rust/tests/ui/needless_return.fixed
2021-01-18 22:33:25 +01:00

129 lines
2.1 KiB
Rust

// run-rustfix
#![allow(unused, clippy::needless_bool)]
#![allow(clippy::if_same_then_else, clippy::single_match)]
#![warn(clippy::needless_return)]
macro_rules! the_answer {
() => {
42
};
}
fn test_end_of_fn() -> bool {
if true {
// no error!
return true;
}
true
}
fn test_no_semicolon() -> bool {
true
}
fn test_if_block() -> bool {
if true {
true
} else {
false
}
}
fn test_match(x: bool) -> bool {
match x {
true => false,
false => {
true
},
}
}
fn test_closure() {
let _ = || {
true
};
let _ = || true;
}
fn test_macro_call() -> i32 {
return the_answer!();
}
fn test_void_fun() {
}
fn test_void_if_fun(b: bool) {
if b {
} else {
}
}
fn test_void_match(x: u32) {
match x {
0 => (),
_ => {},
}
}
fn read_line() -> String {
use std::io::BufRead;
let stdin = ::std::io::stdin();
return stdin.lock().lines().next().unwrap().unwrap();
}
fn borrows_but_not_last(value: bool) -> String {
if value {
use std::io::BufRead;
let stdin = ::std::io::stdin();
let _a = stdin.lock().lines().next().unwrap().unwrap();
String::from("test")
} else {
String::new()
}
}
macro_rules! needed_return {
($e:expr) => {
if $e > 3 {
return;
}
};
}
fn test_return_in_macro() {
// This will return and the macro below won't be executed. Removing the `return` from the macro
// will change semantics.
needed_return!(10);
needed_return!(0);
}
mod issue6501 {
fn foo(bar: Result<(), ()>) {
bar.unwrap_or_else(|_| {})
}
fn test_closure() {
let _ = || {
};
let _ = || {};
}
struct Foo;
#[allow(clippy::unnecessary_lazy_evaluations)]
fn bar(res: Result<Foo, u8>) -> Foo {
res.unwrap_or_else(|_| Foo)
}
}
fn main() {
let _ = test_end_of_fn();
let _ = test_no_semicolon();
let _ = test_if_block();
let _ = test_match(true);
test_closure();
}