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54 lines
1.5 KiB
Rust
54 lines
1.5 KiB
Rust
#![deny(clippy::panicking_unwrap, clippy::unnecessary_unwrap)]
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#![allow(clippy::if_same_then_else)]
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macro_rules! m {
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($a:expr) => {
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if $a.is_some() {
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$a.unwrap(); // unnecessary
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}
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};
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}
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fn main() {
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let x = Some(());
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if x.is_some() {
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x.unwrap(); // unnecessary
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} else {
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x.unwrap(); // will panic
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}
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if x.is_none() {
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x.unwrap(); // will panic
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} else {
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x.unwrap(); // unnecessary
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}
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m!(x);
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let mut x: Result<(), ()> = Ok(());
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if x.is_ok() {
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x.unwrap(); // unnecessary
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x.unwrap_err(); // will panic
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} else {
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x.unwrap(); // will panic
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x.unwrap_err(); // unnecessary
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}
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if x.is_err() {
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x.unwrap(); // will panic
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x.unwrap_err(); // unnecessary
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} else {
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x.unwrap(); // unnecessary
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x.unwrap_err(); // will panic
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}
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if x.is_ok() {
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x = Err(());
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x.unwrap(); // not unnecessary because of mutation of x
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// it will always panic but the lint is not smart enough to see this (it only
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// checks if conditions).
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} else {
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x = Ok(());
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x.unwrap_err(); // not unnecessary because of mutation of x
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// it will always panic but the lint is not smart enough to see this (it
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// only checks if conditions).
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}
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assert!(x.is_ok(), "{:?}", x.unwrap_err()); // ok, it's a common test pattern
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}
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