fix: `cast-lossless` should not suggest when casting type is from macro input

1 files changed, 17 insertions, 0 deletions

diff --git a/tests/ui/cast_lossless_integer_unfixable.rs b/tests/ui/cast_lossless_integer_unfixable.rs
new file mode 100644
index 00000000000..db9cbbb5b66
--- /dev/null
+++ b/tests/ui/cast_lossless_integer_unfixable.rs
@@ -0,0 +1,17 @@
+//@check-pass
+#![warn(clippy::cast_lossless)]
+
+fn issue15348() {
+    macro_rules! zero {
+        ($int:ty) => {{
+            let data: [u8; 3] = [0, 0, 0];
+            data[0] as $int
+        }};
+    }
+
+    let _ = zero!(u8);
+    let _ = zero!(u16);
+    let _ = zero!(u32);
+    let _ = zero!(u64);
+    let _ = zero!(u128);
+}