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I must be missing something obvious, thanks for the help. Coding in C++. IDE is Clion. In my main.cpp I call a Parser::parse(tokenList) function. The Parse function is declared in Parser.h as static std::string parse (std::vector<Token*>& tokenList); I define the function in Parser.cpp as std::string Parser::parse (std::vector<Token*> &tokenList){return "";} In my main.cpp file I #include "Parser.h" When I build my project I get undefined reference to 'Parser::parse(std::vector<Token*, std::allocator<Token*> >&)' Am I defining incorrectly? I have similar code with the same problem. In that example, including the .cpp file instead of the .h file resolves the issue. Why would that be (yes, I know including the .cpp is bad practice)?

Ragiarc
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  • Descriptions of code pale in comparison to code. – user4581301 Sep 28 '20 at 20:04
  • You're supposed to compile all .cpp files. – cigien Sep 28 '20 at 20:04
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