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Created Nov 25, 2021
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Code shared from the Rust Playground
fn hoge(x: i32) -> i32 {
x + 1
fn fuga(y: i32) -> i32 {
y * 2
fn main() {
let mut f: Box<dyn Fn(i32) -> i32> = Box::new(hoge);
println!("{}", f(15));
f = Box::new(fuga);
println!("{}", f(20));
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