--- /dev/null
+// normalize-stderr-test "\(\d+ byte\)" -> "(N byte)"
+// normalize-stderr-test "\(limit: \d+ byte\)" -> "(limit: N byte)"
+
+#![deny(clippy::trivially_copy_pass_by_ref)]
+#![allow(
+ clippy::many_single_char_names,
+ clippy::blacklisted_name,
+ clippy::redundant_field_names
+)]
+
+#[derive(Copy, Clone)]
+struct Foo(u32);
+
+#[derive(Copy, Clone)]
+struct Bar([u8; 24]);
+
+#[derive(Copy, Clone)]
+pub struct Color {
+ pub r: u8,
+ pub g: u8,
+ pub b: u8,
+ pub a: u8,
+}
+
+struct FooRef<'a> {
+ foo: &'a Foo,
+}
+
+type Baz = u32;
+
+fn good(a: &mut u32, b: u32, c: &Bar) {}
+
+fn good_return_implicit_lt_ref(foo: &Foo) -> &u32 {
+ &foo.0
+}
+
+#[allow(clippy::needless_lifetimes)]
+fn good_return_explicit_lt_ref<'a>(foo: &'a Foo) -> &'a u32 {
+ &foo.0
+}
+
+fn good_return_implicit_lt_struct(foo: &Foo) -> FooRef {
+ FooRef { foo }
+}
+
+#[allow(clippy::needless_lifetimes)]
+fn good_return_explicit_lt_struct<'a>(foo: &'a Foo) -> FooRef<'a> {
+ FooRef { foo }
+}
+
+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) {}
+}
+
+trait MyTrait {
+ fn trait_method(&self, _foo: &Foo);
+}
+
+pub trait MyTrait2 {
+ fn trait_method2(&self, _color: &Color);
+}
+
+impl MyTrait for Foo {
+ fn trait_method(&self, _foo: &Foo) {
+ unimplemented!()
+ }
+}
+
+#[allow(unused_variables)]
+mod issue3992 {
+ pub trait A {
+ #[allow(clippy::trivially_copy_pass_by_ref)]
+ fn a(b: &u16) {}
+ }
+
+ #[allow(clippy::trivially_copy_pass_by_ref)]
+ pub fn c(d: &u16) {}
+}
+
+mod issue5876 {
+ // Don't lint here as it is always inlined
+ #[inline(always)]
+ fn foo_always(x: &i32) {
+ println!("{}", x);
+ }
+
+ #[inline(never)]
+ fn foo_never(x: &i32) {
+ println!("{}", x);
+ }
+
+ #[inline]
+ fn foo(x: &i32) {
+ println!("{}", x);
+ }
+}
+
+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();
+}