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