Clippy lints / Correctness
Clippy lint · Correctness · checked with Clippy 0.1.99
clippy::vec_resize_to_zero: Finds occurrences of Vec::resize(0, an_int)
What it meansFinds occurrences of Vec::resize(0, an_int) It is in the correctness group and denied by default (the build fails).
Does it matter?
This is probably an argument inversion mistake.
Code that is almost certainly wrong. Denied by default: the build fails until you fix it or allow it.
How to fix it
Clippy does not fix this one automatically (its suggestion may change behaviour, so it only shows it). Change the code by hand:
Flagged
vec![1, 2, 3, 4, 5].resize(0, 5)
Write this instead
vec![1, 2, 3, 4, 5].clear()
Turn it off, or on
Allow it where it does not fit your code, as narrowly as you can:
On one item
#[allow(clippy::vec_resize_to_zero)]
fn my_function() { /* ... */ }Whole crate (Cargo.toml)
[lints.clippy]
vec_resize_to_zero = "allow"One run
cargo clippy -- -A clippy::vec-resize-to-zeroThe [lints] table needs Rust 1.74 or newer. In a workspace, put it under [workspace.lints.clippy] and add [lints] workspace = true to each member.
Clippy's own documentation
What it does
Finds occurrences of Vec::resize(0, an_int)
Why is this bad?
This is probably an argument inversion mistake.
Example
vec![1, 2, 3, 4, 5].resize(0, 5)
Use instead:
vec![1, 2, 3, 4, 5].clear()
From the Clippy lint list (0.1.99), part of the Rust project, MIT or Apache-2.0. Official entry.
Related lints
- unsound_collection_transmutetransmute from `std::vec::Vec<u16>` to `std::vec::Vec<u32>` with mismatched layout is unsound
- unused_io_amountwritten amount is not handled
- useless_attributeChecks for extern crate and use items annotated with lint attributes. This lint permits lint attributes for lints emitted on the items themself. For use items these lints are: ambiguous_glob_reexports dead_code deprecated hidden_glob_reexports unreachable_pub unused unused_braces unused_import_braces clippy::disallowed_types clippy::enum_glob_use clippy::macro_use_imports clippy::module_name_repetitions clippy::redundant_pub_crate clippy::single_component_path_imports clippy::unsafe_removed_from_name clippy::wildcard_imports For extern crate items these lints are: unused_imports on items with #[macro_use]
- while_immutable_conditionvariables in the condition are not mutated in the loop body
- wrong_transmuteChecks for transmutes that can’t ever be correct on any architecture
- zst_offsetoffset calculation on zero-sized value
All 847 Clippy lints · Rust compiler errors · Cargo.toml checker
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Related lintclippy::unsound_collection_transmutetransmute from `std::vec::Vec<u16>` to `std::vec::Vec<u32>` with mismatched layout is unsoundRead it next →Did this answer your question?