The C++14 standard is often referred to as a bugfix for C++11. It contains only a limited list of changes of which most are extensions to the new features in C++11. Below you can find an overview of the changes as they have been grouped on the isocpp FAQ with links to more detailed documentation.

Language Extensions

• Binary literals
• Generalized return type deduction
• decltype(auto)
• Generalized lambda captures
• Generic lambdas
• Variable templates
• Extended constexpr
• The [[deprecated]] attribute
• Digit separators

Library Extensions

• Shared locking
• User-defined literals for std:: types
• [std::make_unique](<http://en.cppreference.com/w/cpp/memory/unique_ptr/make_unique>)
• Type transformation _t aliases
• Addressing tuples by type (e.g. get<string>(t))
• Transparent Operator Functors (e.g. greater<>(x))
• [std::quoted](<http://en.cppreference.com/w/cpp/io/manip/quoted>)

Deprecated / Removed