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分类: C/C++

2012-08-03 18:11:12

  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.

已答复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.
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