHAR_H` | Inversion of `ETL_USING_LIBC_WCHAR_H`.|
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| `ETL_USING_CPP11` | This is defined as `1` if the compiler supports C++11, otherwise `0`.|
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| `ETL_USING_CPP14` | This is defined as `1` if the compiler supports C++14, otherwise `0`.|
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| `ETL_USING_CPP17` | This is defined as `1` if the compiler supports C++17, otherwise `0`.|
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| `ETL_USING_CPP20` | This is defined as `1` if the compiler supports C++20, otherwise `0`.|
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| `ETL_USING_CPP23` | This is defined as `1` if the compiler supports C++23, otherwise `0`.|
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These may be user defined in `etl_profile.h`, or automatically determined in `platform.h`.
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| Macro |Description |
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| ------------------------------------ | -------------------------------------------------------------- |
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| `ETL_CPP11_SUPPORTED` | This is defined as `1` if the compiler supports C++11, otherwise `0`.|
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| `ETL_CPP14_SUPPORTED` | This is defined as `1` if the compiler supports C++14, otherwise `0`.|
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| `ETL_CPP17_SUPPORTED` | This is defined as `1` if the compiler supports C++17, otherwise `0`.|
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| `ETL_CPP20_SUPPORTED` | This is defined as `1` if the compiler supports C++20, otherwise `0`.|
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| `ETL_CPP23_SUPPORTED` | This is defined as `1` if the compiler supports C++23, otherwise `0`.|
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| `ETL_NO_NULLPTR_SUPPORT` | This is defined as `1` if compiler does not support `nullptr`, otherwise `0`.|
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| `ETL_NO_LARGE_CHAR_SUPPORT` | This is defined as `1` if the compiler does not support `char16_t` or `char32_t` types, otherwise `0`.|
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| `ETL_CPP11_TYPE_TRAITS_IS_TRIVIAL_SUPPORTED` | This is defined as `1` if compiler supports the `std::is_trivially_xxx` set of traits, otherwise `0`.|
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| `ETL_COMPILER_IAR` | One of these will be defined.|
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| `ETL_COMPILER_GREEN_HILLS` | |
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| `ETL_COMPILER_INTEL` | |
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| `ETL_COMPILER_MICROSOFT` | |
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| `ETL_COMPILER_GCC` | |
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| `ETL_COMPILER_CLANG` | |
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| `ETL_COMPILER_ARM` | |
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| `ETL_COMPILER_TEXAS_INSTRUMENTS` | |
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| `ETL_COMPILER_GENERIC` | |
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| `ETL_COMPILER_VERSION | These will be defined as the compiler version numbers, if available.|
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| `ETL_COMPILER_FULL_VERSION` | |
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| `ETL_DEVELOPMENT_OS_WINDOWS` | One of these will be defined.|
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| `ETL_DEVELOPMENT_OS_LINUX` | |
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| `ETL_DEVELOPMENT_OS_UNIX` | |
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| `ETL_DEVELOPMENT_OS_APPLE` | |
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| `ETL_DEVELOPMENT_OS_BSD` | |
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| `ETL_DEVELOPMENT_OS_GENERIC` | |
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| `ETL_NO_CPP_NAN_SUPPORT` | If defined, indicates that the compiler does not support nan(), nanf() or nanl().<br/>Automatically defined if using CodeWorks for ARM.|
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