STL Backports

Backporting STL to previous C++ versions, as close to the standards as possible.

Features

STL-17

Defined in stl-back/stl17/*.hpp, with namespace stl_backports::stl17.

Feature	C++14	C++11	C++03/98	Details
class optional<T>	Almost full support	Not implemented	Not implemented	operator-> is non-constexpr in C++14.
class any	Almost full support	Almost full support	Not implemented	No small-object optimization.

Compatibility

STL-17

STL-17 / C++14

Feature	GCC 6+	GCC 5*	Clang 3.5+	VC2015 (C1xx/C2)
class optional<T>	Passed	Minor issues in constexpr (GCC's bug)	Passed	N/A
class any	Passed	Passed	Passed	N/A

• * First release with full C++14 support.
• Clang 3.4 is the first release that supports C++14, however, it doesn't parse cstdio (libstdc++ 4.8) correctly.
• Visual C++ does not support C++14 yet.

STL-17 / C++11

Feature	GCC 5+	GCC 4.9	GCC 4.8*	Clang 3.3*	VC2015** (C1xx/C2)	VS2013
class any	Passed	Minor issues in testsuite (libstdc++ does not fully support C++11)	Minor issues in testsuite (libstdc++ does not fully support C++11)	Not tested	N/A	N/A

• * First release with full C++11 support.
• ** Almost full C++11 support (except for expression SFINAE and C99 preprocesser).