c++0x的一些新特性

先看一个简单的例子对比

 

//old

      std::list<int> l;

      std::list<int>::iterator it = l.begin();

 

//new

      std::list<int> l;

      auto it = l.begin();

 

很酷吧？auto原来是生命自动变量（局部变量）的关键词，在c++0x中有了新的含义

 

c++0x是新一代的c++标准，引入了许多值得期待的特性。目前gcc4.4以上版本和vs2010实现了其大多数特性。

可以从下面链接的FAQ中对c++0x的新特性做一个简单的了解。

 

http://www2.research.att.com/~bs/C++0xFAQ.html

 

• The new libraries without features that depends on new language facilities (e.g. variadic templates and constexpr )
• Simple and simple to implement features that help users in small but noticeable ways:
  • auto
  • enum class
  • long long
  • nullptr
  • right brackets
  • static_assert
• language features that help implement the C++0x standard libraries (enabling an upgrade/improvement of the standard libraries):
  • constexpr
  • initializer lists
  • general and uniform initialization (incl. the prevention of narrowing )
  • rvalue references
  • variadic templates
  • a version of the standard library with all of these features used
• Features related to concurrency:
  • memory model
  • thread_local
  • atomic types
  • local types as template arguments
  • lambdas
  • a version of the standard library with complete concurrency support
  • PODs (generalized)

 

从下面的链接中可以获得gcc对c++0x的支持的相关信息

http://gcc.gnu.org/projects/cxx0x.html

 

从下面的wiki链接，可以得到更全面的信息，和一些简单的代码例子

http://en.wikipedia.org/wiki/C%2B%2B0x