rust-clippy/tests/ui/or_fun_call.fixed

132 lines
3.1 KiB
Rust

// run-rustfix
#![warn(clippy::or_fun_call)]
#![allow(dead_code)]
use std::collections::BTreeMap;
use std::collections::HashMap;
use std::time::Duration;
/// Checks implementation of the `OR_FUN_CALL` lint.
fn or_fun_call() {
struct Foo;
impl Foo {
fn new() -> Foo {
Foo
}
}
enum Enum {
A(i32),
}
fn make<T>() -> T {
unimplemented!();
}
let with_enum = Some(Enum::A(1));
with_enum.unwrap_or(Enum::A(5));
let with_const_fn = Some(Duration::from_secs(1));
with_const_fn.unwrap_or_else(|| Duration::from_secs(5));
let with_constructor = Some(vec![1]);
with_constructor.unwrap_or_else(make);
let with_new = Some(vec![1]);
with_new.unwrap_or_default();
let with_const_args = Some(vec![1]);
with_const_args.unwrap_or_else(|| Vec::with_capacity(12));
let with_err: Result<_, ()> = Ok(vec![1]);
with_err.unwrap_or_else(|_| make());
let with_err_args: Result<_, ()> = Ok(vec![1]);
with_err_args.unwrap_or_else(|_| Vec::with_capacity(12));
let with_default_trait = Some(1);
with_default_trait.unwrap_or_default();
let with_default_type = Some(1);
with_default_type.unwrap_or_default();
let with_vec = Some(vec![1]);
with_vec.unwrap_or_default();
let without_default = Some(Foo);
without_default.unwrap_or_else(Foo::new);
let stringy = Some(String::from(""));
let _ = stringy.unwrap_or_else(|| "".to_owned());
let opt = Some(1);
let hello = "Hello";
let _ = opt.ok_or(format!("{} world.", hello));
}
struct Foo(u8);
struct Bar(String, Duration);
#[rustfmt::skip]
fn test_or_with_ctors() {
let opt = Some(1);
let opt_opt = Some(Some(1));
// we also test for const promotion, this makes sure we don't hit that
let two = 2;
let _ = opt_opt.unwrap_or(Some(2));
let _ = opt_opt.unwrap_or(Some(two));
let _ = opt.ok_or(Some(2));
let _ = opt.ok_or(Some(two));
let _ = opt.ok_or(Foo(2));
let _ = opt.ok_or(Foo(two));
let _ = opt.or(Some(2));
let _ = opt.or(Some(two));
let _ = Some("a".to_string()).or_else(|| Some("b".to_string()));
let b = "b".to_string();
let _ = Some(Bar("a".to_string(), Duration::from_secs(1)))
.or_else(|| Some(Bar(b, Duration::from_secs(2))));
let vec = vec!["foo"];
let _ = opt.ok_or(vec.len());
let array = ["foo"];
let _ = opt.ok_or(array.len());
let slice = &["foo"][..];
let _ = opt.ok_or(slice.len());
}
// Issue 4514 - early return
fn f() -> Option<()> {
let a = Some(1);
let b = 1i32;
let _ = a.unwrap_or(b.checked_mul(3)?.min(240));
Some(())
}
// Issue 5886 - const fn (with no arguments)
pub fn skip_const_fn_with_no_args() {
const fn foo() -> Option<i32> {
Some(42)
}
let _ = None.or(foo());
// See issue #5693.
let mut map = std::collections::HashMap::new();
map.insert(1, vec![1]);
map.entry(1).or_insert(vec![]);
let mut map = HashMap::<u64, String>::new();
map.entry(42).or_insert(String::new());
let mut btree = BTreeMap::<u64, String>::new();
btree.entry(42).or_insert(String::new());
}
fn main() {}