mirror of https://github.com/rust-lang/rust
28 lines
959 B
Rust
28 lines
959 B
Rust
//@ run-pass
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// Tests that we can compare various kinds of extern fn signatures.
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#![allow(non_camel_case_types)]
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// `dbg!()` differentiates these functions to ensure they won't be merged.
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extern "C" fn voidret1() { dbg!() }
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extern "C" fn voidret2() { dbg!() }
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extern "C" fn uintret() -> usize { 22 }
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extern "C" fn uintvoidret(_x: usize) {}
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extern "C" fn uintuintuintuintret(x: usize, y: usize, z: usize) -> usize { x+y+z }
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type uintuintuintuintret = extern "C" fn(usize,usize,usize) -> usize;
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pub fn main() {
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assert!(voidret1 as extern "C" fn() == voidret1 as extern "C" fn());
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assert!(voidret1 as extern "C" fn() != voidret2 as extern "C" fn());
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assert!(uintret as extern "C" fn() -> usize == uintret as extern "C" fn() -> usize);
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assert!(uintvoidret as extern "C" fn(usize) == uintvoidret as extern "C" fn(usize));
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assert!(uintuintuintuintret as uintuintuintuintret ==
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uintuintuintuintret as uintuintuintuintret);
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}
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