A C++ template library for embedded applications
MIT licensed
Join the ETL community
Designed and
maintained by
John Wellbelove
Like the ETL? Become a patron!

Releases


18.12.1
Fixed compiler compatibility issues in etl::forward_list and etl::list
___________________________________________________________________________________________________
18.12.0
Recoded string utility get_token()
clang 9 compatibility changes
___________________________________________________________________________________________________
18.11.1
Fix and optimise etl::list and etl::forward_list move constructors and assignment operators.
___________________________________________________________________________________________________
18.11.0
Added etl::ibitset::span() member functions to return a span of the underlying binary data.
___________________________________________________________________________________________________
18.10.0
Fixed pointer vector move operators.
Optimised constructors and assignments for pointer vectors.
___________________________________________________________________________________________________
18.9.0
Added enable/disable observer interface to observable class.
___________________________________________________________________________________________________
18.8.0
Re-coded string utilities to allow any string-like container to use it.
___________________________________________________________________________________________________
18.7.1
Removed to_upper_case, to_lower_case & to_sentence_case from
wstring_utilities, u16string_utilities & u32string_utilities
___________________________________________________________________________________________________
18.7.0
String utilities added.
Fixed C++03 compatibility issue in error_handler.h
___________________________________________________________________________________________________
18.6.0
Added stream manipulators
___________________________________________________________________________________________________
18.5.0
Added string streams
etl::string_stream
etl::wstring_stream
etl::u16string_stream
etl::u32string_stream

Added string formatting to etl::to_string from
etl::string etl::string_view
etl::wstring etl::wstring_view
etl::u16string etl::u16string_view
etl::u32string etl::u32string_view
___________________________________________________________________________________________________
18.4.0
Added:
etl::string_steam, etl::wstring_stream, etl::u16string_stream and etl::u32string_stream
Updated etl::format_spec, etl::wformat_spec, etl::u16format_spec and etl::u32format_spec to support string
stream features.
Note: The default for uppercase for the format spec is now false, for compatibility with the STL defaults.
The string streams supply versions of most of the common STL IO manipulators.
Strings are now formatted by to_string().
___________________________________________________________________________________________________
18.4.0
Refactored etl::error_handler to use etl::delegate style implementation.
Allows set_callback() function to be given run-time and compile-time pointers to free and member functions
without using etl::ifunction.
___________________________________________________________________________________________________
18.3.4
Changed std::move to etl::move in std::optional and std::queue
Fixed etl::span subspan with etl::dynamic_extent
___________________________________________________________________________________________________
18.3.3
C++03 compatibility fix for type_traits.h
___________________________________________________________________________________________________
18.3.2
C++03 compatibility fix for pool.h
___________________________________________________________________________________________________
18.3.1
C++03 compatibility fix for type_traits.h
___________________________________________________________________________________________________
18.3.0
Added etl::parameter_pack to easily extract information about the types in a
template parameter pack.
___________________________________________________________________________________________________
18.2.0
Variadic versions of etl::type_id_lookup and etl::type_type_lookup for C++11 and above.
___________________________________________________________________________________________________
18.1.3
Added CircleCI yml file for master branch
___________________________________________________________________________________________________
18.1.2
Fixed undefined behaviour warning for #define that contained 'define'.
Restored CMakeLists.txt to root directory.
___________________________________________________________________________________________________
18.1.1
Fixed bug for when merging a list to itself for etl::list, etl::intrusive_list & etl::intrusive_forward_list.
___________________________________________________________________________________________________
18.1.0
Strings may use external buffers if the 'max size' template parameter is zero.
___________________________________________________________________________________________________
18.0.1
Fixed 'insert to empty container' bug in etl::deque.
___________________________________________________________________________________________________
18.0.0
*************************
** API Breaking Change
Removed template typename requirement for allocate and create in etl::pool
*************************

Small internal updates to state_chart

Updates to static and runtime asserts in binary.h

Added a default constructor for etl::io_port_wos

Removed deleted constructors and assignment operator for etl::null_type

Added casts to etl::smallest_int_for_value

Added constexpr in place of enum for C++11 in sqrt.h

Replaced typedef typename etl::remove_cv<T>::type type_t with typedef typename
etl::remove_reference<typename etl::remove_cv<T>::type>::type type_t in type_traits.h

Removed Windows Unicode dependency in CMakeLists.txt

Added test_log_1000_base test

Updated how Conan gets the library version
___________________________________________________________________________________________________
17.8.3
Modified etl::delegate for better lambda support.
Added etl::is_class to type_traits.h
Added missing return statement in etl::move_iterator in operator =
Added support for compilers that do not support LDBL_xxx macros
___________________________________________________________________________________________________
17.8.2
Added check for NAN, nan(), nanf() or nanl() support.
___________________________________________________________________________________________________
17.8.1
Added determine_development_os.h to platform.h to attempt to automatically deduce the OS that the developer is
using.
Added subsequent changes to unit test's etl_profile.h
Removed CMakeLists.txt that auto selected profiles header (this should be done in the project's etl_profile.h)
Removed profiles/etl_profile.h
Added missing tests to unit test's CMakelists.txt
Changed the wording on the website to indicate that the supplied profiles in the ETL are to be seen as examples
only.
____________________________________________________________________________________________________
17.8.0
Added is_producer() and is_consumer() to the message router interface.
Deprecated is_null_router()
Added more ETL macros for C++ attributes.
____________________________________________________________________________________________________
17.7.0
Added etl::message_producer type.
____________________________________________________________________________________________________
17.6.0
etl::array_view is non-mutable by default.
Mutable functionality is enabled by defining ETL_ARRAY_VIEW_IS_MUTABLE
____________________________________________________________________________________________________
17.5.0
Modified etl::message_packet to allow default construction, copy/move construction
and copy/move assignment.
____________________________________________________________________________________________________
17.4.3
Changed local 'work' variables from uint_least8_t to uint32_t to avoid possible overflow.
Fixed misspelt scheduler policies. Typedef'd old names for backwards compatibility.
____________________________________________________________________________________________________
17.4.2
Make etl::span::subspan functions compatible with C++11 constexpr
____________________________________________________________________________________________________
17.4.1
Removed double definition of default case in switch.
____________________________________________________________________________________________________
17.4.0
Added etl::span
____________________________________________________________________________________________________
17.3.0
Added move_iterator wrapper class.
____________________________________________________________________________________________________
17.2.0
Added move API to unordered map and set containers.
____________________________________________________________________________________________________
17.1.2
Created scheduler example project.
____________________________________________________________________________________________________
17.1.1
Created CMakeLists.txt files for QueuedFSM and QueuedMessageRouter example projects.
____________________________________________________________________________________________________
17.1.0
Removed ETL's implementation of nullptr for pre C++11 compilers and created the macro
ETL_NULLPTR for internal use. Equates to NULL or nullptr, dependent on the compiler
version and project profile.

Added partial compile time versions of binary_fill and has_zero_byte.
____________________________________________________________________________________________________
17.0.0
Recoded binary_fill, has_zero_byte and has_byte_n as runtime functions to fix
compiler compatibilty issues. All functions may be constexpr if the compiler supports it.
Added tests for binary constextr functions.

Added option to define ETL_NO_64BIT_TYPES macro if the compiler does not support 64bit types.
Conditional compilation macros added to affected files.

Added iterator copy constructors to etl::deque.

Added code for ARM5 compiler compatibility in limits.h

Simplified conditional compilation for nullptr definition.

Changes to assign() in etl::string_view for compiler compatibility

Changes to container iterators for compiler compatibility.
____________________________________________________________________________________________________
16.8.1
Fixed C++03 compatibility issues nullptr.h, binary.h & string_view.h
Fixed warning
____________________________________________________________________________________________________
16.8.0
Extracted message_packet from etl::message_router for use as an independant class.
____________________________________________________________________________________________________
16.7.1
Fix C++03 compatibility issues in memory.h and utility.h
____________________________________________________________________________________________________
16.7.0
Updates to make unique_ptr similar to std::unique_ptr
Fixed unique_ptr swap() compilation issue
Added mutex for FreeRTOS
____________________________________________________________________________________________________
16.6.1
etl::exchange modified for better C++03 compatibility
____________________________________________________________________________________________________
16.6.0
rvalue reference support for heap functions and etl::priority_queue
____________________________________________________________________________________________________
16.5.3
type_traits.h is_one_of fix for C++03
____________________________________________________________________________________________________
16.5.2
Modified nullptr.h for better cross compiler compatibility
Removed redundant includes for etl::array
____________________________________________________________________________________________________
16.5.1
Removed redundant include
Moved move_s definitions to avoid forward declaration
____________________________________________________________________________________________________
16.5.0
has_value() added to etl::optional
____________________________________________________________________________________________________
16.4.4
Added #if ETL_CPP11_SUPPORTED around etl::is_rvalue_reference
____________________________________________________________________________________________________
16.4.3
Rearranged where etl::swap is defined to fix issues with certain compilers
Fixed most warnings for CLang
____________________________________________________________________________________________________
16.4.2
Fix etl::pair error and warning.
____________________________________________________________________________________________________
16.4.1
Moved icache.h to 'experimental' folder.
Removed atomic.h from 'experimental' folder.
____________________________________________________________________________________________________
16.4.0
Added rvalue references and 'move' API to all containers, except etl::priority_queue
and etl::variant
____________________________________________________________________________________________________
16.3.0
Added parity checksum to checksum.h.
____________________________________________________________________________________________________
16.2.1
Updated QueuedMessageHandler example
____________________________________________________________________________________________________
16.2.0
Added etl::heap_sort to algorithms.
____________________________________________________________________________________________________
16.1.0
Added compile time option to make string truncation an error.
Define ETL_STRING_TRUNCATION_IS_ERROR to enable.
____________________________________________________________________________________________________
16.0.0
Refactored the ETL's relationship with the STL
Many reverse engineered STL algorithms and traits are now available through the
ETL namespace.
When ETL_NO_STL is defined, the ETL implements its own versions of the STL code.
When ETL_NO_STL is *not* defined, the ETL act as a wrapper around the STL implementations.
____________________________________________________________________________________________________
15.5.0
Added the ability to self determine the compiler type, version and language support
by defining ETL_AUTO_DETERMINE_COMPILER_INFO or including the 'auto.h' profile.
Added support for C++11's 'alignas' and 'alignof'
Changed 'memcpy' to 'memmove' in alternate STL algorithms.
____________________________________________________________________________________________________
15.4.2
Fix visitor overridden test virtual visit function parameters
Reduced warnings in unit tests for CLang
Updated type_traits_generator
Added explicit construction from string_view
____________________________________________________________________________________________________
15.4.1
Move ETL_NODISCARD definition to ETL_CPP17_SUPPORTED test
____________________________________________________________________________________________________
15.4.0
Refactored CRC classes for better code sharing and reduced resource requirements
Added new CRC definitions
____________________________________________________________________________________________________
15.3.1
Changes to alternate STL limits.h for ARM5 compiler compatibility
____________________________________________________________________________________________________
15.3.0
Added etl::make_string_with_capacity
____________________________________________________________________________________________________
15.2.1
Compile time optimisations to etl::make_string
____________________________________________________________________________________________________
15.2.0
Added function adaptors and removed built-in sort functions from indirect_vector.
Added etl::make_string for all string types.
____________________________________________________________________________________________________
15.1.0
Fixes to the conditional compilation of choose_tag_types.h and
choose_pair_types.h to take into account ETL_NO_STL.
____________________________________________________________________________________________________
15.0.0
Unit tests and library code updated so that the ETL may be compiled and tested
with and without STL support.
____________________________________________________________________________________________________
14.38.2
Added alternate 'No STL' reverse_iterator unit tests.
Fixed missing equality operator for reverse_iterator.
____________________________________________________________________________________________________
14.38.1
Added missing C++11 specific conditional compilation in callback_timer.h
____________________________________________________________________________________________________
14.38.0
Added optional to force string and string_view construction from character
pointers to be explicit.
____________________________________________________________________________________________________
14.37.2
Added assert.h include to memory.h
____________________________________________________________________________________________________
14.37.1
Fix to the return value of alternate STL 'copy'
Added delegate option to callback_timer
____________________________________________________________________________________________________
14.37.0
Added etl::indirect_vector
____________________________________________________________________________________________________
14.36.0
Added wchar_t, u16 and u32 version of the 'set from string' function.
____________________________________________________________________________________________________
14.35.5
Bug fix for etl::multiset & etl::multimap erase.
____________________________________________________________________________________________________
14.35.4
Bug fix for etl::set & etl::map lower_bound.
____________________________________________________________________________________________________
14.35.3
Added assert when calling uninitialised delegate.
____________________________________________________________________________________________________
14.35.2
Fixed incorrect result when rounding up to integral part.
____________________________________________________________________________________________________
14.35.1
Fixed incorrect result for negative float to string.
____________________________________________________________________________________________________
14.35.0
Changed namespace for alternate ETL's STL support.
____________________________________________________________________________________________________
14.34.1
Fixed strict aliasing bug for -O3 optimisation in etl::pool
____________________________________________________________________________________________________
14.34.0
Fix alternate STL utility.h for ARM6
Added ARM7 profiles.
____________________________________________________________________________________________________
14.33.0
Updated unit tests to C++17
____________________________________________________________________________________________________
14.32.0
Added Platform IO example
____________________________________________________________________________________________________
14.31.2
More PIO json tweaks
____________________________________________________________________________________________________
14.31.1
Fix error in PIO json
____________________________________________________________________________________________________
14.31.0
Removed C timer library
____________________________________________________________________________________________________
14.30.0
Allow conan's etl version metadata to automatically update via git tags
____________________________________________________________________________________________________
14.29.4
Fixed unordered_map iterator operator* return type
____________________________________________________________________________________________________
14.29.3
Minor updatess for etl::delegate
____________________________________________________________________________________________________
14.29.2
Fixed incorrect results returned from pointers for atomic_gcc_sync
____________________________________________________________________________________________________
14.29.1
Added #include "stl/utility.h" to etl::optional
____________________________________________________________________________________________________
14.29.0
Added const parameters and ETL_CONST_EXPR to etl::array_view
____________________________________________________________________________________________________
14.28.3
Removed redundant etl::const_array_view
____________________________________________________________________________________________________
14.28.2
Various fixes.
void assign(const_pointer, size_t) did not set the truncation flag.
Fixed resize(0) error for etl::forward_list
Removed erroneous pointers in etl::unordered_map::begin()
____________________________________________________________________________________________________
14.28.1
Optimisation of floating point specialisations of etl::cumulative_moving_average.
____________________________________________________________________________________________________
14.28.0
Added runtime sample size specialisations to etl::cumulative_moving_average.
____________________________________________________________________________________________________
14.27.1
Removed ETL_IF_CONSTEXPR from etl::message_timer 'tick()'
____________________________________________________________________________________________________
14.27.0
ETL's random number generators are now non-polymorphic by default.
Define ETL_POLYMORPHIC_RANDOM to enable previous functionality.
____________________________________________________________________________________________________
14.26.8
Moved global operators to ETL namespace.
____________________________________________________________________________________________________
14.26.7
Compatibility changes for GCC v5.4.
____________________________________________________________________________________________________
14.26.6
Added variadic parameters to observer notification.
____________________________________________________________________________________________________
14.26.5
Fixed misplaced semicolon in error_handler.h
____________________________________________________________________________________________________
14.26.4
FSM test example fix.
____________________________________________________________________________________________________
14.26.3
A few small optimisations to binary.h
____________________________________________________________________________________________________
14.26.2
Added #include <new> to files using 'placement new'.
____________________________________________________________________________________________________
14.26.1
Simplified 'to_string' templates.
____________________________________________________________________________________________________
14.26.0
Simplified message framework internal code.
Additional receive() virtual function overload taking destination id.
Removed is_bus() member function.
____________________________________________________________________________________________________
14.25.0
Added variadic template versions of etl::largest, etl::largest_type,
etl::largest_alignment and etl::smallest
____________________________________________________________________________________________________
14.24.2
Fixed bug in 'vector of pointers' move constructor.
____________________________________________________________________________________________________
14.24.1
Added compile time functor version of 'create()'.
____________________________________________________________________________________________________
14.24.0
Added 'delegate' and 'delegate_service'.
____________________________________________________________________________________________________
14.23.1
Added missing 'cleanup' to string's resize() method.
____________________________________________________________________________________________________
14.23.0
Added an optional secure mode to strings so that unused space will be cleared to zero
and also cleared on destruction.
____________________________________________________________________________________________________
14.22.1
Modified memory functions so that they will not be optimised away.
____________________________________________________________________________________________________
14.22.0
Added etl::memory_clear and etl::memory_set utility functions.
These functions will overwrite the memory allocated to the supplied object.
____________________________________________________________________________________________________
14.21.0
Added variadic min and max functions.
etl::multimin
etl::multimin_compare
etl::multimin_iter
etl::multimin_iter_compare
etl::multimax
etl::multimax_compare
etl::multimax_iter
etl::multimax_iter_compare
C++11 only.
____________________________________________________________________________________________________
14.20.0
Added etl::multi_array for multi-dimensional arrays.
C++11 only.
____________________________________________________________________________________________________
14.19.0
Added 'emplace' to etl::optional.
C++03 & C++11 variants supplied depending on compiler support.
____________________________________________________________________________________________________
14.18.4
Fixed bug in fractional part for floating point with leading zeros after the decimal point.
____________________________________________________________________________________________________
14.18.3
Unified 'to string' API.
____________________________________________________________________________________________________
14.18.2
Finalised 'to string'.
____________________________________________________________________________________________________
14.18.1
Changed etl::format_sepc template to etl::basic_firmat_spec.
Created individual format_spec typedefs for each string type.
____________________________________________________________________________________________________
14.18.0
Added etl::to_string, etl::to_wstring, etl::to_u16string and etl::to_u32string
plus formating support for integrals.
____________________________________________________________________________________________________
14.17.0
Added C++11 variadic templates for etl::observer.
____________________________________________________________________________________________________
14.16.0
Added C++11 variadic templates for etl::visitable and etl::visitor.
____________________________________________________________________________________________________
14.15.0
Added external buffer support for vector.
____________________________________________________________________________________________________
14.14.2
Modified 'truncated' to only be cleared on 'clear()' or 'assign()'.
Added assignment from zero terminated string pointer.
____________________________________________________________________________________________________
14.14.1
Fixed bug where 'truncated' was not always set correctly for strings.
____________________________________________________________________________________________________
14.14.0
Fixed string push_back() bug where the internal terminator was not updated.
Basic Conan package added.
Added const ref istring constructors.
Updated profiles for C++17.
____________________________________________________________________________________________________
14.13.1
Modified etl::queue_spsc_locked parameters to 'const'.
____________________________________________________________________________________________________
14.13.0
Added etl::queue_spsc_locked with injected locking functions.
____________________________________________________________________________________________________
14.12.0
Enabled emplace functions for 'No STL'.
____________________________________________________________________________________________________
14.11.3
Moved C++03 force macros to test profile.
____________________________________________________________________________________________________
14.11.2
Fix inconsistent ETL_FILE definitions.
____________________________________________________________________________________________________
14.11.1
Fix 'force C++03' macros leftover from testing.
____________________________________________________________________________________________________
14.11.0
Added rvalue reference interfaces to forward_list.
____________________________________________________________________________________________________
14.10.2
Fix for unordered_multimap, unordered_set and unordered_multiset insert and erase bug.
____________________________________________________________________________________________________
14.10.1
Fix for unordered_map insert and erase bug.
____________________________________________________________________________________________________
14.10.0
Added ETL_NOEXCEPT macros.
Added std::forward support to alternate STL utility header.
____________________________________________________________________________________________________
14.9.0
Added constexpr constructors to string_view and array_view.
____________________________________________________________________________________________________
14.8.2
Added missing #include "stl/interator.h" in frame_check_sequence.h
____________________________________________________________________________________________________
14.8.1
Fixed bug for certain inserts in etl::vector
____________________________________________________________________________________________________
14.8.0
Added etl::callback_service
Useful for abstracting the interrupt system from C++ handlers.
____________________________________________________________________________________________________
14.7.2
Added #include <new> to message_router.h for improved cross platform compatibility.
____________________________________________________________________________________________________
14.7.1
Rvalue reference C++-03/C++11 compatibility fix.
____________________________________________________________________________________________________
14.7.0
Continuing updates for adding rvalue reference API to the containers.
etl::deque
etl::list
etl::vector
____________________________________________________________________________________________________
14.6.1
Fixed bugs in etl::flat_map 'operator[]' and 'insert'.
____________________________________________________________________________________________________
14.6.0
Added etl::scaled_rounding to allow selection of rounding algorithms when
emulating fixed point arithmetic with scaled integral values.

Added etl::cumulating_moving_average, implementing an algorithm for
calculating an average for a stream of samples. There are specialisations
for floating point and scaled integral sample types.

Added C++11 rvalue reference 'push' functions for etl::deque.
____________________________________________________________________________________________________
14.5.1
Fixed deque pushes for literals.
____________________________________________________________________________________________________
14.5.0
Added move algorithms and utility to 'alternate' STL.
Added rvalue reference API to etl::deque.
____________________________________________________________________________________________________
14.4.0
Added C++03/C++11 emplace for deque, priority_queue, queues, stack, variant & vector.
____________________________________________________________________________________________________
14.3.0
etl::forward_list supports shared pools.
____________________________________________________________________________________________________
14.2.0
Added 'don't care current state' transition entry option.
____________________________________________________________________________________________________
14.1.0
Added hash based random number generator
____________________________________________________________________________________________________
14.0.0
The ETL is now 'all header'.
____________________________________________________________________________________________________
13.0.0
Added bit stream serialiser/deserialiser
____________________________________________________________________________________________________
12.1.1
Added random_pcg Permuted Congruential Generator
____________________________________________________________________________________________________
12.0.1
Modified state_chart to accept recursive events.
Made start() virtual.
____________________________________________________________________________________________________
12.0.0
Modified the API of etl::state_chart constructors.
____________________________________________________________________________________________________
11.19.0
Removed push(void) push_back(void) and push_front(void) function for containers.
____________________________________________________________________________________________________
11.18.0
Added CRC16 MODBUS
____________________________________________________________________________________________________
11.17.1
Swapped event and current state parameters for transition constructor.
____________________________________________________________________________________________________
11.17.0
Added etl::state_chart
____________________________________________________________________________________________________
11.16.6
Fixed implementations of key_comp and value_comp for maps and sets
____________________________________________________________________________________________________
11.16.5
Added 'ull' suffix to 64bit literals
____________________________________________________________________________________________________
11.16.4
Fixed nullptr compatibility for ARM5 compiler.
____________________________________________________________________________________________________
11.16.3
Fixed missing algorithms for No STL  option.
Improved Keil compatibility.
____________________________________________________________________________________________________
11.15.1
io_port_test Fixed unaligned access error.
debug_count  Removed typed += & -= operators and replaced with templates.
____________________________________________________________________________________________________
11.15.0
Added 'memory model' selection for queues to allow more efficient implementations.

Maximum queue sizes:
MEMORY_MODEL_SMALL   255 (254 for queue_spsc_atomic)
MEMORY_MODEL_MEDIUM  65535
MEMORY_MODEL_LARGE   2147483647
MEMORY_MODEL_HUGE    9223372036854775807

Fixed syntax errors highlighted by GCC v8
____________________________________________________________________________________________________
11.14.2
Removed reference_flat_set & reference_flat_map reliance on equality.
____________________________________________________________________________________________________
11.14.1
Removed flat_set & flat_map reliance on equality.
____________________________________________________________________________________________________
11.14.0
Added tests for limited support for self insert for strings.
Added 'wipe_on_destruct' template class for secure wiping of objects on destruction.
Updated unique_ptr API.
____________________________________________________________________________________________________
11.13.2
Protected destructor for some FSM classes.
Observer's remove_observer returns bool.
____________________________________________________________________________________________________
11.13.1
Fixed vector of pointer typedefs
____________________________________________________________________________________________________
11.13.0
Added specialisation for vector<const T*>
____________________________________________________________________________________________________
11.12.2
Remove SFINAE from array_view.
Added default etl::less compare type appropriate map and set classes.
Moved non-template code in pvoidvector to cpp file.
____________________________________________________________________________________________________
11.12.1
Made atomic load const for non STL vesions
____________________________________________________________________________________________________
11.12.0
Renamed STATIC_ASSERT to ETL_STATIC_ASSERT
Removed non-conforming std::nullptr
____________________________________________________________________________________________________
11.11.1
Compatibilty changes for Segger IDE, GCC & STLPort
____________________________________________________________________________________________________
11.11.0
Compatibilty changes for Segger IDE, GCC & STLPort
____________________________________________________________________________________________________
11.10.0
Merged CMake branch
____________________________________________________________________________________________________
11.9.2
Fixed compile error when ETL_DEBUG_COUNT is not defined.
____________________________________________________________________________________________________
11.9.1
Fix Github issue #73 (Timers)
____________________________________________________________________________________________________
11.9.0
Added CRC32-C (Castagnoli)
____________________________________________________________________________________________________
11.8.0
Added more binary utilities.
binary_fill
has_zero_byte
has_byte_n
____________________________________________________________________________________________________
11.7.0
Modified header guards.
Added etl::type_select
Added etl::null_type
____________________________________________________________________________________________________
11.6.0
Added capacity() to etl::queue
Prefixed max_size() and capacity() with ETL_CONSTEXPR in all queue types.
____________________________________________________________________________________________________
11.5.0
Added etl::permutations and etl::combinations constant templates.
____________________________________________________________________________________________________
11.4.0
Added improved atomics.
Added mutex
Added SPSC & MPPC queues
____________________________________________________________________________________________________
11.3.0
Improved compatibility with 64 bit pltforms.
____________________________________________________________________________________________________
11.2.0
Added std::initializer_list constructors to containers, if ETL_CPP11_SUPPORTED is set to 1
____________________________________________________________________________________________________
11.0.1
Added reset() to etl::optional
____________________________________________________________________________________________________
11.0.0
New directory structure.
C & CPP files in src/
H files in include/etl/
____________________________________________________________________________________________________
10.21.2
Added version.h
____________________________________________________________________________________________________
10.21.1
Removal of GCC warnings from variant.h.
____________________________________________________________________________________________________
10.21.0
Completion of operator set for etl::optional
Removal of more GCC warnings when using -Wextra.
____________________________________________________________________________________________________
10.20.0
Rewrite of debounce code to factor out commonality.
Made interrupt locks in C timer framework to match that of C++ version.
Improved etl::endianness. Added static functions.
____________________________________________________________________________________________________
10.19.2
Fixed strict aliasing warnings for endianess.
____________________________________________________________________________________________________
10.19.1
Fixed strict aliasing warnings for aligned storage.
____________________________________________________________________________________________________
10.19.0
Added 'create' and 'destroy' functions to pools.
Modified class heirarchy.
etl::generic_pool is derived from on etl::ipool.
etl::pool is derived from etl::generic_pool.
____________________________________________________________________________________________________
10.18.1
Reduced disable/enable time during function calls.
____________________________________________________________________________________________________
10.18.0
Improvements to message and callback timer frameworks.
Reduced disable/enable time during function calls.
Added the option to use either atomic semaphores or interrupt enables to control access.
____________________________________________________________________________________________________
10.17.0
Added emplace functions to etl::variant.
____________________________________________________________________________________________________
10.16.1
Improved performance of emplace for value_type parameters.
____________________________________________________________________________________________________
10.16.0
Added emplace member functions to flat_map, flat_multimap, flat_set and flat_multiset
____________________________________________________________________________________________________
10.15.0
Added protected destructors to FSM & message_timer and code to message router packet destructor to choose
correct method of destruction.
____________________________________________________________________________________________________
10.14.0
Added variant_pool generator.
____________________________________________________________________________________________________
10.13.0
There was no version 10.13.0
____________________________________________________________________________________________________
10.12.0
Re-written to avoid 'undefined behavior' by allowing containers to be polymorphic or not base on a compile time
macro.
____________________________________________________________________________________________________
10.11.2
GCC compatibility changes.
____________________________________________________________________________________________________
10.11.1
GCC compatibility changes.
____________________________________________________________________________________________________
10.11.0
Added ETL_CONSTEXPR macro and applied to various functions.
Allows C++11 and above compilers to set functions as constexpr.
____________________________________________________________________________________________________
10.10.0
Added array_wrapper
____________________________________________________________________________________________________
10.9.0
Array view
  Added array_view.
____________________________________________________________________________________________________
10.8.1
Pool
  Changed alignof to etl::alignment_of
____________________________________________________________________________________________________
10.8.0

Added etl::variant_pool as a replacement for etl::factory.
Deprecated etl::factory

etl::forward_list
  Renamed include guard to avoid clash with list.

Removed factory from unit tests.

multimap & multiset
  Changed static const to enum.

hash & strings
  Removed default function template parameter value.

FSM
  Moved get_fsm_context() from public to protected in etl::state

Binary
  Added sign_extend functions with shift parameter.
  Added new binary.cpp for non-template functions.
  Added bit<> template constant
  Added bit enumerations

Debug count
  Added clear()

Type lookup
  Simplified codebase

Message router
  Added 'successor' member to allow implementation 'Chain Of Responsibility' pattern.

IO Ports
  Changes value() to read().
  Rewrite of classes to improve efficiency by removing iterator indirection step.
  Fixed inconsistencies in the dynamic IO port API.

Type traits
  Added 'conditional_integral_constant' to complement 'conditional'