Why is there a "new" in Go?

Posted by dystroy on Programmers See other posts from Programmers or by dystroy
Published on 2013-09-04T07:31:19Z Indexed on 2013/11/05 10:11 UTC
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I'm still puzzled as why we have new in Go.

When you want to instantiate a struct, you do

t := Thing{}

and, obviously, you can get a pointer to a new instance by doing

t := &Thing{}

But there's also this possibility :

t := new(Thing)

This last one seems a little alien to me. &Thing{} is as clear and concise as new(Thing) and it uses only constructs you often use elsewhere. It's also more extensible as you might change it to &Thing{3} or &Thing{Feets:7}.

In my opinion, having a supplementary keyword is costly, it makes the language more complex and adds to what you must know. And it might mask to newcomers what's behind instantiating a struct.

It also makes one more reserved word.

So what's the reasoning behind new ? Is it something useful ? Should we use it ?

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