Go编程语言中的任何类型和实现通用列表

Question

I'm trying a little of go programming language.

I'm a excited about the simplicity of the Go, but after playing with it I met some troubles.

1 . I know that Go doesn't support generics and inheritance. Is there any way to implement generic list?

I thinking about using:

type Any interface { }

but how can I check if the value is NULL.
I'm looking for some equivalent implementation to C

struct List {
  List* tail;
  void* head;
}

Or using algebraic datatype:

data List a = Nil | Cons a (List a)

2 . More advanced requirement would be to make some container for objects with a field of a particular type?
For example in Scala programming language I can type:

val List[Animal { type SuitableFood = Grass} ]

to get a List of Animals, which have a member type SuitableFood which is Grass

Answer 1

It sound's like what you're trying to make is a linked list.

Here's an example of one included with golang:
http://golang.org/pkg/container/list/

And here's the source code:
http://golang.org/src/pkg/container/list/list.go