src/tools/rust-analyzer/crates/ra_hir_ty/src/tests/method_resolution.rs

use insta::assert_snapshot;

use super::{check_types, infer};

#[test]
fn infer_slice_method() {
    assert_snapshot!(
        infer(r#"
#[lang = "slice"]
impl<T> [T] {
    fn foo(&self) -> T {
        loop {}
    }
}

#[lang = "slice_alloc"]
impl<T> [T] {}

fn test(x: &[u8]) {
    <[_]>::foo(x);
}
"#),
        @r###"
    44..48 'self': &[T]
    55..78 '{     ...     }': T
    65..72 'loop {}': !
    70..72 '{}': ()
    130..131 'x': &[u8]
    140..162 '{     ...(x); }': ()
    146..156 '<[_]>::foo': fn foo<u8>(&[u8]) -> u8
    146..159 '<[_]>::foo(x)': u8
    157..158 'x': &[u8]
    "###
    );
}

#[test]
fn infer_associated_method_struct() {
    assert_snapshot!(
        infer(r#"
struct A { x: u32 }

impl A {
    fn new() -> A {
        A { x: 0 }
    }
}
fn test() {
    let a = A::new();
    a.x;
}
"#),
        @r###"
    48..74 '{     ...     }': A
    58..68 'A { x: 0 }': A
    65..66 '0': u32
    87..121 '{     ...a.x; }': ()
    97..98 'a': A
    101..107 'A::new': fn new() -> A
    101..109 'A::new()': A
    115..116 'a': A
    115..118 'a.x': u32
    "###
    );
}

#[test]
fn infer_associated_method_enum() {
    assert_snapshot!(
        infer(r#"
enum A { B, C }

impl A {
    pub fn b() -> A {
        A::B
    }
    pub fn c() -> A {
        A::C
    }
}
fn test() {
    let a = A::b();
    a;
    let c = A::c();
    c;
}
"#),
        @r###"
    46..66 '{     ...     }': A
    56..60 'A::B': A
    87..107 '{     ...     }': A
    97..101 'A::C': A
    120..177 '{     ...  c; }': ()
    130..131 'a': A
    134..138 'A::b': fn b() -> A
    134..140 'A::b()': A
    146..147 'a': A
    157..158 'c': A
    161..165 'A::c': fn c() -> A
    161..167 'A::c()': A
    173..174 'c': A
    "###
    );
}

#[test]
fn infer_associated_method_with_modules() {
    assert_snapshot!(
        infer(r#"
mod a {
    struct A;
    impl A { pub fn thing() -> A { A {} }}
}

mod b {
    struct B;
    impl B { pub fn thing() -> u32 { 99 }}

    mod c {
        struct C;
        impl C { pub fn thing() -> C { C {} }}
    }
}
use b::c;

fn test() {
    let x = a::A::thing();
    let y = b::B::thing();
    let z = c::C::thing();
}
"#),
        @r###"
    55..63 '{ A {} }': A
    57..61 'A {}': A
    125..131 '{ 99 }': u32
    127..129 '99': u32
    201..209 '{ C {} }': C
    203..207 'C {}': C
    240..324 '{     ...g(); }': ()
    250..251 'x': A
    254..265 'a::A::thing': fn thing() -> A
    254..267 'a::A::thing()': A
    277..278 'y': u32
    281..292 'b::B::thing': fn thing() -> u32
    281..294 'b::B::thing()': u32
    304..305 'z': C
    308..319 'c::C::thing': fn thing() -> C
    308..321 'c::C::thing()': C
    "###
    );
}

#[test]
fn infer_associated_method_generics() {
    assert_snapshot!(
        infer(r#"
struct Gen<T> {
    val: T
}

impl<T> Gen<T> {
    pub fn make(val: T) -> Gen<T> {
        Gen { val }
    }
}

fn test() {
    let a = Gen::make(0u32);
}
"#),
        @r###"
    63..66 'val': T
    81..108 '{     ...     }': Gen<T>
    91..102 'Gen { val }': Gen<T>
    97..100 'val': T
    122..154 '{     ...32); }': ()
    132..133 'a': Gen<u32>
    136..145 'Gen::make': fn make<u32>(u32) -> Gen<u32>
    136..151 'Gen::make(0u32)': Gen<u32>
    146..150 '0u32': u32
    "###
    );
}

#[test]
fn infer_associated_method_generics_without_args() {
    assert_snapshot!(
        infer(r#"
struct Gen<T> {
    val: T
}

impl<T> Gen<T> {
    pub fn make() -> Gen<T> {
        loop { }
    }
}

fn test() {
    let a = Gen::<u32>::make();
}
"#),
        @r###"
    75..99 '{     ...     }': Gen<T>
    85..93 'loop { }': !
    90..93 '{ }': ()
    113..148 '{     ...e(); }': ()
    123..124 'a': Gen<u32>
    127..143 'Gen::<...::make': fn make<u32>() -> Gen<u32>
    127..145 'Gen::<...make()': Gen<u32>
    "###
    );
}

#[test]
fn infer_associated_method_generics_2_type_params_without_args() {
    assert_snapshot!(
        infer(r#"
struct Gen<T, U> {
    val: T,
    val2: U,
}

impl<T> Gen<u32, T> {
    pub fn make() -> Gen<u32,T> {
        loop { }
    }
}

fn test() {
    let a = Gen::<u32, u64>::make();
}
"#),
        @r###"
    101..125 '{     ...     }': Gen<u32, T>
    111..119 'loop { }': !
    116..119 '{ }': ()
    139..179 '{     ...e(); }': ()
    149..150 'a': Gen<u32, u64>
    153..174 'Gen::<...::make': fn make<u64>() -> Gen<u32, u64>
    153..176 'Gen::<...make()': Gen<u32, u64>
    "###
    );
}

#[test]
fn cross_crate_associated_method_call() {
    check_types(
        r#"
//- /main.rs crate:main deps:other_crate
fn test() {
    let x = other_crate::foo::S::thing();
    x;
} //^ i128

//- /lib.rs crate:other_crate
mod foo {
    struct S;
    impl S {
        fn thing() -> i128 {}
    }
}
"#,
    );
}

#[test]
fn infer_trait_method_simple() {
    // the trait implementation is intentionally incomplete -- it shouldn't matter
    assert_snapshot!(
        infer(r#"
trait Trait1 {
    fn method(&self) -> u32;
}
struct S1;
impl Trait1 for S1 {}
trait Trait2 {
    fn method(&self) -> i128;
}
struct S2;
impl Trait2 for S2 {}
fn test() {
    S1.method(); // -> u32
    S2.method(); // -> i128
}
"#),
        @r###"
    30..34 'self': &Self
    109..113 'self': &Self
    169..227 '{     ...i128 }': ()
    175..177 'S1': S1
    175..186 'S1.method()': u32
    202..204 'S2': S2
    202..213 'S2.method()': i128
    "###
    );
}

#[test]
fn infer_trait_method_scoped() {
    // the trait implementation is intentionally incomplete -- it shouldn't matter
    assert_snapshot!(
        infer(r#"
struct S;
mod foo {
    pub trait Trait1 {
        fn method(&self) -> u32;
    }
    impl Trait1 for super::S {}
}
mod bar {
    pub trait Trait2 {
        fn method(&self) -> i128;
    }
    impl Trait2 for super::S {}
}

mod foo_test {
    use super::S;
    use super::foo::Trait1;
    fn test() {
        S.method(); // -> u32
    }
}

mod bar_test {
    use super::S;
    use super::bar::Trait2;
    fn test() {
        S.method(); // -> i128
    }
}
"#),
        @r###"
    62..66 'self': &Self
    168..172 'self': &Self
    299..336 '{     ...     }': ()
    309..310 'S': S
    309..319 'S.method()': u32
    415..453 '{     ...     }': ()
    425..426 'S': S
    425..435 'S.method()': i128
    "###
    );
}

#[test]
fn infer_trait_method_generic_1() {
    // the trait implementation is intentionally incomplete -- it shouldn't matter
    assert_snapshot!(
        infer(r#"
trait Trait<T> {
    fn method(&self) -> T;
}
struct S;
impl Trait<u32> for S {}
fn test() {
    S.method();
}
"#),
        @r###"
    32..36 'self': &Self
    91..110 '{     ...d(); }': ()
    97..98 'S': S
    97..107 'S.method()': u32
    "###
    );
}

#[test]
fn infer_trait_method_generic_more_params() {
    // the trait implementation is intentionally incomplete -- it shouldn't matter
    assert_snapshot!(
        infer(r#"
trait Trait<T1, T2, T3> {
    fn method1(&self) -> (T1, T2, T3);
    fn method2(&self) -> (T3, T2, T1);
}
struct S1;
impl Trait<u8, u16, u32> for S1 {}
struct S2;
impl<T> Trait<i8, i16, T> for S2 {}
fn test() {
    S1.method1(); // u8, u16, u32
    S1.method2(); // u32, u16, u8
    S2.method1(); // i8, i16, {unknown}
    S2.method2(); // {unknown}, i16, i8
}
"#),
        @r###"
    42..46 'self': &Self
    81..85 'self': &Self
    209..360 '{     ..., i8 }': ()
    215..217 'S1': S1
    215..227 'S1.method1()': (u8, u16, u32)
    249..251 'S1': S1
    249..261 'S1.method2()': (u32, u16, u8)
    283..285 'S2': S2
    283..295 'S2.method1()': (i8, i16, {unknown})
    323..325 'S2': S2
    323..335 'S2.method2()': ({unknown}, i16, i8)
    "###
    );
}

#[test]
fn infer_trait_method_generic_2() {
    // the trait implementation is intentionally incomplete -- it shouldn't matter
    assert_snapshot!(
        infer(r#"
trait Trait<T> {
    fn method(&self) -> T;
}
struct S<T>(T);
impl<U> Trait<U> for S<U> {}
fn test() {
    S(1u32).method();
}
"#),
        @r###"
    32..36 'self': &Self
    101..126 '{     ...d(); }': ()
    107..108 'S': S<u32>(u32) -> S<u32>
    107..114 'S(1u32)': S<u32>
    107..123 'S(1u32...thod()': u32
    109..113 '1u32': u32
    "###
    );
}

#[test]
fn infer_trait_assoc_method() {
    assert_snapshot!(
        infer(r#"
trait Default {
    fn default() -> Self;
}
struct S;
impl Default for S {}
fn test() {
    let s1: S = Default::default();
    let s2 = S::default();
    let s3 = <S as Default>::default();
}
"#),
        @r###"
    86..192 '{     ...t(); }': ()
    96..98 's1': S
    104..120 'Defaul...efault': fn default<S>() -> S
    104..122 'Defaul...ault()': S
    132..134 's2': S
    137..147 'S::default': fn default<S>() -> S
    137..149 'S::default()': S
    159..161 's3': S
    164..187 '<S as ...efault': fn default<S>() -> S
    164..189 '<S as ...ault()': S
    "###
    );
}

#[test]
fn infer_trait_assoc_method_generics_1() {
    assert_snapshot!(
        infer(r#"
trait Trait<T> {
    fn make() -> T;
}
struct S;
impl Trait<u32> for S {}
struct G<T>;
impl<T> Trait<T> for G<T> {}
fn test() {
    let a = S::make();
    let b = G::<u64>::make();
    let c: f64 = G::make();
}
"#),
        @r###"
    126..210 '{     ...e(); }': ()
    136..137 'a': u32
    140..147 'S::make': fn make<S, u32>() -> u32
    140..149 'S::make()': u32
    159..160 'b': u64
    163..177 'G::<u64>::make': fn make<G<u64>, u64>() -> u64
    163..179 'G::<u6...make()': u64
    189..190 'c': f64
    198..205 'G::make': fn make<G<f64>, f64>() -> f64
    198..207 'G::make()': f64
    "###
    );
}

#[test]
fn infer_trait_assoc_method_generics_2() {
    assert_snapshot!(
        infer(r#"
trait Trait<T> {
    fn make<U>() -> (T, U);
}
struct S;
impl Trait<u32> for S {}
struct G<T>;
impl<T> Trait<T> for G<T> {}
fn test() {
    let a = S::make::<i64>();
    let b: (_, i64) = S::make();
    let c = G::<u32>::make::<i64>();
    let d: (u32, _) = G::make::<i64>();
    let e: (u32, i64) = G::make();
}
"#),
        @r###"
    134..312 '{     ...e(); }': ()
    144..145 'a': (u32, i64)
    148..162 'S::make::<i64>': fn make<S, u32, i64>() -> (u32, i64)
    148..164 'S::mak...i64>()': (u32, i64)
    174..175 'b': (u32, i64)
    188..195 'S::make': fn make<S, u32, i64>() -> (u32, i64)
    188..197 'S::make()': (u32, i64)
    207..208 'c': (u32, i64)
    211..232 'G::<u3...:<i64>': fn make<G<u32>, u32, i64>() -> (u32, i64)
    211..234 'G::<u3...i64>()': (u32, i64)
    244..245 'd': (u32, i64)
    258..272 'G::make::<i64>': fn make<G<u32>, u32, i64>() -> (u32, i64)
    258..274 'G::mak...i64>()': (u32, i64)
    284..285 'e': (u32, i64)
    300..307 'G::make': fn make<G<u32>, u32, i64>() -> (u32, i64)
    300..309 'G::make()': (u32, i64)
    "###
    );
}

#[test]
fn infer_trait_assoc_method_generics_3() {
    assert_snapshot!(
        infer(r#"
trait Trait<T> {
    fn make() -> (Self, T);
}
struct S<T>;
impl Trait<i64> for S<i32> {}
fn test() {
    let a = S::make();
}
"#),
        @r###"
    100..126 '{     ...e(); }': ()
    110..111 'a': (S<i32>, i64)
    114..121 'S::make': fn make<S<i32>, i64>() -> (S<i32>, i64)
    114..123 'S::make()': (S<i32>, i64)
    "###
    );
}

#[test]
fn infer_trait_assoc_method_generics_4() {
    assert_snapshot!(
        infer(r#"
trait Trait<T> {
    fn make() -> (Self, T);
}
struct S<T>;
impl Trait<i64> for S<u64> {}
impl Trait<i32> for S<u32> {}
fn test() {
    let a: (S<u64>, _) = S::make();
    let b: (_, i32) = S::make();
}
"#),
        @r###"
    130..202 '{     ...e(); }': ()
    140..141 'a': (S<u64>, i64)
    157..164 'S::make': fn make<S<u64>, i64>() -> (S<u64>, i64)
    157..166 'S::make()': (S<u64>, i64)
    176..177 'b': (S<u32>, i32)
    190..197 'S::make': fn make<S<u32>, i32>() -> (S<u32>, i32)
    190..199 'S::make()': (S<u32>, i32)
    "###
    );
}

#[test]
fn infer_trait_assoc_method_generics_5() {
    assert_snapshot!(
        infer(r#"
trait Trait<T> {
    fn make<U>() -> (Self, T, U);
}
struct S<T>;
impl Trait<i64> for S<u64> {}
fn test() {
    let a = <S as Trait<i64>>::make::<u8>();
    let b: (S<u64>, _, _) = Trait::<i64>::make::<u8>();
}
"#),
        @r###"
    106..210 '{     ...>(); }': ()
    116..117 'a': (S<u64>, i64, u8)
    120..149 '<S as ...::<u8>': fn make<S<u64>, i64, u8>() -> (S<u64>, i64, u8)
    120..151 '<S as ...<u8>()': (S<u64>, i64, u8)
    161..162 'b': (S<u64>, i64, u8)
    181..205 'Trait:...::<u8>': fn make<S<u64>, i64, u8>() -> (S<u64>, i64, u8)
    181..207 'Trait:...<u8>()': (S<u64>, i64, u8)
    "###
    );
}

#[test]
fn infer_call_trait_method_on_generic_param_1() {
    assert_snapshot!(
        infer(r#"
trait Trait {
    fn method(&self) -> u32;
}
fn test<T: Trait>(t: T) {
    t.method();
}
"#),
        @r###"
    29..33 'self': &Self
    63..64 't': T
    69..88 '{     ...d(); }': ()
    75..76 't': T
    75..85 't.method()': u32
    "###
    );
}

#[test]
fn infer_call_trait_method_on_generic_param_2() {
    assert_snapshot!(
        infer(r#"
trait Trait<T> {
    fn method(&self) -> T;
}
fn test<U, T: Trait<U>>(t: T) {
    t.method();
}
"#),
        @r###"
    32..36 'self': &Self
    70..71 't': T
    76..95 '{     ...d(); }': ()
    82..83 't': T
    82..92 't.method()': U
    "###
    );
}

#[test]
fn infer_with_multiple_trait_impls() {
    assert_snapshot!(
        infer(r#"
trait Into<T> {
    fn into(self) -> T;
}
struct S;
impl Into<u32> for S {}
impl Into<u64> for S {}
fn test() {
    let x: u32 = S.into();
    let y: u64 = S.into();
    let z = Into::<u64>::into(S);
}
"#),
        @r###"
    28..32 'self': Self
    110..201 '{     ...(S); }': ()
    120..121 'x': u32
    129..130 'S': S
    129..137 'S.into()': u32
    147..148 'y': u64
    156..157 'S': S
    156..164 'S.into()': u64
    174..175 'z': u64
    178..195 'Into::...::into': fn into<S, u64>(S) -> u64
    178..198 'Into::...nto(S)': u64
    196..197 'S': S
    "###
    );
}

#[test]
fn method_resolution_unify_impl_self_type() {
    check_types(
        r#"
struct S<T>;
impl S<u32> { fn foo(&self) -> u8 {} }
impl S<i32> { fn foo(&self) -> i8 {} }
fn test() { (S::<u32>.foo(), S::<i32>.foo()); }
          //^ (u8, i8)
"#,
    );
}

#[test]
fn method_resolution_trait_before_autoref() {
    check_types(
        r#"
trait Trait { fn foo(self) -> u128; }
struct S;
impl S { fn foo(&self) -> i8 { 0 } }
impl Trait for S { fn foo(self) -> u128 { 0 } }
fn test() { S.foo(); }
                //^ u128
"#,
    );
}

#[test]
fn method_resolution_by_value_before_autoref() {
    check_types(
        r#"
trait Clone { fn clone(&self) -> Self; }
struct S;
impl Clone for S {}
impl Clone for &S {}
fn test() { (S.clone(), (&S).clone(), (&&S).clone()); }
          //^ (S, S, &S)
"#,
    );
}

#[test]
fn method_resolution_trait_before_autoderef() {
    check_types(
        r#"
trait Trait { fn foo(self) -> u128; }
struct S;
impl S { fn foo(self) -> i8 { 0 } }
impl Trait for &S { fn foo(self) -> u128 { 0 } }
fn test() { (&S).foo(); }
                   //^ u128
"#,
    );
}

#[test]
fn method_resolution_impl_before_trait() {
    check_types(
        r#"
trait Trait { fn foo(self) -> u128; }
struct S;
impl S { fn foo(self) -> i8 { 0 } }
impl Trait for S { fn foo(self) -> u128 { 0 } }
fn test() { S.foo(); }
                //^ i8
"#,
    );
}

#[test]
fn method_resolution_impl_ref_before_trait() {
    check_types(
        r#"
trait Trait { fn foo(self) -> u128; }
struct S;
impl S { fn foo(&self) -> i8 { 0 } }
impl Trait for &S { fn foo(self) -> u128 { 0 } }
fn test() { S.foo(); }
                //^ i8
"#,
    );
}

#[test]
fn method_resolution_trait_autoderef() {
    check_types(
        r#"
trait Trait { fn foo(self) -> u128; }
struct S;
impl Trait for S { fn foo(self) -> u128 { 0 } }
fn test() { (&S).foo(); }
                   //^ u128
"#,
    );
}

#[test]
fn method_resolution_unsize_array() {
    check_types(
        r#"
#[lang = "slice"]
impl<T> [T] {
    fn len(&self) -> usize { loop {} }
}
fn test() {
    let a = [1, 2, 3];
    a.len();
}       //^ usize
"#,
    );
}

#[test]
fn method_resolution_trait_from_prelude() {
    check_types(
        r#"
//- /main.rs crate:main deps:other_crate
struct S;
impl Clone for S {}

fn test() {
    S.clone();
          //^ S
}

//- /lib.rs crate:other_crate
#[prelude_import] use foo::*;

mod foo {
    trait Clone {
        fn clone(&self) -> Self;
    }
}
"#,
    );
}

#[test]
fn method_resolution_where_clause_for_unknown_trait() {
    // The blanket impl currently applies because we ignore the unresolved where clause
    check_types(
        r#"
trait Trait { fn foo(self) -> u128; }
struct S;
impl<T> Trait for T where T: UnknownTrait {}
fn test() { (&S).foo(); }
                   //^ u128
"#,
    );
}

#[test]
fn method_resolution_where_clause_not_met() {
    // The blanket impl shouldn't apply because we can't prove S: Clone
    // This is also to make sure that we don't resolve to the foo method just
    // because that's the only method named foo we can find, which would make
    // the below tests not work
    check_types(
        r#"
trait Clone {}
trait Trait { fn foo(self) -> u128; }
struct S;
impl<T> Trait for T where T: Clone {}
fn test() { (&S).foo(); }
                   //^ {unknown}
"#,
    );
}

#[test]
fn method_resolution_where_clause_inline_not_met() {
    // The blanket impl shouldn't apply because we can't prove S: Clone
    check_types(
        r#"
trait Clone {}
trait Trait { fn foo(self) -> u128; }
struct S;
impl<T: Clone> Trait for T {}
fn test() { (&S).foo(); }
                   //^ {unknown}
"#,
    );
}

#[test]
fn method_resolution_where_clause_1() {
    check_types(
        r#"
trait Clone {}
trait Trait { fn foo(self) -> u128; }
struct S;
impl Clone for S {}
impl<T> Trait for T where T: Clone {}
fn test() { S.foo(); }
                //^ u128
"#,
    );
}

#[test]
fn method_resolution_where_clause_2() {
    check_types(
        r#"
trait Into<T> { fn into(self) -> T; }
trait From<T> { fn from(other: T) -> Self; }
struct S1;
struct S2;
impl From<S2> for S1 {}
impl<T, U> Into<U> for T where U: From<T> {}
fn test() { S2.into(); }
                  //^ {unknown}
"#,
    );
}

#[test]
fn method_resolution_where_clause_inline() {
    check_types(
        r#"
trait Into<T> { fn into(self) -> T; }
trait From<T> { fn from(other: T) -> Self; }
struct S1;
struct S2;
impl From<S2> for S1 {}
impl<T, U: From<T>> Into<U> for T {}
fn test() { S2.into(); }
                  //^ {unknown}
"#,
    );
}

#[test]
fn method_resolution_overloaded_method() {
    test_utils::mark::check!(impl_self_type_match_without_receiver);
    check_types(
        r#"
struct Wrapper<T>(T);
struct Foo<T>(T);
struct Bar<T>(T);

impl<T> Wrapper<Foo<T>> {
    pub fn new(foo_: T) -> Self {
        Wrapper(Foo(foo_))
    }
}

impl<T> Wrapper<Bar<T>> {
    pub fn new(bar_: T) -> Self {
        Wrapper(Bar(bar_))
    }
}

fn main() {
    let a = Wrapper::<Foo<f32>>::new(1.0);
    let b = Wrapper::<Bar<f32>>::new(1.0);
    (a, b);
  //^ (Wrapper<Foo<f32>>, Wrapper<Bar<f32>>)
}
"#,
    );
}

#[test]
fn method_resolution_encountering_fn_type() {
    check_types(
        r#"
//- /main.rs
fn foo() {}
trait FnOnce { fn call(self); }
fn test() { foo.call(); }
                   //^ {unknown}
"#,
    );
}

#[test]
fn method_resolution_non_parameter_type() {
    check_types(
        r#"
mod a {
    pub trait Foo {
        fn foo(&self);
    }
}

struct Wrapper<T>(T);
fn foo<T>(t: Wrapper<T>)
where
    Wrapper<T>: a::Foo,
{
    t.foo();
}       //^ {unknown}
"#,
    );
}

#[test]
fn method_resolution_3373() {
    check_types(
        r#"
struct A<T>(T);

impl A<i32> {
    fn from(v: i32) -> A<i32> { A(v) }
}

fn main() {
    A::from(3);
}          //^ A<i32>
"#,
    );
}

#[test]
fn method_resolution_slow() {
    // this can get quite slow if we set the solver size limit too high
    check_types(
        r#"
trait SendX {}

struct S1; impl SendX for S1 {}
struct S2; impl SendX for S2 {}
struct U1;

trait Trait { fn method(self); }

struct X1<A, B> {}
impl<A, B> SendX for X1<A, B> where A: SendX, B: SendX {}

struct S<B, C> {}

trait FnX {}

impl<B, C> Trait for S<B, C> where C: FnX, B: SendX {}

fn test() { (S {}).method(); }
                        //^ ()
"#,
    );
}

#[test]
fn dyn_trait_super_trait_not_in_scope() {
    assert_snapshot!(
        infer(r#"
mod m {
    pub trait SuperTrait {
        fn foo(&self) -> u32 { 0 }
    }
}
trait Trait: m::SuperTrait {}

struct S;
impl m::SuperTrait for S {}
impl Trait for S {}

fn test(d: &dyn Trait) {
    d.foo();
}
"#),
        @r###"
    51..55 'self': &Self
    64..69 '{ 0 }': u32
    66..67 '0': u32
    176..177 'd': &dyn Trait
    191..207 '{     ...o(); }': ()
    197..198 'd': &dyn Trait
    197..204 'd.foo()': u32
    "###
    );
}