611a06a375
Previously, we would retrieve the span from the `Body` using the `locations` field. However, we may end up changing the `locations` field when moving a constraint from a promoted to a different body. We now store the original `Span` in a dedication field, so that changes to the `locations` do not affect the quality of our diagnostics.
105 lines
3.2 KiB
Rust
105 lines
3.2 KiB
Rust
// revisions: base nll
|
|
// ignore-compare-mode-nll
|
|
//[nll] compile-flags: -Z borrowck=mir
|
|
|
|
#![allow(dead_code)]
|
|
|
|
fn non_elidable<'a, 'b>(a: &'a u8, b: &'b u8) -> &'a u8 {
|
|
a
|
|
}
|
|
|
|
// The incorrect case without `for<'a>` is tested for in `rfc1623-2.rs`
|
|
static NON_ELIDABLE_FN: &for<'a> fn(&'a u8, &'a u8) -> &'a u8 =
|
|
&(non_elidable as for<'a> fn(&'a u8, &'a u8) -> &'a u8);
|
|
|
|
struct SomeStruct<'x, 'y, 'z: 'x> {
|
|
foo: &'x Foo<'z>,
|
|
bar: &'x Bar<'z>,
|
|
f: &'y dyn for<'a, 'b> Fn(&'a Foo<'b>) -> &'a Foo<'b>,
|
|
}
|
|
|
|
// Without this, the wf-check will fail early so we'll never see the
|
|
// error in SOME_STRUCT's body.
|
|
unsafe impl<'x, 'y, 'z: 'x> Sync for SomeStruct<'x, 'y, 'z> {}
|
|
|
|
fn id<T>(t: T) -> T {
|
|
t
|
|
}
|
|
|
|
static SOME_STRUCT: &SomeStruct = &SomeStruct {
|
|
foo: &Foo { bools: &[false, true] },
|
|
bar: &Bar { bools: &[true, true] },
|
|
f: &id,
|
|
//[base]~^ ERROR implementation of `FnOnce` is not general enough
|
|
//[nll]~^^ ERROR mismatched types
|
|
//[nll]~| ERROR mismatched types
|
|
//[nll]~| ERROR implementation of `FnOnce` is not general enough
|
|
//[nll]~| ERROR implementation of `FnOnce` is not general enough
|
|
};
|
|
|
|
// very simple test for a 'static static with default lifetime
|
|
static STATIC_STR: &'static str = "&'static str";
|
|
const CONST_STR: &'static str = "&'static str";
|
|
|
|
// this should be the same as without default:
|
|
static EXPLICIT_STATIC_STR: &'static str = "&'static str";
|
|
const EXPLICIT_CONST_STR: &'static str = "&'static str";
|
|
|
|
// a function that elides to an unbound lifetime for both in- and output
|
|
fn id_u8_slice(arg: &[u8]) -> &[u8] {
|
|
arg
|
|
}
|
|
|
|
// one with a function, argument elided
|
|
static STATIC_SIMPLE_FN: &'static fn(&[u8]) -> &[u8] = &(id_u8_slice as fn(&[u8]) -> &[u8]);
|
|
const CONST_SIMPLE_FN: &'static fn(&[u8]) -> &[u8] = &(id_u8_slice as fn(&[u8]) -> &[u8]);
|
|
|
|
// this should be the same as without elision
|
|
static STATIC_NON_ELIDED_fN: &'static for<'a> fn(&'a [u8]) -> &'a [u8] =
|
|
&(id_u8_slice as for<'a> fn(&'a [u8]) -> &'a [u8]);
|
|
const CONST_NON_ELIDED_fN: &'static for<'a> fn(&'a [u8]) -> &'a [u8] =
|
|
&(id_u8_slice as for<'a> fn(&'a [u8]) -> &'a [u8]);
|
|
|
|
// another function that elides, each to a different unbound lifetime
|
|
fn multi_args(a: &u8, b: &u8, c: &u8) {}
|
|
|
|
static STATIC_MULTI_FN: &'static fn(&u8, &u8, &u8) = &(multi_args as fn(&u8, &u8, &u8));
|
|
const CONST_MULTI_FN: &'static fn(&u8, &u8, &u8) = &(multi_args as fn(&u8, &u8, &u8));
|
|
|
|
struct Foo<'a> {
|
|
bools: &'a [bool],
|
|
}
|
|
|
|
static STATIC_FOO: Foo<'static> = Foo { bools: &[true, false] };
|
|
const CONST_FOO: Foo<'static> = Foo { bools: &[true, false] };
|
|
|
|
type Bar<'a> = Foo<'a>;
|
|
|
|
static STATIC_BAR: Bar<'static> = Bar { bools: &[true, false] };
|
|
const CONST_BAR: Bar<'static> = Bar { bools: &[true, false] };
|
|
|
|
type Baz<'a> = fn(&'a [u8]) -> Option<u8>;
|
|
|
|
fn baz(e: &[u8]) -> Option<u8> {
|
|
e.first().map(|x| *x)
|
|
}
|
|
|
|
static STATIC_BAZ: &'static Baz<'static> = &(baz as Baz);
|
|
const CONST_BAZ: &'static Baz<'static> = &(baz as Baz);
|
|
|
|
static BYTES: &'static [u8] = &[1, 2, 3];
|
|
|
|
fn main() {
|
|
let x = &[1u8, 2, 3];
|
|
let y = x;
|
|
|
|
// this works, so lifetime < `'static` is valid
|
|
assert_eq!(Some(1), STATIC_BAZ(y));
|
|
assert_eq!(Some(1), CONST_BAZ(y));
|
|
|
|
let y = &[1u8, 2, 3];
|
|
|
|
STATIC_BAZ(BYTES); // BYTES has static lifetime
|
|
CONST_BAZ(y); // interestingly this does not get reported
|
|
}
|