rust/tests/ui/eta.rs
2019-01-08 21:46:39 +01:00

64 lines
1.3 KiB
Rust

#![allow(
unused,
clippy::no_effect,
clippy::redundant_closure_call,
clippy::many_single_char_names,
clippy::needless_pass_by_value,
clippy::option_map_unit_fn,
clippy::trivially_copy_pass_by_ref
)]
#![warn(clippy::redundant_closure, clippy::needless_borrow)]
fn main() {
let a = Some(1u8).map(|a| foo(a));
meta(|a| foo(a));
let c = Some(1u8).map(|a| {1+2; foo}(a));
let d = Some(1u8).map(|a| foo((|b| foo2(b))(a))); //is adjusted?
all(&[1, 2, 3], &&2, |x, y| below(x, y)); //is adjusted
unsafe {
Some(1u8).map(|a| unsafe_fn(a)); // unsafe fn
}
// See #815
let e = Some(1u8).map(|a| divergent(a));
let e = Some(1u8).map(|a| generic(a));
let e = Some(1u8).map(generic);
// See #515
let a: Option<Box<::std::ops::Deref<Target = [i32]>>> =
Some(vec![1i32, 2]).map(|v| -> Box<::std::ops::Deref<Target = [i32]>> { Box::new(v) });
}
fn meta<F>(f: F)
where
F: Fn(u8),
{
f(1u8)
}
fn foo(_: u8) {}
fn foo2(_: u8) -> u8 {
1u8
}
fn all<X, F>(x: &[X], y: &X, f: F) -> bool
where
F: Fn(&X, &X) -> bool,
{
x.iter().all(|e| f(e, y))
}
fn below(x: &u8, y: &u8) -> bool {
x < y
}
unsafe fn unsafe_fn(_: u8) {}
fn divergent(_: u8) -> ! {
unimplemented!()
}
fn generic<T>(_: T) -> u8 {
0
}