#![crate_type ="lib"]#[doc(alias ="foo")]// ok!#[doc(alias("bar","baz"))]// ok!pub struct Bar;#[doc(alias ="")]// { dg-error "invalid character used" "" { target *-*-* } .-1 }pub struct Foo;#[doc(alias(""))]// ko but unchecked for nowpub struct Foo2;#[doc(whatever ="buidule")]// ko as well but unchecked for nowstruct Boo;