Structs with reference fields

[felixf4xu]

Hi,

I'm reading the document of https://github.com/vlang/v/blob/master/doc/docs.md#structs-with-reference-fields, it says

Structs with references require explicitly setting the initial value to a reference value unless the struct already defines its own initial value.
Zero-value references, or nil pointers, will NOT be supported in the future

I'm fine with the language design, but I'd like to ask what's the suggested solution if I can't use nil to initialize a reference in a structure?

struct Node {
	a &Node
	b &Node = unsafe { nil } // Auto-initialized to nil, use with caution!
}

I don't like the unsafe keyword here, if I'm writing a purely v code without c interop, the word of unsafe should be avoided as much as possible, from language design point of view.

struct Node {
	a &Node
	b &Node = 0
}

What will be the designed solution in the future?

[Yaisis]

What will be the designed solution in the future?

struct Node {
	a ?&Node
	b ?&Node
}

n := Node{}
c := n.a or { ... }