C++ TR1 和 C++0x

  C++ Technical Report 1 (TR1)是ISO/IEC TR 19768, C++ Library Extensions（函式库扩充）的一般名称。TR1是一份文件，内容提出了对C++标准函式库的追加项目。这些追加项目包括了正则表达式、智能指针、哈希表、随机数生成器等。TR1自己并非标准，他是一份草稿文件。然而他所提出的项目很有可能成为下次的官方标准。这份文件的目标在于「为扩充的C++标准函式库建立更为广泛的现成实作品」。

  C++ tr1是针对C++标准库的第一次扩展。即将到来的下一个版本的C++标准c++0x会包括它，以及一些语言本身的扩充。tr1包括大家期待已久的smart pointer，正则表达式以及其他一些支持范型编程的东东。草案阶段，新增的类和模板的名字空间是std::tr1。

  C++ Technical Report 1 (TR1) is the common name for ISO/IEC TR 19768, C++ Library Extensions, which is a document proposing additions to the C++ standard library. The additions include regular expressions, smart pointers, hash tables, and random number generators. TR1 is not a standard itself, but rather a draft document. However, most of its proposals are likely to become part of the next official standard. In the meantime, vendors can use this document as a guide to create extensions. The report’s goal is “to build more widespread existing practice for an expanded C++ standard library.”

C++0x (pronounced see plus plus oh ex)[1] is the unofficial name of the planned new standard for the C++ programming language. It is intended to replace the existing C++ standard, ISO/IEC 14882, which was published in 1998 and updated in 2003. These predecessors are informally known as C++98 and C++03. The new standard will include several additions to the core language and will extend the C++ standard library, incorporating most of the C++ Technical Report 1 (TR1) libraries — most likely with the exception of the library of mathematical special functions.

using std::tr1::function

• 2010年10月14日 6:35

  Silver_Gates

  This is a simple example of using std::tr1::function. Thq question is at the end of the code..

  #include "stdafx.h"
  #include
  #include
  #include
  
  //using std::tr1::function;
  typedef std::tr1::function< long (int,int) >Callback;
  typedef std::vector Callbacks;
  Callbacks callbacks;
  
  
  long myfunction(int a,int b)
  {
  std::cout << "Function Called \n";
  return 12;
  }
  
  int _tmain(int argc, _TCHAR* argv[])
  {
  //Now callbacks is a vector lets resize it
  callbacks.resize(1);
  
  //Now store address of myfunction in callback
  
  callbacks[0]= &myfunction;
  
  
  //Now call the function using the cector and passing 5 as parameter
  Callback& callback = callbacks[0];
  
  std::cout << callback(12,14);
  
  std::cin.get();
  return 0;
  }
  
  However i have two questions:
  
  1)in which scenario would we get something like
  
  typedef std::function< void (ME*, typename traits< t >::ContentType ) > Callback;
  
  what does Me mean and what could the function be like?/
  
  2)in which scenario would we use it like this
  
  callback( this, content ); //?? what is content ???
  
  any ideas would be great !!!

  A candle loses nothing by lighting another candle.