// check-pass #![feature(negative_impls)] #![feature(with_negative_coherence)] // aux-build: foreign_trait.rs // Test that we cannot implement `LocalTrait` for `String`, // even though there is a `String: !ForeignTrait` impl. // // This may not be the behavior we want long term, but it's the // current semantics that we implemented so as to land `!Foo` impls // quickly. See internals thread: // // https://internals.rust-lang.org/t/foo/11587/ extern crate foreign_trait; use foreign_trait::ForeignTrait; trait LocalTrait {} impl LocalTrait for T {} impl LocalTrait for String {} fn main() {}