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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.
27 lines
474 B
Rust
27 lines
474 B
Rust
#![warn(clippy::double_must_use)]
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#[must_use]
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pub fn must_use_result() -> Result<(), ()> {
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unimplemented!();
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}
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#[must_use]
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pub fn must_use_tuple() -> (Result<(), ()>, u8) {
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unimplemented!();
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}
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#[must_use]
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pub fn must_use_array() -> [Result<(), ()>; 1] {
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unimplemented!();
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}
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#[must_use = "With note"]
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pub fn must_use_with_note() -> Result<(), ()> {
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unimplemented!();
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}
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fn main() {
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must_use_result();
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must_use_tuple();
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must_use_with_note();
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}
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