“undefined reference to”c++ template

You need to use theexportkeyword. However, I don't think G++ has proper support, so you need to include the template function's definition in the header so the translation unit can use it. This is because the<int>'version' of the template hasn't been created, only the<typename T>'version.'

An easy way is to#includethe .cpp file. However, this can cause problems, e.g. when other functions are in the .cpp file. It will also likely increase the compile time.

A clean way is to move your template functions into its own .cpp file, and include that in the headeroruse theexportkeyword and compile it separately.

c++中template不支持声明和实现分别放在不同的文件中。可以通过include cpp文件解决这个问题。

原文链接: https://www.cnblogs.com/xuqiang/archive/2010/11/27/1953377.html

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