Rollup merge of #99748 - compiler-errors:better-impl-trait-printing, r=fee1-dead

Use full type name instead of just saying `impl Trait` in "captures lifetime" error

I think this is very useful, especially when there's >1 `impl Trait`, and it just means passing around a bit more info that we already have access to.

src/test/ui/async-await/multiple-lifetimes/ret-impl-trait-one.stderr

@@ -13,7 +13,7 @@ LL | | }
    |
    = help: consider adding the following bound: `'a: 'b`
 
-error[E0700]: hidden type for `impl Trait` captures lifetime that does not appear in bounds
+error[E0700]: hidden type for `impl Trait<'a>` captures lifetime that does not appear in bounds
   --> $DIR/ret-impl-trait-one.rs:16:80
    |
 LL |   async fn async_ret_impl_trait1<'a, 'b>(a: &'a u8, b: &'b u8) -> impl Trait<'a> {

src/test/ui/impl-trait/hidden-lifetimes.stderr

@@ -1,4 +1,4 @@
-error[E0700]: hidden type for `impl Trait` captures lifetime that does not appear in bounds
+error[E0700]: hidden type for `impl Swap` captures lifetime that does not appear in bounds
   --> $DIR/hidden-lifetimes.rs:29:5
    |
 LL | fn hide_ref<'a, 'b, T: 'static>(x: &'a mut &'b T) -> impl Swap + 'a {
@@ -11,7 +11,7 @@ help: to declare that the `impl Trait` captures `'b`, you can add an explicit `'
 LL | fn hide_ref<'a, 'b, T: 'static>(x: &'a mut &'b T) -> impl Swap + 'a + 'b {
    |                                                                     ++++
 
-error[E0700]: hidden type for `impl Trait` captures lifetime that does not appear in bounds
+error[E0700]: hidden type for `impl Swap` captures lifetime that does not appear in bounds
   --> $DIR/hidden-lifetimes.rs:46:5
    |
 LL | fn hide_rc_refcell<'a, 'b: 'a, T: 'static>(x: Rc<RefCell<&'b T>>) -> impl Swap + 'a {

src/test/ui/impl-trait/multiple-lifetimes/error-handling-2.rs

@@ -20,7 +20,7 @@ fn foo<'a: 'b, 'b, 'c>(x: &'static i32, mut y: &'a i32) -> E<'b, 'c> {
         let _: &'b i32 = *u.0;
     }
     u.0
-    //~^ ERROR hidden type for `impl Trait` captures lifetime that does not appear in bounds
+    //~^ ERROR hidden type for `E<'b, 'c>` captures lifetime that does not appear in bounds
 }
 
 fn main() {}

src/test/ui/impl-trait/multiple-lifetimes/error-handling-2.stderr

@@ -1,4 +1,4 @@
-error[E0700]: hidden type for `impl Trait` captures lifetime that does not appear in bounds
+error[E0700]: hidden type for `E<'b, 'c>` captures lifetime that does not appear in bounds
   --> $DIR/error-handling-2.rs:22:5
    |
 LL | fn foo<'a: 'b, 'b, 'c>(x: &'static i32, mut y: &'a i32) -> E<'b, 'c> {

src/test/ui/impl-trait/multiple-lifetimes/ordinary-bounds-unrelated.rs

@@ -26,7 +26,7 @@ where
     // 'a in ['d, 'e]
     // ```
     if condition() { a } else { b }
-    //~^ ERROR hidden type for `impl Trait` captures lifetime that does not appear in bounds
+    //~^ ERROR hidden type for `impl Trait<'d, 'e>` captures lifetime that does not appear in bounds
 }
 
 fn condition() -> bool {

src/test/ui/impl-trait/multiple-lifetimes/ordinary-bounds-unrelated.stderr

@@ -1,4 +1,4 @@
-error[E0700]: hidden type for `impl Trait` captures lifetime that does not appear in bounds
+error[E0700]: hidden type for `impl Trait<'d, 'e>` captures lifetime that does not appear in bounds
   --> $DIR/ordinary-bounds-unrelated.rs:28:33
    |
 LL | fn upper_bounds<'a, 'b, 'c, 'd, 'e>(a: Ordinary<'a>, b: Ordinary<'b>) -> impl Trait<'d, 'e>

src/test/ui/impl-trait/multiple-lifetimes/ordinary-bounds-unsuited.rs

@@ -29,7 +29,7 @@ fn upper_bounds<'a, 'b>(a: Ordinary<'a>, b: Ordinary<'b>) -> impl Trait<'a, 'b>
     //
     // We are forced to pick that '0 = 'e, because only 'e is outlived by *both* 'a and 'b.
     if condition() { a } else { b }
-    //~^ ERROR hidden type for `impl Trait` captures lifetime that does not appear in bounds
+    //~^ ERROR hidden type for `impl Trait<'a, 'b>` captures lifetime that does not appear in bounds
 }
 
 fn condition() -> bool {

src/test/ui/impl-trait/multiple-lifetimes/ordinary-bounds-unsuited.stderr

@@ -1,4 +1,4 @@
-error[E0700]: hidden type for `impl Trait` captures lifetime that does not appear in bounds
+error[E0700]: hidden type for `impl Trait<'a, 'b>` captures lifetime that does not appear in bounds
   --> $DIR/ordinary-bounds-unsuited.rs:31:33
    |
 LL | fn upper_bounds<'a, 'b>(a: Ordinary<'a>, b: Ordinary<'b>) -> impl Trait<'a, 'b>

src/test/ui/impl-trait/must_outlive_least_region_or_bound.stderr

@@ -1,4 +1,4 @@
-error[E0700]: hidden type for `impl Trait` captures lifetime that does not appear in bounds
+error[E0700]: hidden type for `impl Copy` captures lifetime that does not appear in bounds
   --> $DIR/must_outlive_least_region_or_bound.rs:3:35
    |
 LL | fn elided(x: &i32) -> impl Copy { x }
@@ -11,7 +11,7 @@ help: to declare that the `impl Trait` captures `'_`, you can add an explicit `'
 LL | fn elided(x: &i32) -> impl Copy + '_ { x }
    |                                 ++++
 
-error[E0700]: hidden type for `impl Trait` captures lifetime that does not appear in bounds
+error[E0700]: hidden type for `impl Copy` captures lifetime that does not appear in bounds
   --> $DIR/must_outlive_least_region_or_bound.rs:6:44
    |
 LL | fn explicit<'a>(x: &'a i32) -> impl Copy { x }
@@ -96,7 +96,7 @@ help: alternatively, add an explicit `'static` bound to this reference
 LL | fn with_bound<'a>(x: &'static i32) -> impl LifetimeTrait<'a> + 'static { x }
    |                      ~~~~~~~~~~~~
 
-error[E0700]: hidden type for `impl Trait` captures lifetime that does not appear in bounds
+error[E0700]: hidden type for `impl Fn(&'a u32)` captures lifetime that does not appear in bounds
   --> $DIR/must_outlive_least_region_or_bound.rs:38:5
    |
 LL | fn move_lifetime_into_fn<'a, 'b>(x: &'a u32, y: &'b u32) -> impl Fn(&'a u32) {

src/test/ui/impl-trait/region-escape-via-bound.rs

@@ -15,7 +15,7 @@ fn foo<'x, 'y>(x: Cell<&'x u32>) -> impl Trait<'y>
 where 'x: 'y
 {
     x
-    //~^ ERROR hidden type for `impl Trait` captures lifetime that does not appear in bounds [E0700]
+    //~^ ERROR hidden type for `impl Trait<'y>` captures lifetime that does not appear in bounds [E0700]
 }
 
 fn main() { }

src/test/ui/impl-trait/region-escape-via-bound.stderr

@@ -1,4 +1,4 @@
-error[E0700]: hidden type for `impl Trait` captures lifetime that does not appear in bounds
+error[E0700]: hidden type for `impl Trait<'y>` captures lifetime that does not appear in bounds
   --> $DIR/region-escape-via-bound.rs:17:5
    |
 LL | fn foo<'x, 'y>(x: Cell<&'x u32>) -> impl Trait<'y>

src/test/ui/impl-trait/static-return-lifetime-infered.stderr

@@ -1,4 +1,4 @@
-error[E0700]: hidden type for `impl Trait` captures lifetime that does not appear in bounds
+error[E0700]: hidden type for `impl Iterator<Item = u32>` captures lifetime that does not appear in bounds
   --> $DIR/static-return-lifetime-infered.rs:7:9
    |
 LL |     fn iter_values_anon(&self) -> impl Iterator<Item=u32> {
@@ -11,7 +11,7 @@ help: to declare that the `impl Trait` captures `'_`, you can add an explicit `'
 LL |     fn iter_values_anon(&self) -> impl Iterator<Item=u32> + '_ {
    |                                                           ++++
 
-error[E0700]: hidden type for `impl Trait` captures lifetime that does not appear in bounds
+error[E0700]: hidden type for `impl Iterator<Item = u32>` captures lifetime that does not appear in bounds
   --> $DIR/static-return-lifetime-infered.rs:7:9
    |
 LL |     fn iter_values_anon(&self) -> impl Iterator<Item=u32> {
@@ -24,7 +24,7 @@ help: to declare that the `impl Trait` captures `'_`, you can add an explicit `'
 LL |     fn iter_values_anon(&self) -> impl Iterator<Item=u32> + '_ {
    |                                                           ++++
 
-error[E0700]: hidden type for `impl Trait` captures lifetime that does not appear in bounds
+error[E0700]: hidden type for `impl Iterator<Item = u32>` captures lifetime that does not appear in bounds
   --> $DIR/static-return-lifetime-infered.rs:12:9
    |
 LL |     fn iter_values<'a>(&'a self) -> impl Iterator<Item=u32> {
@@ -37,7 +37,7 @@ help: to declare that the `impl Trait` captures `'a`, you can add an explicit `'
 LL |     fn iter_values<'a>(&'a self) -> impl Iterator<Item=u32> + 'a {
    |                                                             ++++
 
-error[E0700]: hidden type for `impl Trait` captures lifetime that does not appear in bounds
+error[E0700]: hidden type for `impl Iterator<Item = u32>` captures lifetime that does not appear in bounds
   --> $DIR/static-return-lifetime-infered.rs:12:9
    |
 LL |     fn iter_values<'a>(&'a self) -> impl Iterator<Item=u32> {

src/test/ui/nll/issue-73159-rpit-static.stderr

@@ -1,4 +1,4 @@
-error[E0700]: hidden type for `impl Trait` captures lifetime that does not appear in bounds
+error[E0700]: hidden type for `impl Iterator<Item = u8>` captures lifetime that does not appear in bounds
   --> $DIR/issue-73159-rpit-static.rs:8:9
    |
 LL | impl<'a> Foo<'a> {

src/test/ui/nll/ty-outlives/impl-trait-captures.stderr

@@ -1,4 +1,4 @@
-error[E0700]: hidden type for `impl Trait` captures lifetime that does not appear in bounds
+error[E0700]: hidden type for `Opaque(DefId(0:11 ~ impl_trait_captures[1afc]::foo::{opaque#0}), [ReStatic, T, ReEarlyBound(0, 'a)])` captures lifetime that does not appear in bounds
   --> $DIR/impl-trait-captures.rs:11:5
    |
 LL | fn foo<'a, T>(x: &T) -> impl Foo<'a> {

src/test/ui/self/arbitrary_self_types_pin_lifetime_impl_trait-async.stderr

@@ -1,4 +1,4 @@
-error[E0700]: hidden type for `impl Trait` captures lifetime that does not appear in bounds
+error[E0700]: hidden type for `impl Clone` captures lifetime that does not appear in bounds
   --> $DIR/arbitrary_self_types_pin_lifetime_impl_trait-async.rs:8:48
    |
 LL |     async fn f(self: Pin<&Self>) -> impl Clone { self }

src/test/ui/self/arbitrary_self_types_pin_lifetime_impl_trait.stderr

@@ -1,4 +1,4 @@
-error[E0700]: hidden type for `impl Trait` captures lifetime that does not appear in bounds
+error[E0700]: hidden type for `impl Clone` captures lifetime that does not appear in bounds
   --> $DIR/arbitrary_self_types_pin_lifetime_impl_trait.rs:6:44
    |
 LL |     fn f(self: Pin<&Self>) -> impl Clone { self }

src/test/ui/suggestions/lifetimes/missing-lifetimes-in-signature.rs

@@ -17,7 +17,7 @@ where
     G: Get<T>,
 {
     move || {
-        //~^ ERROR hidden type for `impl Trait` captures lifetime
+        //~^ ERROR hidden type for `impl FnOnce()` captures lifetime
         *dest = g.get();
     }
 }

src/test/ui/suggestions/lifetimes/missing-lifetimes-in-signature.stderr

@@ -6,7 +6,7 @@ LL | fn baz<G: 'a, T>(g: G, dest: &mut T) -> impl FnOnce() + '_
    |        |
    |        help: consider introducing lifetime `'a` here: `'a,`
 
-error[E0700]: hidden type for `impl Trait` captures lifetime that does not appear in bounds
+error[E0700]: hidden type for `impl FnOnce()` captures lifetime that does not appear in bounds
   --> $DIR/missing-lifetimes-in-signature.rs:19:5
    |
 LL |   fn foo<G, T>(g: G, dest: &mut T) -> impl FnOnce()