// run-rustfix #![warn(clippy::expect_fun_call)] /// Checks implementation of the `EXPECT_FUN_CALL` lint fn main() { struct Foo; impl Foo { fn new() -> Self { Foo } fn expect(&self, msg: &str) { panic!("{}", msg) } } let with_some = Some("value"); with_some.expect("error"); let with_none: Option<i32> = None; with_none.expect("error"); let error_code = 123_i32; let with_none_and_format: Option<i32> = None; with_none_and_format.unwrap_or_else(|| panic!("Error {}: fake error", error_code)); let with_none_and_as_str: Option<i32> = None; with_none_and_as_str.unwrap_or_else(|| panic!("Error {}: fake error", error_code)); let with_ok: Result<(), ()> = Ok(()); with_ok.expect("error"); let with_err: Result<(), ()> = Err(()); with_err.expect("error"); let error_code = 123_i32; let with_err_and_format: Result<(), ()> = Err(()); with_err_and_format.unwrap_or_else(|_| panic!("Error {}: fake error", error_code)); let with_err_and_as_str: Result<(), ()> = Err(()); with_err_and_as_str.unwrap_or_else(|_| panic!("Error {}: fake error", error_code)); let with_dummy_type = Foo::new(); with_dummy_type.expect("another test string"); let with_dummy_type_and_format = Foo::new(); with_dummy_type_and_format.expect(&format!("Error {}: fake error", error_code)); let with_dummy_type_and_as_str = Foo::new(); with_dummy_type_and_as_str.expect(format!("Error {}: fake error", error_code).as_str()); //Issue #2937 Some("foo").unwrap_or_else(|| panic!("{} {}", 1, 2)); //Issue #2979 - this should not lint { let msg = "bar"; Some("foo").expect(msg); } { fn get_string() -> String { "foo".to_string() } fn get_static_str() -> &'static str { "foo" } fn get_non_static_str(_: &u32) -> &str { "foo" } Some("foo").unwrap_or_else(|| { panic!(get_string()) }); Some("foo").unwrap_or_else(|| { panic!(get_string()) }); Some("foo").unwrap_or_else(|| { panic!(get_string()) }); Some("foo").unwrap_or_else(|| { panic!(get_static_str()) }); Some("foo").unwrap_or_else(|| { panic!(get_non_static_str(&0).to_string()) }); } //Issue #3839 Some(true).unwrap_or_else(|| panic!("key {}, {}", 1, 2)); //Issue #4912 - the receiver is a &Option { let opt = Some(1); let opt_ref = &opt; opt_ref.unwrap_or_else(|| panic!("{:?}", opt_ref)); } }