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Use revisions for NLL in associated-types

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This commit is contained in:
Jack Huey 2022-05-21 14:14:28 -04:00
parent cc97875d26
commit eb222bf943
32 changed files with 280 additions and 130 deletions
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22
src/test/ui/associated-types/associated-types-eq-hr.stderr → src/test/ui/associated-types/associated-types-eq-hr.base.stderr
View file

@ -1,18 +1,18 @@
error[E0271]: type mismatch resolving `for<'x> <UintStruct as TheTrait<&'x isize>>::A == &'x isize`
--> $DIR/associated-types-eq-hr.rs:87:5
--> $DIR/associated-types-eq-hr.rs:91:5
|
LL | foo::<UintStruct>();
| ^^^^^^^^^^^^^^^^^ type mismatch resolving `for<'x> <UintStruct as TheTrait<&'x isize>>::A == &'x isize`
|
note: expected this to be `&isize`
--> $DIR/associated-types-eq-hr.rs:26:14
--> $DIR/associated-types-eq-hr.rs:30:14
|
LL | type A = &'a usize;
| ^^^^^^^^^
= note: expected reference `&isize`
found reference `&usize`
note: required by a bound in `foo`
--> $DIR/associated-types-eq-hr.rs:45:36
--> $DIR/associated-types-eq-hr.rs:49:36
|
LL | fn foo<T>()
| --- required by a bound in this
@ -21,20 +21,20 @@ LL | T: for<'x> TheTrait<&'x isize, A = &'x isize>,
| ^^^^^^^^^^^^^ required by this bound in `foo`
error[E0271]: type mismatch resolving `for<'x> <IntStruct as TheTrait<&'x isize>>::A == &'x usize`
--> $DIR/associated-types-eq-hr.rs:91:5
--> $DIR/associated-types-eq-hr.rs:95:5
|
LL | bar::<IntStruct>();
| ^^^^^^^^^^^^^^^^ type mismatch resolving `for<'x> <IntStruct as TheTrait<&'x isize>>::A == &'x usize`
|
note: expected this to be `&usize`
--> $DIR/associated-types-eq-hr.rs:14:14
--> $DIR/associated-types-eq-hr.rs:18:14
|
LL | type A = &'a isize;
| ^^^^^^^^^
= note: expected reference `&usize`
found reference `&isize`
note: required by a bound in `bar`
--> $DIR/associated-types-eq-hr.rs:52:36
--> $DIR/associated-types-eq-hr.rs:56:36
|
LL | fn bar<T>()
| --- required by a bound in this
@ -43,7 +43,7 @@ LL | T: for<'x> TheTrait<&'x isize, A = &'x usize>,
| ^^^^^^^^^^^^^ required by this bound in `bar`
error: implementation of `TheTrait` is not general enough
--> $DIR/associated-types-eq-hr.rs:96:5
--> $DIR/associated-types-eq-hr.rs:100:5
|
LL | tuple_one::<Tuple>();
| ^^^^^^^^^^^^^^^^^^ implementation of `TheTrait` is not general enough
@ -52,7 +52,7 @@ LL | tuple_one::<Tuple>();
= note: ...but it actually implements `TheTrait<(&'2 isize, &'2 isize)>`, for some specific lifetime `'2`
error: implementation of `TheTrait` is not general enough
--> $DIR/associated-types-eq-hr.rs:96:5
--> $DIR/associated-types-eq-hr.rs:100:5
|
LL | tuple_one::<Tuple>();
| ^^^^^^^^^^^^^^^^^^ implementation of `TheTrait` is not general enough
@ -61,7 +61,7 @@ LL | tuple_one::<Tuple>();
= note: ...but it actually implements `TheTrait<(&'2 isize, &'2 isize)>`, for some specific lifetime `'2`
error: implementation of `TheTrait` is not general enough
--> $DIR/associated-types-eq-hr.rs:102:5
--> $DIR/associated-types-eq-hr.rs:106:5
|
LL | tuple_two::<Tuple>();
| ^^^^^^^^^^^^^^^^^^ implementation of `TheTrait` is not general enough
@ -70,7 +70,7 @@ LL | tuple_two::<Tuple>();
= note: ...but it actually implements `TheTrait<(&'2 isize, &'2 isize)>`, for some specific lifetime `'2`
error: implementation of `TheTrait` is not general enough
--> $DIR/associated-types-eq-hr.rs:102:5
--> $DIR/associated-types-eq-hr.rs:106:5
|
LL | tuple_two::<Tuple>();
| ^^^^^^^^^^^^^^^^^^ implementation of `TheTrait` is not general enough
@ -79,7 +79,7 @@ LL | tuple_two::<Tuple>();
= note: ...but it actually implements `TheTrait<(&'2 isize, &'2 isize)>`, for some specific lifetime `'2`
error: implementation of `TheTrait` is not general enough
--> $DIR/associated-types-eq-hr.rs:112:5
--> $DIR/associated-types-eq-hr.rs:116:5
|
LL | tuple_four::<Tuple>();
| ^^^^^^^^^^^^^^^^^^^ implementation of `TheTrait` is not general enough

12
src/test/ui/associated-types/associated-types-eq-hr.nll.stderr
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@ -1,18 +1,18 @@
error[E0271]: type mismatch resolving `for<'x> <UintStruct as TheTrait<&'x isize>>::A == &'x isize`
--> $DIR/associated-types-eq-hr.rs:87:5
--> $DIR/associated-types-eq-hr.rs:91:5
|
LL | foo::<UintStruct>();
| ^^^^^^^^^^^^^^^^^ type mismatch resolving `for<'x> <UintStruct as TheTrait<&'x isize>>::A == &'x isize`
|
note: expected this to be `&isize`
--> $DIR/associated-types-eq-hr.rs:26:14
--> $DIR/associated-types-eq-hr.rs:30:14
|
LL | type A = &'a usize;
| ^^^^^^^^^
= note: expected reference `&isize`
found reference `&usize`
note: required by a bound in `foo`
--> $DIR/associated-types-eq-hr.rs:45:36
--> $DIR/associated-types-eq-hr.rs:49:36
|
LL | fn foo<T>()
| --- required by a bound in this
@ -21,20 +21,20 @@ LL | T: for<'x> TheTrait<&'x isize, A = &'x isize>,
| ^^^^^^^^^^^^^ required by this bound in `foo`
error[E0271]: type mismatch resolving `for<'x> <IntStruct as TheTrait<&'x isize>>::A == &'x usize`
--> $DIR/associated-types-eq-hr.rs:91:5
--> $DIR/associated-types-eq-hr.rs:95:5
|
LL | bar::<IntStruct>();
| ^^^^^^^^^^^^^^^^ type mismatch resolving `for<'x> <IntStruct as TheTrait<&'x isize>>::A == &'x usize`
|
note: expected this to be `&usize`
--> $DIR/associated-types-eq-hr.rs:14:14
--> $DIR/associated-types-eq-hr.rs:18:14
|
LL | type A = &'a isize;
| ^^^^^^^^^
= note: expected reference `&usize`
found reference `&isize`
note: required by a bound in `bar`
--> $DIR/associated-types-eq-hr.rs:52:36
--> $DIR/associated-types-eq-hr.rs:56:36
|
LL | fn bar<T>()
| --- required by a bound in this

14
src/test/ui/associated-types/associated-types-eq-hr.rs
View file

@ -1,3 +1,7 @@
// revisions: base nll
// ignore-compare-mode-nll
//[nll] compile-flags: -Z borrowck=mir
// Check testing of equality constraints in a higher-ranked context.
pub trait TheTrait<T> {
@ -94,14 +98,14 @@ pub fn call_bar() {
pub fn call_tuple_one() {
tuple_one::<Tuple>();
//~^ ERROR implementation of `TheTrait` is not general enough
//~| ERROR implementation of `TheTrait` is not general enough
//[base]~^ ERROR implementation of `TheTrait` is not general enough
//[base]~| ERROR implementation of `TheTrait` is not general enough
}
pub fn call_tuple_two() {
tuple_two::<Tuple>();
//~^ ERROR implementation of `TheTrait` is not general enough
//~| ERROR implementation of `TheTrait` is not general enough
//[base]~^ ERROR implementation of `TheTrait` is not general enough
//[base]~| ERROR implementation of `TheTrait` is not general enough
}
pub fn call_tuple_three() {
@ -110,7 +114,7 @@ pub fn call_tuple_three() {
pub fn call_tuple_four() {
tuple_four::<Tuple>();
//~^ ERROR implementation of `TheTrait` is not general enough
//[base]~^ ERROR implementation of `TheTrait` is not general enough
}
fn main() {}

2
src/test/ui/associated-types/associated-types-project-from-hrtb-in-fn-body.stderr → src/test/ui/associated-types/associated-types-project-from-hrtb-in-fn-body.base.stderr
View file

@ -1,5 +1,5 @@
error[E0623]: lifetime mismatch
--> $DIR/associated-types-project-from-hrtb-in-fn-body.rs:22:40
--> $DIR/associated-types-project-from-hrtb-in-fn-body.rs:26:40
|
LL | x: <I as Foo<&'a isize>>::A,
| --------- these two types are declared with different lifetimes...

4
src/test/ui/associated-types/associated-types-project-from-hrtb-in-fn-body.nll.stderr
View file

@ -1,5 +1,5 @@
error: lifetime may not live long enough
--> $DIR/associated-types-project-from-hrtb-in-fn-body.rs:22:29
--> $DIR/associated-types-project-from-hrtb-in-fn-body.rs:26:29
|
LL | fn bar<'a, 'b, I : for<'x> Foo<&'x isize>>(
| -- -- lifetime `'b` defined here
@ -12,7 +12,7 @@ LL | let z: I::A = if cond { x } else { y };
= help: consider adding the following bound: `'a: 'b`
error: lifetime may not live long enough
--> $DIR/associated-types-project-from-hrtb-in-fn-body.rs:22:40
--> $DIR/associated-types-project-from-hrtb-in-fn-body.rs:26:40
|
LL | fn bar<'a, 'b, I : for<'x> Foo<&'x isize>>(
| -- -- lifetime `'b` defined here

8
src/test/ui/associated-types/associated-types-project-from-hrtb-in-fn-body.rs
View file

@ -1,3 +1,7 @@
// ignore-compare-mode-nll
// revisions: base nll
// [nll]compile-flags: -Zborrowck=mir
// Check projection of an associated type out of a higher-ranked
// trait-bound in the context of a function body.
@ -20,7 +24,9 @@ fn bar<'a, 'b, I : for<'x> Foo<&'x isize>>(
{
// x and y here have two distinct lifetimes:
let z: I::A = if cond { x } else { y };
//~^ ERROR lifetime mismatch
//[base]~^ ERROR lifetime mismatch
//[nll]~^^ ERROR lifetime may not live long enough
//[nll]~| ERROR lifetime may not live long enough
}
pub fn main() {}

4
src/test/ui/associated-types/associated-types-subtyping-1.stderr → src/test/ui/associated-types/associated-types-subtyping-1.base.stderr
View file

@ -1,5 +1,5 @@
error[E0623]: lifetime mismatch
--> $DIR/associated-types-subtyping-1.rs:26:38
--> $DIR/associated-types-subtyping-1.rs:31:38
|
LL | fn method2<'a,'b,T>(x: &'a T, y: &'b T)
| ----- ----- these two types are declared with different lifetimes...
@ -8,7 +8,7 @@ LL | let _c: <T as Trait<'b>>::Type = a;
| ^ ...but data from `y` flows into `x` here
error[E0623]: lifetime mismatch
--> $DIR/associated-types-subtyping-1.rs:35:38
--> $DIR/associated-types-subtyping-1.rs:41:38
|
LL | fn method3<'a,'b,T>(x: &'a T, y: &'b T)
| ----- ----- these two types are declared with different lifetimes...

4
src/test/ui/associated-types/associated-types-subtyping-1.nll.stderr
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@ -1,5 +1,5 @@
error: lifetime may not live long enough
--> $DIR/associated-types-subtyping-1.rs:24:12
--> $DIR/associated-types-subtyping-1.rs:28:12
|
LL | fn method2<'a,'b,T>(x: &'a T, y: &'b T)
| -- -- lifetime `'b` defined here
@ -12,7 +12,7 @@ LL | let a: <T as Trait<'a>>::Type = make_any();
= help: consider adding the following bound: `'b: 'a`
error: lifetime may not live long enough
--> $DIR/associated-types-subtyping-1.rs:35:13
--> $DIR/associated-types-subtyping-1.rs:41:13
|
LL | fn method3<'a,'b,T>(x: &'a T, y: &'b T)
| -- -- lifetime `'b` defined here

12
src/test/ui/associated-types/associated-types-subtyping-1.rs
View file

@ -1,3 +1,7 @@
// ignore-compare-mode-nll
// revisions: base nll
// [nll]compile-flags: -Zborrowck=mir
#![allow(unused_variables)]
fn make_any<T>() -> T { loop {} }
@ -22,8 +26,10 @@ fn method2<'a,'b,T>(x: &'a T, y: &'b T)
{
// Note that &'static T <: &'a T.
let a: <T as Trait<'a>>::Type = make_any();
//[nll]~^ ERROR lifetime may not live long enough
let b: <T as Trait<'b>>::Type = make_any();
let _c: <T as Trait<'b>>::Type = a; //~ ERROR E0623
let _c: <T as Trait<'b>>::Type = a;
//[base]~^ ERROR E0623
}
fn method3<'a,'b,T>(x: &'a T, y: &'b T)
@ -32,7 +38,9 @@ fn method3<'a,'b,T>(x: &'a T, y: &'b T)
// Note that &'static T <: &'a T.
let a: <T as Trait<'a>>::Type = make_any();
let b: <T as Trait<'b>>::Type = make_any();
let _c: <T as Trait<'a>>::Type = b; //~ ERROR E0623
let _c: <T as Trait<'a>>::Type = b;
//[base]~^ ERROR E0623
//[nll]~^^ ERROR lifetime may not live long enough
}
fn method4<'a,'b,T>(x: &'a T, y: &'b T)

25
src/test/ui/associated-types/cache/project-fn-ret-contravariant-nll.krisskross.stderr vendored Normal file
View file

@ -0,0 +1,25 @@
error[E0623]: lifetime mismatch
--> $DIR/project-fn-ret-contravariant-nll.rs:51:5
|
LL | fn transmute<'a,'b>(x: &'a u32, y: &'b u32) -> (&'a u32, &'b u32) {
| ------- ------------------
| |
| this parameter and the return type are declared with different lifetimes...
...
LL | (a, b)
| ^ ...but data from `y` is returned here
error[E0623]: lifetime mismatch
--> $DIR/project-fn-ret-contravariant-nll.rs:51:8
|
LL | fn transmute<'a,'b>(x: &'a u32, y: &'b u32) -> (&'a u32, &'b u32) {
| ------- ------------------
| |
| this parameter and the return type are declared with different lifetimes...
...
LL | (a, b)
| ^ ...but data from `x` is returned here
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0623`.

55
src/test/ui/associated-types/cache/project-fn-ret-contravariant-nll.rs vendored Normal file
View file

@ -0,0 +1,55 @@
#![feature(unboxed_closures)]
// Test for projection cache. We should be able to project distinct
// lifetimes from `foo` as we reinstantiate it multiple times, but not
// if we do it just once. In this variant, the region `'a` is used in
// an contravariant position, which affects the results.
// revisions: ok oneuse transmute krisskross
//[ok] check-pass
//[oneuse] check-pass
// ignore-compare-mode-nll
// FIXME(nll): When stabilizing, this test should replace `project-fn-ret-contravariant.rs`
// The two would normally be just revisions, but this test uses revisions heavily, so splitting into
// a separate test is just easier.
#![allow(dead_code, unused_variables)]
fn foo<'a>() -> &'a u32 { loop { } }
fn bar<T>(t: T, x: T::Output) -> T::Output
where T: FnOnce<()>
{
t()
}
#[cfg(ok)] // two instantiations: OK
fn baz<'a,'b>(x: &'a u32, y: &'b u32) -> (&'a u32, &'b u32) {
let a = bar(foo, x);
let b = bar(foo, y);
(a, b)
}
#[cfg(oneuse)] // one instantiation: OK (surprisingly)
fn baz<'a,'b>(x: &'a u32, y: &'b u32) -> (&'a u32, &'b u32) {
let f /* : fn() -> &'static u32 */ = foo; // <-- inferred type annotated
let a = bar(f, x); // this is considered ok because fn args are contravariant...
let b = bar(f, y); // ...and hence we infer T to distinct values in each call.
(a, b)
}
#[cfg(transmute)] // one instantiations: BAD
fn baz<'a,'b>(x: &'a u32) -> &'static u32 {
bar(foo, x) //[transmute]~ ERROR E0759
}
#[cfg(krisskross)] // two instantiations, mixing and matching: BAD
fn transmute<'a,'b>(x: &'a u32, y: &'b u32) -> (&'a u32, &'b u32) {
let a = bar(foo, y);
let b = bar(foo, x);
(a, b) //[krisskross]~ ERROR lifetime mismatch [E0623]
//[krisskross]~^ ERROR lifetime mismatch [E0623]
}
fn main() { }

11
src/test/ui/associated-types/cache/project-fn-ret-contravariant-nll.transmute.stderr vendored Normal file
View file

@ -0,0 +1,11 @@
error[E0759]: `x` has lifetime `'a` but it needs to satisfy a `'static` lifetime requirement
--> $DIR/project-fn-ret-contravariant-nll.rs:44:8
|
LL | fn baz<'a,'b>(x: &'a u32) -> &'static u32 {
| ------- this data with lifetime `'a`...
LL | bar(foo, x)
| ^^^ - ...is used and required to live as long as `'static` here
error: aborting due to previous error
For more information about this error, try `rustc --explain E0759`.

30
src/test/ui/associated-types/cache/project-fn-ret-contravariant.krisskross.nll.stderr vendored
View file

@ -1,30 +0,0 @@
error: lifetime may not live long enough
--> $DIR/project-fn-ret-contravariant.rs:45:4
|
LL | fn transmute<'a,'b>(x: &'a u32, y: &'b u32) -> (&'a u32, &'b u32) {
| -- -- lifetime `'b` defined here
| |
| lifetime `'a` defined here
...
LL | (a, b)
| ^^^^^^ function was supposed to return data with lifetime `'b` but it is returning data with lifetime `'a`
|
= help: consider adding the following bound: `'a: 'b`
error: lifetime may not live long enough
--> $DIR/project-fn-ret-contravariant.rs:45:4
|
LL | fn transmute<'a,'b>(x: &'a u32, y: &'b u32) -> (&'a u32, &'b u32) {
| -- -- lifetime `'b` defined here
| |
| lifetime `'a` defined here
...
LL | (a, b)
| ^^^^^^ function was supposed to return data with lifetime `'a` but it is returning data with lifetime `'b`
|
= help: consider adding the following bound: `'b: 'a`
help: `'a` and `'b` must be the same: replace one with the other
error: aborting due to 2 previous errors

4
src/test/ui/associated-types/cache/project-fn-ret-contravariant.krisskross.stderr vendored
View file

@ -1,5 +1,5 @@
error[E0623]: lifetime mismatch
--> $DIR/project-fn-ret-contravariant.rs:45:5
--> $DIR/project-fn-ret-contravariant.rs:52:5
|
LL | fn transmute<'a,'b>(x: &'a u32, y: &'b u32) -> (&'a u32, &'b u32) {
| ------- ------------------
@ -10,7 +10,7 @@ LL | (a, b)
| ^ ...but data from `y` is returned here
error[E0623]: lifetime mismatch
--> $DIR/project-fn-ret-contravariant.rs:45:8
--> $DIR/project-fn-ret-contravariant.rs:52:8
|
LL | fn transmute<'a,'b>(x: &'a u32, y: &'b u32) -> (&'a u32, &'b u32) {
| ------- ------------------

8
src/test/ui/associated-types/cache/project-fn-ret-contravariant.ok.stderr vendored
View file

@ -1,8 +0,0 @@
error: fatal error triggered by #[rustc_error]
--> $DIR/project-fn-ret-contravariant.rs:50:1
|
LL | fn main() { }
| ^^^^^^^^^
error: aborting due to previous error

8
src/test/ui/associated-types/cache/project-fn-ret-contravariant.oneuse.stderr vendored
View file

@ -1,8 +0,0 @@
error: fatal error triggered by #[rustc_error]
--> $DIR/project-fn-ret-contravariant.rs:50:1
|
LL | fn main() { }
| ^^^^^^^^^
error: aborting due to previous error

12
src/test/ui/associated-types/cache/project-fn-ret-contravariant.rs vendored
View file

@ -1,5 +1,4 @@
#![feature(unboxed_closures)]
#![feature(rustc_attrs)]
// Test for projection cache. We should be able to project distinct
// lifetimes from `foo` as we reinstantiate it multiple times, but not
@ -7,6 +6,14 @@
// an contravariant position, which affects the results.
// revisions: ok oneuse transmute krisskross
//[ok] check-pass
//[oneuse] check-pass
// ignore-compare-mode-nll
// FIXME(nll): When stabilizing, this test should be replaced with
// `project-fn-ret-contravariant-nll.rs` The two would normally be just
// revisions, but this test uses revisions heavily, so splitting into
// a separate test is just easier.
#![allow(dead_code, unused_variables)]
@ -46,5 +53,4 @@ fn transmute<'a,'b>(x: &'a u32, y: &'b u32) -> (&'a u32, &'b u32) {
//[krisskross]~^ ERROR lifetime mismatch [E0623]
}
#[rustc_error]
fn main() { } //[ok,oneuse]~ ERROR fatal error triggered by #[rustc_error]
fn main() { }

10
src/test/ui/associated-types/cache/project-fn-ret-contravariant.transmute.nll.stderr vendored
View file

@ -1,10 +0,0 @@
error: lifetime may not live long enough
--> $DIR/project-fn-ret-contravariant.rs:38:4
|
LL | fn baz<'a,'b>(x: &'a u32) -> &'static u32 {
| -- lifetime `'a` defined here
LL | bar(foo, x)
| ^^^^^^^^^^^ returning this value requires that `'a` must outlive `'static`
error: aborting due to previous error

2
src/test/ui/associated-types/cache/project-fn-ret-contravariant.transmute.stderr vendored
View file

@ -1,5 +1,5 @@
error[E0759]: `x` has lifetime `'a` but it needs to satisfy a `'static` lifetime requirement
--> $DIR/project-fn-ret-contravariant.rs:38:8
--> $DIR/project-fn-ret-contravariant.rs:45:8
|
LL | fn baz<'a,'b>(x: &'a u32) -> &'static u32 {
| ------- this data with lifetime `'a`...

4
src/test/ui/associated-types/cache/project-fn-ret-invariant.krisskross.nll.stderr → src/test/ui/associated-types/cache/project-fn-ret-invariant-nll.krisskross.stderr vendored
View file

@ -1,5 +1,5 @@
error: lifetime may not live long enough
--> $DIR/project-fn-ret-invariant.rs:56:5
--> $DIR/project-fn-ret-invariant-nll.rs:63:5
|
LL | fn transmute<'a, 'b>(x: Type<'a>, y: Type<'b>) -> (Type<'a>, Type<'b>) {
| -- -- lifetime `'b` defined here
@ -15,7 +15,7 @@ LL | (a, b)
= help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance
error: lifetime may not live long enough
--> $DIR/project-fn-ret-invariant.rs:56:5
--> $DIR/project-fn-ret-invariant-nll.rs:63:5
|
LL | fn transmute<'a, 'b>(x: Type<'a>, y: Type<'b>) -> (Type<'a>, Type<'b>) {
| -- -- lifetime `'b` defined here

4
src/test/ui/associated-types/cache/project-fn-ret-invariant.oneuse.nll.stderr → src/test/ui/associated-types/cache/project-fn-ret-invariant-nll.oneuse.stderr vendored
View file

@ -1,5 +1,5 @@
error: lifetime may not live long enough
--> $DIR/project-fn-ret-invariant.rs:39:13
--> $DIR/project-fn-ret-invariant-nll.rs:46:13
|
LL | fn baz<'a, 'b>(x: Type<'a>, y: Type<'b>) -> (Type<'a>, Type<'b>) {
| -- -- lifetime `'b` defined here
@ -15,7 +15,7 @@ LL | let a = bar(f, x);
= help: see <https://doc.rust-lang.org/nomicon/subtyping.html> for more information about variance
error: lifetime may not live long enough
--> $DIR/project-fn-ret-invariant.rs:40:13
--> $DIR/project-fn-ret-invariant-nll.rs:47:13
|
LL | fn baz<'a, 'b>(x: Type<'a>, y: Type<'b>) -> (Type<'a>, Type<'b>) {
| -- -- lifetime `'b` defined here

68
src/test/ui/associated-types/cache/project-fn-ret-invariant-nll.rs vendored Normal file
View file

@ -0,0 +1,68 @@
#![feature(unboxed_closures)]
// Test for projection cache. We should be able to project distinct
// lifetimes from `foo` as we reinstantiate it multiple times, but not
// if we do it just once. In this variant, the region `'a` is used in
// an invariant position, which affects the results.
// revisions: ok oneuse transmute krisskross
//[ok] check-pass
// compile-flags: -Z borrowck=mir
// ignore-compare-mode-nll
// FIXME(nll): When stabilizing, this test should replace with `project-fn-ret-invariant.rs`
// The two would normally be just revisions, but this test uses revisions heavily, so splitting into
// a separate test is just easier.
#![allow(dead_code, unused_variables)]
use std::marker::PhantomData;
struct Type<'a> {
// Invariant
data: PhantomData<fn(&'a u32) -> &'a u32>,
}
fn foo<'a>() -> Type<'a> {
loop {}
}
fn bar<T>(t: T, x: T::Output) -> T::Output
where
T: FnOnce<()>,
{
t()
}
#[cfg(ok)] // two instantiations: OK
fn baz<'a, 'b>(x: Type<'a>, y: Type<'b>) -> (Type<'a>, Type<'b>) {
let a = bar(foo, x);
let b = bar(foo, y);
(a, b)
}
#[cfg(oneuse)] // one instantiation: BAD
fn baz<'a, 'b>(x: Type<'a>, y: Type<'b>) -> (Type<'a>, Type<'b>) {
let f = foo; // <-- No consistent type can be inferred for `f` here.
let a = bar(f, x); //[oneuse]~ ERROR lifetime may not live long enough
let b = bar(f, y); //[oneuse]~ ERROR lifetime may not live long enough
(a, b)
}
#[cfg(transmute)] // one instantiations: BAD
fn baz<'a, 'b>(x: Type<'a>) -> Type<'static> {
// Cannot instantiate `foo` with any lifetime other than `'a`,
// since it is provided as input.
bar(foo, x) //[transmute]~ ERROR lifetime may not live long enough
}
#[cfg(krisskross)] // two instantiations, mixing and matching: BAD
fn transmute<'a, 'b>(x: Type<'a>, y: Type<'b>) -> (Type<'a>, Type<'b>) {
let a = bar(foo, y);
let b = bar(foo, x);
(a, b)
//[krisskross]~^ ERROR lifetime may not live long enough
//[krisskross]~| ERROR lifetime may not live long enough
}
fn main() {}

2
src/test/ui/associated-types/cache/project-fn-ret-invariant.transmute.nll.stderr → src/test/ui/associated-types/cache/project-fn-ret-invariant-nll.transmute.stderr vendored
View file

@ -1,5 +1,5 @@
error: lifetime may not live long enough
--> $DIR/project-fn-ret-invariant.rs:49:5
--> $DIR/project-fn-ret-invariant-nll.rs:56:5
|
LL | fn baz<'a, 'b>(x: Type<'a>) -> Type<'static> {
| -- lifetime `'a` defined here

4
src/test/ui/associated-types/cache/project-fn-ret-invariant.krisskross.stderr vendored
View file

@ -1,5 +1,5 @@
error[E0623]: lifetime mismatch
--> $DIR/project-fn-ret-invariant.rs:54:22
--> $DIR/project-fn-ret-invariant.rs:60:22
|
LL | fn transmute<'a, 'b>(x: Type<'a>, y: Type<'b>) -> (Type<'a>, Type<'b>) {
| -------- --------------------
@ -9,7 +9,7 @@ LL | let a = bar(foo, y);
| ^ ...but data from `x` is returned here
error[E0623]: lifetime mismatch
--> $DIR/project-fn-ret-invariant.rs:56:9
--> $DIR/project-fn-ret-invariant.rs:62:9
|
LL | fn transmute<'a, 'b>(x: Type<'a>, y: Type<'b>) -> (Type<'a>, Type<'b>) {
| -------- --------------------

8
src/test/ui/associated-types/cache/project-fn-ret-invariant.ok.stderr vendored
View file

@ -1,8 +0,0 @@
error: fatal error triggered by #[rustc_error]
--> $DIR/project-fn-ret-invariant.rs:60:1
|
LL | fn main() {}
| ^^^^^^^^^
error: aborting due to previous error

2
src/test/ui/associated-types/cache/project-fn-ret-invariant.oneuse.stderr vendored
View file

@ -1,5 +1,5 @@
error[E0623]: lifetime mismatch
--> $DIR/project-fn-ret-invariant.rs:40:20
--> $DIR/project-fn-ret-invariant.rs:46:20
|
LL | fn baz<'a, 'b>(x: Type<'a>, y: Type<'b>) -> (Type<'a>, Type<'b>) {
| -------- --------------------

10
src/test/ui/associated-types/cache/project-fn-ret-invariant.rs vendored
View file

@ -1,11 +1,17 @@
#![feature(unboxed_closures)]
#![feature(rustc_attrs)]
// Test for projection cache. We should be able to project distinct
// lifetimes from `foo` as we reinstantiate it multiple times, but not
// if we do it just once. In this variant, the region `'a` is used in
// an invariant position, which affects the results.
// revisions: ok oneuse transmute krisskross
//[ok] check-pass
// ignore-compare-mode-nll
// FIXME(nll): When stabilizing, this test should be replaced with `project-fn-ret-invariant-nll.rs`
// The two would normally be just revisions, but this test uses revisions heavily, so splitting into
// a separate test is just easier.
#![allow(dead_code, unused_variables)]
use std::marker::PhantomData;
@ -56,6 +62,4 @@ fn transmute<'a, 'b>(x: Type<'a>, y: Type<'b>) -> (Type<'a>, Type<'b>) {
(a, b) //[krisskross]~ ERROR E0623
}
#[rustc_error]
fn main() {}
//[ok]~^ ERROR fatal error triggered by #[rustc_error]

4
src/test/ui/associated-types/cache/project-fn-ret-invariant.transmute.stderr vendored
View file

@ -1,5 +1,5 @@
error[E0759]: `x` has lifetime `'a` but it needs to satisfy a `'static` lifetime requirement
--> $DIR/project-fn-ret-invariant.rs:49:9
--> $DIR/project-fn-ret-invariant.rs:55:9
|
LL | fn baz<'a, 'b>(x: Type<'a>) -> Type<'static> {
| -------- this data with lifetime `'a`...
@ -8,7 +8,7 @@ LL | bar(foo, x)
| ^^^ - ...is used and required to live as long as `'static` here
|
note: `'static` lifetime requirement introduced by the return type
--> $DIR/project-fn-ret-invariant.rs:45:37
--> $DIR/project-fn-ret-invariant.rs:51:37
|
LL | fn baz<'a, 'b>(x: Type<'a>) -> Type<'static> {
| ^^^^^^^ `'static` requirement introduced here

17
src/test/ui/associated-types/higher-ranked-projection.badbase.stderr Normal file
View file

@ -0,0 +1,17 @@
error[E0308]: mismatched types
--> $DIR/higher-ranked-projection.rs:25:5
|
LL | foo(());
| ^^^ lifetime mismatch
|
= note: expected reference `&'a ()`
found reference `&()`
note: the lifetime requirement is introduced here
--> $DIR/higher-ranked-projection.rs:16:33
|
LL | where for<'a> &'a T: Mirror<Image=U>
| ^^^^^^^
error: aborting due to previous error
For more information about this error, try `rustc --explain E0308`.

17
src/test/ui/associated-types/higher-ranked-projection.badnll.stderr Normal file
View file

@ -0,0 +1,17 @@
error[E0308]: mismatched types
--> $DIR/higher-ranked-projection.rs:25:5
|
LL | foo(());
| ^^^^^^^ one type is more general than the other
|
= note: expected reference `&'a ()`
found reference `&()`
note: the lifetime requirement is introduced here
--> $DIR/higher-ranked-projection.rs:16:33
|
LL | where for<'a> &'a T: Mirror<Image=U>
| ^^^^^^^
error: aborting due to previous error
For more information about this error, try `rustc --explain E0308`.

8
src/test/ui/associated-types/higher-ranked-projection.good.stderr
View file

@ -1,8 +0,0 @@
error: fatal error triggered by #[rustc_error]
--> $DIR/higher-ranked-projection.rs:24:1
|
LL | fn main() {
| ^^^^^^^^^
error: aborting due to previous error

15
src/test/ui/associated-types/higher-ranked-projection.rs
View file

@ -1,6 +1,7 @@
#![feature(rustc_attrs)]
// revisions: good bad
// ignore-compare-mode-nll
// revisions: good badbase badnll
//[good] check-pass
// [badnll]compile-flags: -Zborrowck=mir
trait Mirror {
type Image;
@ -10,7 +11,7 @@ impl<T> Mirror for T {
type Image = T;
}
#[cfg(bad)]
#[cfg(any(badbase, badnll))]
fn foo<U, T>(_t: T)
where for<'a> &'a T: Mirror<Image=U>
{}
@ -20,8 +21,8 @@ fn foo<U, T>(_t: T)
where for<'a> &'a T: Mirror<Image=&'a U>
{}
#[rustc_error]
fn main() { //[good]~ ERROR fatal error triggered by #[rustc_error]
fn main() {
foo(());
//[bad]~^ ERROR mismatched types
//[badbase]~^ ERROR mismatched types
//[badnll]~^^ ERROR mismatched types
}