Unnamed repository; edit this file 'description' to name the repository.
Diffstat (limited to 'crates/hir-ty/src/tests/coercion.rs')
| -rw-r--r-- | crates/hir-ty/src/tests/coercion.rs | 80 |
1 files changed, 43 insertions, 37 deletions
diff --git a/crates/hir-ty/src/tests/coercion.rs b/crates/hir-ty/src/tests/coercion.rs index 3894b4b6f7..5a53db4b7a 100644 --- a/crates/hir-ty/src/tests/coercion.rs +++ b/crates/hir-ty/src/tests/coercion.rs @@ -96,7 +96,7 @@ fn foo<T>(x: &[T]) -> &[T] { x } fn test() { let x = if true { foo(&[1]) - // ^^^^ adjustments: Deref(None), Borrow(Ref('?8, Not)), Pointer(Unsize) + // ^^^^ adjustments: Deref(None), Borrow(Ref('?1, Not)), Pointer(Unsize) } else { &[1] }; @@ -148,7 +148,7 @@ fn foo<T>(x: &[T]) -> &[T] { x } fn test(i: i32) { let x = match i { 2 => foo(&[2]), - // ^^^^ adjustments: Deref(None), Borrow(Ref('?8, Not)), Pointer(Unsize) + // ^^^^ adjustments: Deref(None), Borrow(Ref('?1, Not)), Pointer(Unsize) 1 => &[1], _ => &[3], }; @@ -177,21 +177,23 @@ fn test(i: i32) { #[test] fn coerce_merge_one_by_one1() { - cov_mark::check!(coerce_merge_fail_fallback); - check( r" fn test() { let t = &mut 1; let x = match 1 { 1 => t as *mut i32, - //^^^^^^^^^^^^^ adjustments: Pointer(MutToConstPointer) + //^ adjustments: Deref(None), Borrow(RawPtr(Mut)) + _ => t as *const i32, + }; + x; + // ^ type: *const i32 + let x = match 1 { + 1 => t as *mut i32, 2 => t as &i32, //^^^^^^^^^ expected *mut i32, got &'? i32 _ => t as *const i32, }; - x; - //^ type: *const i32 } ", @@ -266,7 +268,7 @@ fn takes_ref_str(x: &str) {} fn returns_string() -> String { loop {} } fn test() { takes_ref_str(&{ returns_string() }); - // ^^^^^^^^^^^^^^^^^^^^^ adjustments: Deref(None), Deref(Some(OverloadedDeref(Some(Not)))), Borrow(Ref('{error}, Not)) + // ^^^^^^^^^^^^^^^^^^^^^ adjustments: Deref(None), Deref(Some(OverloadedDeref(Some(Not)))), Borrow(Ref('{region error}, Not)) } "#, ); @@ -276,17 +278,19 @@ fn test() { fn coerce_autoderef_implication_1() { check_no_mismatches( r" -//- minicore: deref -struct Foo<T>; +//- minicore: deref, phantom_data +use core::marker::PhantomData; + +struct Foo<T>(PhantomData<T>); impl core::ops::Deref for Foo<u32> { type Target = (); } fn takes_ref_foo<T>(x: &Foo<T>) {} fn test() { - let foo = Foo; + let foo = Foo(PhantomData); //^^^ type: Foo<{unknown}> takes_ref_foo(&foo); - let foo = Foo; + let foo = Foo(PhantomData); //^^^ type: Foo<u32> let _: &() = &foo; }", @@ -297,16 +301,18 @@ fn test() { fn coerce_autoderef_implication_2() { check( r" -//- minicore: deref -struct Foo<T>; +//- minicore: deref, phantom_data +use core::marker::PhantomData; + +struct Foo<T>(PhantomData<T>); impl core::ops::Deref for Foo<u32> { type Target = (); } fn takes_ref_foo<T>(x: &Foo<T>) {} fn test() { - let foo = Foo; + let foo = Foo(PhantomData); //^^^ type: Foo<{unknown}> - let _: &u32 = &Foo; - //^^^^ expected &'? u32, got &'? Foo<{unknown}> + let _: &u32 = &Foo(PhantomData); + //^^^^^^^^^^^^^^^^^ expected &'? u32, got &'? Foo<{unknown}> }", ); } @@ -409,8 +415,6 @@ fn test() { #[test] fn coerce_fn_items_in_match_arms() { - cov_mark::check!(coerce_fn_reification); - check_no_mismatches( r" fn foo1(x: u32) -> isize { 1 } @@ -484,6 +488,8 @@ fn test() { ); } +// FIXME(next-solver): We could learn more from the `&S` -> `&dyn Foo<i8, _>` coercion if we followed the rustc model +// where unsized is successful if all unsizing trait goals are certain (and non-unsizing goals are delayed). #[test] fn coerce_unsize_trait_object_simple() { check_types( @@ -503,8 +509,8 @@ fn test() { //^ S<i8, i16> let obj: &dyn Bar<_, i8, i16> = &S; //^ S<i8, i16> - let obj: &dyn Foo<i8, _> = &S; - //^ S<i8, {unknown}> + //let obj: &dyn Foo<i8, _> = &S; + // S<{unknown}, {unknown}> }"#, ); } @@ -543,9 +549,9 @@ struct Bar<T>(Foo<T>); fn test() { let _: &Foo<[usize]> = &Foo { t: [1, 2, 3] }; - //^^^^^^^^^^^^^^^^^^^^^ expected &'? Foo<[usize]>, got &'? Foo<[i32; 3]> + //^^^^^^^^^^^^^^^^^^^^^ type: &'? Foo<[usize; 3]> let _: &Bar<[usize]> = &Bar(Foo { t: [1, 2, 3] }); - //^^^^^^^^^^^^^^^^^^^^^^^^^^ expected &'? Bar<[usize]>, got &'? Bar<[i32; 3]> + //^^^^^^^^^^^^^^^^^^^^^^^^^^ type: &'? Bar<[usize; 3]> } "#, ); @@ -561,7 +567,7 @@ trait Foo {} fn test(f: impl Foo, g: &(impl Foo + ?Sized)) { let _: &dyn Foo = &f; let _: &dyn Foo = g; - //^ expected &'? (dyn Foo + '?), got &'? impl Foo + ?Sized + //^ expected &'? (dyn Foo + 'static), got &'? impl Foo + ?Sized } "#, ); @@ -681,9 +687,9 @@ fn coerce_unsize_expected_type_2() { check_no_mismatches( r#" //- minicore: coerce_unsized -struct InFile<T>; +struct InFile<T>(T); impl<T> InFile<T> { - fn with_value<U>(self, value: U) -> InFile<U> { InFile } + fn with_value<U>(self, value: U) -> InFile<U> { InFile(loop {}) } } struct RecordField; trait AstNode {} @@ -692,7 +698,7 @@ impl AstNode for RecordField {} fn takes_dyn(it: InFile<&dyn AstNode>) {} fn test() { - let x: InFile<()> = InFile; + let x: InFile<()> = InFile(()); let n = &RecordField; takes_dyn(x.with_value(n)); } @@ -827,11 +833,11 @@ struct V<T> { t: T } fn main() { let a: V<&dyn Tr>; (a,) = V { t: &S }; - //^^^^expected V<&'? S>, got (V<&'? (dyn Tr + '?)>,) + //^^^^expected V<&'? S>, got (V<&'? (dyn Tr + 'static)>,) let mut a: V<&dyn Tr> = V { t: &S }; (a,) = V { t: &S }; - //^^^^expected V<&'? S>, got (V<&'? (dyn Tr + '?)>,) + //^^^^expected V<&'? S>, got (V<&'? (dyn Tr + 'static)>,) } "#, ); @@ -848,8 +854,8 @@ impl core::cmp::PartialEq for Struct { } fn test() { Struct == Struct; - // ^^^^^^ adjustments: Borrow(Ref('{error}, Not)) - // ^^^^^^ adjustments: Borrow(Ref('{error}, Not)) + // ^^^^^^ adjustments: Borrow(Ref('{region error}, Not)) + // ^^^^^^ adjustments: Borrow(Ref('{region error}, Not)) }", ); } @@ -865,7 +871,7 @@ impl core::ops::AddAssign for Struct { } fn test() { Struct += Struct; - // ^^^^^^ adjustments: Borrow(Ref('{error}, Mut)) + // ^^^^^^ adjustments: Borrow(Ref('{region error}, Mut)) // ^^^^^^ adjustments: }", ); @@ -879,7 +885,7 @@ fn adjust_index() { fn test() { let x = [1, 2, 3]; x[2] = 6; - // ^ adjustments: Borrow(Ref('?8, Mut)) + // ^ adjustments: Borrow(Ref('?0, Mut)) } ", ); @@ -899,16 +905,16 @@ impl core::ops::Index<usize> for StructMut { fn index(&self, index: usize) -> &Self::Output { &() } } -impl core::ops::IndexMut for StructMut { +impl core::ops::IndexMut<usize> for StructMut { fn index_mut(&mut self, index: usize) -> &mut Self::Output { &mut () } } fn test() { Struct[0]; - // ^^^^^^ adjustments: Borrow(Ref('?2, Not)) + // ^^^^^^ adjustments: Borrow(Ref('?0, Not)) StructMut[0]; - // ^^^^^^^^^ adjustments: Borrow(Ref('?5, Not)) + // ^^^^^^^^^ adjustments: Borrow(Ref('?1, Not)) &mut StructMut[0]; - // ^^^^^^^^^ adjustments: Borrow(Ref('?8, Mut)) + // ^^^^^^^^^ adjustments: Borrow(Ref('?2, Mut)) }", ); } |