C++ 0X feature summary cheat sheat
// based on wiki page contents: `C++ 0X`
2 Extensions to the C++ core language
3 Core language runtime performance enhancements
3.1 Rvalue reference and move semantics => chain function calling
3.2 Generalized constant expressions => constexpr
3.3 Modification to the definition of plain old data => looser POD requirement
4 Core language build time performance enhancements
4.1 Extern template => see detail on wiki, why it is necessary
5 Core language usability enhancements
5.1 Initializer lists => std::initializer_list<T>
5.2 Uniform initialization =>
5.3 Type inference => auto as function return
5.4 Range-based for-loop => for (auto x:{})
5.5 Lambda functions and expressions => C# style
[x, &y](int x, int y) -> int { int z = x + y; return z + x; }
5.6 Alternative function syntax => decltype
5.7 Object construction improvement =>
5.8 Explicit virtual function overrides => override keyword
5.9 Null pointer constant => nullptr
5.10 Strongly typed enumerations => type safety,not `int` any longer
enum class Color { red, blue, green };
5.11 Right angle bracket => good for template declear
5.12 Explicit conversion operators => explicit keyword
5.13 Template aliases => using TypedefName = SomeType<OtherType, Second, 5>;
5.14 Unrestricted unions => safe union allocated on steak
6 Core language functionality improvements
6.1 Variadic templates => template<typename… Values> class tuple;
6.2 New string literals => u8″” utf8; U”” utf32; raw string R”” ;u”” utf16
6.3 User-defined literals
=> OutputType operator “” _suffix(const char *literal_string);
6.4 Multitasking memory model => asynchronous message std::future
6.5 Thread-local storage => std::thread_local
6.6 Explicitly-defaulted and deleted special member functions
6.7 Type long long int => C99
6.8 Static assertions => static_assert(expr)
6.9 Allow sizeof to work on members of classes without an explicit object
6.10 Allow garbage collected implementations => just ABI
7 C++ standard library changes (std::tr1)
7.1 Upgrades to standard library components
Decltype ; Explicit conversion operators ; Default/Deleted functions
7.2 Threading facilities =>std::thread
7.3 Tuple types =>std::tuple<type1, type2,…>()
7.4 Hash tables => std::unordered_set/map/multimap
7.5 Regular expressions => std::regex_search(string target, std::cmatch, std::regex ) )
7.6 General-purpose smart pointers
=> 5 kinds of smart ptr <memory>, Resource Acquisition Is Initialization (RAII) idiom
7.7 Extensible random number facility => <random>
7.8 Wrapper reference => Boost.Ref <functional>- cref, ref, reference_wrapper
7.9 Polymorphic wrappers for function objects =>
7.10 Type traits for metaprogramming =>
7.11 Uniform method for computing the return type of function objects
=> Future: boost::filesystem boost::result_of Function return types
9 Features to be removed or deprecated
The term sequence point, which is being replaced by specifying that either one operation is sequenced before another, or that two operations are unsequenced.[8]
export ; exception specifications; std::auto_ptr
Function object base classes (std::unary_function, std::binary_function), adapters to pointers to functions and adapters to pointers to members, binder classes.
CC-BY-NC 4.0 licensed free for non-commercial usage
Author: Qingfeng XIA
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