mirror of https://github.com/rust-lang/rust
60 lines
1.1 KiB
Rust
60 lines
1.1 KiB
Rust
//@ run-pass
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// Ensure non-capturing Closure passing CoerceMany work correctly.
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fn foo(_: usize) -> usize {
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0
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}
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fn bar(_: usize) -> usize {
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1
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}
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fn add(a: i32, b: i32) -> i32 {
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a + b
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}
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fn main() {
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// Coerce result check
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type FnPointer = fn(usize) -> usize;
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let c = |x| x;
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let c_pointer: FnPointer = c;
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assert_eq!(c_pointer(42), 42);
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let f = match 0 {
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0 => foo,
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1 => |_| 1,
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_ => unimplemented!(),
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};
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assert_eq!(f(42), 0);
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let f = match 2 {
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2 => |_| 2,
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0 => foo,
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_ => unimplemented!(),
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};
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assert_eq!(f(42), 2);
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let f = match 1 {
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0 => foo,
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1 => bar,
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2 => |_| 2,
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_ => unimplemented!(),
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};
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assert_eq!(f(42), 1);
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let clo0 = |_: usize| 0;
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let clo1 = |_| 1;
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let clo2 = |_| 2;
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let f = match 0 {
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0 => clo0,
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1 => clo1,
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2 => clo2,
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_ => unimplemented!(),
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};
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assert_eq!(f(42), 0);
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let funcs = [add, |a, b| (a - b) as i32];
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assert_eq!([funcs[0](5, 5), funcs[1](5, 5)], [10, 0]);
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}
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