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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 02:49:50 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-18 02:49:50 +0000 |
commit | 9835e2ae736235810b4ea1c162ca5e65c547e770 (patch) | |
tree | 3fcebf40ed70e581d776a8a4c65923e8ec20e026 /src/tools/clippy/tests/ui/manual_slice_size_calculation.fixed | |
parent | Releasing progress-linux version 1.70.0+dfsg2-1~progress7.99u1. (diff) | |
download | rustc-9835e2ae736235810b4ea1c162ca5e65c547e770.tar.xz rustc-9835e2ae736235810b4ea1c162ca5e65c547e770.zip |
Merging upstream version 1.71.1+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/tools/clippy/tests/ui/manual_slice_size_calculation.fixed')
-rw-r--r-- | src/tools/clippy/tests/ui/manual_slice_size_calculation.fixed | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/manual_slice_size_calculation.fixed b/src/tools/clippy/tests/ui/manual_slice_size_calculation.fixed new file mode 100644 index 000000000..ac85bd8d3 --- /dev/null +++ b/src/tools/clippy/tests/ui/manual_slice_size_calculation.fixed @@ -0,0 +1,46 @@ +//@run-rustfix +//@aux-build:proc_macros.rs +#![allow(unused)] +#![warn(clippy::manual_slice_size_calculation)] + +extern crate proc_macros; + +use core::mem::{align_of, size_of}; +use proc_macros::external; + +fn main() { + let v_i32 = Vec::<i32>::new(); + let s_i32 = v_i32.as_slice(); + + // True positives: + let _ = std::mem::size_of_val(s_i32); // WARNING + let _ = std::mem::size_of_val(s_i32); // WARNING + let _ = std::mem::size_of_val(s_i32) * 5; // WARNING + + let len = s_i32.len(); + let size = size_of::<i32>(); + let _ = std::mem::size_of_val(s_i32); // WARNING + let _ = std::mem::size_of_val(s_i32); // WARNING + let _ = std::mem::size_of_val(s_i32); // WARNING + + let _ = std::mem::size_of_val(external!(&[1u64][..])); + + // True negatives: + let _ = size_of::<i32>() + s_i32.len(); // Ok, not a multiplication + let _ = size_of::<i32>() * s_i32.partition_point(|_| true); // Ok, not len() + let _ = size_of::<i32>() * v_i32.len(); // Ok, not a slice + let _ = align_of::<i32>() * s_i32.len(); // Ok, not size_of() + let _ = size_of::<u32>() * s_i32.len(); // Ok, different types + + let _ = external!($s_i32.len() * size_of::<i32>()); + let _ = external!($s_i32.len()) * size_of::<i32>(); + + // False negatives: + let _ = 5 * size_of::<i32>() * s_i32.len(); // Ok (MISSED OPPORTUNITY) + let _ = size_of::<i32>() * 5 * s_i32.len(); // Ok (MISSED OPPORTUNITY) +} + +const fn _const(s_i32: &[i32]) { + // True negative: + let _ = s_i32.len() * size_of::<i32>(); // Ok, can't use size_of_val in const +} |