The const variables "left" and "right" are const default initialized.
The C++ standard states the following:
"A class type T is const-default-constructible if default-initialization
of T would invoke a user-provided constructor of T."
Since the "left_soec" and "right_spec" structs are PODs they are not
initialized per default. Due to the "constness" the variable can not be
modified later one, therefore the POD is in a state in which it is not
useful at all.
Since the mentioned structs are empty there would be no problem
in this case. This is an issue in the C++ standard (CWG Issue 253).
Some compilers already handle this issue with their own solution
despite the fact, that the standard did not provide a solution yet.
For some exotic compilers (e.g. Tasking for TriCore) the include of
the "string_stream" header caused compilation errors:
"const variable "etl::left" requires an initializer -- class "etl::private_basic_format_spec::left_spec" has no user-provided default constructor"
References:
https://en.cppreference.com/w/cpp/language/default_initializationhttps://cplusplus.github.io/CWG/issues/253.htmlhttps://stackoverflow.com/questions/7411515/why-does-c-require-a-user-provided-default-constructor-to-default-construct-ahttps://stackoverflow.com/questions/24943665/why-is-a-constructor-necessary-in-a-const-member-struct
* #850 Fixed names according to Arduino's guidelines
* #850 Fixed names according to Arduino's guidelines
* Add support for in-place instantiation of a shared message in the message pool
---------
Co-authored-by: John Wellbelove <john.wellbelove@etlcpp.com>
Co-authored-by: John Wellbelove <jwellbelove@users.noreply.github.com>
Utilized a spell checking tool to identify and correct spelling
throughout all files in the code base.
Signed-off-by: Pisit Sawangvonganan <pisit@ndrsolution.com>
* In subspan function, add static checks on extents
* Change to ETL_STATIC_ASSERT. Add static assert for first and last functions
* Add static assert to pre c++11 subspan
* Change extent to Extent to better match existing code
