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rustup

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This commit is contained in:
Ralf Jung 2021-07-20 12:18:59 +02:00
parent 250eff85c8
commit 6ce77164c1
2 changed files with 1 additions and 69 deletions
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rust-version
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tests/run-pass/dyn-lcsit.rs
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// Taken from the rustc test suite; this triggers an interesting case in unsizing.
#![allow(non_upper_case_globals, incomplete_features)]
#![feature(associated_type_bounds)]
#![feature(impl_trait_in_bindings)]
use std::ops::Add;
trait Tr1 { type As1; fn mk(&self) -> Self::As1; }
trait Tr2<'a> { fn tr2(self) -> &'a Self; }
fn assert_copy<T: Copy>(x: T) { let _x = x; let _x = x; }
fn assert_static<T: 'static>(_: T) {}
fn assert_forall_tr2<T: for<'a> Tr2<'a>>(_: T) {}
#[derive(Copy, Clone)]
struct S1;
#[derive(Copy, Clone)]
struct S2;
impl Tr1 for S1 { type As1 = S2; fn mk(&self) -> Self::As1 { S2 } }
const cdef_et1: &dyn Tr1<As1: Copy> = &S1;
const sdef_et1: &dyn Tr1<As1: Copy> = &S1;
pub fn use_et1() { assert_copy(cdef_et1.mk()); assert_copy(sdef_et1.mk()); }
const cdef_et2: &(dyn Tr1<As1: 'static> + Sync) = &S1;
static sdef_et2: &(dyn Tr1<As1: 'static> + Sync) = &S1;
pub fn use_et2() { assert_static(cdef_et2.mk()); assert_static(sdef_et2.mk()); }
const cdef_et3: &dyn Tr1<As1: Clone + Iterator<Item: Add<u8, Output: Into<u8>>>> = {
struct A;
impl Tr1 for A {
type As1 = core::ops::Range<u8>;
fn mk(&self) -> Self::As1 { 0..10 }
}
&A
};
pub fn use_et3() {
let _0 = cdef_et3.mk().clone();
let mut s = 0u8;
for _1 in _0 {
let _2 = _1 + 1u8;
s += _2.into();
}
assert_eq!(s, (0..10).map(|x| x + 1).sum());
}
const cdef_et4: &(dyn Tr1<As1: for<'a> Tr2<'a>> + Sync) = {
#[derive(Copy, Clone)]
struct A;
impl Tr1 for A {
type As1 = A;
fn mk(&self) -> A { A }
}
impl<'a> Tr2<'a> for A {
fn tr2(self) -> &'a Self { &A }
}
&A
};
static sdef_et4: &(dyn Tr1<As1: for<'a> Tr2<'a>> + Sync) = cdef_et4;
pub fn use_et4() { assert_forall_tr2(cdef_et4.mk()); assert_forall_tr2(sdef_et4.mk()); }
fn main() {
let _ = use_et1();
let _ = use_et2();
let _ = use_et3();
let _ = use_et4();
}