From 2af92bbf2ec353cd5eafb3bd5cb1ea5c1de448d3 Mon Sep 17 00:00:00 2001
From: Obei Sideg <obei.sideg@gmail.com>
Date: Wed, 3 Aug 2022 18:43:29 +0300
Subject: Suggest removing `let` if `const let` is used

---
 compiler/rustc_parse/src/parser/item.rs | 10 ++++++++++
 1 file changed, 10 insertions(+)

(limited to 'compiler/rustc_parse/src')

diff --git a/compiler/rustc_parse/src/parser/item.rs b/compiler/rustc_parse/src/parser/item.rs
index 2c1e5807aa7..1d92213be34 100644
--- a/compiler/rustc_parse/src/parser/item.rs
+++ b/compiler/rustc_parse/src/parser/item.rs
@@ -1124,6 +1124,16 @@ impl<'a> Parser<'a> {
                     Applicability::MaybeIncorrect,
                 )
                 .emit();
+        } else if self.eat_keyword(kw::Let) {
+            let span = self.prev_token.span;
+            self.struct_span_err(const_span.to(span), "`const` and `let` are mutually exclusive")
+                .span_suggestion(
+                    const_span.to(span),
+                    "remove `let`",
+                    "const",
+                    Applicability::MaybeIncorrect,
+                )
+                .emit();
         }
     }
 
-- 
cgit 1.4.1-3-g733a5