Addition `manual_map` test for `unsafe` blocks

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

diff --git a/tests/ui/cast_lossless_integer.fixed b/tests/ui/cast_lossless_integer.fixed
index 83f3e02420999bb70e7f73866e26003378f42f36..72a708b40737b3932688127ec9b1905901bacb86 100644 (file)
--- a/tests/ui/cast_lossless_integer.fixed
+++ b/tests/ui/cast_lossless_integer.fixed
@@ -1,34 +1,47 @@
-// Copyright 2014-2018 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-
 // 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
-    i16::from(1i8);
-    i32::from(1i8);
-    i64::from(1i8);
-    i16::from(1u8);
-    i32::from(1u8);
-    i64::from(1u8);
-    u16::from(1u8);
-    u32::from(1u8);
-    u64::from(1u8);
-    i32::from(1i16);
-    i64::from(1i16);
-    i32::from(1u16);
-    i64::from(1u16);
-    u32::from(1u16);
-    u64::from(1u16);
-    i64::from(1i32);
-    i64::from(1u32);
-    u64::from(1u32);
+    let _ = i16::from(1i8);
+    let _ = i32::from(1i8);
+    let _ = i64::from(1i8);
+    let _ = i16::from(1u8);
+    let _ = i32::from(1u8);
+    let _ = i64::from(1u8);
+    let _ = u16::from(1u8);
+    let _ = u32::from(1u8);
+    let _ = u64::from(1u8);
+    let _ = i32::from(1i16);
+    let _ = i64::from(1i16);
+    let _ = i32::from(1u16);
+    let _ = i64::from(1u16);
+    let _ = u32::from(1u16);
+    let _ = u64::from(1u16);
+    let _ = i64::from(1i32);
+    let _ = i64::from(1u32);
+    let _ = u64::from(1u32);
+
+    // Test with an expression wrapped in parens
+    let _ = u16::from(1u8 + 1u8);
+}
+
+// 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
+        }
+    }
 }