Rollup merge of #120896 - compiler-errors:coro-closure-kind, r=oli-obk

Print kind of coroutine closure

Make sure that we print "async closure" when we have an async closure, rather than calling it generically a ["coroutine-closure"](https://github.com/rust-lang/rust/pull/120361).

Fixes #120886

r? oli-obk

compiler/rustc_middle/src/ty/print/pretty.rs

@@ -877,7 +877,24 @@ pub trait PrettyPrinter<'tcx>: Printer<'tcx> + fmt::Write {
             ty::CoroutineClosure(did, args) => {
                 p!(write("{{"));
                 if !self.should_print_verbose() {
-                    p!(write("coroutine-closure"));
+                    match self.tcx().coroutine_kind(self.tcx().coroutine_for_closure(did)).unwrap()
+                    {
+                        hir::CoroutineKind::Desugared(
+                            hir::CoroutineDesugaring::Async,
+                            hir::CoroutineSource::Closure,
+                        ) => p!("async closure"),
+                        hir::CoroutineKind::Desugared(
+                            hir::CoroutineDesugaring::AsyncGen,
+                            hir::CoroutineSource::Closure,
+                        ) => p!("async gen closure"),
+                        hir::CoroutineKind::Desugared(
+                            hir::CoroutineDesugaring::Gen,
+                            hir::CoroutineSource::Closure,
+                        ) => p!("gen closure"),
+                        _ => unreachable!(
+                            "coroutine from coroutine-closure should have CoroutineSource::Closure"
+                        ),
+                    }
                     // FIXME(eddyb) should use `def_span`.
                     if let Some(did) = did.as_local() {
                         if self.tcx().sess.opts.unstable_opts.span_free_formats {

tests/mir-opt/async_closure_shims.main-{closure#0}-{closure#0}.coroutine_closure_by_move.0.panic-abort.mir

@@ -1,6 +1,6 @@
 // MIR for `main::{closure#0}::{closure#0}` 0 coroutine_closure_by_move
 
-fn main::{closure#0}::{closure#0}(_1: {coroutine-closure@$DIR/async_closure_shims.rs:39:33: 39:52}, _2: i32) -> {async closure body@$DIR/async_closure_shims.rs:39:53: 42:10} {
+fn main::{closure#0}::{closure#0}(_1: {async closure@$DIR/async_closure_shims.rs:39:33: 39:52}, _2: i32) -> {async closure body@$DIR/async_closure_shims.rs:39:53: 42:10} {
     let mut _0: {async closure body@$DIR/async_closure_shims.rs:39:53: 42:10};
 
     bb0: {

tests/mir-opt/async_closure_shims.main-{closure#0}-{closure#0}.coroutine_closure_by_move.0.panic-unwind.mir

@@ -1,6 +1,6 @@
 // MIR for `main::{closure#0}::{closure#0}` 0 coroutine_closure_by_move
 
-fn main::{closure#0}::{closure#0}(_1: {coroutine-closure@$DIR/async_closure_shims.rs:39:33: 39:52}, _2: i32) -> {async closure body@$DIR/async_closure_shims.rs:39:53: 42:10} {
+fn main::{closure#0}::{closure#0}(_1: {async closure@$DIR/async_closure_shims.rs:39:33: 39:52}, _2: i32) -> {async closure body@$DIR/async_closure_shims.rs:39:53: 42:10} {
     let mut _0: {async closure body@$DIR/async_closure_shims.rs:39:53: 42:10};
 
     bb0: {

tests/mir-opt/async_closure_shims.main-{closure#0}-{closure#0}.coroutine_closure_by_mut.0.panic-abort.mir

@@ -1,6 +1,6 @@
 // MIR for `main::{closure#0}::{closure#0}` 0 coroutine_closure_by_mut
 
-fn main::{closure#0}::{closure#0}(_1: &mut {coroutine-closure@$DIR/async_closure_shims.rs:39:33: 39:52}, _2: i32) -> {async closure body@$DIR/async_closure_shims.rs:39:53: 42:10} {
+fn main::{closure#0}::{closure#0}(_1: &mut {async closure@$DIR/async_closure_shims.rs:39:33: 39:52}, _2: i32) -> {async closure body@$DIR/async_closure_shims.rs:39:53: 42:10} {
     debug a => _2;
     debug b => ((*_1).0: i32);
     let mut _0: {async closure body@$DIR/async_closure_shims.rs:39:53: 42:10};

tests/mir-opt/async_closure_shims.main-{closure#0}-{closure#0}.coroutine_closure_by_mut.0.panic-unwind.mir

@@ -1,6 +1,6 @@
 // MIR for `main::{closure#0}::{closure#0}` 0 coroutine_closure_by_mut
 
-fn main::{closure#0}::{closure#0}(_1: &mut {coroutine-closure@$DIR/async_closure_shims.rs:39:33: 39:52}, _2: i32) -> {async closure body@$DIR/async_closure_shims.rs:39:53: 42:10} {
+fn main::{closure#0}::{closure#0}(_1: &mut {async closure@$DIR/async_closure_shims.rs:39:33: 39:52}, _2: i32) -> {async closure body@$DIR/async_closure_shims.rs:39:53: 42:10} {
     debug a => _2;
     debug b => ((*_1).0: i32);
     let mut _0: {async closure body@$DIR/async_closure_shims.rs:39:53: 42:10};

tests/ui/async-await/async-closures/is-not-fn.rs

@@ -5,5 +5,5 @@
 fn main() {
     fn needs_fn(x: impl FnOnce()) {}
     needs_fn(async || {});
-    //~^ ERROR expected `{coroutine-closure@is-not-fn.rs:7:14}` to be a closure that returns `()`
+    //~^ ERROR expected `{async closure@is-not-fn.rs:7:14}` to be a closure that returns `()`
 }

tests/ui/async-await/async-closures/is-not-fn.stderr

@@ -1,4 +1,4 @@
-error[E0271]: expected `{coroutine-closure@is-not-fn.rs:7:14}` to be a closure that returns `()`, but it returns `{async closure body@$DIR/is-not-fn.rs:7:23: 7:25}`
+error[E0271]: expected `{async closure@is-not-fn.rs:7:14}` to be a closure that returns `()`, but it returns `{async closure body@$DIR/is-not-fn.rs:7:23: 7:25}`
   --> $DIR/is-not-fn.rs:7:14
    |
 LL |     needs_fn(async || {});

tests/ui/async-await/async-closures/move-consuming-capture.stderr

@@ -2,7 +2,7 @@ error[E0382]: use of moved value: `x`
   --> $DIR/move-consuming-capture.rs:17:9
    |
 LL |         let x = async move || {
-   |             - move occurs because `x` has type `{coroutine-closure@$DIR/move-consuming-capture.rs:13:17: 13:30}`, which does not implement the `Copy` trait
+   |             - move occurs because `x` has type `{async closure@$DIR/move-consuming-capture.rs:13:17: 13:30}`, which does not implement the `Copy` trait
 ...
 LL |         x().await;
    |         --- `x` moved due to this method call

tests/ui/suggestions/async-fn-ctor-passed-as-arg-where-it-should-have-been-called.stderr

@@ -18,16 +18,16 @@ help: use parentheses to call this function
 LL |     bar(foo());
    |            ++
 
-error[E0277]: `{coroutine-closure@$DIR/async-fn-ctor-passed-as-arg-where-it-should-have-been-called.rs:11:25: 11:33}` is not a future
+error[E0277]: `{async closure@$DIR/async-fn-ctor-passed-as-arg-where-it-should-have-been-called.rs:11:25: 11:33}` is not a future
   --> $DIR/async-fn-ctor-passed-as-arg-where-it-should-have-been-called.rs:12:9
    |
 LL |     bar(async_closure);
-   |     --- ^^^^^^^^^^^^^ `{coroutine-closure@$DIR/async-fn-ctor-passed-as-arg-where-it-should-have-been-called.rs:11:25: 11:33}` is not a future
+   |     --- ^^^^^^^^^^^^^ `{async closure@$DIR/async-fn-ctor-passed-as-arg-where-it-should-have-been-called.rs:11:25: 11:33}` is not a future
    |     |
    |     required by a bound introduced by this call
    |
-   = help: the trait `Future` is not implemented for `{coroutine-closure@$DIR/async-fn-ctor-passed-as-arg-where-it-should-have-been-called.rs:11:25: 11:33}`
+   = help: the trait `Future` is not implemented for `{async closure@$DIR/async-fn-ctor-passed-as-arg-where-it-should-have-been-called.rs:11:25: 11:33}`
-   = note: {coroutine-closure@$DIR/async-fn-ctor-passed-as-arg-where-it-should-have-been-called.rs:11:25: 11:33} must be a future or must implement `IntoFuture` to be awaited
+   = note: {async closure@$DIR/async-fn-ctor-passed-as-arg-where-it-should-have-been-called.rs:11:25: 11:33} must be a future or must implement `IntoFuture` to be awaited
 note: required by a bound in `bar`
   --> $DIR/async-fn-ctor-passed-as-arg-where-it-should-have-been-called.rs:7:16
    |