This code compiles fine
package main
type node struct {
next *node
}
func main() {}
(https://play.golang.org/p/ZYg0EciQnOQ)
This code does not
package main
type node = struct {
next *node
}
func main() {}
(https://play.golang.org/p/gWWX8ngPsS6)
The error is
prog.go:3:6: invalid recursive type alias node
prog.go:3:6: node uses <T>
prog.go:3:13: <T> uses node
The specification remains silent about what is considered "invalid
recursive type alias" so I'm not sure, but it seems to me the first and
second programs should both compile fine. In both cases, so to say "the
pointer breaks the cycle" while type checking. But maybe/probably I'm
mistaken.
Can anybody enlighten me please and explain if the compiler is right or if
it's a bug?
Thanks in advance.
--
-j
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