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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/tools/clippy/tests/ui/cast_lossless_integer.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/tools/clippy/tests/ui/cast_lossless_integer.rs')
-rw-r--r-- | src/tools/clippy/tests/ui/cast_lossless_integer.rs | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/cast_lossless_integer.rs b/src/tools/clippy/tests/ui/cast_lossless_integer.rs new file mode 100644 index 000000000..34bb47181 --- /dev/null +++ b/src/tools/clippy/tests/ui/cast_lossless_integer.rs @@ -0,0 +1,47 @@ +// run-rustfix + +#![allow(clippy::no_effect, clippy::unnecessary_operation, dead_code)] +#![warn(clippy::cast_lossless)] + +fn main() { + // Test clippy::cast_lossless with casts to integer types + 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 + } + } +} |