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// 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 <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.
// Unit test for the "user substitutions" that are annotated on each
// node.
// compile-flags:-Zverbose
#![feature(nll)]
#![feature(rustc_attrs)]
// Note: we reference the names T and U in the comments below.
trait Bazoom<T> {
fn method<U>(&self, arg: T, arg2: U) { }
}
impl<T, U> Bazoom<U> for T {
}
fn foo<'a, T>(_: T) { }
#[rustc_dump_user_substs]
fn main() {
// Here: nothing is given, so we don't have any annotation.
let x = foo;
x(22);
// Here: `u32` is given.
let x = foo::<u32>; //~ ERROR [u32]
x(22);
// Here: we only want the `T` to be given, the rest should be variables.
//
// (`T` refers to the declaration of `Bazoom`)
let x = <_ as Bazoom<u32>>::method::<_>; //~ ERROR [?0, u32, ?1]
x(&22, 44, 66);
// Here: all are given
let x = <u8 as Bazoom<u16>>::method::<u32>; //~ ERROR [u8, u16, u32]
x(&22, 44, 66);
// Here: we want in particular that *only* the method `U`
// annotation is given, the rest are variables.
//
// (`U` refers to the declaration of `Bazoom`)
let y = 22_u32;
y.method::<u32>(44, 66); //~ ERROR [?0, ?1, u32]
// Here: nothing is given, so we don't have any annotation.
let y = 22_u32;
y.method(44, 66);
}
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