From aef0f4024aec24fd7e53dbc51883457e44fe17ce Mon Sep 17 00:00:00 2001
From: Oli Scherer <git-spam-no-reply9815368754983@oli-obk.de>
Date: Thu, 11 Apr 2024 13:15:34 +0000
Subject: Error on using `yield` without also using `#[coroutine]` on the
 closure

And suggest adding the `#[coroutine]` to the closure
---
 compiler/rustc_ast_lowering/src/errors.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'compiler/rustc_ast_lowering/src/errors.rs')

diff --git a/compiler/rustc_ast_lowering/src/errors.rs b/compiler/rustc_ast_lowering/src/errors.rs
index 6799513a323..6f70e135c72 100644
--- a/compiler/rustc_ast_lowering/src/errors.rs
+++ b/compiler/rustc_ast_lowering/src/errors.rs
@@ -421,3 +421,12 @@ pub(crate) struct NoPreciseCapturesOnApit {
     #[primary_span]
     pub span: Span,
 }
+
+#[derive(Diagnostic)]
+#[diag(ast_lowering_yield_in_closure)]
+pub(crate) struct YieldInClosure {
+    #[primary_span]
+    pub span: Span,
+    #[suggestion(code = "#[coroutine] ", applicability = "maybe-incorrect", style = "verbose")]
+    pub suggestion: Option<Span>,
+}
-- 
cgit 1.4.1-3-g733a5