src/test/ui/trivial-bounds/trivial-bounds-inconsistent.rs

// Copyright 2018 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 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

// run-pass

// Check that tautalogically false bounds are accepted, and are used
// in type inference.
#![feature(trivial_bounds)]
#![allow(unused)]

pub trait Foo {
    fn test(&self);
}

fn generic_function<X: Foo>(x: X) {}

enum E where i32: Foo { V }

struct S where i32: Foo;

trait T where i32: Foo {}

union U where i32: Foo { f: i32 }

type Y where i32: Foo = ();

impl Foo for () where i32: Foo {
    fn test(&self) {
        3i32.test();
        Foo::test(&4i32);
        generic_function(5i32);
    }
}

fn f() where i32: Foo {
    let s = S;
    3i32.test();
    Foo::test(&4i32);
    generic_function(5i32);
}

fn g() where &'static str: Foo {
    "Foo".test();
    Foo::test(&"Foo");
    generic_function("Foo");
}

trait A {}

impl A for i32 {}

struct Dst<X: ?Sized> {
    x: X,
}

struct TwoStrs(str, str) where str: Sized;

fn unsized_local() where for<'a> Dst<A + 'a>: Sized {
    let x: Dst<A> = *(Box::new(Dst { x: 1 }) as Box<Dst<A>>);
}

fn return_str() -> str where str: Sized {
    *"Sized".to_string().into_boxed_str()
}

fn use_op(s: String) -> String where String: ::std::ops::Neg<Output=String> {
    -s
}

fn use_for() where i32: Iterator {
    for _ in 2i32 {}
}

fn main() {}