// by-ref binding `ref (mut) self` and sub-patterns `@` are not allowed in receivers (rejected by rustc). use std::pin::Pin; struct S {} impl S { fn take_ref_self(ref self: Pin<&mut Self>) {} //~ ERROR expected identifier, found keyword `self` fn take_ref_mut_self(ref mut self: Pin<&mut Self>) {} //~ ERROR expected identifier, found keyword `self` fn self_subpat(self @ S {}: Self) {} //~ ERROR expected one of `)`, `,`, or `:`, found `@` } fn main() {}