From c8c074288a277df21a52aded322dfa25bc283f64 Mon Sep 17 00:00:00 2001
From: bendn <bend.n@outlook.com>
Date: Mon, 31 Mar 2025 15:50:56 +0700
Subject: Suggest {to,from}_ne_bytes for transmutations between arrays and
 integers, etc

---
 compiler/rustc_mir_transform/src/errors.rs | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

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

diff --git a/compiler/rustc_mir_transform/src/errors.rs b/compiler/rustc_mir_transform/src/errors.rs
index 29698b0c2e4..5b03a4987ed 100644
--- a/compiler/rustc_mir_transform/src/errors.rs
+++ b/compiler/rustc_mir_transform/src/errors.rs
@@ -158,6 +158,26 @@ pub(crate) struct MustNotSuspendReason {
     pub reason: String,
 }
 
+pub(crate) struct UnnecessaryTransmute {
+    pub span: Span,
+    pub sugg: String,
+    pub help: Option<&'static str>,
+}
+
+// Needed for def_path_str
+impl<'a> LintDiagnostic<'a, ()> for UnnecessaryTransmute {
+    fn decorate_lint<'b>(self, diag: &'b mut rustc_errors::Diag<'a, ()>) {
+        diag.primary_message(fluent::mir_transform_unnecessary_transmute);
+        diag.span_suggestion(
+            self.span,
+            "replace this with",
+            self.sugg,
+            lint::Applicability::MachineApplicable,
+        );
+        self.help.map(|help| diag.help(help));
+    }
+}
+
 #[derive(LintDiagnostic)]
 #[diag(mir_transform_undefined_transmute)]
 #[note]
-- 
cgit 1.4.1-3-g733a5