Golang : Defer function inside init()

Putting this short note down for those intending to use defer function inside init(). IF you put a defer function inside the init() block, the deferred function will be executed regardless and not deferred. This is because the init() function role is to repair correctness or prepare the environment variables within the source file before executing other function or to be precise... the main() function block.

From the official documentation, https://golang.org/doc/effective_go.html#init :

"a common use of init functions is to verify or repair correctness of the program state before real execution begins."

The keyword is BEFORE

Reference :


  See also : Golang : When to use init() function?

By Adam Ng

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