rust - Can struct-like enums be used as types? -

consider following (illegal) example:

enum foo {     bar { i: i32 },     baz, }  struct mystruct {     field: foo::bar, } 

foo::bar struct-like variant. i've found them quite useful. however, have instance need store instance of struct inside struct, above example of mystruct. changing mystruct::field foo invalid, doesn't make sense field foo::baz. it's meant instance of foo::bar.

rustc tells me above code invalid:

error: found value name used type: defvariant(defid { krate: 0u32, node: 4u32 }, defid { krate: 0u32, node: 5u32 }, true) 

am doing wrong, or not possible? if it's not possible, there plans on doing it?

i know work around this, consider inferior option , it's 1 i'd avoid if possible:

struct bar {     i: i32, }  enum foo {     bar(bar),     baz, }  struct mystruct {     field: bar, } 

in first situation,

enum foo {     bar { i: i32 },     baz, } 

as compiler tells bar not type value, , cannot used type (error: found value name used type).

you second construction used, example in standard library std::net::ipaddr , std::net::socketaddr.