Function in namespace - multiple definition

[elelont2]

Hi, i cannot figure this out: hpp:

namespace ContractStorage
{
std::string DoIt(ContractName c); // Declaration
}

cpp:

namespace ContractStorage
{
std::string DoIt(ContractName c)
{
printf("yes");
}
}

It says: multiple definition of `ContractStorage::DoIt(ContractStorage::ContractName)' How can this be, i only have the decalaration in the hpp file? I have a class declaration in the same file, it does not complain about that...

[Lost User]

There must be something else that is causing this that is external to your header file. I just tried that and it compiled without error. Does the error message give you any line numbers?

[elelont2]

I noticed that the issue only occurs when i use "_" as function name. When i set it to something else it will work. My namespace was named the same as my class, is it possible that the compiler did not detect the ambiguity?

[Lost User]

Well for some reason (that cannot be seen from what you have provided), the function is being defined in more than one place. You need to go through all your code again to see where.

[Albert Holguin]

Off the top of my head, one thing that may cause this message would be if you #include the header in multiple locations and have no header guards (either pragma once directive or #ifndef/#define/#endif method).