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https://github.com/rust-lang/rust-clippy
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`must_use_unit` lints unit-returning functions with a `#[must_use]` attribute, suggesting to remove it. `double_must_use` lints functions with a plain `#[must_use]` attribute, but which return a type which is already `#[must_use]`, so the attribute has no benefit. `must_use_candidate` is a pedantic lint that lints functions and methods that return some non-unit type that is not already `#[must_use]` and suggests to add the annotation.
26 lines
398 B
Rust
26 lines
398 B
Rust
//run-rustfix
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// aux-build:macro_rules.rs
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#![warn(clippy::must_use_unit)]
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#![allow(clippy::unused_unit)]
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#[macro_use]
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extern crate macro_rules;
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pub fn must_use_default() {}
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pub fn must_use_unit() -> () {}
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pub fn must_use_with_note() {}
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fn main() {
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must_use_default();
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must_use_unit();
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must_use_with_note();
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// We should not lint in external macros
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must_use_unit!();
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}
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