Update upstream source from tag 'upstream/1.52.1+dfsg1'

[rustc.git] / src / tools / clippy / tests / ui / unnecessary_cast.rs

diff --git a/src/tools/clippy/tests/ui/unnecessary_cast.rs b/src/tools/clippy/tests/ui/unnecessary_cast.rs
new file mode 100644 (file)
index 0000000..e8f2fb4
--- /dev/null
+++ b/src/tools/clippy/tests/ui/unnecessary_cast.rs
@@ -0,0 +1,26 @@
+#![warn(clippy::unnecessary_cast)]
+#![allow(clippy::no_effect)]
+
+fn main() {
+    // Test cast_unnecessary
+    1i32 as i32;
+    1f32 as f32;
+    false as bool;
+    &1i32 as &i32;
+
+    // macro version
+    macro_rules! foo {
+        ($a:ident, $b:ident) => {
+            #[allow(unused)]
+            pub fn $a() -> $b {
+                1 as $b
+            }
+        };
+    }
+    foo!(a, i32);
+    foo!(b, f32);
+    foo!(c, f64);
+
+    // do not lint cast to cfg-dependant type
+    1 as std::os::raw::c_char;
+}