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// Unit test for the "user substitutions" that are annotated on each
// node.
// compile-flags:-Zverbose
#![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<S, T> Bazoom<T> for S {
}
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, which doesn't contain any lifetimes, so we don't
// have any annotation.
let x = foo::<u32>;
x(22);
let x = foo::<&'static u32>; //~ ERROR [&ReStatic 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 and definitely contain no lifetimes, so we
// don't have any annotation.
let x = <u8 as Bazoom<u16>>::method::<u32>;
x(&22, 44, 66);
// Here: all are given and we have a lifetime.
let x = <u8 as Bazoom<&'static u16>>::method::<u32>; //~ ERROR [u8, &ReStatic 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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