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//@ check-pass
//@ run-rustfix
extern "C" {
fn test();
}
fn a() {}
extern "C" fn c() {}
extern "C" fn args(_a: i32) -> i32 { 0 }
#[derive(PartialEq, Eq)]
struct A {
f: fn(),
}
fn main() {
let f: fn() = a;
let g: fn() = f;
let a1 = A { f };
let a2 = A { f };
let _ = f == a;
//~^ WARN function pointer comparisons
let _ = f != a;
//~^ WARN function pointer comparisons
let _ = f == g;
//~^ WARN function pointer comparisons
let _ = f == f;
//~^ WARN function pointer comparisons
let _ = g == g;
//~^ WARN function pointer comparisons
let _ = g == g;
//~^ WARN function pointer comparisons
let _ = &g == &g;
//~^ WARN function pointer comparisons
let _ = a as fn() == g;
//~^ WARN function pointer comparisons
let cfn: extern "C" fn() = c;
let _ = cfn == c;
//~^ WARN function pointer comparisons
let argsfn: extern "C" fn(i32) -> i32 = args;
let _ = argsfn == args;
//~^ WARN function pointer comparisons
let t: unsafe extern "C" fn() = test;
let _ = t == test;
//~^ WARN function pointer comparisons
let _ = a1 == a2; // should not warn
let _ = a1.f == a2.f;
//~^ WARN function pointer comparisons
}
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