36 lines
815 B
Rust
36 lines
815 B
Rust
//@ run-pass
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use std::mem;
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const FOO: fn(u8) -> u8 = |v: u8| { v };
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const BAR: [fn(&mut u32); 5] = [
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|_: &mut u32| {},
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|v: &mut u32| *v += 1,
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|v: &mut u32| *v += 2,
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|v: &mut u32| *v += 3,
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|v: &mut u32| *v += 4,
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];
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fn func_specific() -> fn() -> u32 {
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|| return 42
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}
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fn generic<T>(_: T) -> fn() -> usize {
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|| mem::size_of::<T>()
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}
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fn main() {
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// Items
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assert_eq!(func_specific()(), 42);
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let foo: fn(u8) -> u8 = |v: u8| { v };
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assert_eq!(foo(31), 31);
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// Constants
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assert_eq!(FOO(31), 31);
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let mut a: u32 = 0;
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assert_eq!({ BAR[0](&mut a); a }, 0);
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assert_eq!({ BAR[1](&mut a); a }, 1);
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assert_eq!({ BAR[2](&mut a); a }, 3);
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assert_eq!({ BAR[3](&mut a); a }, 6);
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assert_eq!({ BAR[4](&mut a); a }, 10);
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assert_eq!(generic(0i8)(), 1);
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}
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