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// run-pass
// compile-flags: -Zunleash-the-miri-inside-of-you
fn double(x: usize) -> usize { x * 2 }
const fn double_const(x: usize) -> usize { x * 2 }
const X: fn(usize) -> usize = double;
const X_CONST: fn(usize) -> usize = double_const;
const fn bar(x: usize) -> usize {
X(x)
}
const fn bar_const(x: usize) -> usize {
X_CONST(x)
}
const fn foo(x: fn(usize) -> usize, y: usize) -> usize {
x(y)
}
fn main() {
const Y: usize = bar_const(2);
assert_eq!(Y, 4);
let y = bar_const(2);
assert_eq!(y, 4);
let y = bar(2);
assert_eq!(y, 4);
const Z: usize = foo(double_const, 2);
assert_eq!(Z, 4);
let z = foo(double_const, 2);
assert_eq!(z, 4);
let z = foo(double, 2);
assert_eq!(z, 4);
}
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