From cd283d9dc62346cb0538e35de9adfd2185e39772 Mon Sep 17 00:00:00 2001
From: "Samuel E. Moelius III" <samuel.moelius@trailofbits.com>
Date: Mon, 24 Jul 2023 19:44:05 -0400
Subject: [PATCH] Ensure generated expressions parse as block expressions

---
 cast_checks/tests/basic.rs | 6 ++++++
 macro/src/lib.rs           | 4 ++--
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/cast_checks/tests/basic.rs b/cast_checks/tests/basic.rs
index cb32980..a036605 100644
--- a/cast_checks/tests/basic.rs
+++ b/cast_checks/tests/basic.rs
@@ -68,3 +68,9 @@ fn checked_float() {
 fn inferred_type(x: f64) -> i32 {
     x as _
 }
+
+#[allow(dead_code, clippy::cast_lossless)]
+#[cast_checks::enable]
+fn block_expression(x: u32) -> f64 {
+    x as f64 / 2.0
+}
diff --git a/macro/src/lib.rs b/macro/src/lib.rs
index d396950..3f34751 100644
--- a/macro/src/lib.rs
+++ b/macro/src/lib.rs
@@ -86,7 +86,7 @@ impl VisitMut for Visitor {
         let msg = { String::from("invalid cast") };
 
         *expr = parse_quote_spanned! { expr.span() =>
-            {
+            ({
                 #[allow(unused_imports)]
                 use cast_checks::MaybeTryIntoFallback;
 
@@ -95,7 +95,7 @@ impl VisitMut for Visitor {
                 } else {
                     #operand as #ty
                 }
-            }
+            })
         };
     }
 }