-#![feature(plugin, box_syntax, inclusive_range_syntax)]
-
-
-#![warn(no_effect, unnecessary_operation)]
+#![feature(box_syntax, fn_traits, unboxed_closures)]
+#![warn(clippy::no_effect_underscore_binding)]
#![allow(dead_code)]
#![allow(path_statements)]
-#![allow(deref_addrof)]
+#![allow(clippy::deref_addrof)]
+#![allow(clippy::redundant_field_names)]
#![feature(untagged_unions)]
struct Unit;
struct Tuple(i32);
struct Struct {
- field: i32
+ field: i32,
}
enum Enum {
Tuple(i32),
fn drop(&mut self) {}
}
struct DropStruct {
- field: i32
+ field: i32,
}
impl Drop for DropStruct {
fn drop(&mut self) {}
b: f64,
}
-fn get_number() -> i32 { 0 }
-fn get_struct() -> Struct { Struct { field: 0 } }
-fn get_drop_struct() -> DropStruct { DropStruct { field: 0 } }
+fn get_number() -> i32 {
+ 0
+}
+fn get_struct() -> Struct {
+ Struct { field: 0 }
+}
+fn get_drop_struct() -> DropStruct {
+ DropStruct { field: 0 }
+}
+
+unsafe fn unsafe_fn() -> i32 {
+ 0
+}
+
+struct GreetStruct1;
+
+impl FnOnce<(&str,)> for GreetStruct1 {
+ type Output = ();
+
+ extern "rust-call" fn call_once(self, (who,): (&str,)) -> Self::Output {
+ println!("hello {}", who);
+ }
+}
+
+struct GreetStruct2();
-unsafe fn unsafe_fn() -> i32 { 0 }
+impl FnOnce<(&str,)> for GreetStruct2 {
+ type Output = ();
+
+ extern "rust-call" fn call_once(self, (who,): (&str,)) -> Self::Output {
+ println!("hello {}", who);
+ }
+}
+
+struct GreetStruct3 {}
+
+impl FnOnce<(&str,)> for GreetStruct3 {
+ type Output = ();
+
+ extern "rust-call" fn call_once(self, (who,): (&str,)) -> Self::Output {
+ println!("hello {}", who);
+ }
+}
fn main() {
let s = get_struct();
|| x += 5;
let s: String = "foo".into();
FooString { s: s };
+ let _unused = 1;
+ let _penguin = || println!("Some helpful closure");
+ let _duck = Struct { field: 0 };
+ let _cat = [2, 4, 6, 8][2];
+
+ #[allow(clippy::no_effect)]
+ 0;
// Do not warn
get_number();
unsafe { unsafe_fn() };
+ let _used = get_struct();
+ let _x = vec![1];
DropUnit;
DropStruct { field: 0 };
DropTuple(0);
DropEnum::Tuple(0);
DropEnum::Struct { field: 0 };
-
- Tuple(get_number());
- Struct { field: get_number() };
- Struct { ..get_struct() };
- Enum::Tuple(get_number());
- Enum::Struct { field: get_number() };
- 5 + get_number();
- *&get_number();
- &get_number();
- (5, 6, get_number());
- box get_number();
- get_number()..;
- ..get_number();
- 5..get_number();
- [42, get_number()];
- [42, 55][get_number() as usize];
- (42, get_number()).1;
- [get_number(); 55];
- [42; 55][get_number() as usize];
- {get_number()};
- FooString { s: String::from("blah"), };
-
- // Do not warn
- DropTuple(get_number());
- DropStruct { field: get_number() };
- DropStruct { field: get_number() };
- DropStruct { ..get_drop_struct() };
- DropEnum::Tuple(get_number());
- DropEnum::Struct { field: get_number() };
+ GreetStruct1("world");
+ GreetStruct2()("world");
+ GreetStruct3 {}("world");
}