From d19e4c4a8507da7e35d0de2b196c48e6621de1f9 Mon Sep 17 00:00:00 2001 From: Vadim Petrochenkov Date: Sat, 2 Dec 2017 22:15:03 +0300 Subject: syntax: Rewrite parsing of impls Properly parse impls for the never type `!` Recover from missing `for` in `impl Trait for Type` Prohibit inherent default impls and default impls of auto traits Change wording in more diagnostics to use "auto traits" Some minor code cleanups in the parser --- .../specialization/defaultimpl/validation.rs | 23 ++++++++++++++++++++++ 1 file changed, 23 insertions(+) create mode 100644 src/test/compile-fail/specialization/defaultimpl/validation.rs (limited to 'src/test/compile-fail/specialization/defaultimpl/validation.rs') diff --git a/src/test/compile-fail/specialization/defaultimpl/validation.rs b/src/test/compile-fail/specialization/defaultimpl/validation.rs new file mode 100644 index 00000000000..26b8b737f34 --- /dev/null +++ b/src/test/compile-fail/specialization/defaultimpl/validation.rs @@ -0,0 +1,23 @@ +// Copyright 2017 The Rust Project Developers. See the COPYRIGHT +// file at the top-level directory of this distribution and at +// http://rust-lang.org/COPYRIGHT. +// +// Licensed under the Apache License, Version 2.0 or the MIT license +// , at your +// option. This file may not be copied, modified, or distributed +// except according to those terms. + +#![feature(optin_builtin_traits)] +#![feature(specialization)] + +struct S; +struct Z; + +default impl S {} //~ ERROR inherent impls cannot be default + +default unsafe impl Send for S {} //~ ERROR impls of auto traits cannot be default +default impl !Send for Z {} //~ ERROR impls of auto traits cannot be default + +trait Tr {} +default impl !Tr for S {} //~ ERROR negative impls are only allowed for auto traits -- cgit 1.4.1-3-g733a5