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