44 lines
1.0 KiB
Rust
44 lines
1.0 KiB
Rust
#![warn(clippy::double_must_use)]
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#![allow(clippy::result_unit_err)]
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#[must_use]
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pub fn must_use_result() -> Result<(), ()> {
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//~^ ERROR: this function has an empty `#[must_use]` attribute, but returns a type already
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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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//~^ ERROR: this function has an empty `#[must_use]` attribute, but returns a type already
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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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//~^ ERROR: this function has an empty `#[must_use]` attribute, but returns a type already
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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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// vvvv Should not lint (#10486)
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#[must_use]
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async fn async_must_use() -> usize {
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unimplemented!();
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}
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#[must_use]
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async fn async_must_use_result() -> Result<(), ()> {
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//~^ ERROR: this function has an empty `#[must_use]` attribute, but returns a type already
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Ok(())
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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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