A C++ template library for embedded applications
MIT licensed
Designed and
maintained by
John Wellbelove



template <typename T>
class initializer_list

The initializer_list template class is a special case in that it must have a definition that is compatible with what the
compiler expects. It must also be defined under the std namespace.

This header will either include the standard <initializer_list> header, or attempt to define a std::initializer_list
template class that is compatible with the current compiler.

The header will define ETL_USING_INITIALIZER_LIST to either 1 or 0 dependant of whether std::initializer_list is
available or not.

The ETL will select the STL version if you are using the STL and ETL_FORCE_ETL_INITIALIZER_LIST is not defined or,

The ETL's version will be selected if you are not using the STL or ETL_FORCE_ETL_INITIALIZER_LIST is defined.

What issues might I come across?

If you are not using the STL, and one of the system headers or libraries that you include reference the standard
initializer_list definition then the compiler will complain of duplicate definitions. In this case you will have to force
the ETL to use the STL definition. There are two macros that force selection of one or other definition.

Define one of these macros to force the selection.

Defining ETL_NO_INITIALIZER_LIST will disable the use of std::initializer_list for the ETL.

If you get "No definition for initializer_list is currently available for your compiler. Visit
https://github.com/ETLCPP/etl/issues to request support", it may be that neither of the ETL definitions of
initializer_list are compatible with your compiler. In that case please raise an issue here. Alternatively, your
compiler may be compatible with GCC/clang. Try adding the compiler's Identifier macro to the conditional compilation