Addition `manual_map` test for `unsafe` blocks

[rust.git] / tests / ui / cast_lossless_integer.rs

diff --git a/tests/ui/cast_lossless_integer.rs b/tests/ui/cast_lossless_integer.rs
index 61170625c8aa9fd0081f3513d4cbc7c75bb761a8..34bb47181e69deffcf1bfe283ed4557b68d08c4e 100644 (file)
--- a/tests/ui/cast_lossless_integer.rs
+++ b/tests/ui/cast_lossless_integer.rs
@@ -1,25 +1,47 @@
 // run-rustfix
 
-#[warn(clippy::cast_lossless)]
-#[allow(clippy::no_effect, clippy::unnecessary_operation)]
+#![allow(clippy::no_effect, clippy::unnecessary_operation, dead_code)]
+#![warn(clippy::cast_lossless)]
+
 fn main() {
     // Test clippy::cast_lossless with casts to integer types
-    1i8 as i16;
-    1i8 as i32;
-    1i8 as i64;
-    1u8 as i16;
-    1u8 as i32;
-    1u8 as i64;
-    1u8 as u16;
-    1u8 as u32;
-    1u8 as u64;
-    1i16 as i32;
-    1i16 as i64;
-    1u16 as i32;
-    1u16 as i64;
-    1u16 as u32;
-    1u16 as u64;
-    1i32 as i64;
-    1u32 as i64;
-    1u32 as u64;
+    let _ = 1i8 as i16;
+    let _ = 1i8 as i32;
+    let _ = 1i8 as i64;
+    let _ = 1u8 as i16;
+    let _ = 1u8 as i32;
+    let _ = 1u8 as i64;
+    let _ = 1u8 as u16;
+    let _ = 1u8 as u32;
+    let _ = 1u8 as u64;
+    let _ = 1i16 as i32;
+    let _ = 1i16 as i64;
+    let _ = 1u16 as i32;
+    let _ = 1u16 as i64;
+    let _ = 1u16 as u32;
+    let _ = 1u16 as u64;
+    let _ = 1i32 as i64;
+    let _ = 1u32 as i64;
+    let _ = 1u32 as u64;
+
+    // Test with an expression wrapped in parens
+    let _ = (1u8 + 1u8) as u16;
+}
+
+// The lint would suggest using `f64::from(input)` here but the `XX::from` function is not const,
+// so we skip the lint if the expression is in a const fn.
+// See #3656
+const fn abc(input: u16) -> u32 {
+    input as u32
+}
+
+// Same as the above issue. We can't suggest `::from` in const fns in impls
+mod cast_lossless_in_impl {
+    struct A;
+
+    impl A {
+        pub const fn convert(x: u32) -> u64 {
+            x as u64
+        }
+    }
 }