rust/tests/ui/trivially_copy_pass_by_ref.rs

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#![allow(many_single_char_names, blacklisted_name)]
#[derive(Copy, Clone)]
struct Foo(u32);
#[derive(Copy, Clone)]
struct Bar([u8; 24]);
type Baz = u32;
fn good(a: &mut u32, b: u32, c: &Bar) {
}
fn good_return_implicit_lt_ref(foo: &Foo) -> &u32 {
&foo.0
}
#[allow(needless_lifetimes)]
fn good_return_explicit_lt_ref<'a>(foo: &'a Foo) -> &'a u32 {
&foo.0
}
fn bad(x: &u32, y: &Foo, z: &Baz) {
}
impl Foo {
fn good(self, a: &mut u32, b: u32, c: &Bar) {
}
fn good2(&mut self) {
}
fn bad(&self, x: &u32, y: &Foo, z: &Baz) {
}
fn bad2(x: &u32, y: &Foo, z: &Baz) {
}
}
impl AsRef<u32> for Foo {
fn as_ref(&self) -> &u32 {
&self.0
}
}
impl Bar {
fn good(&self, a: &mut u32, b: u32, c: &Bar) {
}
fn bad2(x: &u32, y: &Foo, z: &Baz) {
}
}
fn main() {
let (mut foo, bar) = (Foo(0), Bar([0; 24]));
let (mut a, b, c, x, y, z) = (0, 0, Bar([0; 24]), 0, Foo(0), 0);
good(&mut a, b, &c);
good_return_implicit_lt_ref(&y);
good_return_explicit_lt_ref(&y);
bad(&x, &y, &z);
foo.good(&mut a, b, &c);
foo.good2();
foo.bad(&x, &y, &z);
Foo::bad2(&x, &y, &z);
bar.good(&mut a, b, &c);
Bar::bad2(&x, &y, &z);
foo.as_ref();
}