c++ - What is "using" doing in this instance, and what is being stored? -

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i have following class:

class foo{  }  class bar{ public:       using meth = foo* (*)(int a, std::string b); }

can explain line means:

     using meth = foo* (*)(int a, std::string b);

it seems me way of storing pointer constructor or something. if can explain, appreciate it.

please feel free edit question make more descriptive - if knew code did, wouldn't ask question.

the line

using meth = foo* (*)(int a, std::string b);

makes meth shorthand (type alias) lengthy function pointer type declaration.

it can used like:

foo* bar(int a, std::string b);  meth baz = bar;

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