Bare trait object edge with leading paren #35
Description
The following test case (taken from rustc's testsuite) doesn't parse:
// build-pass (FIXME(62277): could be check-pass?)
#![allow(bare_trait_objects)]
type A = Box<(Fn(u8) -> u8) + 'static + Send + Sync>; // OK (but see #39318)
fn main() {}
Besides being already controversial (check out the issue referenced) and one hell of an edge case, bare trait objects are on their way out.