higher-ranked-trait-bounds.rs

#![crate_name = "foo"]

//@ has foo/trait.Trait.html
pub trait Trait<'x> {}

//@ has foo/fn.test1.html
//@ has - '//pre' "pub fn test1<T>()where for<'a> &'a T: Iterator,"
pub fn test1<T>()
where
    for<'a> &'a T: Iterator,
{
}

//@ has foo/fn.test2.html
//@ has - '//pre' "pub fn test2<T>()where for<'a, 'b> &'a T: Trait<'b>,"
pub fn test2<T>()
where
    for<'a, 'b> &'a T: Trait<'b>,
{
}

//@ has foo/fn.test3.html
//@ has - '//pre' "pub fn test3<F>()where F: for<'a, 'b> Fn(&'a u8, &'b u8),"
pub fn test3<F>()
where
    F: for<'a, 'b> Fn(&'a u8, &'b u8),
{
}

//@ has foo/struct.Foo.html
pub struct Foo<'a> {
    _x: &'a u8,
    pub some_trait: &'a dyn for<'b> Trait<'b>,
    pub some_func: for<'c> fn(val: &'c i32) -> i32,
}

//@ has - '//span[@id="structfield.some_func"]' "some_func: for<'c> fn(val: &'c i32) -> i32"
//@ has - '//span[@id="structfield.some_trait"]' "some_trait: &'a dyn for<'b> Trait<'b>"

impl<'a> Foo<'a> {
    //@ has - '//h4[@class="code-header"]' "pub fn bar<T>()where T: Trait<'a>,"
    pub fn bar<T>()
    where
        T: Trait<'a>,
    {
    }
}

//@ has foo/trait.B.html
pub trait B<'x> {}

//@ has - '//h3[@class="code-header"]' "impl<'a> B<'a> for dyn for<'b> Trait<'b>"
impl<'a> B<'a> for dyn for<'b> Trait<'b> {}

//@ has foo/struct.Bar.html
//@ has - '//span[@id="structfield.bar"]' "bar: &'a (dyn for<'b> Trait<'b> + Unpin)"
//@ has - '//span[@id="structfield.baz"]' "baz: &'a (dyn Unpin + for<'b> Trait<'b>)"
pub struct Bar<'a> {
    pub bar: &'a (dyn for<'b> Trait<'b> + Unpin),
    pub baz: &'a (dyn Unpin + for<'b> Trait<'b>),
}