[go-nuts] Embedding a map in a struct

There are several ways:

http://play.golang.org/p/sZqVHPGdNl

El miércoles, 28 de noviembre de 2012 23:13:37 UTC, Dustin Norlander
escribió:

meh, except that isn't really extending it

http://play.golang.org/p/ozwnBJm26p <--- he probably wants the doesn't
work example

--

El miércoles, 28 de noviembre de 2012 23:32:53 UTC, bryanturley escribió:
http://play.golang.org/p/Bl2O3FbNoV

--

Thanks guys. Looks like what I wanted just isn't possible. good to know.

-Dustin

Indeed, that is why I defined Get() and Set() and showed and example of
their use.

--

El miércoles, 28 de noviembre de 2012 23:57:45 UTC, bryanturley escribió:
Of course, and I'm sure that the OP would know add a methods to a structs
already implemented like in mi examples.

--

You can't extend map, you can use it in a struct and use the struct as a
non built-in map though.

http://play.golang.org/p/Rj-JrHKdAf

don't use interface {} if you can use something specific


--

What you're suggesting is embedding an unnamed type. Since brace, bracket,
and asterisk characters are not valid identifier characters, you couldn't
access the underlying field anyway --

m := MyMap{}
m.*map[string]interface{}["something"]

That would be a syntax error.

You can embed any unnamed type:

type underlyingmap map[string]interface{}

type MyMap struct {
underlyingmap
SomeField string
}

m := MyMap{}
m.underlyingmap["something"]

The above should work.