bind1st/bind2nd与mem_fun组合使用的问题

最新推荐文章于 2022-06-02 11:05:22 发布

转载最新推荐文章于 2022-06-02 11:05:22 发布 · 205 阅读

文章标签：

#c/c++

本文探讨了在C++中使用bind1st/bind2nd与mem_fun组合时遇到的编译错误，解释了问题原因并提供了解决方案。包括使用boost::bind代替标准库函数，接受字符串复制的性能成本，以及C++11中引入的完美转发和std::bind来解决此类问题。

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像

 
   bind1st(mem_fun1<void, queue<char>, const char &>(&queue<char>::push), &queIndexes); 
  

这种把bind1st/bind2nd与mem_fun等组合使用编译通不过的解决方法：

std::bind1st and std::bind2nd don't accept functors which take reference arguments, because they themselves form references to these arguments. You can

use pointers for your function inputs instead of references
use boost::bind
accept the performance cost of copying the string

是因为

The issue is a defect in the library specification.

Take a look at this bug report against gcc and the resulting discussion: Bug 37811 - bind1st fails on mem_fun with reference argument

C++03 lacked the facilities to build a perfect bind library. This issue is fixed in C++11 with perfect forwarding and std::bind.

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