diff options
Diffstat (limited to '')
-rw-r--r-- | src/tools/clippy/tests/ui/fn_to_numeric_cast_32bit.rs | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/fn_to_numeric_cast_32bit.rs b/src/tools/clippy/tests/ui/fn_to_numeric_cast_32bit.rs new file mode 100644 index 000000000..04ee985c0 --- /dev/null +++ b/src/tools/clippy/tests/ui/fn_to_numeric_cast_32bit.rs @@ -0,0 +1,55 @@ +// ignore-64bit + +#![warn(clippy::fn_to_numeric_cast, clippy::fn_to_numeric_cast_with_truncation)] + +fn foo() -> String { + String::new() +} + +fn test_function_to_numeric_cast() { + let _ = foo as i8; + let _ = foo as i16; + let _ = foo as i32; + let _ = foo as i64; + let _ = foo as i128; + let _ = foo as isize; + + let _ = foo as u8; + let _ = foo as u16; + let _ = foo as u32; + let _ = foo as u64; + let _ = foo as u128; + + // Casting to usize is OK and should not warn + let _ = foo as usize; + + // Cast `f` (a `FnDef`) to `fn()` should not warn + fn f() {} + let _ = f as fn(); +} + +fn test_function_var_to_numeric_cast() { + let abc: fn() -> String = foo; + + let _ = abc as i8; + let _ = abc as i16; + let _ = abc as i32; + let _ = abc as i64; + let _ = abc as i128; + let _ = abc as isize; + + let _ = abc as u8; + let _ = abc as u16; + let _ = abc as u32; + let _ = abc as u64; + let _ = abc as u128; + + // Casting to usize is OK and should not warn + let _ = abc as usize; +} + +fn fn_with_fn_args(f: fn(i32) -> i32) -> i32 { + f as i32 +} + +fn main() {} |