整个C ++ STL代码被包括在.h而不是.cpp / .c文件中的原因是什么？ [英] What is the reason for the entire C++ STL code to be included in the .h rather than .cpp/.c files?

问题描述

我刚刚下载了STL源代码，我注意到STL模板类的所有定义都包含在.h文件中。函数定义的实际源代码位于.h文件中，而不是.cpp / .c文件中。这是什么原因？

I just downloaded the STL source code and I noticed all the definition for the STL template classes are included in the .h file. The actual source code for the function definition is in the .h file rather than .cpp/.c file. What is the reason for this?

http://www.sgi.com/tech/stl/download.html

推荐答案

因为很少编译器实现模板的链接。这很难。

Because very few compilers implement linking of templates. It's hard.

这里有一个简短的但是（我认为）信息文章： http://www.informit.com/guides/content.aspx?g=cplusplus&seqNum=53

Here's a brief but (I think) informative article about it: http://www.informit.com/guides/content.aspx?g=cplusplus&seqNum=53

我说我想，因为它真的不是我非常熟悉的东西，除非它广泛未实现。我最初说的标准不需要它，但看看导出的定义在C ++ 03，我没有看到任何迹象，它是可选的。也许这只是一个失败的标准。

I say "I think" because it's really not something I'm very familiar with other than that it's widely unimplemented. I initially said the standard didn't require it, but looking at the definition of "export" in C++03, I don't see any indication that it's optional. Maybe it's just a failed standard.

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