hir-lifetimes.rs

//@ pretty-compare-only
//@ pretty-mode:hir
//@ pp-exact:hir-lifetimes.pp

// This tests the pretty-printing of lifetimes in lots of ways.

#![allow(unused)]

struct Foo<'a> {
    x: &'a u32,
}

impl<'a> Foo<'a> {
    fn f<'b>(x: &'b u32) {}
}

impl Foo<'_> {
    fn a(x: &u32) {}

    fn b(x: &'_ u32) {}

    fn c(x: &'_ u32, y: &'static u32) {}

    // FIXME: `'a` before `self` is omitted
    fn d<'a>(&'a self, x: &'a u32) {}

    // FIXME: impl Traits printed as just `/*impl Trait*/`, ugh
    fn iter1<'a>(&self) -> impl Iterator<Item = u32> + 'a { 0..1 }

    fn iter2(&self) -> impl Iterator<Item = u32> + '_ { 0..1 }
}

fn a(x: Foo<'_>) {}

fn b<'a>(x: Foo<'a>) {}

struct Bar<'a, 'b, 'c, T> {
    x: &'a u32,
    y: &'b &'c u32,
    z: T,
}

fn f1<'a, 'b, T>(x: Bar<'a, 'b, '_, T>) {}

fn f2(x: Bar<'_, '_, '_, u32>) {}

trait MyTrait<'a, 'b> {
    fn f(&self, x: Foo<'a>, y: Foo<'b>);
}

impl<'a, 'b, 'c, T> MyTrait<'a, 'b> for Bar<'a, 'b, 'c, T> {
    fn f(&self, x: Foo<'a>, y: Foo<'b>) {}
}

fn g(x: &dyn for<'a, 'b> MyTrait<'a, 'b>) {}

trait Blah {}

type T<'a> = dyn Blah + 'a;

type Q<'a> = dyn MyTrait<'a, 'a> + 'a;

fn h<'b, F>(f: F, y: Foo<'b>) where F: for<'d> MyTrait<'d, 'b> {}

// FIXME(?): attr printing is weird
#[repr(C)]
struct S<'a>(&'a u32);

extern "C" {
    fn g1(s: S);
    fn g2(s: S<'_>);
    fn g3<'a>(s: S<'a>);
}

struct St<'a> { x: &'a u32 }

fn f() {
    _ = St { x: &0 };
    _ = St::<'_> { x: &0 };
}

struct Name<'a>(&'a str);

const A: Name = Name("a");
const B: &str = "";
static C: &'_ str = "";
static D: &'static str = "";

fn tr(_: Box<dyn Blah>) {}

fn main() {}