let message = |action| {
format!(
"the following {traits_define} an item `{name}`, perhaps you need to {action} \
- {one_of_them}:",
+ {one_of_them}:",
traits_define =
if candidates.len() == 1 { "trait defines" } else { "traits define" },
action = action,
}
if !suggested {
- let mut msg = message(if let Some(param) = param_type {
+ let action = if let Some(param) = param_type {
format!("restrict type parameter `{}` with", param)
} else {
"implement".to_string()
- });
- for (i, trait_info) in candidates.iter().enumerate() {
- msg.push_str(&format!(
- "\ncandidate #{}: `{}`",
- i + 1,
- self.tcx.def_path_str(trait_info.def_id),
- ));
+ };
+ let mut use_note = true;
+ if let [trait_info] = &candidates[..] {
+ if let Some(span) = self.tcx.hir().span_if_local(trait_info.def_id) {
+ err.span_label(
+ self.tcx.sess.source_map().def_span(span),
+ &format!("this trait defines an item `{}`", item_name),
+ );
+ use_note = false
+ }
+ }
+ if use_note {
+ let mut msg = message(action);
+ for (i, trait_info) in candidates.iter().enumerate() {
+ msg.push_str(&format!(
+ "\ncandidate #{}: `{}`",
+ i + 1,
+ self.tcx.def_path_str(trait_info.def_id),
+ ));
+ }
+ err.note(&msg[..]);
}
- err.note(&msg[..]);
}
}
}
error[E0599]: no associated item named `ID` found for type `i32` in the current scope
--> $DIR/associated-const-no-item.rs:5:23
|
+LL | trait Foo {
+ | --------- this trait defines an item `ID`
+...
LL | const X: i32 = <i32>::ID;
| ^^ associated item not found in `i32`
|
= help: items from traits can only be used if the trait is implemented and in scope
- = note: the following trait defines an item `ID`, perhaps you need to implement it:
- candidate #1: `Foo`
error: aborting due to previous error
|
LL | a.test_mut();
| ^^^^^^^^ help: there is a method with a similar name: `get_mut`
+...
+LL | trait MyIter {
+ | ------------ this trait defines an item `test_mut`
|
= help: items from traits can only be used if the trait is implemented and in scope
- = note: the following trait defines an item `test_mut`, perhaps you need to implement it:
- candidate #1: `MyIter`
error[E0599]: no method named `test` found for struct `std::vec::Vec<{integer}>` in the current scope
--> $DIR/auto-ref-slice-plus-ref.rs:8:7
|
LL | a.test();
| ^^^^ method not found in `std::vec::Vec<{integer}>`
+...
+LL | trait MyIter {
+ | ------------ this trait defines an item `test`
|
= help: items from traits can only be used if the trait is implemented and in scope
- = note: the following trait defines an item `test`, perhaps you need to implement it:
- candidate #1: `MyIter`
error[E0599]: no method named `test` found for array `[{integer}; 1]` in the current scope
--> $DIR/auto-ref-slice-plus-ref.rs:10:11
|
LL | ([1]).test();
| ^^^^ method not found in `[{integer}; 1]`
+...
+LL | trait MyIter {
+ | ------------ this trait defines an item `test`
|
= help: items from traits can only be used if the trait is implemented and in scope
- = note: the following trait defines an item `test`, perhaps you need to implement it:
- candidate #1: `MyIter`
error[E0599]: no method named `test` found for reference `&[{integer}; 1]` in the current scope
--> $DIR/auto-ref-slice-plus-ref.rs:11:12
|
LL | (&[1]).test();
| ^^^^ method not found in `&[{integer}; 1]`
+...
+LL | trait MyIter {
+ | ------------ this trait defines an item `test`
|
= help: items from traits can only be used if the trait is implemented and in scope
- = note: the following trait defines an item `test`, perhaps you need to implement it:
- candidate #1: `MyIter`
error: aborting due to 4 previous errors
error[E0599]: no method named `foo` found for struct `Bar` in the current scope
--> $DIR/issue-21659-show-relevant-trait-impls-3.rs:20:8
|
+LL | trait Foo<A> {
+ | ------------ this trait defines an item `foo`
+...
LL | struct Bar;
| ----------- method `foo` not found for this
...
| ^^^ method not found in `Bar`
|
= help: items from traits can only be used if the trait is implemented and in scope
- = note: the following trait defines an item `foo`, perhaps you need to implement it:
- candidate #1: `Foo`
error: aborting due to previous error
error[E0599]: no method named `method2` found for type `u64` in the current scope
--> $DIR/no-method-suggested-traits.rs:45:10
|
+LL | pub trait Bar {
+ | ------------- this trait defines an item `method2`
+...
LL | 1u64.method2();
| ^^^^^^^ method not found in `u64`
|
= help: items from traits can only be used if the trait is implemented and in scope
- = note: the following trait defines an item `method2`, perhaps you need to implement it:
- candidate #1: `foo::Bar`
error[E0599]: no method named `method2` found for struct `std::rc::Rc<&mut std::boxed::Box<&u64>>` in the current scope
--> $DIR/no-method-suggested-traits.rs:47:44
|
+LL | pub trait Bar {
+ | ------------- this trait defines an item `method2`
+...
LL | std::rc::Rc::new(&mut Box::new(&1u64)).method2();
| ^^^^^^^ method not found in `std::rc::Rc<&mut std::boxed::Box<&u64>>`
|
= help: items from traits can only be used if the trait is implemented and in scope
- = note: the following trait defines an item `method2`, perhaps you need to implement it:
- candidate #1: `foo::Bar`
error[E0599]: no method named `method2` found for struct `no_method_suggested_traits::Foo` in the current scope
--> $DIR/no-method-suggested-traits.rs:50:37
|
+LL | pub trait Bar {
+ | ------------- this trait defines an item `method2`
+...
LL | no_method_suggested_traits::Foo.method2();
| ^^^^^^^ method not found in `no_method_suggested_traits::Foo`
|
= help: items from traits can only be used if the trait is implemented and in scope
- = note: the following trait defines an item `method2`, perhaps you need to implement it:
- candidate #1: `foo::Bar`
error[E0599]: no method named `method2` found for struct `std::rc::Rc<&mut std::boxed::Box<&no_method_suggested_traits::Foo>>` in the current scope
--> $DIR/no-method-suggested-traits.rs:52:71
|
+LL | pub trait Bar {
+ | ------------- this trait defines an item `method2`
+...
LL | std::rc::Rc::new(&mut Box::new(&no_method_suggested_traits::Foo)).method2();
| ^^^^^^^ method not found in `std::rc::Rc<&mut std::boxed::Box<&no_method_suggested_traits::Foo>>`
|
= help: items from traits can only be used if the trait is implemented and in scope
- = note: the following trait defines an item `method2`, perhaps you need to implement it:
- candidate #1: `foo::Bar`
error[E0599]: no method named `method2` found for enum `no_method_suggested_traits::Bar` in the current scope
--> $DIR/no-method-suggested-traits.rs:54:40
|
+LL | pub trait Bar {
+ | ------------- this trait defines an item `method2`
+...
LL | no_method_suggested_traits::Bar::X.method2();
| ^^^^^^^ method not found in `no_method_suggested_traits::Bar`
|
= help: items from traits can only be used if the trait is implemented and in scope
- = note: the following trait defines an item `method2`, perhaps you need to implement it:
- candidate #1: `foo::Bar`
error[E0599]: no method named `method2` found for struct `std::rc::Rc<&mut std::boxed::Box<&no_method_suggested_traits::Bar>>` in the current scope
--> $DIR/no-method-suggested-traits.rs:56:74
|
+LL | pub trait Bar {
+ | ------------- this trait defines an item `method2`
+...
LL | std::rc::Rc::new(&mut Box::new(&no_method_suggested_traits::Bar::X)).method2();
| ^^^^^^^ method not found in `std::rc::Rc<&mut std::boxed::Box<&no_method_suggested_traits::Bar>>`
|
= help: items from traits can only be used if the trait is implemented and in scope
- = note: the following trait defines an item `method2`, perhaps you need to implement it:
- candidate #1: `foo::Bar`
error[E0599]: no method named `method3` found for struct `Foo` in the current scope
--> $DIR/no-method-suggested-traits.rs:59:9
error[E0599]: no method named `foo` found for reference `&dyn Foo` in the current scope
--> $DIR/issue-5153.rs:10:27
|
+LL | trait Foo {
+ | --------- this trait defines an item `foo`
+...
LL | (&5isize as &dyn Foo).foo();
| ^^^ method not found in `&dyn Foo`
|
= help: items from traits can only be used if the trait is implemented and in scope
- = note: the following trait defines an item `foo`, perhaps you need to implement it:
- candidate #1: `Foo`
error: aborting due to previous error
error[E0599]: no method named `f` found for fn pointer `fn(&u8)` in the current scope
--> $DIR/issue-57362-1.rs:20:7
|
+LL | trait Trait {
+ | ----------- this trait defines an item `f`
+...
LL | a.f();
| ^ method not found in `fn(&u8)`
|
= note: `a` is a function, perhaps you wish to call it
= help: items from traits can only be used if the trait is implemented and in scope
- = note: the following trait defines an item `f`, perhaps you need to implement it:
- candidate #1: `Trait`
error: aborting due to previous error
error[E0599]: no function or associated item named `make_g` found for fn pointer `for<'r> fn(&'r ())` in the current scope
--> $DIR/issue-57362-2.rs:22:25
|
+LL | trait X {
+ | ------- this trait defines an item `make_g`
+...
LL | let x = <fn (&())>::make_g();
| ^^^^^^ function or associated item not found in `for<'r> fn(&'r ())`
|
= help: items from traits can only be used if the trait is implemented and in scope
- = note: the following trait defines an item `make_g`, perhaps you need to implement it:
- candidate #1: `X`
error: aborting due to previous error
error[E0599]: no method named `bind` found for array `[&str; 1]` in the current scope
--> $DIR/issue-2149.rs:13:12
|
+LL | trait VecMonad<A> {
+ | ----------------- this trait defines an item `bind`
+...
LL | ["hi"].bind(|x| [x] );
| ^^^^ method not found in `[&str; 1]`
|
= help: items from traits can only be used if the trait is implemented and in scope
- = note: the following trait defines an item `bind`, perhaps you need to implement it:
- candidate #1: `VecMonad`
error: aborting due to 2 previous errors
error[E0599]: no method named `owned` found for reference `&dyn Foo` in the current scope
--> $DIR/object-pointer-types.rs:11:7
|
+LL | trait Foo {
+ | --------- this trait defines an item `owned`
+...
LL | x.owned();
| ^^^^^ method not found in `&dyn Foo`
|
= help: items from traits can only be used if the trait is implemented and in scope
- = note: the following trait defines an item `owned`, perhaps you need to implement it:
- candidate #1: `Foo`
error[E0599]: no method named `owned` found for mutable reference `&mut dyn Foo` in the current scope
--> $DIR/object-pointer-types.rs:17:7
|
+LL | trait Foo {
+ | --------- this trait defines an item `owned`
+...
LL | x.owned();
| ^^^^^ method not found in `&mut dyn Foo`
|
= help: items from traits can only be used if the trait is implemented and in scope
- = note: the following trait defines an item `owned`, perhaps you need to implement it:
- candidate #1: `Foo`
error[E0599]: no method named `managed` found for struct `std::boxed::Box<(dyn Foo + 'static)>` in the current scope
--> $DIR/object-pointer-types.rs:23:7
--> $DIR/point-at-arbitrary-self-type-trait-method.rs:9:7
|
LL | trait B { fn foo(self: Box<Self>); }
- | --- the method is available for `std::boxed::Box<A>` here
+ | ------- --- the method is available for `std::boxed::Box<A>` here
+ | |
+ | this trait defines an item `foo`
LL | struct A;
| --------- method `foo` not found for this
...
| ^^^ method not found in `A`
|
= help: items from traits can only be used if the trait is implemented and in scope
- = note: the following trait defines an item `foo`, perhaps you need to implement it:
- candidate #1: `B`
error: aborting due to previous error
error[E0599]: no method named `foo_one` found for struct `MyStruct` in the current scope
--> $DIR/specialization-trait-not-implemented.rs:22:29
|
+LL | trait Foo {
+ | --------- this trait defines an item `foo_one`
+...
LL | struct MyStruct;
| ----------------
| |
= note: the method `foo_one` exists but the following trait bounds were not satisfied:
`MyStruct: Foo`
= help: items from traits can only be used if the trait is implemented and in scope
- = note: the following trait defines an item `foo_one`, perhaps you need to implement it:
- candidate #1: `Foo`
error: aborting due to previous error
LL | struct S;
| --------- method `a` not found for this
...
+LL | trait A {
+ | ------- this trait defines an item `a`
+...
LL | S.a();
| ^ method not found in `S`
|
= help: items from traits can only be used if the trait is implemented and in scope
- = note: the following trait defines an item `a`, perhaps you need to implement it:
- candidate #1: `method::A`
error[E0599]: no method named `b` found for struct `S` in the current scope
--> $DIR/trait-item-privacy.rs:68:7
LL | struct S;
| --------- function or associated item `a` not found for this
...
+LL | trait A {
+ | ------- this trait defines an item `a`
+...
LL | S::a(&S);
| ^ function or associated item not found in `S`
|
= help: items from traits can only be used if the trait is implemented and in scope
- = note: the following trait defines an item `a`, perhaps you need to implement it:
- candidate #1: `method::A`
error[E0599]: no function or associated item named `b` found for struct `S` in the current scope
--> $DIR/trait-item-privacy.rs:80:8
LL | struct S;
| --------- associated item `A` not found for this
...
+LL | trait A {
+ | ------- this trait defines an item `A`
+...
LL | S::A;
| ^ associated item not found in `S`
|
= help: items from traits can only be used if the trait is implemented and in scope
- = note: the following trait defines an item `A`, perhaps you need to implement it:
- candidate #1: `assoc_const::A`
error[E0599]: no associated item named `B` found for struct `S` in the current scope
--> $DIR/trait-item-privacy.rs:98:8
error[E0599]: no method named `test` found for type `i32` in the current scope
--> $DIR/trivial-bounds-leak.rs:24:10
|
+LL | pub trait Foo {
+ | ------------- this trait defines an item `test`
+...
LL | 3i32.test();
| ^^^^ method not found in `i32`
|
= help: items from traits can only be used if the trait is implemented and in scope
- = note: the following trait defines an item `test`, perhaps you need to implement it:
- candidate #1: `Foo`
error[E0277]: the trait bound `i32: Foo` is not satisfied
--> $DIR/trivial-bounds-leak.rs:25:15
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