43 lines
1.4 KiB
Rust
43 lines
1.4 KiB
Rust
// allow(const_err) to work around a bug in warnings
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#[allow(const_err)]
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static FOO: fn() = || { assert_ne!(42, 43) };
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#[allow(const_err)]
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static BAR: fn(i32, i32) = |a, b| { assert_ne!(a, b) };
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// use to first make the closure FnOnce() before making it fn()
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fn force_once0<R, F: FnOnce() -> R>(f: F) -> F { f }
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fn force_once1<T, R, F: FnOnce(T) -> R>(f: F) -> F { f }
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fn force_mut0<R, F: FnMut() -> R>(f: F) -> F { f }
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fn force_mut1<T, R, F: FnMut(T) -> R>(f: F) -> F { f }
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fn main() {
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FOO();
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BAR(44, 45);
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let bar: unsafe fn(i32, i32) = BAR;
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unsafe { bar(46, 47) };
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let boo: &dyn Fn(i32, i32) = &BAR;
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boo(48, 49);
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let f: fn() = ||{};
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f();
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let f = force_once0(||{}) as fn();
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f();
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let f = force_mut0(||{}) as fn();
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f();
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let g: fn(i32) = |i| assert_eq!(i, 2);
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g(2);
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let g = force_once1(|i| assert_eq!(i, 2)) as fn(i32);
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g(2);
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let g = force_mut1(|i| assert_eq!(i, 2)) as fn(i32);
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g(2);
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// FIXME: This fails with "invalid use of NULL pointer" <https://github.com/rust-lang/miri/issues/1075>
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//let h: fn() -> ! = || std::process::exit(0);
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//h();
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// FIXME: This does not even compile?!? <https://github.com/rust-lang/rust/issues/66738>
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//let h = magic0(|| std::process::exit(0)) as fn() -> !;
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//h();
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// Once these tests pass, they should be in separate files as they terminate the process.
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}
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