mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-11-10 15:14:29 +00:00
109 lines
3.3 KiB
Rust
109 lines
3.3 KiB
Rust
#![warn(clippy::unnecessary_literal_unwrap)]
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#![allow(unreachable_code)]
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#![allow(
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clippy::unnecessary_lazy_evaluations,
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clippy::diverging_sub_expression,
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clippy::let_unit_value,
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clippy::no_effect
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)]
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fn unwrap_option_some() {
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let _val = Some(1).unwrap();
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let _val = Some(1).expect("this never happens");
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Some(1).unwrap();
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Some(1).expect("this never happens");
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}
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#[rustfmt::skip] // force rustfmt not to remove braces in `|| { 234 }`
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fn unwrap_option_none() {
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let _val = None::<()>.unwrap();
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let _val = None::<()>.expect("this always happens");
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let _val: String = None.unwrap_or_default();
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let _val: u16 = None.unwrap_or(234);
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let _val: u16 = None.unwrap_or_else(|| 234);
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let _val: u16 = None.unwrap_or_else(|| { 234 });
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let _val: u16 = None.unwrap_or_else(|| -> u16 { 234 });
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None::<()>.unwrap();
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None::<()>.expect("this always happens");
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None::<String>.unwrap_or_default();
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None::<u16>.unwrap_or(234);
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None::<u16>.unwrap_or_else(|| 234);
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None::<u16>.unwrap_or_else(|| { 234 });
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None::<u16>.unwrap_or_else(|| -> u16 { 234 });
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}
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fn unwrap_result_ok() {
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let _val = Ok::<_, ()>(1).unwrap();
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let _val = Ok::<_, ()>(1).expect("this never happens");
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let _val = Ok::<_, ()>(1).unwrap_err();
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let _val = Ok::<_, ()>(1).expect_err("this always happens");
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Ok::<_, ()>(1).unwrap();
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Ok::<_, ()>(1).expect("this never happens");
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Ok::<_, ()>(1).unwrap_err();
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Ok::<_, ()>(1).expect_err("this always happens");
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}
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fn unwrap_result_err() {
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let _val = Err::<(), _>(1).unwrap_err();
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let _val = Err::<(), _>(1).expect_err("this never happens");
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let _val = Err::<(), _>(1).unwrap();
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let _val = Err::<(), _>(1).expect("this always happens");
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Err::<(), _>(1).unwrap_err();
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Err::<(), _>(1).expect_err("this never happens");
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Err::<(), _>(1).unwrap();
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Err::<(), _>(1).expect("this always happens");
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}
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fn unwrap_methods_option() {
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let _val = Some(1).unwrap_or(2);
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let _val = Some(1).unwrap_or_default();
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let _val = Some(1).unwrap_or_else(|| 2);
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Some(1).unwrap_or(2);
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Some(1).unwrap_or_default();
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Some(1).unwrap_or_else(|| 2);
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}
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fn unwrap_methods_result() {
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let _val = Ok::<_, ()>(1).unwrap_or(2);
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let _val = Ok::<_, ()>(1).unwrap_or_default();
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let _val = Ok::<_, ()>(1).unwrap_or_else(|_| 2);
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Ok::<_, ()>(1).unwrap_or(2);
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Ok::<_, ()>(1).unwrap_or_default();
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Ok::<_, ()>(1).unwrap_or_else(|_| 2);
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}
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fn unwrap_from_binding() {
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macro_rules! from_macro {
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() => {
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Some("")
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};
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}
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let val = from_macro!();
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let _ = val.unwrap_or("");
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}
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fn unwrap_unchecked() {
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let _ = unsafe { Some(1).unwrap_unchecked() };
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let _ = unsafe { Some(1).unwrap_unchecked() + *(&1 as *const i32) }; // needs to keep the unsafe block
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let _ = unsafe { Some(1).unwrap_unchecked() } + 1;
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let _ = unsafe { Ok::<_, ()>(1).unwrap_unchecked() };
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let _ = unsafe { Ok::<_, ()>(1).unwrap_unchecked() + *(&1 as *const i32) };
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let _ = unsafe { Ok::<_, ()>(1).unwrap_unchecked() } + 1;
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let _ = unsafe { Err::<(), i32>(123).unwrap_err_unchecked() };
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}
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fn main() {
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unwrap_option_some();
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unwrap_option_none();
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unwrap_result_ok();
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unwrap_result_err();
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unwrap_methods_option();
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unwrap_methods_result();
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unwrap_unchecked();
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}
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