| // Exercise the unused_unsafe attribute in some positive and negative cases |
| |
| #![allow(dead_code)] |
| #![deny(unused_unsafe)] |
| |
| |
| mod foo { |
| extern { |
| pub fn bar(); |
| } |
| } |
| |
| fn callback<T, F>(_f: F) -> T where F: FnOnce() -> T { panic!() } |
| unsafe fn unsf() {} |
| |
| fn bad1() { unsafe {} } //~ ERROR: unnecessary `unsafe` block |
| fn bad2() { unsafe { bad1() } } //~ ERROR: unnecessary `unsafe` block |
| unsafe fn bad3() { unsafe {} } //~ ERROR: unnecessary `unsafe` block |
| fn bad4() { unsafe { callback(||{}) } } //~ ERROR: unnecessary `unsafe` block |
| unsafe fn bad5() { unsafe { unsf() } } //~ ERROR: unnecessary `unsafe` block |
| fn bad6() { |
| unsafe { // don't put the warning here |
| unsafe { //~ ERROR: unnecessary `unsafe` block |
| unsf() |
| } |
| } |
| } |
| unsafe fn bad7() { |
| unsafe { //~ ERROR: unnecessary `unsafe` block |
| unsafe { //~ ERROR: unnecessary `unsafe` block |
| unsf() |
| } |
| } |
| } |
| |
| unsafe fn good0() { unsf() } |
| fn good1() { unsafe { unsf() } } |
| fn good2() { |
| /* bug uncovered when implementing warning about unused unsafe blocks. Be |
| sure that when purity is inherited that the source of the unsafe-ness |
| is tracked correctly */ |
| unsafe { |
| unsafe fn what() -> Vec<String> { panic!() } |
| |
| callback(|| { |
| what(); |
| }); |
| } |
| } |
| |
| unsafe fn good3() { foo::bar() } |
| fn good4() { unsafe { foo::bar() } } |
| |
| #[allow(unused_unsafe)] fn allowed() { unsafe {} } |
| |
| fn main() {} |