Put initializer checks into closures to avoid stack allocations in de…

…bug builds
Rust-for-Linux · May 5, 2023 · 1f506ed · 1f506ed
1 parent e794dbb
commit 1f506ed
Showing 1 changed file with 17 additions and 13 deletions.
diff --git a/src/lib.rs b/src/lib.rs
@@ -775,14 +775,16 @@ macro_rules! try_pin_init {
                     // We use unreachable code to ensure that all fields have been mentioned exactly
                     // once, this struct initializer will still be type-checked and complain with a
                     // very natural error message if a field is forgotten/mentioned more than once.
-                    #[allow(unreachable_code, clippy::diverging_sub_expression)]
+                    #[allow(unreachable_code, clippy::diverging_sub_expression, unused_must_use)]
                     if false {
-                        $crate::try_pin_init!(make_initializer:
-                            @slot(slot),
-                            @type_name($t),
-                            @munch_fields($($fields)*,),
-                            @acc(),
-                        );
+                        (|| {
+                            $crate::try_pin_init!(make_initializer:
+                                @slot(slot),
+                                @type_name($t),
+                                @munch_fields($($fields)*,),
+                                @acc(),
+                            );
+                        })();
                     }
                 }
                 Ok(__InitOk)
@@ -1129,12 +1131,14 @@ macro_rules! try_init {
                     // very natural error message if a field is forgotten/mentioned more than once.
                     #[allow(unreachable_code, clippy::diverging_sub_expression)]
                     if false {
-                        $crate::try_init!(make_initializer:
-                            @slot(slot),
-                            @type_name($t),
-                            @munch_fields($($fields)*,),
-                            @acc(),
-                        );
+                        (|| {
+                            $crate::try_init!(make_initializer:
+                                @slot(slot),
+                                @type_name($t),
+                                @munch_fields($($fields)*,),
+                                @acc(),
+                            );
+                        })();
                     }
                 }
                 Ok(__InitOk)