CODEWITHSUNDEEP
c++visual-studiolinker-errors
shl mig
shl mig

Reputation: 19

What does "@@YAHXZ" mean in VS link error description?

i would like to understand the @@YAHXZ part of such an error:

Error LNK2019 unresolved external symbol "int __cdecl func2(void)" (?func2@@YAHXZ) referenced in function _main .

this is just one example but i've seen other types of strange letters i just dont remember them right now. where can i find an explanation on each of them?

Upvotes: 0

Views: 317

Answers (1)

Macmade
Macmade

Reputation: 53970

This is called «name mangling», or «name decoration».

As C++ supports function overloading, the name of the symbols are generated in a specific way, usually based on the argument's types.

Here's the official documentation on Microsoft website:
https://msdn.microsoft.com/en-us/library/56h2zst2.aspx

EDIT

Microsoft doesn't provide a complete documentation about name decoration.
If you're interested in knowing exactly what the symbols mean, I recommend reading Agner Fog's documentation on calling conventions:
http://www.agner.org/optimize/calling_conventions.pdf

Upvotes: 4

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